Heatcraft H-IM-SCU User manual

H-IM-SCU October 2015 Part No. 25008501
Screw Compressor Condensing Units
Installation and
Operations Manual
Table of Contents
General Safety Information.............................................2
Inspection .......................................................................2
Warranty Statement........................................................2
Space and Location Requirements ................................3
Condensing Unit Rigging and Mounting .........................4
Head Pressure Control....................................................4
Refrigerant Oils...............................................................4
Recommended Refrigerant Piping Practices..................5
Refrigeration Pipe Supports ...........................................5
Suction Lines ..................................................................6
Liquid Lines ....................................................................6
Unit Cooler Piping ...........................................................6
Line Sizing Tables ....................................................... 7-9
Evacuation and Leak Detection ....................................10
Refrigerant Charging Instructions.................................10
Field Wiring...................................................................10
Check Out and Start Up ................................................11
Operational Check Out..................................................11
System Balancing-Compressor Superheat...................11
General Sequence of Operation.............................. 12-17
System Troubleshooting Guide .....................................18
Magnum Alarm and Safeties ........................................20
Magnum System Alarms...............................................21
Setpoint Safety Alarms ........................................... 21-22
Preventive Maintenance Guidelines .............................23
Typical Wiring Diagrams ...............................................24
InterLink™ Replacement Parts ....................................26

2© 2015 Heatcraft Refrigeration Products, LLC
1. Installation and maintenance to be performed only by qualied
personnel who are familiar with this type of equipment.
2. All units are pressurized with dry air or inert gas.
All units must be evacuated before charging the system with refrigerant.
3. Make sure that all eld wiring conforms to the requirements
of the equipment and all applicable national and local codes.
WARNING: Refrigerant can be harmful if it is inhaled. Refrigerant must be used and recovered responsibly.
Failure to follow this warning may result in personal injury or death.
Inspection
Responsibility should be assigned to a dependable individual at the job site to receive
material. Each shipment should be carefully checked against the bill of lading. The
shipping receipt should not be signed until all items listed on the bill of lading have
been accounted. Check carefully for concealed damage. Any shortage or damages
should be reported to the delivering carrier. Damaged material becomes the delivering
carrier’s responsibility, and should not be returned to the manufacturer unless prior
approval is given to do so. When uncrating, care should be taken to prevent damage.
Heavy equipment should be left on its shipping base until it has been moved to the
nal location. Check the serial tag information with invoice. Report any discrepancies
to your Heatcraft Refrigeration Products Sales Representative.
Warranty Statement
Seller warrants to its direct purchasers that products, including Service Parts,
manufactured by SELLER shall be of a merchantable quality, free of defects in
material or workmanship, under normal use and service for a period of one (1)
year from date of original installation, or eighteen (18) months from date of
shipment by SELLER, whichever rst occurs. Any product covered by this order found
to Seller’s satisfaction to be defective upon examination at Seller’s factory will at
SELLER’s option, be repaired or replaced and returned to Buyer via lowest common
carrier, or SELLER may at its option grant Buyer a credit for the purchase price of the
defective article. Upon return of a defective product to SELLER’s plant, freight prepaid,
by Buyer, correction of such defect by repair or replacement, and return freight via
lowest common carrier, shall constitute full performance by SELLER of its obligations
hereunder.
SELLER shall have no liability for expenses incurred for repairs made by Buyer except
by prior, written authorization. Every claim on account of breach of warranty shall be
made to SELLER in writing within the warranty period specied above – otherwise
such claim shall be deemed waived. Seller shall have no warranty obligation
whatsoever if its products have been subjected to alteration, misuse, negligence,
free chemicals in system, corrosive atmosphere, accident, or if operation is contrary
to SELLER’s or manufacturer’s recommendations, or if the serial number has been
altered, defaced, or removed.
Motor Compressors
Motor compressors furnished by SELLER are subject to the standard warranty
terms set forth above, except that motor compressor replacements or exchanges
shall be made through the nearest authorized wholesaler of the motor compressor
manufacturer (not at SELLER’s factory) and no freight shall be allowed for
transportation of the motor compressor to and from the wholesaler. The replacement
motor compressor shall be identical to the model of the motor compressor being
replaced. Additional charges which may be incurred throughout the substitution of
other than identical replacements are not covered by this warranty. An optional, non
assignable, four (4) year extended compressor warranty may be purchased within
the boundaries of the United Sates of America, its territories and possessions, and
Canada. With this extended compressor warranty, replacements are administered by
an authorized compressor distributor only. Replacements within the rst year of the
warranty area available through the distributor; the second through fth years, the
purchaser must submit a proof-of-purchase of a compressor and supply it to Heatcraft
Refrigeration Products Warranty Claims for reimbursement.
Seller makes no express warranties except as noted above. All implied warranties
are limited to the duration of the Express Warranty. Liability for incidental and
consequential damages is excluded.
The forgoing is in lieu of all other warranties, express or implied, notwithstanding the
provisions of the uniform commercial code, the Magnuson-Moss Warranty - Federal
Trade Commission Improvement Act, or any other statutory or common law, federal or
state.
SELLER makes no warranty, express or implied, of tness for any particular purpose,
or of any nature whatsoever, with respect to products manufactures or sold by seller
hereunder, except as specically set forth above and on the face hereof. It is expressly
understood and agreed that SELLER shall not be liable to buyer, or any customer of
buyer, for direct or indirect, special, incidental, consequential or penal damages, or
for any expenses incurred by reason of the use or misuse by buyer or third parties of
said products. To the extent said products may be considered "consumer products,"
As dened in Sec. 101 of the Magnuson-Moss Warranty - Federal Trade Commission
Improvement Act, SELLER makes no warranty of any kind, express or implied, to
"consumers," except as specically set forth above and on the face hereof.
The following conditions should be adhered to when installing this unit to maintain the
manufacturers warranty:
1. System piping must be in accordance with good refrigeration
practices.
2. Inert gas must be charged into the piping during brazing.
3. The power supply to the unit must meet the following conditions:
A. Three phase voltages must be +/- 10%
of nameplate ratings.
4. B. Phase imbalance cannot exceed 2%.
5. All control and safety switch circuits must be properly connected
according to the wiring diagram.
6. The factory installed wiring and piping must not be changed
without written factory approval.
7. All equipment is installed in accordance with Heatcraft Refrigeration Products
specied minimum clearances.
4. Avoid contact with sharp edges and coil surfaces.
They are a potential injury hazard.
5. Make sure all power sources are disconnected before any
service work is done on units.
General Safety Information

3
© 2015 Heatcraft Refrigeration Products, LLC
The most important consideration which must be taken into account when
deciding upon the location of air-cooled equipment is the provision for a supply of
ambient air to the condenser, and removal of heated air from the condensing unit
or remote condenser area. Where this essential requirement is not adhered to,
it will result in higher head pressures, which cause poor operation and potential
failure of equipment. Units must not be located in the vicinity of steam, hot air or
fume exhausts. Corrosive atmospheres require custom designed condensers.
Another consideration which must be taken is that the unit should be mounted away
from noise sensitive spaces and must have adequate support to avoid vibration
and noise transmission into the building. Units should be mounted over corridors,
utility areas, rest rooms and other auxiliary areas where high levels of sound are
not an important factor. Sound and structural consultants should be retained for
recommendations.
Space and Location Requirements for
Air Cooled Condensing Units
Multiple Units
For units placed side by side, the minimum distance between units is the
width of the largest unit. If units are placed end to end, the minimum distance
between units is 4 feet.
Units in Pits
The top of the unit should be level with the top of the pit, and side distance
increased to “2W”. If the top of the unit is not level with the top of pit, dis-
charge cones or stacks must be used to raise discharge air to the top of the
pit. This is a minimum requirement.
Decorative Fences
Fences must have 50% free area, with 1 foot undercut, a “W” minimum
clearance, and must not exceed the top ofunit. If these requirements are not
met, unit must be installed as indicated for “Units in pits".
Walls or Obstructions
The unit should be located so that air may circulate freely and not be recirculated.
For proper air ow and access all sides of the unit should be a minimum of “W” away
from any wall or obstruction. It is preferred that this distance be increased whenever
possible. Care should be taken to see that ample room is left for maintenance work
through access doors and panels. Overhead obstructions are not permitted. When
the unit is in an area where it is enclosed by three walls the unit must be installed as
indicated for units in a pit.
Clearance From Walls or Obstructions
Clearance For Multiple Units Placed Side by Side
Clearance For Units in Pits
Clearance For Fence Enclosures

4© 2015 Heatcraft Refrigeration Products, LLC
Figure 4. Pad Mount for Mobile or Deep Sump Application
Condensing Unit Rigging and Mounting
Rigging holes are provided on all units. Caution should be exercised when moving
these units. To prevent damage to the unit housing during rigging, cables or chains
used must be held apart by spacer bars. The mounting platform or base should be
level and located so as to permit free access of supply air.
Ground Mounting
Concrete slab raised six inches above ground level provides a suitable base. Raising
the base above ground level provides some protection from ground water and wind
blown matter. Before tightening mounting bolts, recheck level of unit. The unit should
in all cases be located with a clear space in all directions that is at a minimum, equal
to the height of the unit above the mounting surface. A condensing unit mounted in
a corner formed by two walls, may result in discharge air recirculation with resulting
loss of capacity.
Roof Mounting
Due to the weight of the units, a structural analysis by a qualied engineer may be
required before mounting. Roof mounted units should be installed level on steel
channels or an I-beam frame capable of supporting the weight of the unit. Vibration
absorbing pads or springs should be installed between the condensing unit legs or
frame and the roof mounting assembly.
Access
Sufcient access must provided to ensure future service of all major components is pos-
sible. The screw compressor, as well as some of the compressors removable components
are heavy enough to require additional lifting equipment for service. Care must be taken
during condensing unit placement to accommodate the use of service equipment for
maintenance or repair.
Pad Mounted Compressor
All units use pad mounted compressors. Check the compressor mounting bolts to
insure they have not vibrated loose during shipment. See Figure 4.
Head Pressure Control
Head pressure control is managed by the microprocessor controller. Fan manage-
ment is constantly monitored and adjusted by the controller to maintain the target
head pressure.
a. Dual Valve System
The system employs an ORI (open on rise of inlet pressure) valve and an ORD
(open on rise of differential pressure) valve. The high pressure discharge gas is
introduced above the liquid in the receiver tank. The receiver discharge is regulated
by the ORI valve.
Operation and Adjustment
Condensing units with dual valves require sufcient charge to partially ood the
condenser during low ambient conditions.
Valve adjustment should be made with gauges connected to the discharge port of
the compressor. Adjustments should be made during mild or low ambient conditions.
Turning the valve stem “clockwise” on the ORI valve will increase the discharge
pressure, while turning the valve stem “counterclockwise” will decrease the discharge
pressure.
If adjustments are made during warm ambient conditions, it may not be possible to
adjust the regulator valve as low as desired. Readjustment may be necessary once
cooler conditions prevail.
The discharge pressure of the ORI valve must be adjusted to regulate the unit for
proper operating conditions. Adjust the ORI valve shown on the following diagram to
maintain a discharge pressure of 160 to 180 PSIG.“ooding” of the condenser with
liquid refrigerant reduces the available condensing surface, holding the condensing
pressure at the valve setting.
b. Ambient Fan Cycle Control
This is an automatic winter control method which will maintain a condensing pressure
within reasonable limits by cycling fan motors in response to outside air temperature.
The thermostat(s) should be eld adjusted to shut off the fan when the condensing
temperature is reduced to approximately 90˚F. Table 1 lists approximate settings for
several system T.D.’s. These settings are approximate as they do not take into account
variations in load.
Rubber
Oil Type
BITZER Compact Screws are available in both standard CSH models for medium and
high temperature condensing applications. These compressors offer excellent part and
full load efciencies.
A key aspect to utilizing these compressors to their fullest potential is specifying
the correct oil for your refrigerant. CSH screws may use BSE 170 oil in a variety of
refrigerants (R134a, R407C, R404A and R507A).
Table 2. Refrigeration Oils
ISO 170 (880 SUS) POE oil
OIL CHANGE
As received, the POE lubricant will be clear or straw colored. After use, it may acquire
a darker color. This does not indicate a problem as the darker color merely reects the
activity of the lubricant's protective additive.
BYPASS
REGULATOR
CHECK
VALV E
DRAIN
REGULATOR
STD. LIQUID
LINE OUTLET
RECEIVER DIP TUBE
COMPRESSOR
AIR COOLED
CONDENSER
DISCHARGE
LINE
Washer Compressor for
Mounting Foot

5
© 2015 Heatcraft Refrigeration Products, LLC
Polyol Ester Lubricants Hygroscopicity
Ester lubricants (POE) have the characteristic of quickly absorbing moisture from the
ambient surroundings. This is shown graphically in Figure 8 where it can be seen
that such lubricants absorb moisture faster and in greater quantity than conventional
mineral oils. Since moisture levels greater than 100 ppm will results in system
corrosion and ultimate failure, it is imperative that compressors, components,
containers and the entire system be kept sealed as much as possible. Lubricants
will be packaged in specially designed, sealed containers. After opening, all the
lubricant in a container should be used at once since it will readily absorb moisture
if left exposed to the ambient. Any unused lubricant should be properly disposed
of. Similarly, work on systems and compressors must be carried out with the open
time as short as possible. Leaving the system or compressor open during breaks or
overnight MUST BE AVOIDED!
Color
Figure 8.
Figure 9. Example of Pipe Support
The following procedures should be followed:
1. Do not leave dehydrated compressors or lter-driers on condensing units
open to the atmosphere any longer than is absolutely necessary.
2. Use only refrigeration grade copper tubing, properly sealed
against contamination.
3. Suction lines should slope 1/4" per 10 feet towards the compressor.
4. Suitable P-type oil traps should be located at the base of each
suction riser to enhance oil return to the compressor.
5. For desired method of superheat measurement, a pressure tap
should be installed in each evaporator suction line in
the proximity of the expansion valve bulb.
6. When brazing refrigerant lines, an inert gas should be passed
through the line at low pressure to prevent scaling and
oxidation inside the tubing. Dry nitrogen is preferred.
7. Use only a suitable silver solder alloy on suction and liquid lines.
Recommended Refrigerant Piping Practices
The system as supplied by Heatcraft Refrigeration Products, was thoroughly cleaned
and dehydrated at the factory. Foreign matter may enter the system by way of the
evaporator to condensing unit piping. Therefore, care must be used during installation
of the piping to prevent entrance of foreign matter.
Install all refrigeration system components in accordance with applicable local and
national codes and in conformance with good practice required for the proper opera-
tion of the system.
The refrigerant pipe size should be selected from the Line Sizing Tables. The intercon-
necting pipe size is not necessarily the same size as the stub-out on the condensing
unit or the evaporator.
Figure 10. Condensing Unit / Compressor to Wall Support
8. Limit the soldering paste or ux to the minimum required to
prevent contamination of the solder joint internally. Flux only the
male portion of the connection, never the female. After brazing,
remove excess ux.
9. If isolation valves are installed at the evaporator, full port ball
valves should be used.
Refrigerant Pipe Support
1. Normally, any straight run of tubing must be supported in at least two
locations near each end of the run. Long runs require additional
supports. The refrigerant lines should be supported and fastened
properly. As a guide, 3/8 to 7/8 should be supported every 5 feet; 1-1/8
every 7 feet; and 1-5/8 and 2-1/8 every 9 to 10 feet.
2. When changing directions in a run of tubing, no corner should be left
unsupported. Supports should be placed a maximum of 2 feet in each
direction from the corner.
3. Piping attached to a vibrating object (such as a compressor or
compressor base) must be supported in such a manner that will not
restrict the movement of the vibrating object. Rigid mounting will
fatigue the copper tubing.
4. Do not use short radius ells. Short radius elbows have points of excessive
stress concentration and are subject to breakage at these points.
5. Thoroughly inspect all piping after the equipment is in operation and
add supports wherever line vibration is signicantly greater than most of
the other piping. Extra supports are relatively inexpensive as compared to
refrigerant loss.

6© 2015 Heatcraft Refrigeration Products, LLC
Suction Lines
Horizontal suction lines should slope away from the evaporator toward the compressor
at the rate of 1/4 inch per 10 feet for good oil return. When multiple evaporators are
connected in series using a common suction line, the branch suction lines must enter
the top of the common suction line.
For dual or multiple evaporator systems, the branch lines to each evaporator should
be sized for the evaporator capacity. The main common line should be sized for the
total system capacity.
Suction lines that are outside of refrigerated space must be insulated. See the Line
Insulation section on page 14 for more information.
Figure 11. Suction P-Traps
Slope 1/4"
per 10 ft.
toward
compressor
Figure 12. Double Suction Riser Construction
Sized for
Minimum
Load
Sized
for Full
Load
Sized for
Minimum
Load
Sized
for Full
Load
Suction Line Risers
Prefabricated wrought copper traps are available, or a trap can be made by using two
street ells and one regular ell. The suction trap must be the same size as the suction
line. For long vertical risers, additional traps may be necessary. Generally, one trap
is recommended for each length of pipe (approximately 20 feet) to insure proper oil
movement. See Figure 11 for methods of constructing proper suction line P-traps.
Liquid Lines
Liquid lines should be sized for a minimum pressure drop to prevent “ashing”. Flashing in the liquid lines would create additional pressure drop and poor expansion valve
operation. If a system requires long liquid lines from the receiver to the evaporator or if the liquid has to rise vertically upward any distance, the losses should be calculated
to determine whether or not a heat exchanger is required. The use of a suction to liquid heat exchanger may be used to subcool the liquid to prevent ashing. This method of
subcooling will normally provide no more than 20˚F subcooling on high pressure systems. The amount of subcooling will depend on the design and size of the heat exchanger
and on the operating suction and discharge pressures. An additional benet from the use of the suction to liquid type heat exchanger is that it can help raise the superheat in the
suction line to prevent liquid return to the compressor via the suction line. Generally, heat exchangers are not recommended on R- low temperature systems. However, they have
proved necessary on short, well insulated suction line runs to provide superheat at the compressor.
Pipe size example:
Given: 30*F Cooler with one system having (2) evaporators
• One condensing unit rated at 350,000 BTUH’s @ 20°F SST R404A refrigerant.
• Two evaporators each rated at 175,000 BTUH’s @ 10°F TD.
• 100 feet of actual line run between condensing unit to rst evaporator
and 20 feet of actual line run between the rst evaporator and the second
evaporator (see gure below).
How to gure line sizes:
1. Determine equivalent line run = actual run + valves and tting allowances.
2. Use Line Sizing Tables to size lines.
3. Note any special considerations.
Fittings in this system:
• (6) 90° elbows in main line plus a 90° turn through a tee.
• (5) additional 90° elbows to rst evaporator.
• (4) additional 90° elbows to second evaporator.
Determine line size 1 (main line from condensing unit):
1. Main line from the condensing unit to be sized for the total capacity
(balance) of the whole system of 350,000 BTUH’s (Table 8).
2. Refer to 350,000@100 feet at 20°F SST R404A on the chart.
You will nd the suction line to be 2-5/8"and 1-3/8" liquid line.
3. Refer to Table 5. For every 1-3/8" 90° elbow you must add 7 equivalent
feet of pipe and 4 equivalent feet of pipe for each 1-3/8" tee.
Therefore, total equivalent line run =
Actual line run 100 feet
+ (6) 2-5/8" elbows @ 4' 42 feet
+ (1) 2-5/8" tee @ 2.5' 2.5 feet
Total equivalent line run 146 feet
4. Refer to Table 8. For 126.5 total equivalent feet, the suction
line size should be 2-5/8" and the liquid line stays at 1-3/8" line.
Determine line size 2 (evaporators):
1. Line sizing to each evaporator is based on 175,000 BTUH’s and
equivalent run from condensing unit. First evaporator has an 105 ft.
run and the second evaporator has a 120 ft. run.
2. Table 8 indicates 1-5/8" suction for the rst evaporator and indicates
1-5/8" suction for the second evaporator.
3. Refer to Table 5. Each 1-5/8" 90° elbow adds 4 equivalent feet of pipe.
Each 90° turn through a 1-5/8" tee adds 8 equivalent feet.
4. Actual line run (evap 1)105 feet
+ (5) 1-5/8" elbows @ 4' 20 feet
+ (1) 90° turn through tee @ 8' 6 feet
Total equivalent line run 133 feet
Actual line run (evap 2) 120 feet
+ (4) 1-5/8" elbows @ 3' 16 feet
Total equivalent line run 136 feet
5. Table 8 indicates 1-5/8" suction line and 1-1/8" liquid line from
main line to both evaporators.
Unit Cooler Piping
Evap. 1
Evap. 2
NOTE: A suction line trap must be installed at the point where piping changes the direction of refrigerant ow from any horizontal run to an upward vertical run.
NOTE: The gray shaded areas on Table 8. For 350,000 BTUH’s, the maximum suc-
tion riser is 2-5/8"to insure proper oil return and pressure drop from the bottom
p-trap to the top p-trap.

7
Refrigerant
Liquid Line Rise in Feet
10' 15' 20' 25' 30' 40' 50' 75' 100'
PSIG ˚F PSIG ˚F PSIG ˚F PSIG ˚F PSIG ˚F PSIG ˚F PSIG ˚F PSIG ˚F PSIG ˚F
R507, R404A,
R407c 4.1 1.1 6.1 1.6 8.2 2.1 10.2 2.7 12.2 3.3 16.3 4.1 20.4 5.6 30.6 8.3 40.8 11.8
Copper Tube, O.D., Type “L” 1/2 5/8 7/8 1-1/8 1-3/8 1-5/8 2-1/8 2-5/8 3-1/8 3-5/8 4-1/8 5-1/8 6-1/8
Globe Valve (Open) 14 16 24 28 36 42 57 69 83 99 118 138 168
Angle Valve (Open) 7 9 12 15 18 21 28 34 42 49 57 70 83
90˚ Turn Through Tee 3 4 5 6 8 9 12 14 17 20 24 28 34
Tee (Straight Through) or Sweep Below .75 1 1.5 2 2.5 3 3.5 4 5 6 7 9 11
90˚ Elbow or Reducing Tee (Straight Through) 1 2 2 3 4 4 5 7 8 10 12 14 16
Based on 110˚F liquid temperature at bottom of riser.
Table 5. Equivalent Feet of Pipe Due to Valve and Fitting Friction
© 2015 Heatcraft Refrigeration Products, LLC
Line Size O.D.
(Inches) Refrigerant Liquid Line Hot Gas Line +20˚F +40˚F
3/8 R507, 404A, R407C 3.4 0.31 0.09 0.13
1/2 R507, 404A, R407C 6.4 0.58 0.16 0.24
5/8 R507, 404A, R407C 10.3 0.93 0.25 0.35
7/8 R507, 404A, R407C 21.2 1.92 0.51 0.72
1-1/8 R507, 404A, R407C 36.1 3.27 0.86 1.24
1-3/8 R507, 404A, R407C 55.0 4.98 1.32 1.87
1-5/8 R507, 404A, R407C 78.0 7.07 1.86 2.64
2-1/8 R507, 404A, R407C 134 12.25 3.23 4.58
2-5/8 R507, 404A, R407C 209 18.92 5.00 7.07
3-1/8 R507, 404A, R407C 298 27.05 7.14 9.95
3-5/8 R507, 404A, R407C 403 36.50 19.65 13.67
4-1/8 R507, 404A, R407C 526 47.57 12.58 17.80
5-1/8 R507, 404A, R407C 812 73.43 19.42 27.48
Line Sizing
The following Tables 6 and 7 indicate liquid lines and suction lines for all condensing units for R404A, R507, and R407C.
When determining the refrigerant line length, be sure to add an allowance for ttings. See Table 5. Total equivalent length of refrigerant lines is the sum of the actual linear foot-
age and the allowance for ttings.
Table 4. Pressure Loss of Liquid Refrigerants in Liquid Line Risers (Expressed in Pressure Drop, PSIG, and Subcooling Loss, ˚F)
Table 3. Weight of Refrigerants in Copper Lines During Operation (Pounds per 100 lineal feet of type "L" tubing)

8© 2015 Heatcraft Refrigeration Products, LLC
* NOTES:
1. Sizes that are highlighted indicate maximum suction line sizes that should be used for risers. Riser size should not exceed horizontal size.
Properly placed suction traps must also be used for adequate oil return. All sizes shown are for O.D. Type L copper tubing.
2. Suction line sizes selected at pressure drop equivalent to 2˚F. Reduce estimate of system capacity accordingly.
3. If system load drops below 40% of design, consideration to installing double suction risers should be made.
Capacity 45 Degrees 40 Degrees 30 Degrees
25' 50' 75' 100' 150' 200' 250' 25' 50' 75' 100' 150' 200' 250' 25' 50' 75' 100' 150' 200' 250'
1000 3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8
3000 3/8 3/8 3/8 3/8 3/8 1/2 1/2 3/8 3/8 3/8 3/8 1/2 1/2 1/2 3/8 3/8 3/8 1/2 1/2 1/2 1/2
4000 3/8 3/8 1/2 1/2 1/2 1/2 1/2 3/8 3/8 1/2 1/2 1/2 1/2 1/2 3/8 1/2 1/2 1/2 1/2 5/8 5/8
6000 1/2 1/2 1/2 1/2 1/2 5/8 5/8 3/8 1/2 1/2 1/2 5/8 5/8 5/8 1/2 1/2 1/2 5/8 5/8 5/8 5/8
9000 1/2 1/2 5/8 5/8 5/8 5/8 5/8 1/2 1/2 5/8 5/8 5/8 5/8 5/8 1/2 5/8 5/8 5/8 7/8 7/8 7/8
12000 1/2 5/8 5/8 5/8 5/8 7/8 7/8 1/2 5/8 5/8 7/8 7/8 7/8 7/8 5/8 5/8 5/8 7/8 7/8 7/8 7/8
15000 5/8 5/8 5/8 7/8 7/8 7/8 7/8 5/8 5/8 7/8 7/8 7/8 7/8 7/8 5/8 5/8 7/8 7/8 7/8 7/8 7/8
18000 5/8 7/8 7/8 7/8 7/8 7/8 7/8 5/8 7/8 7/8 7/8 7/8 7/8 7/8 5/8 7/8 7/8 7/8 7/8 7/8 7/8
24000 5/8 7/8 7/8 7/8 7/8 7/8 7/8 5/8 7/8 7/8 7/8 7/8 7/8 7/8 7/8 7/8 7/8 7/8 7/8 1 1/8 1 1/8
30000 7/8 7/8 7/8 7/8 1 1/8 1 1/8 1 1/8 7/8 7/8 7/8 7/8 1 1/8 1 1/8 1 1/8 7/8 7/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8
36000 7/8 7/8 7/8 7/8 1 1/8 1 1/8 1 1/8 7/8 7/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 7/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8
42000 7/8 7/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 7/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 7/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8
48000 7/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 7/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8
54000 7/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 7/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8
60000 7/8 1 1/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 7/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 7/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8
66000 7/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 7/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 7/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8
72000 7/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 7/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 7/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 1 3/8
78000 7/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 7/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 1 3/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8
84000 7/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 1 3/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 1 3/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 1 5/8 1 5/8
90000 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 1 5/8 1 5/8 1 1/8 1 3/8 1 3/8 1 3/8 1 5/8 1 5/8 1 5/8
120000 1 1/8 1 3/8 1 3/8 1 5/8 1 5/8 1 5/8 1 5/8 1 1/8 1 3/8 1 3/8 1 5/8 1 5/8 1 5/8 1 5/8 1 1/8 1 3/8 1 3/8 1 5/8 1 5/8 1 5/8 1 5/8
150000 1 1/8 1 3/8 1 3/8 1 5/8 1 5/8 1 5/8 2 1/8 1 3/8 1 3/8 1 5/8 1 5/8 1 5/8 2 1/8 2 1/8 1 3/8 1 5/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8
180000 1 3/8 1 3/8 1 5/8 1 5/8 1 5/8 2 1/8 2 1/8 1 3/8 1 3/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 1 3/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8
210000 1 3/8 1 5/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 1 3/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 1 3/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8
240000 1 3/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8
300000 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 5/8
360000 1 5/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 5/8
480000 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 5/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 5/8 2 1/8 2 5/8 2 5/8 2 5/8 3 1/8 3 1/8 3 1/8
600000 2 1/8 2 1/8 2 5/8 2 5/8 2 5/8 3 1/8 3 1/8 2 1/8 2 5/8 2 5/8 2 5/8 3 1/8 3 1/8 3 1/8 2 1/8 2 5/8 2 5/8 2 5/8 3 1/8 3 1/8 3 1/8
720000 2 1/8 2 5/8 2 5/8 2 5/8 3 1/8 3 1/8 3 1/8 2 1/8 2 5/8 2 5/8 3 1/8 3 1/8 3 1/8 3 1/8 2 1/8 2 5/8 2 5/8 3 1/8 3 1/8 3 1/8 3 1/8
900000 2 5/8 2 5/8 3 1/8 3 1/8 3 1/8 3 5/8 3 5/8 2 5/8 2 5/8 3 1/8 3 1/8 3 5/8 3 5/8 3 5/8 2 5/8 2 5/8 3 1/8 3 1/8 3 5/8 3 5/8 3 5/8
1200000 2 5/8 2 5/8 3 1/8 3 5/8 3 5/8 3 5/8 3 5/8 2 5/8 3 1/8 3 1/8 3 5/8 3 5/8 3 5/8 3 5/8 3 1/8 3 1/8 3 1/8 3 5/8 3 5/8 3 5/8 4 1/8
1400000 2 5/8 3 5/8 3 5/8 3 5/8 4 1/8 4 1/8 4 1/8 2 5/8 3 1/8 3 1/8 3 5/8 4 1/8 4 1/8 4 1/8 3 1/8 3 5/8 3 5/8 4 1/8 4 1/8 4 1/8 5 1/8
Table 6. Recommended Suction Line Sizes for R-404A, R-407C*

9
© 2015 Heatcraft Refrigeration Products, LLC
Capacity
20 Degrees 10 Degrees
25' 50' 75' 100' 150' 200' 250' 25' 50' 75' 100' 150' 200' 250'
1000 3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8
3000 3/8 3/8 3/8 1/2 1/2 1/2 1/2 3/8 3/8 1/2 1/2 1/2 1/2 1/2
4000 3/8 1/2 1/2 1/2 5/8 5/8 5/8 3/8 1/2 1/2 5/8 5/8 5/8 5/8
6000 ½ 1/2 1/2 5/8 5/8 5/8 5/8 1/2 1/2 5/8 5/8 5/8 5/8 5/8
9000 1/2 5/8 5/8 7/8 7/8 7/8 7/8 1/2 5/8 5/8 7/8 7/8 7/8 7/8
12000 5/8 5/8 7/8 7/8 7/8 7/8 7/8 5/8 7/8 7/8 7/8 7/8 7/8 7/8
15000 5/8 7/8 7/8 7/8 7/8 7/8 7/8 5/8 7/8 7/8 7/8 7/8 7/8 7/8
18000 5/8 7/8 7/8 7/8 7/8 7/8 7/8 7/8 7/8 7/8 7/8 1 1/8 1 1/8 1 1/8
24000 7/8 7/8 7/8 7/8 1 1/8 1 1/8 1 1/8 7/8 7/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8
30000 7/8 7/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 7/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8
36000 7/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8
42000 7/8 7/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 7/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8
48000 7/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 7/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8
54000 7/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 1 3/8
60000 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 1 3/8 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 1 3/8
66000 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 1 3/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 1 5/8 1 5/8
72000 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 1 5/8 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 1 5/8 1 5/8
78000 1 1/8 1 1/8 1 1/8 1 3/8 1 3/8 1 5/8 1 5/8 1 1/8 1 1/8 1 3/8 1 3/8 1 5/8 1 5/8 1 5/8
84000 1 1/8 1 1/8 1 3/8 1 3/8 1 5/8 1 5/8 1 5/8 1 1/8 1 3/8 1 3/8 1 3/8 1 5/8 1 5/8 1 5/8
90000 1 1/8 1 3/8 1 3/8 1 5/8 1 5/8 1 5/8 1 5/8 1 1/8 1 3/8 1 3/8 1 5/8 1 5/8 1 5/8 1 5/8
120000 1 3/8 1 3/8 1 5/8 1 5/8 1 5/8 2 1/8 2 1/8 1 3/8 1 5/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8
150000 1 3/8 1 5/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 1 3/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8
180000 1 3/8 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8
210000 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8
240000 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 5/8
300000 1 5/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 5/8
360000 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 5/8 2 1/8 2 1/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8
480000 2 1/8 2 5/8 2 5/8 2 5/8 3 1/8 3 1/8 3 1/8 2 1/8 2 5/8 2 5/8 3 1/8 3 1/8 3 1/8 3 1/8
600000 2 5/8 2 5/8 2 5/8 3 1/8 3 1/8 3 1/8 3 1/8 2 1/8 2 5/8 3 1/8 3 1/8 3 1/8 3 5/8 3 5/8
720000 2 5/8 2 5/8 3 1/8 3 1/8 3 5/8 3 5/8 3 5/8 2 5/8 3 1/8 3 1/8 3 1/8 3 5/8 3 5/8 3 5/8
900000 2 5/8 3 1/8 3 1/8 3 5/8 3 5/8 3 5/8 3 5/8 2 5/8 3 1/8 3 5/8 3 5/8 3 5/8 4 1/8 4 1/8
1200000 3 1/8 3 5/8 3 5/8 3 5/8 4 1/8 4 1/8 4 1/8 3 1/8 3 5/8 3 5/8 3 5/8 4 1/8 4 1/8 4 1/8
1400000 3 1/8 3 5/8 3 5/8 4 1/8 5 1/8 5 1/8 5 1/8 3 5/8 3 5/8 4 1/8 5 1/8 5 1/8 5 1/8 5 1/8
Table 7. Recommended Line Sizes for R-404A and R-407C*
* NOTES:
1. Sizes that are highlighted indicate maximum suction line sizes that should be used for risers. Riser size should not exceed horizontal size.
Properly placed suction traps must also be used for adequate oil return. All sizes shown are for O.D. Type L copper tubing.
2. Suction line sizes selected at pressure drop equivalent to 2˚F. Reduce estimate of system capacity accordingly.
3. If system load drops below 40% of design, consideration to installing double suction risers should be made.

10 © 2015 Heatcraft Refrigeration Products, LLC
Evacuation and Leak Detection
Due to the smaller molecule size of HFC’s, they will tend to leak more readily than
CFC’s. Consequently, it is of the utmost importance that proper system evacuation and
leak detection procedures be employed.
Manufacturer recommendation is a minimum of 500 micron evacuation. In addition,
a vacuum decay test is strongly recommended to assure there is not a large
pressure differential between the system and vacuum pump. Good evacuation
processes include frequent vacuum pump oil changes and large diameter, short hose
connections to both high and low sides of the system preferably using bronze braided
hose. Leak detection can be carried out in the conventional manner. If HCFC or CFC
tracer gas is used, care must be taken to completely remove all traces of the gas prior
to introducing HFC’s.
Electronic leak detectors are now available that will sense HFC’s. This is considered
preferable since it removes the possibility of chlorine remaining in the system after
leak testing with HCFC’s and/or CFC’s. There is a view that even small quantities of
chlorine may act as a catalyst encouraging copper plating and/or corrosion and should
therefore be avoided.
Leak Testing
After all lines are connected, the entire system must be leak tested. The complete
system should be pressurized to not more than 150 psig with refrigerant and
dry nitrogen (or dry CO2). The use of an electronic type leak detector is highly
recommended because of its greater sensitivity to small leaks. As a further check
it is recommended that this pressure be held for a minimum of 12 hours and then
rechecked. For a satisfactory installation, the system must be leak tight.
Line Insulation
After the nal leak test, refrigerant lines exposed to high ambient conditions should
be insulated to reduce heat pickup and prevent the formation of ash gas in the liquid
lines. Suction lines must always be insulated with 3/4" wall Armstrong “Armaex” or
equal. When required, Liquid lines should be insulated with 1/2 inch wall insulation or
better. The insulation located in outdoor environments should be protected from UV
exposure to prevent deterioration of insulating value.
Evacuation
A good, deep vacuum pump should be connected to both the low and high side
evacuation valves with copper tube or high vacuum hoses (1/4" ID minimum). If the
compressor has service valves, they should remain closed. A deep vacuum gauge
capable of registering pressure in microns should be attached to the system for
pressure readings.
A shut off valve between the gauge connection and vacuum pump should be provided
to allow the system pressure to be checked after evacuation. Do not turn off vacuum
pump when connected to an evacuated system before closing shut off valve.
The vacuum pump should be operated until a pressure of 1,500 microns absolute
pressure is reached — at which time the vacuum should be broken with the
refrigerant to be used in the system through a drier until the system pressure rises
above “0” psig.
Repeat this operation a second time.
Open the compressor service valves and evacuate the entire system to 500 microns
absolute pressure. Raise the pressure to 2 psig with the refrigerant and remove the
vacuum pump.
Refrigerant Charging Instructions
1. Install a liquid line drier in the refrigerant supply line between the
service gauge and the liquid service port of the receiver.
2. This extra drier will insure that all refrigerant supplied to the
system is clean and dry.
3. When initially charging a system that is in a vacuum, liquid
refrigerant can be added directly into the receiver tank.
4. Check equipment catalog for refrigerant capacity. System
refrigerant capacity is 90% of receiver capacity. Do not add more
refrigerant than the data tag indicates, unless the line run exceeds
25ft. Then, add additional refrigerant as per the chart on page 30.
Weigh the refrigerant drum before charging so an accurate record
can be kept of the weight of refrigerant put in the system.
5. Start the system and nish charging until the sight glass indicates
a full charge and the proper amount has been weighed in. If the
refrigerant must be added to the system through the
suction side of the compressor, charge in vapor form only. Liquid
charging must be done in the high side only or with
liquid metering devices to protect the compressor.
NOTE: R-407c should be introduced into the system as a liquid.
Field Wiring
The eld wiring should enter the areas as provided on the unit. The wiring diagram for
each unit is located on the inside of the electrical panel door. All eld wiring should
be done in a professional manner and in accordance with all governing codes. Before
operating unit, double check all wiring connections, including the factory terminals.
Factory connections can vibrate loose during shipment.
1. The serial data tag on the unit is marked with the electrical characteristic
for wiring the unit.
2. Consult the wiring diagram in the unit cooler and in the condensing unit
for proper connections.
3. Wire type should be of copper conductor only and of the proper
size to handle the connected load.
4. The unit must be grounded.
CAUTION: Do not use the refrigeration compressor to evacuate the
system. Do not start the compressor while it is in a vacuum.
WARNING: All wiring must be done in accordance with applicable
codes and local ordinances.
NOTE: Refrigerant used during evacuation cannot be vented. Reclaim all used
refrigerant. EPA regulations are constantly being updated. Ensure your procedure
follows correct regulations.

11
© 2015 Heatcraft Refrigeration Products, LLC
Check Out and Start Up
1. After the installation has been completed, the following points should be
covered before the system is placed in operation:
2. Check all electrical and refrigerant connections.
Be sure they are all tight.
3. Check compressor mounting fasteners for tightness.
4. Check microprocessor for operation of high and low pressure controls,
pressure regulating valves, oil pressure safety controls, and all other safety
controls, and adjust if necessary.
5. Wiring diagrams, instruction bulletins, etc., attached to the
condensing units should be read and led for future reference.
6. All fan motors should be checked for proper rotation. Fan
motor mounts should be carefully checked for tightness and
proper alignment.
7. Electric evaporator fan motors should
be temporarily wired for continuous operation until
the room temperature has stabilized.
8. Observe system pressures during charging and initial operation.
Do not add oil while the system is short of refrigerant
unless oil level is dangerously low.
9. Continue charging until system has sufcient refrigerant for
proper operation. Do not overcharge.
Remember that bubbles in a sight glass may be caused by
a restriction as well as a shortage of refrigerant.
10. Do not leave unit unattended until the system has
reached normal operating conditions and the oil
charge has been properly adjusted to maintain the oil
within lower sight glass range.
11. Make sure all Schrader valve caps are in place and tight.
12. Make sure ALL service valves are properly back-seated and tighten
valve packing if necessary.
Operational Check Out
After the system has been charged and has operated for at least two hours at normal
operating conditions without any indication of malfunction, it should be allowed to
operate overnight on automatic controls. Then a thorough recheck of the entire system
operation should be made as follows:
1. Check compressor discharge and suction pressures. If not within system
design limits, determine why and take corrective action.
2. Check liquid line sight glass and expansion valve operation. If there are
indications that more refrigerant is required, leak test all connections and
system components and repair any leaks before adding refrigerant.
3. Observe oil level in compressor crankcase sight glass. Add oil as
within lower sight glass range.
4. Thermostatic expansion valves must be checked for proper superheat settings.
Feeler bulbs must be in positive contact with the suction line and should
be insulated. Valves set at high superheat will lower refrigeration capacity. Low
superheat promotes liquid slugging and compressor bearing washout.
5. Using suitable instruments, carefully check line voltage and amperage at the
compressor terminals. Voltage must be within 10% of that indicated on the
condensing unit nameplate. If high or low voltage is indicated, notify the power
company. If amperage draw is excessive, immediately determine the cause
and take corrective action. On three phase motor compressors,
check to see that a balanced load is drawn by each phase.
6. The maximum approved settings for high pressure controls on
our air cooled condensing equipment is 425 psig. On air cooled
systems, check as follows:
Disconnect the fan motors or block the condenser inlet air. Watch
high pressure gauge for cutout point. Recheck all safety and
operating controls for proper operation and adjust if necessary.
7. Check drain pan for proper drainage.
8. Check winter head pressure controls for pressure setting.
9. Check oil sump heater operation
10. Install instruction card and control system diagram for use of building manager
or owner.
System Balancing - Compressor Superheat
IMPORTANT: In order to obtain the maximum capacity from a system, and to ensure
trouble-free operation, it is necessary to balance each and every system.
This is extremely important with any refrigeration system.
The critical value which must be checked is suction superheat.
Suction superheat should be checked at the compressor as follows:
1. Measure the suction pressure at the suction service valve of the compressor
and determine the saturation temperature corresponding to this pressure from
a “Temperature-Pressure” chart.
2. Measure the suction temperature of the suction line about one foot back from
the compressor using an accurate thermometer.
3. Subtract the saturated temperature from the actual suction line temperature.
The difference is superheat.
Too low a suction superheat can result in liquid being returned to the compressor. This
will cause dilution of the oil and eventual failure of the bearings.
Too high a suction superheat will result in excessive discharge temperatures which
cause a break down of the oil and results in wear, and damage.
It should also be remembered that the system capacity decreases as the suction
superheat increases. For maximum system capacity, suction superheat should be
kept as low as is practical. We recommend that the superheat at the compressor be
between 5˚F and 15˚F.
If adjustments to the suction superheat need to be made, the expansion valve at the
evaporator should be adjusted.
CAUTION: Check phase rotation with phase meter prior to rst start.
Warranty will be denied if damage is a result of reverse rotation. Extreme care
must be taken in starting compressors for the rst time after system charging.
At this time, all of the oil and most of the refrigerant might be in the compressor
creating a condition which could cause compressor damage due to slugging.
Activating the crankcase heater for 24 hours prior to start-up is required.
NOTE: All adjustable controls and valves must be eld adjusted to meet
desired operation. There are no factory preset controls or valve adjustments.
This includes low pressure, high pressure, adjustable head pressure systems
and expansion valves.

12 © 2015 Heatcraft Refrigeration Products, LLC
General Sequence of Operation
1. At power up the Magnum will not start it’s algorithm until Set Point.23, POWER UP
DELAY, time has been satised.
2. At start up the MAGNUM veries the ‘NO RUN CAPACITY CONTROL STATES’.
3. If anyone of the ‘NO RUN CAPACITY CONTROL STATES’ is not satised, the follow-
ing sequence occurs:
a. All compressors are not allowed to run. Any running compressor which has
satised it’s minimum run time (set point # 64) will have its liquid line solenoid
turned off and the compressor turned off. (Pump down will occur if enabled).
b. The evaporator fan continues to run for 60 seconds (Set Point# 108 “PUMP
DELAY”) after the last compressor is turned off.
4. If all of the ‘NO RUN CAPACITY CONTROL STATES’ are satised, the capacity
control logic is now allowed to run to maintain the Supply Air Temperature
(or optionally Return or Zone Temperature) within the control zone dened by:
a. Set point #1 “CTL TARGET”
b. Set point #2 “CTL ZONE+”
c. Set point #3 “CTL ZONE-”
5. The Capacity control logic will increase or decrease the compressors
WANTED ON versus ACTUAL ON’ and maintain the compressors required.
Capacity control logic for loading & unloading the chiller is as follows:
a. If the Supply Air Temperature is above the control zone and the Supply Air
Temp. Rate of Change (ROC) is not indicating the supply air temperature is
already decreasing at a sufcient rate, the condensing unit’s capacity control
logic will ask for more capacity by adding to the “Steps Wanted On”
parameter. Once “Steps Wanted On” parameter has been increased the
capacity control logic has a time delay before allowing the “Steps Wanted
ON” to be increased again. The time delay is dependent on how far away the
temperature is from target. Set Points #25 ‘STEP SENSIT’ and Set Point #26
“STEP DELAY”
b. If the ROC indicates a sufcient decrease in Supply Air Temperature (ROC <
Set Point #27 “Mac Roc-”) the capacity control logic stops loading and holds
the current capacity.
c. If the supply air temperature is below the control zone, special logic functions
to keep the condensing unit’s within the control zone.
d. If the supply air temperature is below the control zone and if the Supply
Air Temp. Rate of Change (ROC) is not indicating the supply air temperature is
already increasing at a sufcient rate, the condensing unit’s capacity control
logic ask for less capacity by subtracting from the “Steps Wanted On”
parameter. Once “Step Wanted On” parameter has been decreased the
capacity control logic has a time delay before allowing the “Steps Wanted
On” to be decreased again. The time delay is dependant on how far away the
temperature is from target, Set Points #25 “STEP SENSIT” and Set Point #26
“STEP DELAY”
e. If the ROC is indicating a sufcient increase in Supply Air Temperature
(ROC < Set Point #27 “MAX ROC-” the capacity control logic stop in loading
and holds the current capacity.
6. Once it has been determined that a compressor is wanted on the MAGNUM
reviews the ‘NO RUN CIRCUIT CONTROL STATES’ to an available compressor,
MAGNUM software runs its compressor control logic every second starting with
the lead compressor. If a compressor is allowed to run (not locked out, tripped on
a safety or disabled by pump down and /or ow switches) and the MAGNUM
wants the compressor to run {“Steps Turned On is less than “Steps Wanted On”)
the compressor is started.
7. The condenser fan control logic runs once every second. Pumps and fans are
cycled based on the compressor(s) discharge pressure and Set Point #45 to #55,
depending on condenser type.
8. The Capacity State & Circuit Compressor State can be viewed via the ‘STATUS’
option under the ‘Menu” key on the MAGNUM keypad or using PC-Connect soft
ware on a Windows based computer.
CURRENT STATE OF THE CIRCUIT The display shows the current capacity of circuit (x) and how long we have
been at this level. By pressing the F2 you will go back to the Chiller state display OR F3 you will get addi-
tional information on this circuit.
CURRENT STATE OF THE PACKAGE (Press ‘Menu’, position arrows to ‘Status’ Press Enter key
The display show the current capacity of the package and how long we have been at this level.
By pressing the PG i you will get an additional information on each circuit.
ACTUAL DISPLAY
Ҋ
p






np














np
 


   
   
n p









  


   
   
 
DESCRIPTION
Ҋ
p






np














np
 


   
   
n p









  


   
   
 
ACTUAL DISPLAY
Ҋ
p






np














np
 


   
   
n p









  


   
   
 
DESCRIPTION
Ҋ
p






np














np
 


   
   
n p









  


   
   
 
)

13
© 2015 Heatcraft Refrigeration Products, LLC
CURRENT STATE OF THE CIRCUIT (cont.)
ACTUAL DISPLAY
Ҋ
p






np














np
 


   
   
n p









  


   
   
 
DESCRIPTION
9. The safeties (Comp no Stop, Phase Loss, Emergency Stop, High Sump Water
Temperature) are checked once every second. (All of the safeties are options
features). Once a safety has occurred the user is required to correct the problem
and reset the unit using the ‘Lckout RST’ from the Menu on the MAGNUM’s key
pad.
10. If the compressor relay output is turned on, either by computer or manual, the
compressor safeties are checked once every second. The following compressor
safeties are supported:
a. Low & Unsafe Suction Pressure
b. Low & Unsafe Differential Oil Pressure
c. Low & High Discharge Pressure
d. High Discharge, Oil and Motor Temperatures
e. Low & High Motor Ampere
f. No Compressor Proof
g. Freeze protection for split barrels units
Ҋ
p






np














np
 


   
   
n p









  


   
   
 

14 © 2015 Heatcraft Refrigeration Products, LLC
Pressing the Page Down button shows the next Circuit Status screen:
To reach the Main Menu press the Menu button after powering up.
Based on the highlighted menu option when the Enter key is pressed it will bring up one fo the following
screens.
MENU KEY
Pressing the Menu Key shows the following:
ACTUAL DISPLAY
GETTING STARTED MANUAL REVISION 2.4
Keypad Display Screens
To reach the Main Menu press the Menu button after powering up. Based on the highlighted menu option when the enter key ( ) is
pressed will bring up one of the following screens.
Menu Key
Pressing the
ACTUAL DISPLAY DESCRIPTION
Status
ACTUAL DISPLAY
Selecting the 'Status' menu option shows the following Chiller Status screen:
DESCRIPTION
Pressing the Page Down button shows the following Circuit Status screen:
ACTUAL DISPLAY DESCRIPTION
Pressing the Page Down button shows the next Circuit Status screen:
ACTUAL DISPLAY DESCRIPTION
09:56 Main Menu
-Status -Setpoints
-Outputs -Serv Tools
-Inputs -Lckout RST
-Alarms -Lckout ALM
-Graphs -Passwords
Help
HH:MM Screen Title
-Control Status Display -Active Setpoints Display
-Relay/Analog Display -Service Tools Display
-Sensor Input Display -Lockout Reset Display
-Alarm Display -Lockout Alarm Display
-Graphing Display -Password Display
Help
09:56 Unit 23/35
UNIT IS LOADED
002:26:18
WTD ACT WTD% DLY ROC
11 100% 300 0.0
TARG=27.0
PG PG
HH:MM CHILLER UNIT LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
WANTED ACTUAL WANTED% DELAY SLOPE
#STEPS #STEPS ACTUAL% NEXT CHG DIRECTION
TARGET SET POINT + TARGET RESET
Page Up Page Down
09:56 CMP #1 23/35
CMP IS HOLDING
002:26:18
SUCT DISC OPD MOTOR
44P 222P 156P 101%
33F 177F OK OK
PG PG
HH:MM CIRCUIT LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
SUCTION DISCHARGE OIL DIFFERENTIAL MOTOR
PRESSURE PRESSURE PRESSURE AMP %
TEMPERATURE TEMPERATURE STATUS STATUS
Page Up Page Down
09:55 CMP #1 45/54
CMP OFF/READY
000:00:42
SST SSH SCT DSH
38 16.9 97 79.2
PG PG
HH:MM CIRCUIT LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
SAT.SUCT. SUCT SHEAT SAT.COND. DISC SHEAT
TEMP TEMP TEMP TEMP
Page Up Page Down
DESCRIPTION
GETTING STARTED MANUAL REVISION 2.4
Keypad Display Screens
To reach the Main Menu press the Menu button after powering up. Based on the highlighted menu option when the enter key ( ) is
pressed will bring up one of the following screens.
Menu Key
Pressing the
ACTUAL DISPLAY DESCRIPTION
Status
ACTUAL DISPLAY
Selecting the 'Status' menu option shows the following Chiller Status screen:
DESCRIPTION
Pressing the Page Down button shows the following Circuit Status screen:
ACTUAL DISPLAY DESCRIPTION
Pressing the Page Down button shows the next Circuit Status screen:
ACTUAL DISPLAY DESCRIPTION
09:56 Main Menu
-Status -Setpoints
-Outputs -Serv Tools
-Inputs -Lckout RST
-Alarms -Lckout ALM
-Graphs -Passwords
Help
HH:MM Screen Title
-Control Status Display -Active Setpoints Display
-Relay/Analog Display -Service Tools Display
-Sensor Input Display -Lockout Reset Display
-Alarm Display -Lockout Alarm Display
-Graphing Display -Password Display
Help
09:56 Unit 23/35
UNIT IS LOADED
002:26:18
WTD ACT WTD% DLY ROC
11 100% 300 0.0
TARG=27.0
PG PG
HH:MM CHILLER UNIT LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
WANTED ACTUAL WANTED% DELAY SLOPE
#STEPS #STEPS ACTUAL% NEXT CHG DIRECTION
TARGET SET POINT + TARGET RESET
Page Up Page Down
09:56 CMP #1 23/35
CMP IS HOLDING
002:26:18
SUCT DISC OPD MOTOR
44P 222P 156P 101%
33F 177F OK OK
PG PG
HH:MM CIRCUIT LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
SUCTION DISCHARGE OIL DIFFERENTIAL MOTOR
PRESSURE PRESSURE PRESSURE AMP %
TEMPERATURE TEMPERATURE STATUS STATUS
Page Up Page Down
09:55 CMP #1 45/54
CMP OFF/READY
000:00:42
SST SSH SCT DSH
38 16.9 97 79.2
PG PG
HH:MM CIRCUIT LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
SAT.SUCT. SUCT SHEAT SAT.COND. DISC SHEAT
TEMP TEMP TEMP TEMP
Page Up Page Down
STATUS
Selecting the Status Menu option shows the following Chiller Status screen:
ACTUAL DISPLAY
GETTING STARTED MANUAL REVISION 2.4
Keypad Display Screens
To reach the Main Menu press the Menu button after powering up. Based on the highlighted menu option when the enter key ( ) is
pressed will bring up one of the following screens.
Menu Key
Pressing the
ACTUAL DISPLAY DESCRIPTION
Status
ACTUAL DISPLAY
Selecting the 'Status' menu option shows the following Chiller Status screen:
DESCRIPTION
Pressing the Page Down button shows the following Circuit Status screen:
ACTUAL DISPLAY DESCRIPTION
Pressing the Page Down button shows the next Circuit Status screen:
ACTUAL DISPLAY DESCRIPTION
09:56 Main Menu
-Status -Setpoints
-Outputs -Serv Tools
-Inputs -Lckout RST
-Alarms -Lckout ALM
-Graphs -Passwords
Help
HH:MM Screen Title
-Control Status Display -Active Setpoints Display
-Relay/Analog Display -Service Tools Display
-Sensor Input Display -Lockout Reset Display
-Alarm Display -Lockout Alarm Display
-Graphing Display -Password Display
Help
09:56 Unit 23/35
UNIT IS LOADED
002:26:18
WTD ACT WTD% DLY ROC
11 100% 300 0.0
TARG=27.0
PG PG
HH:MM CHILLER UNIT LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
WANTED ACTUAL WANTED% DELAY SLOPE
#STEPS #STEPS ACTUAL% NEXT CHG DIRECTION
TARGET SET POINT + TARGET RESET
Page Up Page Down
09:56 CMP #1 23/35
CMP IS HOLDING
002:26:18
SUCT DISC OPD MOTOR
44P 222P 156P 101%
33F 177F OK OK
PG PG
HH:MM CIRCUIT LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
SUCTION DISCHARGE OIL DIFFERENTIAL MOTOR
PRESSURE PRESSURE PRESSURE AMP %
TEMPERATURE TEMPERATURE STATUS STATUS
Page Up Page Down
09:55 CMP #1 45/54
CMP OFF/READY
000:00:42
SST SSH SCT DSH
38 16.9 97 79.2
PG PG
HH:MM CIRCUIT LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
SAT.SUCT. SUCT SHEAT SAT.COND. DISC SHEAT
TEMP TEMP TEMP TEMP
Page Up Page Down
DESCRIPTION
GETTING STARTED MANUAL REVISION 2.4
Keypad Display Screens
To reach the Main Menu press the Menu button after powering up. Based on the highlighted menu option when the enter key ( ) is
pressed will bring up one of the following screens.
Menu Key
Pressing the
ACTUAL DISPLAY DESCRIPTION
Status
ACTUAL DISPLAY
Selecting the 'Status' menu option shows the following Chiller Status screen:
DESCRIPTION
Pressing the Page Down button shows the following Circuit Status screen:
ACTUAL DISPLAY DESCRIPTION
Pressing the Page Down button shows the next Circuit Status screen:
ACTUAL DISPLAY DESCRIPTION
09:56 Main Menu
-Status -Setpoints
-Outputs -Serv Tools
-Inputs -Lckout RST
-Alarms -Lckout ALM
-Graphs -Passwords
Help
HH:MM Screen Title
-Control Status Display -Active Setpoints Display
-Relay/Analog Display -Service Tools Display
-Sensor Input Display -Lockout Reset Display
-Alarm Display -Lockout Alarm Display
-Graphing Display -Password Display
Help
09:56 Unit 23/35
UNIT IS LOADED
002:26:18
WTD ACT WTD% DLY ROC
11 100% 300 0.0
TARG=27.0
PG PG
HH:MM CHILLER UNIT LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
WANTED ACTUAL WANTED% DELAY SLOPE
#STEPS #STEPS ACTUAL% NEXT CHG DIRECTION
TARGET SET POINT + TARGET RESET
Page Up Page Down
09:56 CMP #1 23/35
CMP IS HOLDING
002:26:18
SUCT DISC OPD MOTOR
44P 222P 156P 101%
33F 177F OK OK
PG PG
HH:MM CIRCUIT LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
SUCTION DISCHARGE OIL DIFFERENTIAL MOTOR
PRESSURE PRESSURE PRESSURE AMP %
TEMPERATURE TEMPERATURE STATUS STATUS
Page Up Page Down
09:55 CMP #1 45/54
CMP OFF/READY
000:00:42
SST SSH SCT DSH
38 16.9 97 79.2
PG PG
HH:MM CIRCUIT LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
SAT.SUCT. SUCT SHEAT SAT.COND. DISC SHEAT
TEMP TEMP TEMP TEMP
Page Up Page Down
Pressing the Page Down button shows the following Circuit Status screen:
ACTUAL DISPLAY
GETTING STARTED MANUAL REVISION 2.4
Keypad Display Screens
To reach the Main Menu press the Menu button after powering up. Based on the highlighted menu option when the enter key ( ) is
pressed will bring up one of the following screens.
Menu Key
Pressing the
ACTUAL DISPLAY DESCRIPTION
Status
ACTUAL DISPLAY
Selecting the 'Status' menu option shows the following Chiller Status screen:
DESCRIPTION
Pressing the Page Down button shows the following Circuit Status screen:
ACTUAL DISPLAY DESCRIPTION
Pressing the Page Down button shows the next Circuit Status screen:
ACTUAL DISPLAY DESCRIPTION
09:56 Main Menu
-Status -Setpoints
-Outputs -Serv Tools
-Inputs -Lckout RST
-Alarms -Lckout ALM
-Graphs -Passwords
Help
HH:MM Screen Title
-Control Status Display -Active Setpoints Display
-Relay/Analog Display -Service Tools Display
-Sensor Input Display -Lockout Reset Display
-Alarm Display -Lockout Alarm Display
-Graphing Display -Password Display
Help
09:56 Unit 23/35
UNIT IS LOADED
002:26:18
WTD ACT WTD% DLY ROC
11 100% 300 0.0
TARG=27.0
PG PG
HH:MM CHILLER UNIT LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
WANTED ACTUAL WANTED% DELAY SLOPE
#STEPS #STEPS ACTUAL% NEXT CHG DIRECTION
TARGET SET POINT + TARGET RESET
Page Up Page Down
09:56 CMP #1 23/35
CMP IS HOLDING
002:26:18
SUCT DISC OPD MOTOR
44P 222P 156P 101%
33F 177F OK OK
PG PG
HH:MM CIRCUIT LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
SUCTION DISCHARGE OIL DIFFERENTIAL MOTOR
PRESSURE PRESSURE PRESSURE AMP %
TEMPERATURE TEMPERATURE STATUS STATUS
Page Up Page Down
09:55 CMP #1 45/54
CMP OFF/READY
000:00:42
SST SSH SCT DSH
38 16.9 97 79.2
PG PG
HH:MM CIRCUIT LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
SAT.SUCT. SUCT SHEAT SAT.COND. DISC SHEAT
TEMP TEMP TEMP TEMP
Page Up Page Down
DESCRIPTION
GETTING STARTED MANUAL REVISION 2.4
Keypad Display Screens
To reach the Main Menu press the Menu button after powering up. Based on the highlighted menu option when the enter key ( ) is
pressed will bring up one of the following screens.
Menu Key
Pressing the
ACTUAL DISPLAY DESCRIPTION
Status
ACTUAL DISPLAY
Selecting the 'Status' menu option shows the following Chiller Status screen:
DESCRIPTION
Pressing the Page Down button shows the following Circuit Status screen:
ACTUAL DISPLAY DESCRIPTION
Pressing the Page Down button shows the next Circuit Status screen:
ACTUAL DISPLAY DESCRIPTION
09:56 Main Menu
-Status -Setpoints
-Outputs -Serv Tools
-Inputs -Lckout RST
-Alarms -Lckout ALM
-Graphs -Passwords
Help
HH:MM Screen Title
-Control Status Display -Active Setpoints Display
-Relay/Analog Display -Service Tools Display
-Sensor Input Display -Lockout Reset Display
-Alarm Display -Lockout Alarm Display
-Graphing Display -Password Display
Help
09:56 Unit 23/35
UNIT IS LOADED
002:26:18
WTD ACT WTD% DLY ROC
11 100% 300 0.0
TARG=27.0
PG PG
HH:MM CHILLER UNIT LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
WANTED ACTUAL WANTED% DELAY SLOPE
#STEPS #STEPS ACTUAL% NEXT CHG DIRECTION
TARGET SET POINT + TARGET RESET
Page Up Page Down
09:56 CMP #1 23/35
CMP IS HOLDING
002:26:18
SUCT DISC OPD MOTOR
44P 222P 156P 101%
33F 177F OK OK
PG PG
HH:MM CIRCUIT LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
SUCTION DISCHARGE OIL DIFFERENTIAL MOTOR
PRESSURE PRESSURE PRESSURE AMP %
TEMPERATURE TEMPERATURE STATUS STATUS
Page Up Page Down
09:55 CMP #1 45/54
CMP OFF/READY
000:00:42
SST SSH SCT DSH
38 16.9 97 79.2
PG PG
HH:MM CIRCUIT LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
SAT.SUCT. SUCT SHEAT SAT.COND. DISC SHEAT
TEMP TEMP TEMP TEMP
Page Up Page Down
ACTUAL DISPLAY
GETTING STARTED MANUAL REVISION 2.4
Keypad Display Screens
To reach the Main Menu press the Menu button after powering up. Based on the highlighted menu option when the enter key ( ) is
pressed will bring up one of the following screens.
Menu Key
Pressing the
ACTUAL DISPLAY DESCRIPTION
Status
ACTUAL DISPLAY
Selecting the 'Status' menu option shows the following Chiller Status screen:
DESCRIPTION
Pressing the Page Down button shows the following Circuit Status screen:
ACTUAL DISPLAY DESCRIPTION
Pressing the Page Down button shows the next Circuit Status screen:
ACTUAL DISPLAY DESCRIPTION
09:56 Main Menu
-Status -Setpoints
-Outputs -Serv Tools
-Inputs -Lckout RST
-Alarms -Lckout ALM
-Graphs -Passwords
Help
HH:MM Screen Title
-Control Status Display -Active Setpoints Display
-Relay/Analog Display -Service Tools Display
-Sensor Input Display -Lockout Reset Display
-Alarm Display -Lockout Alarm Display
-Graphing Display -Password Display
Help
09:56 Unit 23/35
UNIT IS LOADED
002:26:18
WTD ACT WTD% DLY ROC
11 100% 300 0.0
TARG=27.0
PG PG
HH:MM CHILLER UNIT LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
WANTED ACTUAL WANTED% DELAY SLOPE
#STEPS #STEPS ACTUAL% NEXT CHG DIRECTION
TARGET SET POINT + TARGET RESET
Page Up Page Down
09:56 CMP #1 23/35
CMP IS HOLDING
002:26:18
SUCT DISC OPD MOTOR
44P 222P 156P 101%
33F 177F OK OK
PG PG
HH:MM CIRCUIT LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
SUCTION DISCHARGE OIL DIFFERENTIAL MOTOR
PRESSURE PRESSURE PRESSURE AMP %
TEMPERATURE TEMPERATURE STATUS STATUS
Page Up Page Down
09:55 CMP #1 45/54
CMP OFF/READY
000:00:42
SST SSH SCT DSH
38 16.9 97 79.2
PG PG
HH:MM CIRCUIT LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
SAT.SUCT. SUCT SHEAT SAT.COND. DISC SHEAT
TEMP TEMP TEMP TEMP
Page Up Page Down
DESCRIPTION
GETTING STARTED MANUAL REVISION 2.4
Keypad Display Screens
To reach the Main Menu press the Menu button after powering up. Based on the highlighted menu option when the enter key ( ) is
pressed will bring up one of the following screens.
Menu Key
Pressing the
ACTUAL DISPLAY DESCRIPTION
Status
ACTUAL DISPLAY
Selecting the 'Status' menu option shows the following Chiller Status screen:
DESCRIPTION
Pressing the Page Down button shows the following Circuit Status screen:
ACTUAL DISPLAY DESCRIPTION
Pressing the Page Down button shows the next Circuit Status screen:
ACTUAL DISPLAY DESCRIPTION
09:56 Main Menu
-Status -Setpoints
-Outputs -Serv Tools
-Inputs -Lckout RST
-Alarms -Lckout ALM
-Graphs -Passwords
Help
HH:MM Screen Title
-Control Status Display -Active Setpoints Display
-Relay/Analog Display -Service Tools Display
-Sensor Input Display -Lockout Reset Display
-Alarm Display -Lockout Alarm Display
-Graphing Display -Password Display
Help
09:56 Unit 23/35
UNIT IS LOADED
002:26:18
WTD ACT WTD% DLY ROC
11 100% 300 0.0
TARG=27.0
PG PG
HH:MM CHILLER UNIT LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
WANTED ACTUAL WANTED% DELAY SLOPE
#STEPS #STEPS ACTUAL% NEXT CHG DIRECTION
TARGET SET POINT + TARGET RESET
Page Up Page Down
09:56 CMP #1 23/35
CMP IS HOLDING
002:26:18
SUCT DISC OPD MOTOR
44P 222P 156P 101%
33F 177F OK OK
PG PG
HH:MM CIRCUIT LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
SUCTION DISCHARGE OIL DIFFERENTIAL MOTOR
PRESSURE PRESSURE PRESSURE AMP %
TEMPERATURE TEMPERATURE STATUS STATUS
Page Up Page Down
09:55 CMP #1 45/54
CMP OFF/READY
000:00:42
SST SSH SCT DSH
38 16.9 97 79.2
PG PG
HH:MM CIRCUIT LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
SAT.SUCT. SUCT SHEAT SAT.COND. DISC SHEAT
TEMP TEMP TEMP TEMP
Page Up Page Down

15
© 2015 Heatcraft Refrigeration Products, LLC
OUTPUTS
Selecting the Outputs Menu option shows the rst 4 Relay Outputs:
ACTUAL DISPLAY
GETTING STARTED MANUAL REVISION 2.4
Pressing the Page Down button shows the following Liquid Line Solenoid Status screen:
ACTUAL DISPLAY DESCRIPTION
Outputs
ACTUAL DISPLAY DESCRIPTION
Pressing the Page Down button shows the next 4 Relay Outputs:
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the Output screens. Inputs
ACTUAL DISPLAY DESCRIPTION
09:56 Outputs
Relays Status
M-1 COMP Lck Off
M-2 LOAD Lck Off
M-3 UNLOAD Lck Off
M-4 LLS 1 Lck Off
Anlog PG PG
HH:MM Screen Title Left/Right Arrow
RO position & names Current status of RO
Using the Left and Right arrow buttons allows user to view all
Status, Last On, Last Off, Run Time
Today, Cycles Today, Run Time Yesterday, Cycles Yesterday,
Total Run Hours, and Total Cycles)
09:56 Inputs
Sensor Value
M-1 SUCT PSI 66.0P
M-2 DISC PSI 121.3P
M-3 SPAREM-3 ----
M-4 AMPS 52.3A
PG PG
HH:MM Screen Title Left/Right Arrow
SI position & names Current status of SI
(Value, Type, Last On, Last Off, Max Value Today, Min Value Today, Run
Time Today, Average Value Today, Cycles Today, Run Time Yesterday, Max
Value Yesterday, Cycles Yesterday, Min Value Yesterday, Total Run Hours,
Average Value Yesterday, and Total Cycles)
Page up Page down
09:56 Outputs
Relays Status
M-5 LIQ INJ On
M-6 HOT GAS On
M-7 LLS 2 On
M-8 SUBCOOLER On
Anlog PG PG
HH:MM Screen Title Left/Right Arrow
RO position & names Current status of RO
Using the Left and Right arrow buttons allows user to view all
Status, Last On, Last Off, Run Time
Today, Cycles Today, Run Time Yesterday, Cycles Yesterday,
Total Run Hours, and Total Cycles)
09:55 LLS #1 45/54
IS HOLDING
002:43:42
Suction Info
PRES SST TEMP SSH
14.0P 60F 12F 47.0
PG PG
HH:MM LIQUID LINE SOLENOID LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
SUCTION SAT.SUCT. SUCTION SUCT.SHEAT.
PRESSURE TEMP TEMP TEMP
Page Up Page Down
Selecting the 'Outputs' menu option shows the first 4 Relay Outputs:
Selecting the 'Inputs' menu option shows the first 4 Sensor Inputs:
DESCRIPTION
GETTING STARTED MANUAL REVISION 2.4
Pressing the Page Down button shows the following Liquid Line Solenoid Status screen:
ACTUAL DISPLAY DESCRIPTION
Outputs
ACTUAL DISPLAY DESCRIPTION
Pressing the Page Down button shows the next 4 Relay Outputs:
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the Output screens. Inputs
ACTUAL DISPLAY DESCRIPTION
09:56 Outputs
Relays Status
M-1 COMP Lck Off
M-2 LOAD Lck Off
M-3 UNLOAD Lck Off
M-4 LLS 1 Lck Off
Anlog PG PG
HH:MM Screen Title Left/Right Arrow
RO position & names Current status of RO
Using the Left and Right arrow buttons allows user to view all
Status, Last On, Last Off, Run Time
Today, Cycles Today, Run Time Yesterday, Cycles Yesterday,
Total Run Hours, and Total Cycles)
09:56 Inputs
Sensor Value
M-1 SUCT PSI 66.0P
M-2 DISC PSI 121.3P
M-3 SPAREM-3 ----
M-4 AMPS 52.3A
PG PG
HH:MM Screen Title Left/Right Arrow
SI position & names Current status of SI
(Value, Type, Last On, Last Off, Max Value Today, Min Value Today, Run
Time Today, Average Value Today, Cycles Today, Run Time Yesterday, Max
Value Yesterday, Cycles Yesterday, Min Value Yesterday, Total Run Hours,
Average Value Yesterday, and Total Cycles)
Page up Page down
09:56 Outputs
Relays Status
M-5 LIQ INJ On
M-6 HOT GAS On
M-7 LLS 2 On
M-8 SUBCOOLER On
Anlog PG PG
HH:MM Screen Title Left/Right Arrow
RO position & names Current status of RO
Using the Left and Right arrow buttons allows user to view all
Status, Last On, Last Off, Run Time
Today, Cycles Today, Run Time Yesterday, Cycles Yesterday,
Total Run Hours, and Total Cycles)
09:55 LLS #1 45/54
IS HOLDING
002:43:42
Suction Info
PRES SST TEMP SSH
14.0P 60F 12F 47.0
PG PG
HH:MM LIQUID LINE SOLENOID LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
SUCTION SAT.SUCT. SUCTION SUCT.SHEAT.
PRESSURE TEMP TEMP TEMP
Page Up Page Down
Selecting the 'Outputs' menu option shows the first 4 Relay Outputs:
Selecting the 'Inputs' menu option shows the first 4 Sensor Inputs:
ACTUAL DISPLAY
GETTING STARTED MANUAL REVISION 2.4
Pressing the Page Down button shows the following Liquid Line Solenoid Status screen:
ACTUAL DISPLAY DESCRIPTION
Outputs
ACTUAL DISPLAY DESCRIPTION
Pressing the Page Down button shows the next 4 Relay Outputs:
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the Output screens. Inputs
ACTUAL DISPLAY DESCRIPTION
09:56 Outputs
Relays Status
M-1 COMP Lck Off
M-2 LOAD Lck Off
M-3 UNLOAD Lck Off
M-4 LLS 1 Lck Off
Anlog PG PG
HH:MM Screen Title Left/Right Arrow
RO position & names Current status of RO
Using the Left and Right arrow buttons allows user to view all
Status, Last On, Last Off, Run Time
Today, Cycles Today, Run Time Yesterday, Cycles Yesterday,
Total Run Hours, and Total Cycles)
09:56 Inputs
Sensor Value
M-1 SUCT PSI 66.0P
M-2 DISC PSI 121.3P
M-3 SPAREM-3 ----
M-4 AMPS 52.3A
PG PG
HH:MM Screen Title Left/Right Arrow
SI position & names Current status of SI
(Value, Type, Last On, Last Off, Max Value Today, Min Value Today, Run
Time Today, Average Value Today, Cycles Today, Run Time Yesterday, Max
Value Yesterday, Cycles Yesterday, Min Value Yesterday, Total Run Hours,
Average Value Yesterday, and Total Cycles)
Page up Page down
09:56 Outputs
Relays Status
M-5 LIQ INJ On
M-6 HOT GAS On
M-7 LLS 2 On
M-8 SUBCOOLER On
Anlog PG PG
HH:MM Screen Title Left/Right Arrow
RO position & names Current status of RO
Using the Left and Right arrow buttons allows user to view all
Status, Last On, Last Off, Run Time
Today, Cycles Today, Run Time Yesterday, Cycles Yesterday,
Total Run Hours, and Total Cycles)
09:55 LLS #1 45/54
IS HOLDING
002:43:42
Suction Info
PRES SST TEMP SSH
14.0P 60F 12F 47.0
PG PG
HH:MM LIQUID LINE SOLENOID LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
SUCTION SAT.SUCT. SUCTION SUCT.SHEAT.
PRESSURE TEMP TEMP TEMP
Page Up Page Down
Selecting the 'Outputs' menu option shows the first 4 Relay Outputs:
Selecting the 'Inputs' menu option shows the first 4 Sensor Inputs:
DESCRIPTION
GETTING STARTED MANUAL REVISION 2.4
Pressing the Page Down button shows the following Liquid Line Solenoid Status screen:
ACTUAL DISPLAY DESCRIPTION
Outputs
ACTUAL DISPLAY DESCRIPTION
Pressing the Page Down button shows the next 4 Relay Outputs:
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the Output screens. Inputs
ACTUAL DISPLAY DESCRIPTION
09:56 Outputs
Relays Status
M-1 COMP Lck Off
M-2 LOAD Lck Off
M-3 UNLOAD Lck Off
M-4 LLS 1 Lck Off
Anlog PG PG
HH:MM Screen Title Left/Right Arrow
RO position & names Current status of RO
Using the Left and Right arrow buttons allows user to view all
Status, Last On, Last Off, Run Time
Today, Cycles Today, Run Time Yesterday, Cycles Yesterday,
Total Run Hours, and Total Cycles)
09:56 Inputs
Sensor Value
M-1 SUCT PSI 66.0P
M-2 DISC PSI 121.3P
M-3 SPAREM-3 ----
M-4 AMPS 52.3A
PG PG
HH:MM Screen Title Left/Right Arrow
SI position & names Current status of SI
(Value, Type, Last On, Last Off, Max Value Today, Min Value Today, Run
Time Today, Average Value Today, Cycles Today, Run Time Yesterday, Max
Value Yesterday, Cycles Yesterday, Min Value Yesterday, Total Run Hours,
Average Value Yesterday, and Total Cycles)
Page up Page down
09:56 Outputs
Relays Status
M-5 LIQ INJ On
M-6 HOT GAS On
M-7 LLS 2 On
M-8 SUBCOOLER On
Anlog PG PG
HH:MM Screen Title Left/Right Arrow
RO position & names Current status of RO
Using the Left and Right arrow buttons allows user to view all
Status, Last On, Last Off, Run Time
Today, Cycles Today, Run Time Yesterday, Cycles Yesterday,
Total Run Hours, and Total Cycles)
09:55 LLS #1 45/54
IS HOLDING
002:43:42
Suction Info
PRES SST TEMP SSH
14.0P 60F 12F 47.0
PG PG
HH:MM LIQUID LINE SOLENOID LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
SUCTION SAT.SUCT. SUCTION SUCT.SHEAT.
PRESSURE TEMP TEMP TEMP
Page Up Page Down
Selecting the 'Outputs' menu option shows the first 4 Relay Outputs:
Selecting the 'Inputs' menu option shows the first 4 Sensor Inputs:
Pressing the Page Down button shows the next 4 Relay Outputs:
ACTUAL DISPLAY
GETTING STARTED MANUAL REVISION 2.4
Pressing the Page Down button shows the following Liquid Line Solenoid Status screen:
ACTUAL DISPLAY DESCRIPTION
Outputs
ACTUAL DISPLAY DESCRIPTION
Pressing the Page Down button shows the next 4 Relay Outputs:
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the Output screens. Inputs
ACTUAL DISPLAY DESCRIPTION
09:56 Outputs
Relays Status
M-1 COMP Lck Off
M-2 LOAD Lck Off
M-3 UNLOAD Lck Off
M-4 LLS 1 Lck Off
Anlog PG PG
HH:MM Screen Title Left/Right Arrow
RO position & names Current status of RO
Using the Left and Right arrow buttons allows user to view all
Status, Last On, Last Off, Run Time
Today, Cycles Today, Run Time Yesterday, Cycles Yesterday,
Total Run Hours, and Total Cycles)
09:56 Inputs
Sensor Value
M-1 SUCT PSI 66.0P
M-2 DISC PSI 121.3P
M-3 SPAREM-3 ----
M-4 AMPS 52.3A
PG PG
HH:MM Screen Title Left/Right Arrow
SI position & names Current status of SI
(Value, Type, Last On, Last Off, Max Value Today, Min Value Today, Run
Time Today, Average Value Today, Cycles Today, Run Time Yesterday, Max
Value Yesterday, Cycles Yesterday, Min Value Yesterday, Total Run Hours,
Average Value Yesterday, and Total Cycles)
Page up Page down
09:56 Outputs
Relays Status
M-5 LIQ INJ On
M-6 HOT GAS On
M-7 LLS 2 On
M-8 SUBCOOLER On
Anlog PG PG
HH:MM Screen Title Left/Right Arrow
RO position & names Current status of RO
Using the Left and Right arrow buttons allows user to view all
Status, Last On, Last Off, Run Time
Today, Cycles Today, Run Time Yesterday, Cycles Yesterday,
Total Run Hours, and Total Cycles)
09:55 LLS #1 45/54
IS HOLDING
002:43:42
Suction Info
PRES SST TEMP SSH
14.0P 60F 12F 47.0
PG PG
HH:MM LIQUID LINE SOLENOID LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
SUCTION SAT.SUCT. SUCTION SUCT.SHEAT.
PRESSURE TEMP TEMP TEMP
Page Up Page Down
Selecting the 'Outputs' menu option shows the first 4 Relay Outputs:
Selecting the 'Inputs' menu option shows the first 4 Sensor Inputs:
DESCRIPTION
GETTING STARTED MANUAL REVISION 2.4
Pressing the Page Down button shows the following Liquid Line Solenoid Status screen:
ACTUAL DISPLAY DESCRIPTION
Outputs
ACTUAL DISPLAY DESCRIPTION
Pressing the Page Down button shows the next 4 Relay Outputs:
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the Output screens. Inputs
ACTUAL DISPLAY DESCRIPTION
09:56 Outputs
Relays Status
M-1 COMP Lck Off
M-2 LOAD Lck Off
M-3 UNLOAD Lck Off
M-4 LLS 1 Lck Off
Anlog PG PG
HH:MM Screen Title Left/Right Arrow
RO position & names Current status of RO
Using the Left and Right arrow buttons allows user to view all
Status, Last On, Last Off, Run Time
Today, Cycles Today, Run Time Yesterday, Cycles Yesterday,
Total Run Hours, and Total Cycles)
09:56 Inputs
Sensor Value
M-1 SUCT PSI 66.0P
M-2 DISC PSI 121.3P
M-3 SPAREM-3 ----
M-4 AMPS 52.3A
PG PG
HH:MM Screen Title Left/Right Arrow
SI position & names Current status of SI
(Value, Type, Last On, Last Off, Max Value Today, Min Value Today, Run
Time Today, Average Value Today, Cycles Today, Run Time Yesterday, Max
Value Yesterday, Cycles Yesterday, Min Value Yesterday, Total Run Hours,
Average Value Yesterday, and Total Cycles)
Page up Page down
09:56 Outputs
Relays Status
M-5 LIQ INJ On
M-6 HOT GAS On
M-7 LLS 2 On
M-8 SUBCOOLER On
Anlog PG PG
HH:MM Screen Title Left/Right Arrow
RO position & names Current status of RO
Using the Left and Right arrow buttons allows user to view all
Status, Last On, Last Off, Run Time
Today, Cycles Today, Run Time Yesterday, Cycles Yesterday,
Total Run Hours, and Total Cycles)
09:55 LLS #1 45/54
IS HOLDING
002:43:42
Suction Info
PRES SST TEMP SSH
14.0P 60F 12F 47.0
PG PG
HH:MM LIQUID LINE SOLENOID LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
SUCTION SAT.SUCT. SUCTION SUCT.SHEAT.
PRESSURE TEMP TEMP TEMP
Page Up Page Down
Selecting the 'Outputs' menu option shows the first 4 Relay Outputs:
Selecting the 'Inputs' menu option shows the first 4 Sensor Inputs:
Continue pressing the Page Down or Page Up buttons to scroll through all the Output screens.
INPUTS
Selecting the Inputs Menu option shows the rst 4 Sensor Outputs:
ACTUAL DISPLAY
GETTING STARTED MANUAL REVISION 2.4
Pressing the Page Down button shows the following Liquid Line Solenoid Status screen:
ACTUAL DISPLAY DESCRIPTION
Outputs
ACTUAL DISPLAY DESCRIPTION
Pressing the Page Down button shows the next 4 Relay Outputs:
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the Output screens. Inputs
ACTUAL DISPLAY DESCRIPTION
09:56 Outputs
Relays Status
M-1 COMP Lck Off
M-2 LOAD Lck Off
M-3 UNLOAD Lck Off
M-4 LLS 1 Lck Off
Anlog PG PG
HH:MM Screen Title Left/Right Arrow
RO position & names Current status of RO
Using the Left and Right arrow buttons allows user to view all
Status, Last On, Last Off, Run Time
Today, Cycles Today, Run Time Yesterday, Cycles Yesterday,
Total Run Hours, and Total Cycles)
09:56 Inputs
Sensor Value
M-1 SUCT PSI 66.0P
M-2 DISC PSI 121.3P
M-3 SPAREM-3 ----
M-4 AMPS 52.3A
PG PG
HH:MM Screen Title Left/Right Arrow
SI position & names Current status of SI
(Value, Type, Last On, Last Off, Max Value Today, Min Value Today, Run
Time Today, Average Value Today, Cycles Today, Run Time Yesterday, Max
Value Yesterday, Cycles Yesterday, Min Value Yesterday, Total Run Hours,
Average Value Yesterday, and Total Cycles)
Page up Page down
09:56 Outputs
Relays Status
M-5 LIQ INJ On
M-6 HOT GAS On
M-7 LLS 2 On
M-8 SUBCOOLER On
Anlog PG PG
HH:MM Screen Title Left/Right Arrow
RO position & names Current status of RO
Using the Left and Right arrow buttons allows user to view all
Status, Last On, Last Off, Run Time
Today, Cycles Today, Run Time Yesterday, Cycles Yesterday,
Total Run Hours, and Total Cycles)
09:55 LLS #1 45/54
IS HOLDING
002:43:42
Suction Info
PRES SST TEMP SSH
14.0P 60F 12F 47.0
PG PG
HH:MM LIQUID LINE SOLENOID LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
SUCTION SAT.SUCT. SUCTION SUCT.SHEAT.
PRESSURE TEMP TEMP TEMP
Page Up Page Down
Selecting the 'Outputs' menu option shows the first 4 Relay Outputs:
Selecting the 'Inputs' menu option shows the first 4 Sensor Inputs:
DESCRIPTION
GETTING STARTED MANUAL REVISION 2.4
Pressing the Page Down button shows the following Liquid Line Solenoid Status screen:
ACTUAL DISPLAY DESCRIPTION
Outputs
ACTUAL DISPLAY DESCRIPTION
Pressing the Page Down button shows the next 4 Relay Outputs:
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the Output screens. Inputs
ACTUAL DISPLAY DESCRIPTION
09:56 Outputs
Relays Status
M-1 COMP Lck Off
M-2 LOAD Lck Off
M-3 UNLOAD Lck Off
M-4 LLS 1 Lck Off
Anlog PG PG
HH:MM Screen Title Left/Right Arrow
RO position & names Current status of RO
Using the Left and Right arrow buttons allows user to view all
Status, Last On, Last Off, Run Time
Today, Cycles Today, Run Time Yesterday, Cycles Yesterday,
Total Run Hours, and Total Cycles)
09:56 Inputs
Sensor Value
M-1 SUCT PSI 66.0P
M-2 DISC PSI 121.3P
M-3 SPAREM-3 ----
M-4 AMPS 52.3A
PG PG
HH:MM Screen Title Left/Right Arrow
SI position & names Current status of SI
(Value, Type, Last On, Last Off, Max Value Today, Min Value Today, Run
Time Today, Average Value Today, Cycles Today, Run Time Yesterday, Max
Value Yesterday, Cycles Yesterday, Min Value Yesterday, Total Run Hours,
Average Value Yesterday, and Total Cycles)
Page up Page down
09:56 Outputs
Relays Status
M-5 LIQ INJ On
M-6 HOT GAS On
M-7 LLS 2 On
M-8 SUBCOOLER On
Anlog PG PG
HH:MM Screen Title Left/Right Arrow
RO position & names Current status of RO
Using the Left and Right arrow buttons allows user to view all
Status, Last On, Last Off, Run Time
Today, Cycles Today, Run Time Yesterday, Cycles Yesterday,
Total Run Hours, and Total Cycles)
09:55 LLS #1 45/54
IS HOLDING
002:43:42
Suction Info
PRES SST TEMP SSH
14.0P 60F 12F 47.0
PG PG
HH:MM LIQUID LINE SOLENOID LEV/ENT
CURRENT CONTROL STATE
TIME IN CURRENT STATE
SUCTION SAT.SUCT. SUCTION SUCT.SHEAT.
PRESSURE TEMP TEMP TEMP
Page Up Page Down
Selecting the 'Outputs' menu option shows the first 4 Relay Outputs:
Selecting the 'Inputs' menu option shows the first 4 Sensor Inputs:

16 © 2015 Heatcraft Refrigeration Products, LLC
ACTUAL DISPLAY DESCRIPTION
GETTING STARTED MANUAL REVISION 2.4
Pressing the Page Down button shows the next 4 Sensor Inputs:
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the Input screens. Alarms
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the Alarm screens. Graphs
ACTUAL DISPLAY DESCRIPTION
Setpoints
ACTUAL DISPLAY DESCRIPTION
09:56 Alarms
1 LOST RO COMM #2
JUL 04 12:09:16
2 LOST RO COMM #1
JUL 04 12:09:16
PG PG
HH:MM Screen Title
1
st
Alarm # Alarm Title Unit Number
Alarm Date & Time of 1
st
alarm
2
nd
Alarm # Alarm Title Unit Number
Alarm Date & Time of 2
nd
alarm
Page up Page down
14:48 Graphs SUCT PSI
70
65
60
14:22:13 14:36:15 14:48:46
EDIT RO AO
HH:MM Screen Title Sensor Name
The graph has the last 25 samples with an appropriate
scale to allow it to fit on the display. Using the
up/down arrows will scroll through the different Sensor
Inputs, Relay outputs, or Analog Outputs.
Edit Sample Rate Switched to
09:56 Setpoints
Name Value
1 GLYCOL TRGT -5.2F
2 CTRL ZONE+ 0.5F
3 CTRL ZONE-0.5F
17 LO SUPERHEAT 2.0F
PG PG
HH:MM Screen Title Left/Right Arrow
Using Left/Right arrow allows user to view all data for
the setpoints displayed (Value, Time(sec), and Type)
Page up Page down
09:56 Inputs
Sensor Value
M-5 DISC TMP 150.0F
M-6 GlycTmp In 20.0F
M-7 GlycTmpOut 19.0F
M-8 Evp1SucTmp 15.0F
PG PG
HH:MM Screen Title Left/Right Arrow
SI position & names Current status of SI
(Value, Type, Last On, Last Off, Max Value Today, Min Value Today, Run
Time Today, Average Value Today, Cycles Today, Run Time Yesterday, Max
Value Yesterday, Cycles Yesterday, Min Value Yesterday, Total Run Hours,
Average Value Yesterday, and Total Cycles)
Page up Page down
Selecting the 'Alarms' menu option shows the first 2 alarms:
Selecting the 'Setpoints' menu option shows the first 4 setpoints:
Selecting the 'Graphs' menu option shows the following :
GETTING STARTED MANUAL REVISION 2.4
Pressing the Page Down button shows the next 4 Sensor Inputs:
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the Input screens. Alarms
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the Alarm screens. Graphs
ACTUAL DISPLAY DESCRIPTION
Setpoints
ACTUAL DISPLAY DESCRIPTION
09:56 Alarms
1 LOST RO COMM #2
JUL 04 12:09:16
2 LOST RO COMM #1
JUL 04 12:09:16
PG PG
HH:MM Screen Title
1
st
Alarm # Alarm Title Unit Number
Alarm Date & Time of 1
st
alarm
2
nd
Alarm # Alarm Title Unit Number
Alarm Date & Time of 2
nd
alarm
Page up Page down
14:48 Graphs SUCT PSI
70
65
60
14:22:13 14:36:15 14:48:46
EDIT RO AO
HH:MM Screen Title Sensor Name
The graph has the last 25 samples with an appropriate
scale to allow it to fit on the display. Using the
up/down arrows will scroll through the different Sensor
Inputs, Relay outputs, or Analog Outputs.
Edit Sample Rate Switched to
09:56 Setpoints
Name Value
1 GLYCOL TRGT -5.2F
2 CTRL ZONE+ 0.5F
3 CTRL ZONE-0.5F
17 LO SUPERHEAT 2.0F
PG PG
HH:MM Screen Title Left/Right Arrow
Using Left/Right arrow allows user to view all data for
the setpoints displayed (Value, Time(sec), and Type)
Page up Page down
09:56 Inputs
Sensor Value
M-5 DISC TMP 150.0F
M-6 GlycTmp In 20.0F
M-7 GlycTmpOut 19.0F
M-8 Evp1SucTmp 15.0F
PG PG
HH:MM Screen Title Left/Right Arrow
SI position & names Current status of SI
(Value, Type, Last On, Last Off, Max Value Today, Min Value Today, Run
Time Today, Average Value Today, Cycles Today, Run Time Yesterday, Max
Value Yesterday, Cycles Yesterday, Min Value Yesterday, Total Run Hours,
Average Value Yesterday, and Total Cycles)
Page up Page down
Selecting the 'Alarms' menu option shows the first 2 alarms:
Selecting the 'Setpoints' menu option shows the first 4 setpoints:
Selecting the 'Graphs' menu option shows the following :
Continue pressing the Page Down or Page Up buttons to scroll through all the Input screens.
ALARMS
Selecting the Alarms Menu option shows the rst 2 Alarms:
ACTUAL DISPLAY
GETTING STARTED MANUAL REVISION 2.4
Pressing the Page Down button shows the next 4 Sensor Inputs:
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the Input screens. Alarms
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the Alarm screens. Graphs
ACTUAL DISPLAY DESCRIPTION
Setpoints
ACTUAL DISPLAY DESCRIPTION
09:56 Alarms
1 LOST RO COMM #2
JUL 04 12:09:16
2 LOST RO COMM #1
JUL 04 12:09:16
PG PG
HH:MM Screen Title
1
st
Alarm # Alarm Title Unit Number
Alarm Date & Time of 1
st
alarm
2
nd
Alarm # Alarm Title Unit Number
Alarm Date & Time of 2
nd
alarm
Page up Page down
14:48 Graphs SUCT PSI
70
65
60
14:22:13 14:36:15 14:48:46
EDIT RO AO
HH:MM Screen Title Sensor Name
The graph has the last 25 samples with an appropriate
scale to allow it to fit on the display. Using the
up/down arrows will scroll through the different Sensor
Inputs, Relay outputs, or Analog Outputs.
Edit Sample Rate Switched to
09:56 Setpoints
Name Value
1 GLYCOL TRGT -5.2F
2 CTRL ZONE+ 0.5F
3 CTRL ZONE-0.5F
17 LO SUPERHEAT 2.0F
PG PG
HH:MM Screen Title Left/Right Arrow
Using Left/Right arrow allows user to view all data for
the setpoints displayed (Value, Time(sec), and Type)
Page up Page down
09:56 Inputs
Sensor Value
M-5 DISC TMP 150.0F
M-6 GlycTmp In 20.0F
M-7 GlycTmpOut 19.0F
M-8 Evp1SucTmp 15.0F
PG PG
HH:MM Screen Title Left/Right Arrow
SI position & names Current status of SI
(Value, Type, Last On, Last Off, Max Value Today, Min Value Today, Run
Time Today, Average Value Today, Cycles Today, Run Time Yesterday, Max
Value Yesterday, Cycles Yesterday, Min Value Yesterday, Total Run Hours,
Average Value Yesterday, and Total Cycles)
Page up Page down
Selecting the 'Alarms' menu option shows the first 2 alarms:
Selecting the 'Setpoints' menu option shows the first 4 setpoints:
Selecting the 'Graphs' menu option shows the following :
DESCRIPTION
GETTING STARTED MANUAL REVISION 2.4
Pressing the Page Down button shows the next 4 Sensor Inputs:
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the Input screens. Alarms
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the Alarm screens. Graphs
ACTUAL DISPLAY DESCRIPTION
Setpoints
ACTUAL DISPLAY DESCRIPTION
09:56 Alarms
1 LOST RO COMM #2
JUL 04 12:09:16
2 LOST RO COMM #1
JUL 04 12:09:16
PG PG
HH:MM Screen Title
1
st
Alarm # Alarm Title Unit Number
Alarm Date & Time of 1
st
alarm
2
nd
Alarm # Alarm Title Unit Number
Alarm Date & Time of 2
nd
alarm
Page up Page down
14:48 Graphs SUCT PSI
70
65
60
14:22:13 14:36:15 14:48:46
EDIT RO AO
HH:MM Screen Title Sensor Name
The graph has the last 25 samples with an appropriate
scale to allow it to fit on the display. Using the
up/down arrows will scroll through the different Sensor
Inputs, Relay outputs, or Analog Outputs.
Edit Sample Rate Switched to
09:56 Setpoints
Name Value
1 GLYCOL TRGT -5.2F
2 CTRL ZONE+ 0.5F
3 CTRL ZONE-0.5F
17 LO SUPERHEAT 2.0F
PG PG
HH:MM Screen Title Left/Right Arrow
Using Left/Right arrow allows user to view all data for
the setpoints displayed (Value, Time(sec), and Type)
Page up Page down
09:56 Inputs
Sensor Value
M-5 DISC TMP 150.0F
M-6 GlycTmp In 20.0F
M-7 GlycTmpOut 19.0F
M-8 Evp1SucTmp 15.0F
PG PG
HH:MM Screen Title Left/Right Arrow
SI position & names Current status of SI
(Value, Type, Last On, Last Off, Max Value Today, Min Value Today, Run
Time Today, Average Value Today, Cycles Today, Run Time Yesterday, Max
Value Yesterday, Cycles Yesterday, Min Value Yesterday, Total Run Hours,
Average Value Yesterday, and Total Cycles)
Page up Page down
Selecting the 'Alarms' menu option shows the first 2 alarms:
Selecting the 'Setpoints' menu option shows the first 4 setpoints:
Selecting the 'Graphs' menu option shows the following :
Continue pressing the Page Down or Page Up buttons to scroll through all the Alarm screens.
GRAPHS
Selecting the Graphs Menu option shows the following:
ACTUAL DISPLAY
GETTING STARTED MANUAL REVISION 2.4
Pressing the Page Down button shows the next 4 Sensor Inputs:
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the Input screens. Alarms
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the Alarm screens. Graphs
ACTUAL DISPLAY DESCRIPTION
Setpoints
ACTUAL DISPLAY DESCRIPTION
09:56 Alarms
1 LOST RO COMM #2
JUL 04 12:09:16
2 LOST RO COMM #1
JUL 04 12:09:16
PG PG
HH:MM Screen Title
1
st
Alarm # Alarm Title Unit Number
Alarm Date & Time of 1
st
alarm
2
nd
Alarm # Alarm Title Unit Number
Alarm Date & Time of 2
nd
alarm
Page up Page down
14:48 Graphs SUCT PSI
70
65
60
14:22:13 14:36:15 14:48:46
EDIT RO AO
HH:MM Screen Title Sensor Name
The graph has the last 25 samples with an appropriate
scale to allow it to fit on the display. Using the
up/down arrows will scroll through the different Sensor
Inputs, Relay outputs, or Analog Outputs.
Edit Sample Rate Switched to
09:56 Setpoints
Name Value
1 GLYCOL TRGT -5.2F
2 CTRL ZONE+ 0.5F
3 CTRL ZONE-0.5F
17 LO SUPERHEAT 2.0F
PG PG
HH:MM Screen Title Left/Right Arrow
Using Left/Right arrow allows user to view all data for
the setpoints displayed (Value, Time(sec), and Type)
Page up Page down
09:56 Inputs
Sensor Value
M-5 DISC TMP 150.0F
M-6 GlycTmp In 20.0F
M-7 GlycTmpOut 19.0F
M-8 Evp1SucTmp 15.0F
PG PG
HH:MM Screen Title Left/Right Arrow
SI position & names Current status of SI
(Value, Type, Last On, Last Off, Max Value Today, Min Value Today, Run
Time Today, Average Value Today, Cycles Today, Run Time Yesterday, Max
Value Yesterday, Cycles Yesterday, Min Value Yesterday, Total Run Hours,
Average Value Yesterday, and Total Cycles)
Page up Page down
Selecting the 'Alarms' menu option shows the first 2 alarms:
Selecting the 'Setpoints' menu option shows the first 4 setpoints:
Selecting the 'Graphs' menu option shows the following :
DESCRIPTION
GETTING STARTED MANUAL REVISION 2.4
Pressing the Page Down button shows the next 4 Sensor Inputs:
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the Input screens. Alarms
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the Alarm screens. Graphs
ACTUAL DISPLAY DESCRIPTION
Setpoints
ACTUAL DISPLAY DESCRIPTION
09:56 Alarms
1 LOST RO COMM #2
JUL 04 12:09:16
2 LOST RO COMM #1
JUL 04 12:09:16
PG PG
HH:MM Screen Title
1
st
Alarm # Alarm Title Unit Number
Alarm Date & Time of 1
st
alarm
2
nd
Alarm # Alarm Title Unit Number
Alarm Date & Time of 2
nd
alarm
Page up Page down
14:48 Graphs SUCT PSI
70
65
60
14:22:13 14:36:15 14:48:46
EDIT RO AO
HH:MM Screen Title Sensor Name
The graph has the last 25 samples with an appropriate
scale to allow it to fit on the display. Using the
up/down arrows will scroll through the different Sensor
Inputs, Relay outputs, or Analog Outputs.
Edit Sample Rate Switched to
09:56 Setpoints
Name Value
1 GLYCOL TRGT -5.2F
2 CTRL ZONE+ 0.5F
3 CTRL ZONE-0.5F
17 LO SUPERHEAT 2.0F
PG PG
HH:MM Screen Title Left/Right Arrow
Using Left/Right arrow allows user to view all data for
the setpoints displayed (Value, Time(sec), and Type)
Page up Page down
09:56 Inputs
Sensor Value
M-5 DISC TMP 150.0F
M-6 GlycTmp In 20.0F
M-7 GlycTmpOut 19.0F
M-8 Evp1SucTmp 15.0F
PG PG
HH:MM Screen Title Left/Right Arrow
SI position & names Current status of SI
(Value, Type, Last On, Last Off, Max Value Today, Min Value Today, Run
Time Today, Average Value Today, Cycles Today, Run Time Yesterday, Max
Value Yesterday, Cycles Yesterday, Min Value Yesterday, Total Run Hours,
Average Value Yesterday, and Total Cycles)
Page up Page down
Selecting the 'Alarms' menu option shows the first 2 alarms:
Selecting the 'Setpoints' menu option shows the first 4 setpoints:
Selecting the 'Graphs' menu option shows the following :
SETPOINTS
Selecting the Setpoints Menu option shows the rst 4 Setpoints:
ACTUAL DISPLAY
GETTING STARTED MANUAL REVISION 2.4
Pressing the Page Down button shows the next 4 Sensor Inputs:
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the Input screens. Alarms
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the Alarm screens. Graphs
ACTUAL DISPLAY DESCRIPTION
Setpoints
ACTUAL DISPLAY DESCRIPTION
09:56 Alarms
1 LOST RO COMM #2
JUL 04 12:09:16
2 LOST RO COMM #1
JUL 04 12:09:16
PG PG
HH:MM Screen Title
1
st
Alarm # Alarm Title Unit Number
Alarm Date & Time of 1
st
alarm
2
nd
Alarm # Alarm Title Unit Number
Alarm Date & Time of 2
nd
alarm
Page up Page down
14:48 Graphs SUCT PSI
70
65
60
14:22:13 14:36:15 14:48:46
EDIT RO AO
HH:MM Screen Title Sensor Name
The graph has the last 25 samples with an appropriate
scale to allow it to fit on the display. Using the
up/down arrows will scroll through the different Sensor
Inputs, Relay outputs, or Analog Outputs.
Edit Sample Rate Switched to
09:56 Setpoints
Name Value
1 GLYCOL TRGT -5.2F
2 CTRL ZONE+ 0.5F
3 CTRL ZONE-0.5F
17 LO SUPERHEAT 2.0F
PG PG
HH:MM Screen Title Left/Right Arrow
Using Left/Right arrow allows user to view all data for
the setpoints displayed (Value, Time(sec), and Type)
Page up Page down
09:56 Inputs
Sensor Value
M-5 DISC TMP 150.0F
M-6 GlycTmp In 20.0F
M-7 GlycTmpOut 19.0F
M-8 Evp1SucTmp 15.0F
PG PG
HH:MM Screen Title Left/Right Arrow
SI position & names Current status of SI
(Value, Type, Last On, Last Off, Max Value Today, Min Value Today, Run
Time Today, Average Value Today, Cycles Today, Run Time Yesterday, Max
Value Yesterday, Cycles Yesterday, Min Value Yesterday, Total Run Hours,
Average Value Yesterday, and Total Cycles)
Page up Page down
Selecting the 'Alarms' menu option shows the first 2 alarms:
Selecting the 'Setpoints' menu option shows the first 4 setpoints:
Selecting the 'Graphs' menu option shows the following :
DESCRIPTION
GETTING STARTED MANUAL REVISION 2.4
Pressing the Page Down button shows the next 4 Sensor Inputs:
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the Input screens. Alarms
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the Alarm screens. Graphs
ACTUAL DISPLAY DESCRIPTION
Setpoints
ACTUAL DISPLAY DESCRIPTION
09:56 Alarms
1 LOST RO COMM #2
JUL 04 12:09:16
2 LOST RO COMM #1
JUL 04 12:09:16
PG PG
HH:MM Screen Title
1
st
Alarm # Alarm Title Unit Number
Alarm Date & Time of 1
st
alarm
2
nd
Alarm # Alarm Title Unit Number
Alarm Date & Time of 2
nd
alarm
Page up Page down
14:48 Graphs SUCT PSI
70
65
60
14:22:13 14:36:15 14:48:46
EDIT RO AO
HH:MM Screen Title Sensor Name
The graph has the last 25 samples with an appropriate
scale to allow it to fit on the display. Using the
up/down arrows will scroll through the different Sensor
Inputs, Relay outputs, or Analog Outputs.
Edit Sample Rate Switched to
09:56 Setpoints
Name Value
1 GLYCOL TRGT -5.2F
2 CTRL ZONE+ 0.5F
3 CTRL ZONE-0.5F
17 LO SUPERHEAT 2.0F
PG PG
HH:MM Screen Title Left/Right Arrow
Using Left/Right arrow allows user to view all data for
the setpoints displayed (Value, Time(sec), and Type)
Page up Page down
09:56 Inputs
Sensor Value
M-5 DISC TMP 150.0F
M-6 GlycTmp In 20.0F
M-7 GlycTmpOut 19.0F
M-8 Evp1SucTmp 15.0F
PG PG
HH:MM Screen Title Left/Right Arrow
SI position & names Current status of SI
(Value, Type, Last On, Last Off, Max Value Today, Min Value Today, Run
Time Today, Average Value Today, Cycles Today, Run Time Yesterday, Max
Value Yesterday, Cycles Yesterday, Min Value Yesterday, Total Run Hours,
Average Value Yesterday, and Total Cycles)
Page up Page down
Selecting the 'Alarms' menu option shows the first 2 alarms:
Selecting the 'Setpoints' menu option shows the first 4 setpoints:
Selecting the 'Graphs' menu option shows the following :

17
© 2015 Heatcraft Refrigeration Products, LLC
GETTING STARTED MANUAL REVISION 2.4
Pressing the Page Down button shows the next 4 setpoints:
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the setpoint screens.
Service Tools
ACTUAL DISPLAY DESCRIPTION
Pressing the down arrow shows the rest of the submenu options:
ACTUAL DISPLAY DESCRIPTION
Lockout Reset
ACTUAL DISPLAY DESCRIPTION
09:56 Serv Tools
-RS485 Network 1
-Ethernet Network
-System Info
-Time / Date
-Display
PG PG
HH:MM Screen Title
Highlight choice and press enter to access Sub Menu.
1.RS485 Network-
View network protocol, address, and baud rate.
2.Ethernet Network- View dynaimic
IP, IP address, Subnet mask,
default gateway, and MCS port. 3.System Info- View Firmware
version, config name, company name, model name, unit serial
number, install date, config version, config date, bootloader
version, hardware serial number, physical ma
c address, and type
of I/O boards. 4.Time / Date-
View and change the time or date.
5. Display View contrast, background color, and backlight.
Page up Page down
HH:MM Screen Title
Pop-up will prompt user to perform lockout reset.
09:56 Setpoints
Name Value
23 POWERUP DLAY 15s
25 STEP SENSIT 1
26 STEP DELAY 180s
27 MAX ROC- -0.7F
PG PG
09:56 Serv Tools
-Clr Alarm Hist
-Clr Point Info
-Sensor Diagnostics
-Config Checksums
PG PG
HH:MM Screen Title
Highlight choice and press enter to access Sub Menu.
6.Clr Alarm Hist- Clear the alarm history. 7.Clr Point
Info- Clear the point information. 8.Sensor Diagnostics-
View sensor values and voltages. Page Up/Down for more
sensors. 9.Config Checksums- view if a section of the
configuration has been corrupted when an invalid config
alarm occurs. Both the calculated checksums and storage
checksums are displayed allowing the user to compare the
checksums. If all checksums match, then the file is not
corrupted. If a section has been corrupted the checksums
will not match.
Page up Page down
HH:MM Screen Title Left/Right Arrow
Using Left/Right arrow allows user to view all data for
the setpoints displayed (Value, Time(sec), and Type)
Page up Page down
09:56 Main Menu
-Status -Setpoints
-Outputs -Serv Tools
-Inputs -Lckout RST
-Alarms -Lckout ALM
-Graphs -Passwords
Help
Lockout Yes
Reset? No
Selecting the 'Service Tools' menu option shows the following submenu:
Selecting the 'Lckout RST' menu option shows the following:
ACTUAL DISPLAY
GETTING STARTED MANUAL REVISION 2.4
Pressing the Page Down button shows the next 4 setpoints:
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the setpoint screens.
Service Tools
ACTUAL DISPLAY DESCRIPTION
Pressing the down arrow shows the rest of the submenu options:
ACTUAL DISPLAY DESCRIPTION
Lockout Reset
ACTUAL DISPLAY DESCRIPTION
09:56 Serv Tools
-RS485 Network 1
-Ethernet Network
-System Info
-Time / Date
-Display
PG PG
HH:MM Screen Title
Highlight choice and press enter to access Sub Menu.
1.RS485 Network-
View network protocol, address, and baud rate.
2.Ethernet Network- View dynaimic
IP, IP address, Subnet mask,
default gateway, and MCS port. 3.System Info- View Firmware
version, config name, company name, model name, unit serial
number, install date, config version, config date, bootloader
version, hardware serial number, physical ma
c address, and type
of I/O boards. 4.Time / Date-
View and change the time or date.
5. Display View contrast, background color, and backlight.
Page up Page down
HH:MM Screen Title
Pop-up will prompt user to perform lockout reset.
09:56 Setpoints
Name Value
23 POWERUP DLAY 15s
25 STEP SENSIT 1
26 STEP DELAY 180s
27 MAX ROC- -0.7F
PG PG
09:56 Serv Tools
-Clr Alarm Hist
-Clr Point Info
-Sensor Diagnostics
-Config Checksums
PG PG
HH:MM Screen Title
Highlight choice and press enter to access Sub Menu.
6.Clr Alarm Hist- Clear the alarm history. 7.Clr Point
Info- Clear the point information. 8.Sensor Diagnostics-
View sensor values and voltages. Page Up/Down for more
sensors. 9.Config Checksums- view if a section of the
configuration has been corrupted when an invalid config
alarm occurs. Both the calculated checksums and storage
checksums are displayed allowing the user to compare the
checksums. If all checksums match, then the file is not
corrupted. If a section has been corrupted the checksums
will not match.
Page up Page down
HH:MM Screen Title Left/Right Arrow
Using Left/Right arrow allows user to view all data for
the setpoints displayed (Value, Time(sec), and Type)
Page up Page down
09:56 Main Menu
-Status -Setpoints
-Outputs -Serv Tools
-Inputs -Lckout RST
-Alarms -Lckout ALM
-Graphs -Passwords
Help
Lockout Yes
Reset? No
Selecting the 'Service Tools' menu option shows the following submenu:
Selecting the 'Lckout RST' menu option shows the following:
DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the Setpoint screens.
ACTUAL DISPLAY
GETTING STARTED MANUAL REVISION 2.4
Pressing the Page Down button shows the next 4 setpoints:
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the setpoint screens.
Service Tools
ACTUAL DISPLAY DESCRIPTION
Pressing the down arrow shows the rest of the submenu options:
ACTUAL DISPLAY DESCRIPTION
Lockout Reset
ACTUAL DISPLAY DESCRIPTION
09:56 Serv Tools
-RS485 Network 1
-Ethernet Network
-System Info
-Time / Date
-Display
PG PG
HH:MM Screen Title
Highlight choice and press enter to access Sub Menu.
1.RS485 Network-
View network protocol, address, and baud rate.
2.Ethernet Network- View dynaimic
IP, IP address, Subnet mask,
default gateway, and MCS port. 3.System Info- View Firmware
version, config name, company name, model name, unit serial
number, install date, config version, config date, bootloader
version, hardware serial number, physical ma
c address, and type
of I/O boards. 4.Time / Date-
View and change the time or date.
5. Display View contrast, background color, and backlight.
Page up Page down
HH:MM Screen Title
Pop-up will prompt user to perform lockout reset.
09:56 Setpoints
Name Value
23 POWERUP DLAY 15s
25 STEP SENSIT 1
26 STEP DELAY 180s
27 MAX ROC- -0.7F
PG PG
09:56 Serv Tools
-Clr Alarm Hist
-Clr Point Info
-Sensor Diagnostics
-Config Checksums
PG PG
HH:MM Screen Title
Highlight choice and press enter to access Sub Menu.
6.Clr Alarm Hist- Clear the alarm history. 7.Clr Point
Info- Clear the point information. 8.Sensor Diagnostics-
View sensor values and voltages. Page Up/Down for more
sensors. 9.Config Checksums- view if a section of the
configuration has been corrupted when an invalid config
alarm occurs. Both the calculated checksums and storage
checksums are displayed allowing the user to compare the
checksums. If all checksums match, then the file is not
corrupted. If a section has been corrupted the checksums
will not match.
Page up Page down
HH:MM Screen Title Left/Right Arrow
Using Left/Right arrow allows user to view all data for
the setpoints displayed (Value, Time(sec), and Type)
Page up Page down
09:56 Main Menu
-Status -Setpoints
-Outputs -Serv Tools
-Inputs -Lckout RST
-Alarms -Lckout ALM
-Graphs -Passwords
Help
Lockout Yes
Reset? No
Selecting the 'Service Tools' menu option shows the following submenu:
Selecting the 'Lckout RST' menu option shows the following:
DESCRIPTION
GETTING STARTED MANUAL REVISION 2.4
Pressing the Page Down button shows the next 4 setpoints:
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the setpoint screens.
Service Tools
ACTUAL DISPLAY DESCRIPTION
Pressing the down arrow shows the rest of the submenu options:
ACTUAL DISPLAY DESCRIPTION
Lockout Reset
ACTUAL DISPLAY DESCRIPTION
09:56 Serv Tools
-RS485 Network 1
-Ethernet Network
-System Info
-Time / Date
-Display
PG PG
HH:MM Screen Title
Highlight choice and press enter to access Sub Menu.
1.RS485 Network-
View network protocol, address, and baud rate.
2.Ethernet Network- View dynaimic
IP, IP address, Subnet mask,
default gateway, and MCS port. 3.System Info- View Firmware
version, config name, company name, model name, unit serial
number, install date, config version, config date, bootloader
version, hardware serial number, physical ma
c address, and type
of I/O boards. 4.Time / Date-
View and change the time or date.
5. Display View contrast, background color, and backlight.
Page up Page down
HH:MM Screen Title
Pop-up will prompt user to perform lockout reset.
09:56 Setpoints
Name Value
23 POWERUP DLAY 15s
25 STEP SENSIT 1
26 STEP DELAY 180s
27 MAX ROC- -0.7F
PG PG
09:56 Serv Tools
-Clr Alarm Hist
-Clr Point Info
-Sensor Diagnostics
-Config Checksums
PG PG
HH:MM Screen Title
Highlight choice and press enter to access Sub Menu.
6.Clr Alarm Hist- Clear the alarm history. 7.Clr Point
Info- Clear the point information. 8.Sensor Diagnostics-
View sensor values and voltages. Page Up/Down for more
sensors. 9.Config Checksums- view if a section of the
configuration has been corrupted when an invalid config
alarm occurs. Both the calculated checksums and storage
checksums are displayed allowing the user to compare the
checksums. If all checksums match, then the file is not
corrupted. If a section has been corrupted the checksums
will not match.
Page up Page down
HH:MM Screen Title Left/Right Arrow
Using Left/Right arrow allows user to view all data for
the setpoints displayed (Value, Time(sec), and Type)
Page up Page down
09:56 Main Menu
-Status -Setpoints
-Outputs -Serv Tools
-Inputs -Lckout RST
-Alarms -Lckout ALM
-Graphs -Passwords
Help
Lockout Yes
Reset? No
Selecting the 'Service Tools' menu option shows the following submenu:
Selecting the 'Lckout RST' menu option shows the following:
Pressing the down arrow shows the rest of the submenu options:
ACTUAL DISPLAY
GETTING STARTED MANUAL REVISION 2.4
Pressing the Page Down button shows the next 4 setpoints:
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the setpoint screens.
Service Tools
ACTUAL DISPLAY DESCRIPTION
Pressing the down arrow shows the rest of the submenu options:
ACTUAL DISPLAY DESCRIPTION
Lockout Reset
ACTUAL DISPLAY DESCRIPTION
09:56 Serv Tools
-RS485 Network 1
-Ethernet Network
-System Info
-Time / Date
-Display
PG PG
HH:MM Screen Title
Highlight choice and press enter to access Sub Menu.
1.RS485 Network-
View network protocol, address, and baud rate.
2.Ethernet Network- View dynaimic
IP, IP address, Subnet mask,
default gateway, and MCS port. 3.System Info- View Firmware
version, config name, company name, model name, unit serial
number, install date, config version, config date, bootloader
version, hardware serial number, physical ma
c address, and type
of I/O boards. 4.Time / Date-
View and change the time or date.
5. Display View contrast, background color, and backlight.
Page up Page down
HH:MM Screen Title
Pop-up will prompt user to perform lockout reset.
09:56 Setpoints
Name Value
23 POWERUP DLAY 15s
25 STEP SENSIT 1
26 STEP DELAY 180s
27 MAX ROC- -0.7F
PG PG
09:56 Serv Tools
-Clr Alarm Hist
-Clr Point Info
-Sensor Diagnostics
-Config Checksums
PG PG
HH:MM Screen Title
Highlight choice and press enter to access Sub Menu.
6.Clr Alarm Hist- Clear the alarm history. 7.Clr Point
Info- Clear the point information. 8.Sensor Diagnostics-
View sensor values and voltages. Page Up/Down for more
sensors. 9.Config Checksums- view if a section of the
configuration has been corrupted when an invalid config
alarm occurs. Both the calculated checksums and storage
checksums are displayed allowing the user to compare the
checksums. If all checksums match, then the file is not
corrupted. If a section has been corrupted the checksums
will not match.
Page up Page down
HH:MM Screen Title Left/Right Arrow
Using Left/Right arrow allows user to view all data for
the setpoints displayed (Value, Time(sec), and Type)
Page up Page down
09:56 Main Menu
-Status -Setpoints
-Outputs -Serv Tools
-Inputs -Lckout RST
-Alarms -Lckout ALM
-Graphs -Passwords
Help
Lockout Yes
Reset? No
Selecting the 'Service Tools' menu option shows the following submenu:
Selecting the 'Lckout RST' menu option shows the following:
DESCRIPTION
GETTING STARTED MANUAL REVISION 2.4
Pressing the Page Down button shows the next 4 setpoints:
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the setpoint screens.
Service Tools
ACTUAL DISPLAY DESCRIPTION
Pressing the down arrow shows the rest of the submenu options:
ACTUAL DISPLAY DESCRIPTION
Lockout Reset
ACTUAL DISPLAY DESCRIPTION
09:56 Serv Tools
-RS485 Network 1
-Ethernet Network
-System Info
-Time / Date
-Display
PG PG
HH:MM Screen Title
Highlight choice and press enter to access Sub Menu.
1.RS485 Network-
View network protocol, address, and baud rate.
2.Ethernet Network- View dynaimic
IP, IP address, Subnet mask,
default gateway, and MCS port. 3.System Info- View Firmware
version, config name, company name, model name, unit serial
number, install date, config version, config date, bootloader
version, hardware serial number, physical ma
c address, and type
of I/O boards. 4.Time / Date-
View and change the time or date.
5. Display View contrast, background color, and backlight.
Page up Page down
HH:MM Screen Title
Pop-up will prompt user to perform lockout reset.
09:56 Setpoints
Name Value
23 POWERUP DLAY 15s
25 STEP SENSIT 1
26 STEP DELAY 180s
27 MAX ROC- -0.7F
PG PG
09:56 Serv Tools
-Clr Alarm Hist
-Clr Point Info
-Sensor Diagnostics
-Config Checksums
PG PG
HH:MM Screen Title
Highlight choice and press enter to access Sub Menu.
6.Clr Alarm Hist- Clear the alarm history. 7.Clr Point
Info- Clear the point information. 8.Sensor Diagnostics-
View sensor values and voltages. Page Up/Down for more
sensors. 9.Config Checksums- view if a section of the
configuration has been corrupted when an invalid config
alarm occurs. Both the calculated checksums and storage
checksums are displayed allowing the user to compare the
checksums. If all checksums match, then the file is not
corrupted. If a section has been corrupted the checksums
will not match.
Page up Page down
HH:MM Screen Title Left/Right Arrow
Using Left/Right arrow allows user to view all data for
the setpoints displayed (Value, Time(sec), and Type)
Page up Page down
09:56 Main Menu
-Status -Setpoints
-Outputs -Serv Tools
-Inputs -Lckout RST
-Alarms -Lckout ALM
-Graphs -Passwords
Help
Lockout Yes
Reset? No
Selecting the 'Service Tools' menu option shows the following submenu:
Selecting the 'Lckout RST' menu option shows the following:
ACTUAL DISPLAY
GETTING STARTED MANUAL REVISION 2.4
Pressing the Page Down button shows the next 4 setpoints:
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the setpoint screens.
Service Tools
ACTUAL DISPLAY DESCRIPTION
Pressing the down arrow shows the rest of the submenu options:
ACTUAL DISPLAY DESCRIPTION
Lockout Reset
ACTUAL DISPLAY DESCRIPTION
09:56 Serv Tools
-RS485 Network 1
-Ethernet Network
-System Info
-Time / Date
-Display
PG PG
HH:MM Screen Title
Highlight choice and press enter to access Sub Menu.
1.RS485 Network-
View network protocol, address, and baud rate.
2.Ethernet Network- View dynaimic
IP, IP address, Subnet mask,
default gateway, and MCS port. 3.System Info- View Firmware
version, config name, company name, model name, unit serial
number, install date, config version, config date, bootloader
version, hardware serial number, physical ma
c address, and type
of I/O boards. 4.Time / Date-
View and change the time or date.
5. Display View contrast, background color, and backlight.
Page up Page down
HH:MM Screen Title
Pop-up will prompt user to perform lockout reset.
09:56 Setpoints
Name Value
23 POWERUP DLAY 15s
25 STEP SENSIT 1
26 STEP DELAY 180s
27 MAX ROC- -0.7F
PG PG
09:56 Serv Tools
-Clr Alarm Hist
-Clr Point Info
-Sensor Diagnostics
-Config Checksums
PG PG
HH:MM Screen Title
Highlight choice and press enter to access Sub Menu.
6.Clr Alarm Hist- Clear the alarm history. 7.Clr Point
Info- Clear the point information. 8.Sensor Diagnostics-
View sensor values and voltages. Page Up/Down for more
sensors. 9.Config Checksums- view if a section of the
configuration has been corrupted when an invalid config
alarm occurs. Both the calculated checksums and storage
checksums are displayed allowing the user to compare the
checksums. If all checksums match, then the file is not
corrupted. If a section has been corrupted the checksums
will not match.
Page up Page down
HH:MM Screen Title Left/Right Arrow
Using Left/Right arrow allows user to view all data for
the setpoints displayed (Value, Time(sec), and Type)
Page up Page down
09:56 Main Menu
-Status -Setpoints
-Outputs -Serv Tools
-Inputs -Lckout RST
-Alarms -Lckout ALM
-Graphs -Passwords
Help
Lockout Yes
Reset? No
Selecting the 'Service Tools' menu option shows the following submenu:
Selecting the 'Lckout RST' menu option shows the following:
DESCRIPTION
GETTING STARTED MANUAL REVISION 2.4
Pressing the Page Down button shows the next 4 setpoints:
ACTUAL DISPLAY DESCRIPTION
Continue pressing the Page Down or Page Up buttons to scroll through all the setpoint screens.
Service Tools
ACTUAL DISPLAY DESCRIPTION
Pressing the down arrow shows the rest of the submenu options:
ACTUAL DISPLAY DESCRIPTION
Lockout Reset
ACTUAL DISPLAY DESCRIPTION
09:56 Serv Tools
-RS485 Network 1
-Ethernet Network
-System Info
-Time / Date
-Display
PG PG
HH:MM Screen Title
Highlight choice and press enter to access Sub Menu.
1.RS485 Network-
View network protocol, address, and baud rate.
2.Ethernet Network- View dynaimic
IP, IP address, Subnet mask,
default gateway, and MCS port. 3.System Info- View Firmware
version, config name, company name, model name, unit serial
number, install date, config version, config date, bootloader
version, hardware serial number, physical ma
c address, and type
of I/O boards. 4.Time / Date-
View and change the time or date.
5. Display View contrast, background color, and backlight.
Page up Page down
HH:MM Screen Title
Pop-up will prompt user to perform lockout reset.
09:56 Setpoints
Name Value
23 POWERUP DLAY 15s
25 STEP SENSIT 1
26 STEP DELAY 180s
27 MAX ROC- -0.7F
PG PG
09:56 Serv Tools
-Clr Alarm Hist
-Clr Point Info
-Sensor Diagnostics
-Config Checksums
PG PG
HH:MM Screen Title
Highlight choice and press enter to access Sub Menu.
6.Clr Alarm Hist- Clear the alarm history. 7.Clr Point
Info- Clear the point information. 8.Sensor Diagnostics-
View sensor values and voltages. Page Up/Down for more
sensors. 9.Config Checksums- view if a section of the
configuration has been corrupted when an invalid config
alarm occurs. Both the calculated checksums and storage
checksums are displayed allowing the user to compare the
checksums. If all checksums match, then the file is not
corrupted. If a section has been corrupted the checksums
will not match.
Page up Page down
HH:MM Screen Title Left/Right Arrow
Using Left/Right arrow allows user to view all data for
the setpoints displayed (Value, Time(sec), and Type)
Page up Page down
09:56 Main Menu
-Status -Setpoints
-Outputs -Serv Tools
-Inputs -Lckout RST
-Alarms -Lckout ALM
-Graphs -Passwords
Help
Lockout Yes
Reset? No
Selecting the 'Service Tools' menu option shows the following submenu:
Selecting the 'Lckout RST' menu option shows the following:
SERVICE TOOLS
Selecting the Service Tools Menu option shows the following submenu:
LOCKOUT RESET
Selecting the Lockout RST Menu option shows the following:

18 © 2015 Heatcraft Refrigeration Products, LLC
PROBLEM POSSIBLE CAUSES POSSIBLE CORRECTIVE STEPS
Compressor will not
run
1. Main switch open.
2. Fuse blown.
3. Thermal overloads tripped.
4. Defective contactor or coil.
5. System shut down by safety devices.
6. No cooling required.
7. Liquid line solenoid will not open.
8. Motor electrical trouble.
9. Loose wiring.
10. Phase loss monitor inoperative.
1. Close switch.
2. Check electrical circuits and motor winding for shorts or grounds. Investigate for
possible overloading. Replace fuse after fault is corrected.
3. Overloads are automatically reset. Check unit closely when unit comes back
on line.
4. Repair or replace.
5. Determine type and cause of shutdown and correct it before resetting safety
switch.
6. None. Wait until calls for cooling.
7. Repair or replace coil.
8. Check motor for open windings, short circuit or burn out.
9. Check all wire junctions. Tighten all terminal screws.
10. Refer to page 17.
Compressor noisy or
vibrating
1. Flooding of refrigerant into crankcase.
2. Improper piping support on suction or liquid line.
3. Worn compressor.
1. Check setting of expansion valves.
2. Relocate, add or remove hangers.
3. Replace.
High discharge
pressure
1. Non-condensables in system.
2. System overcharges with refrigerant.
3. Discharge shutoff valve partially closed.
4. Fan not running.
5. Head pressure control setting.
6. Dirty condenser coil.
1. Remove the non-condensables.
2. Remove excess.
3. Open valve.
4. Check electrical circuit.
5. Adjust.
6. Clean.
Low discharge
pressure
1. Faulty condenser temperature regulation.
2. Suction shutoff valve partially closed.
3. Insufficient refrigerant in system.
4. Low suction pressure.
5. Variable head pressure valve.
1. Check condenser control operation.
2. Open valve.
3. Check for leaks. Repair and add charge.
4. See corrective steps for low suction pressure.
5. Check valve setting.
High suction pressure 1. Excessive load.
2. Expansion valve overfeeding.
1. Reduce load or add additional equipment.
2. Check remote bulb. Regulate superheat.
Low suction pressure 1. Lack of refrigerant.
2. Evaporator dirty or iced.
3. Clogged liquid line filter drier.
4. Clogged suction line or compressor suction gas strainers.
5. Expansion valve malfunctioning.
6. Condensing temperature too low.
7. Improper TXV.
1. Check for leaks. Repair and add charge.
2. Clean.
3. Replace cartridge(s).
4. Clean strainers.
5. Check and reset for proper superheat.
6. Check means for regulating condensing temperature.
7. Check for proper sizing.
Compressor loses oil 1. Lack of refrigerant.
2. Excessive compression ring blow by.
3. Refrigerant flood back.
4. Improper piping or traps.
1. Check for leaks and repair. Add refrigerant.
2. Maintain proper superheat at compressor.
3. Correct piping.
Compressor thermal
protector switch open
1. Operating beyond design conditions.
2. Dirty condenser coil.
3. Overcharged system.
1. Add components to bring conditions within acceptable limits (i.e., CPR/EPR
valves, additional condenser surface, liquid injection, etc.).
2. Open valve.
3. Clean coil.
4. Reduce charge.
Table 10. System Troubleshooting Chart

19
© 2015 Heatcraft Refrigeration Products, LLC
PROBLEM POTENTIAL SOLUTION
A sensor input reads -99.9 This indicates an open sensor input signal or 5 VDC problem.
• Check sensor wiring for missing wire or poor connection.
• Check sensor for bad sensor.
If less than 5 VDC is on the sensor 5 VDC terminal block, the problem is with probably a
shorted sensor. (A poly fuse protects the board)
• Remove all sensor input terminals.
• Wait about 1 min. or until 5 VDC restored at sensor input.
• Connect terminals one at a time until short reappears.
A sensor input reads +999.9 This indicates a shorted sensor input signal.
• Check sensor wiring for +5VDC shorted to signal etc.
• Check sensor for bad sensor.
A sensor is reading less then or
greater than 3% off
This indicates the sensor needs to be calibrated. (You need to have a valid Authorization
code to change sensor offsets)
• Press Service Diagnostics, press until LCD display s sensor offset option Press
• enter, 1st SI# and offset appears (i.e. Suction 1 = 0.0)
• Scroll using 'increase' (+)/decrease (-)' keys to find sensor to calibrated
• Press enter, use the 'increase' (+)/decrease (-)' keys to change calibration value.
• When value is correct press enter.
LCD blank or flashing. Indicates bad connection.
• Check wiring to keypad
• Could indicate bad software transfer, retransmitting may be necessary.
Lost I/O Indicates communications problem.
• Verify RS485 LED blinking.
• Verify termination jumper only on JP4 on the MCS-Magnum and the last I/O board.
• Verify MCS-Magnum and each I/O address is set correctly.
• Verify wiring from the MCS-Magnum to each I/O is correct.
• Check fuses/120 VAC on I/O units
Invalid reading on one sensor input This indicates an input problem with 1 sensor.
• Verify jumper settings correct for that SI.
Invalid authorization This indicates an invalid authorization number. Follow
steps below for proper authorization
• Press SERVICE DIAGNOSTICS until the auth. option appears Press the
• ENTER key
• From the 'Display Status' menu press keys corresponding to your authorization
• Press ENTER
Troubleshooting Quick Reference Sheet

20 © 2015 Heatcraft Refrigeration Products, LLC
Magnum Alarms and Safeties
There are three types of alarms that are generated by the Magnum control logic:
• Information only alarms
• Magnum system alarms
• Chiller setpoint safety alarms
All alarms have the same format. The alarm is identied and is date/time stamped. Alarms can be viewed from the Magnum keypad by selecting the ‘Alarms’ from the main menu,
or through MCS-Connect.
Information Only Alarms
System Generated Alarms
The following alarms are generated to provide information; they will not cause a change in the control algorithm such as a lock out condition or a Relay Output being forced off.
• POWER FAILED - Generated when power to the Magnum was lost.
• POWER RETURNED - Generated when power to the Magnum returned.
• HW DATE INVALID -The date contained/read from the hardware real time clock chip is not valid. Check battery voltage, it should be > 2.0 vdc.
• HW TIME INVALID - The time contained/read from the hardware real time clock chip is not valid. Check battery voltage, it should be > 2.0 vdc.
• SW DATE INVALID - The date contained/read from the software clock is not valid.
• SW TIME INVALID - The time contained/read from the software clock is not valid.
• RAM INTEGRITY - The data contained in the battery-backed up RAM memory may be corrupted. This does not stop the Magnum from running. It means the historical data
may be incorrect (run times, cycles, min/max values, and trend/graph data).
• WATCHDOG RESET - The Magnum has reset itself because of improper operator of the Magnum board. Please consult the manufacturer if this alarm has occurred.
• LOST A/D CONVTR - The Magnum microprocessor has lost communications to the Analog to Digital converter chip (chip that converts sensor voltages to a digital number).
Check for a shorted sensor that may cause
• LOST DISPLAY - Generated when communication to the Keypad/Display is lost.
• CF INIT ERROR - The Compact Flash card that was installed cannot be initialized and therefore cannot be used. Replace the Compact Flash card with one that works.
• BATTERY FAILED- Generated when Magnum is not getting power from the Battery.
User Initiated Alarms
The following alarms indicate that an individual took action: (Most require proper authorization)
• LOCKOUT RESET - Generated when a user resets a compressor other unit from a locked condition.
• COMPUTER RESET - Generated when the manual reset button on the Magnum is pressed.
• ALARMS CLEARED –Generated when a user clears the alarm history.
• STPT CHANGED - Generated when a user makes a change to a setpoint; the number of the setpoint will also be displayed with the alarm.
• RO TO (Selected Condition) - Generated when a user manually changes the condition of a Relay Output (either AUTO, MANON, or MANOFF).
• AO TO (Selected Condition) - Generated when a user changes the condition of an Analog Output (either AUTO or MANUAL. If MANUAL, then a dialog box
will appear to input the number value).
• SI TO (Selected Condition) - Generated when a user changes the condition of a Sensor Input (If a digital input, then either AUTO, MANON, or MANOFF. If an analog input,
then either AUTO or MANUAL. If MANUAL, then a dialog box will appear to input the number value).
• POINT INFO CLEAR - Generated when a user clears all point information (run times, cycles, min/max values, etc.).
• CLOCK SET - Generated when a user makes a change to the Magnum real time clock.
• CFG DOWNLOADED-Generated when a user uploads a new conguration le into the Magnum. ETHERNET
• RS485 CHANGED - Generated when a user makes changes to the RS485 address through the Keypad/Display.
• CF CARD INSERTED - Generated when a user inserts a Compact Flash memory card into the Magnum
• CF CARD REMOVED - Generated when a user removes a Compact Flash memory card from the Magnum.
Automatic Alarms
The following alarms indicate an action that the Magnum made automatically:
• ROTATED LEAD- Generated when the Magnum automatically rotates the Lead Compressor.
• DAYLIGHT SAVINGS – Generated when the Magnum automatically changes the real time clock to adjust for Daylight Savings Time.