Carrier Aquazone 50PSW025 Dimensions and installation guide

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500103-01 Printed in U.S.A. Form 50PSW-3SI Pg 1 8-14 Replaces: NEW
Installation, Start-Up, and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . .1,2
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Step 1 — Check Jobsite . . . . . . . . . . . . . . . . . . . . . . . . 2
Step 2 — Check Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
• STORAGE
•PROTECTION
•INSPECTUNIT
Step 3 — Locate Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Step 4 — Mount Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Step 5 — Connect Piping. . . . . . . . . . . . . . . . . . . . . . . . . 6
• WATER SUPPLY AND QUALITY
• COOLING TOWER/BOILER APPLICATION
• WELL WATER SYSTEMS
• EARTH COUPLED GEOTHERMAL SYSTEMS
Step 6 — Wire Electrical Connections . . . . . . . . . . . 11
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
System Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
FIELD SELECTABLE INPUTS . . . . . . . . . . . . . . . 16-18
Safety Devices and the Complete C Controller . . 16
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19,20
Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Unit Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Scroll Compressor Rotation. . . . . . . . . . . . . . . . . . . . . 19
Cleaning and Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Antifreeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Cooling Tower/Boiler Systems . . . . . . . . . . . . . . . . . . 20
Ground Coupled, Closed Loop and Plateframe
Heat Exchanger Well Systems . . . . . . . . . . . . . . . . 20
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20,21
Power Up Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Units with Aquazone Complete C Control . . . . . . . 20
Off Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Heating Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Cooling Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Retry Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21,22
Water Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Refrigerant System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Condenser Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Checking System Charge . . . . . . . . . . . . . . . . . . . . . . . 22
Refrigerant Charging. . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . .22,23
50PSW START-UP CHECKLIST . . . . . . . . . . . CL-1,CL-2
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electrical compo-
nents. Only trained and qualified service personnel should
install, repair, or service air-conditioning equipment.
Untrained personnel can perform basic maintenance func-
tion of cleaning coils. All other operations should be performed
by trained service personnel. When working on air-condition-
ing equipment, observe precautions in the literature, tags and
labels attached to the unit, and other safety precautions that
may apply.
Improper installation, adjustment, alteration, service, main-
tenance, or use can cause explosion, fire, electrical shock or
other conditions which may cause personal injury or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The
qualified installer or agency must use factory-authorized kits or
accessories when modifying this product. Refer to the individ-
ual instructions packaged with the kits or accessories when
installing.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for brazing operations. Have fire
extinguisher available. Read these instructions thoroughly and
follow all warnings or cautions attached to the unit. Consult
local building codes and the National Electrical Code (NEC)
for special installation requirements.
Understand the signal words — DANGER, WARNING,
and CAUTION. DANGER identifies the most serious hazards
which will result in severe personal injury or death. WARN-
ING signifies hazards that could result in personal injury or
death. CAUTION is used to identify unsafe practices, which
would result in minor personal injury or product and property
damage.
Recognize safety information. This is the safety alert
symbol ( ). When you see this symbol on the unit and in
instructions or manuals, be alert to the potential for personal
injury.
IMPORTANT: Read the entire instruction manual before
starting installation.
WARNING
Electrical shock can cause personal injury or death. Before
installing or servicing system, always turn off main power
to system. There may be more than one disconnect switch.
Turn off accessory heater power if applicable. Install lock-
out tag.
Aquazone™
50PSW025-420
Water-to-Water Source Heat Pump
with Puron® Refrigerant (R-410A)

2
GENERAL
The Aquazone™ 50PSW water source heat pump (WSHP)
is a single-package vertically mounted unit with electronic con-
trols designed for year-round cooling and heating.
INSTALLATION
Step 1 — Check Jobsite — Installation, operation and
maintenance instructions are provided with each unit. Before
unit start-up, read all manuals and become familiar with the
unit and its operation. Thoroughly check out the system before
operation. Complete the inspections and instructions listed
below to prepare a unit for installation. See Tables 1 and 2 for
unit physical data.
Units are designed for indoor installation only. Be sure to al-
low adequate space around the unit for servicing. See Fig. 1-3
for overall unit dimensions.
These units are not approved for outdoor installation and
must be installed indoors in the structure being conditioned. Do
not locate in areas where ambient conditions are not main-
tained within 40 to 100 F.
Step 2 — Check Unit — Upon receipt of shipment at
the jobsite, carefully check the shipment against the bill of
lading. Make sure all units have been received. Inspect the car-
ton or crating of each unit, and inspect each unit for damage.
Ensure the shipping company makes proper notation of any
shortages or damage on all copies of the freight bill. Concealed
damage not discovered during unloading must be reported to
the shipping company within 15 days of receipt of shipment.
NOTE: It is the responsibility of the purchaser to file all
necessary claims with the shipping company.
1. Verify unit is correct model for entering water tempera-
ture of job.
2. Be sure the location chosen for unit installation provides
ambient temperatures maintained above freezing. Well
water applications are especially susceptible to freezing.
3. Be sure the installation location is isolated from sleeping
areas, private offices and other acoustically sensitive
spaces.
NOTE: A sound control accessory package may be used
to help eliminate sound in sensitive spaces.
4. Provide sufficient access to allow maintenance and
servicing of the compressor and coils.
5. Provide an unobstructed path to the unit within the closet
or mechanical room. Space should be sufficient to allow
removal of unit if necessary.
6. Provide ready access to water valves and fittings, and
screwdriver access to unit side panels.
7. Where access to side panels is limited, pre-removal of the
control box side mounting screws may be necessary for
future servicing.
STORAGE — If the equipment is not needed for immediate
installation upon its arrival at the jobsite, it should be left in its
shipping carton and stored in a clean, dry area of the building
or in a warehouse. Units must be stored in an upright position
at all times. If carton stacking is necessary, stack units a maxi-
mum of 3 cartons high. Do not remove any equipment from its
shipping package until it is needed for installation.
Table 1 — 50PSW 025-071 Unit Physical Data
WARNING
DO NOT USE TORCH to remove any component. System
contains oil and refrigerant under pressure.
To remove a component, wear protective gloves and gog-
gles and proceed as follows:
a. Shut off electrical power to unit.
b. Recover refrigerant to relieve all pressure from sys-
tem using both high-pressure and low pressure ports.
c. Traces of vapor should be displaced with nitrogen
and the work area should be well ventilated. Refrig-
erant in contact with an open flame produces toxic
gases.
d. Cut component connection tubing with tubing cutter
and remove component from unit. Use a pan to catch
any oil that may come out of the lines and as a gage
for how much oil to add to the system.
e. Carefully unsweat remaining tubing stubs when nec-
essary. Oil can ignite when exposed to torch flame.
Failure to follow these procedures may result in personal
injury or death.
CAUTION
DO NOT re-use compressor oil or any oil that has been
exposed to the atmosphere. Dispose of oil per local codes
and regulations. DO NOT leave refrigerant system open to
air any longer than the actual time required to service the
equipment. Seal circuits being serviced and charge with
dry nitrogen to prevent oil contamination when timely
repairs cannot be completed. Failure to follow these proce-
dures may result in damage to equipment.
IMPORTANT: The installation of water source heat pump
units and all associated components, parts, and accessories
which make up the installation shall be in accordance with
the regulations of ALL authorities having jurisdiction and
MUST conform to all applicable codes. It is the responsi-
bility of the installing contractor to determine and comply
with ALL applicable codes and regulations.
CAUTION
To avoid equipment damage, do not use these units as a
source of heating or cooling during the construction pro-
cess. The mechanical components used in these units can
quickly become clogged with construction dirt and debris
which may cause system damage.
50PSW UNIT SIZE 025 035 049 061 071
Compressor Type Scroll Scroll Scroll Scroll Scroll
Quantity 11111
Maximum Water Working Pressure
(psig/kPa) 400/3100 400/3100 400/3100 400/3100 400/3100
Water Connection Size (in.)
FPT 3/43/4111
Refrigeration Charge (oz/ckt) 48 59 62 72 90
Operating Weight (lb) 240 250 280 310 430
Shipping Weight (lb) 260 270 300 330 450

3
Table 2 — 50PSW 122-420 Unit Physical Data
50PSW UNIT SIZE 122 180 210 240 360 420
Compressor Type Scroll Scroll Scroll Scroll Scroll Scroll
Quantity 211222
Maximum Water Working Pressure
(psig/kPa) 400/3100 400/3100 400/3100 400/3100 400/3100 400/3100
Water Connection Size (in.)
FPT 11/411/211/2222
Refrigeration Charge (oz/ckt) 85 210 220 140 210 220
Operating Weight (lb) 720 850 890 1230 1550 1700
Shipping Weight (lb) 740 870 910 1260 1580 1730
Fig. 1 — 50PSW025-071 Unit
T
QRS
24.0
LEFT SIDE
UNIT FRONT
L
K
H
J
32.5
E
D
F
24.0
G
P
M
N
LEGEND
*Refers to both load and source fluid connections.
NOTES:All dimensions are within ± 0.125 in. Specifications subject to change without notice.
UNIT
SIZE
DIMENSIONS (INCHES) FIELD
CONN.*
HRP
CONN.
DE F G H J K L M N P Q R S T
025 2.70 2.50 13.70 2.50 3.25 1.95 14.25 1.95 7.15 11.00 4.25 6.55 8.05 9.55 1.25 3/41/2
035 2.30 2.30 14.30 2.50 3.70 2.55 15.70 2.55 7.15 11.00 4.25 6.55 8.05 9.55 1.25 3/41/2
049 2.30 2.60 14.30 2.65 3.70 2.65 15.70 2.65 7.15 11.00 4.25 6.55 8.05 9.55 1.25 1 1/2
061 2.30 2.60 14.30 2.65 3.20 2.65 15.20 2.65 7.15 11.00 4.25 6.55 8.05 9.55 1.25 1 1/2
071 2.50 2.60 21.75 4.45 2.50 2.45 21.75 2.65 7.15 11.00 4.25 6.55 8.05 9.55 1.25 1 1/2
HRP — Heat Recovery Package

4
Fig. 2 — 50PSW122-210 Unit
K
L
A
LEFT SIDE
C
B
D
H
F
E
G
M
J
SOURCE OUT
SOURCE IN
LOAD OUT
LOAD IN
UNIT REAR
ELECTRICAL
CONNECTIONS
FRONT
LEFT SIDE
UNIT
SIZE
DIMENSIONS (INCHES) WATER
CONN.
(FPT)
ABC D E F G H J K L M
122 37.50 27.62 7.00 8.38 9.25 33.50 20.75 13.50 17.50 3.50 46.00 28.00 11/4
180 37.50 19.75 4.50 8.38 9.25 33.50 24.00 13.50 17.50 3.50 46.00 28.00 11/2
210 37.50 19.75 4.50 8.38 9.25 33.50 23.50 13.50 17.50 3.50 46.00 28.00 11/2

5
PROTECTION — Once the units are properly positioned on
the jobsite, they must be covered with either a shipping carton,
vinyl film, or an equivalent protective covering. Open ends of
pipes stored on the jobsite must be capped. This precaution is
especially important in areas where painting, plastering, or
spraying of fireproof material, etc., is not yet complete. Foreign
material that is allowed to accumulate within the units can pre-
vent proper start-up and necessitate costly clean-up operations.
Before installing any of the system components, be sure to
examine each pipe, fitting, and valve, and remove any dirt or
foreign material found in or on these components.
Fig. 3 — 50PSW240-420 Unit
UNIT
SIZE
DIMENSIONS (INCHES) WATER
CONN.
(FPT)
ABC D E F G H J K L M
240 70.00 44.00 8.50 24.50 10.50 49.00 17.50 30.00 20.50 3.50 46.00 28.00 2
360 70.00 44.00 4.50 24.50 10.50 49.00 17.50 30.00 23.50 3.50 46.00 28.00 2
420 70.00 44.00 4.50 24.50 10.50 49.00 17.50 30.00 23.50 3.50 46.00 28.00 2
K
L
LOAD OUT
SOURCE OUT
SOURCE IN
LOAD IN
C
B
D
H
F
E
J
M
G
UNIT REAR
A
LEFT SIDE
ELECTRICAL
CONNECTIONS
FRONT
LEFT SIDE
CAUTION
DO NOT store or install units in corrosive environments or
in locations subject to temperature or humidity extremes
(e.g., attics, garages, rooftops, etc.). Corrosive conditions
and high temperature or humidity can significantly reduce
performance, reliability, and service life. Always move
units in an upright position. Tilting units on their sides may
cause equipment damage.

6
INSPECT UNIT — To prepare the unit for installation, com-
plete the procedures listed below:
1. Compare the electrical data on the unit nameplate with
ordering and shipping information to verify that the
correct unit has been shipped.
2. Verify that the unit is the correct model for the entering
water temperature of the job.
3. Wait to remove the packaging until the unit is ready for
installation.
4. Verify that the refrigerant tubing is free of kinks or dents,
and that it does not touch other unit components.
5. Inspect all electrical connections. Be sure connections are
clean and tight at the terminals.
6. Loosen bolts and remove shipping clamps on compres-
sors equipped with external spring vibration isolators.
Compressors are internally spring-mounted.
7. Locate and verify any accessory kit located in compressor
section.
8. Remove any access panel screws that may be difficult to
remove once unit is installed.
Step 3 — Locate Unit — The following guidelines
should be considered when choosing a location for the WSHP:
• Units are for indoor use only.
• Provide sufficient space for water and electrical
connections.
• Locate unit in an area that allows for easy access and
removal of access panels.
• Allow enough space for service personnel to perform
maintenance.
Step 4 — Mount Unit — Rod attachments must be able
to support the weight of the unit. See Tables 1 and 2 for unit op-
erating weight.
Step 5 — Connect Piping — Supply and return piping
must be as large as the unit connections on the heat pump (larg-
er on long runs). Never use flexible hoses of a smaller inside
diameter than that of the water connections on the unit. The
water-to-water series units are supplied with either a copper or
optional cupro-nickel condenser. Should your well driller ex-
press concern regarding the quality of the well water available
or should any known hazards exist in your area, Carrier recom-
mends proper testing to assure the well water quality is suitable
for use with water source equipment. In conditions anticipating
moderate scale formation or in brackish water a cupro-nickel
heat exchanger is recommended.
Both the supply and discharge water lines will sweat if sub-
ject to low water temperature. These lines should be insulated
to prevent damage from condensation.
All manual flow valves used in the system must be ball
valves. Globe and gate valves must not be used due to high
pressure drop and poor throttling characteristics.
Never exceed the recommended water flow rates. Serious
damage or erosion of the water to refrigerant heat exchanger
could occur.
Always check carefully for water leaks and repair appropri-
ately. Units are equipped with female pipe thread fittings. Con-
sult the specification sheets for sizes. Thread sealant should be
used when connecting water piping connections to the units to
insure against leaks and possible heat exchanger fouling. Do
not overtighten the connections. Flexible hoses should be used
between the unit and the rigid system to avoid possible vibra-
tion. Ball valves should be installed in the supply and return
lines for unit isolation and unit flow balancing.
WATER SUPPLY AND QUALITY — Check water supply.
Water supply should be plentiful and of good quality. See
Table 3 for water quality guidelines.
In all applications, the quality of the water circulated
through the heat exchanger must fall within the ranges listed in
the Water Quality Guidelines table. Consult a local water treat-
ment firm, independent testing facility, or local water authority
for specific recommendations to maintain water quality within
the published limits.
COOLING TOWER/BOILER APPLICATION (Fig. 4) —
To assure adequate cooling and heating performance, the cool-
ing tower and boiler fluid loop temperature should be main-
tained between 50 F and 100 F. In the cooling mode, heat is
rejected from the unit into the condenser water loop. A cooling
tower provides evaporative cooling to the loop water; thus,
maintaining a constant supply temperature to the unit. When
utilizing an open cooling tower, chemical water treatment is
mandatory to ensure the water is free of corrosive materials. A
secondary heat exchanger (plate frame between the unit and
the open cooling tower) may also be used. It is imperative that
all air is eliminated from the closed loop side of the heat
exchanger to prevent condenser fouling.
In the heating mode, heat is absorbed from the condenser
water loop to the unit. A boiler can be utilized to maintain the
loop within the proper temperature range. In milder climates a
“flooded tower” concept is often used. This concept involves
adding make-up water to the cooling tower sump to maintain
the desired loop temperature. No unit should be connected to
the supply or return piping until the water system has been
completely cleaned and flushed to remove any dirt, piping
chips or other foreign material. Supply and return hoses should
be connected together during this process to ensure the entire
system is properly flushed. After the cleaning and flushing has
taken place, the unit may be connected to the water loop and
should have all valves wide open.
Pressure/temperature ports are recommended in both the
supply and return lines for systen flow balancing. Water flow
can be accurately set by measuring the refrigerant-to-water
heat exchangers water side pressure drop.
WELL WATER SYSTEMS (Fig. 5) — Water quantity
should be plentiful, between 1.5 and 2.5 gpm per ton of cool-
ing, and of good quality. To avoid the possibility of freezing the
well water should be above 50 F.
Water pressure must always be maintained in the heat ex-
changer by placing a water control valve on the outlet of the
CAUTION
Galvanized pipe or fittings are not recommended for use
with these units due to the possible galvanic corrosion.
CAUTION
Improper heat exchanger fluid flow due to piping, valving
or improper pump operation is hazardous to the unit and
constitutes abuse which will void the heat exchanger and
compressor warranty.
IMPORTANT: Failure to comply with the above required
water quality and quantity limitations and the closed-
system application design requirements may cause damage
to the tube-in-tube heat exchanger that is not the responsi-
bility of the manufacturer.

7
water-to-water unit. A bladder type expansion tank may be
used to maintain pressure on the system.
Avoid using low voltage (24 volt) solenoids, using them
may overload the unit transformer or interfere with the lock-out
circuit. Line voltage solenoids connected across the load side
(T1, T2) of the compressor contactor are preferred.
Pilot operated or slow closing valves are recommended to
reduce water hammer.
The discharge water from the water-to-water unit is not con-
taminated in any manner and can be disposed of in various
ways depending on the local codes (i.e. discharge well, dry
well, storm sewer, drain field, stream, pond, etc.)
EARTH COUPLED GEOTHERMAL SYSTEMS
(Fig. 6) — Closed loop and pond applications require special-
ized design knowledge. No attempt at these installations
should be made unless the dealer has received specialized
training.
Utilizing the Ground Loop Pumping Package (GLP), makes
the installation easy. Anti-freeze solutions are utilized when en-
tering loop temperatures drop below 40 F or where piping will
be routed through areas subject to freezing. A flow rate be-
tween 2.5 to 3.0 gpm per nominal ton of cooling is recom-
mended for this application.
Fig. 4 — Typical Tower/Boiler Application (Source Side)
NOTE: Water and electrical connection locations vary depending on model. Connect as required per unit labels.
1—Ball Valves
2—Hose Kits
3—P/T Plugs
4—Load Side Connections*
5—Low Voltage Control Connection*
6—Vibration Pad
7—Line Voltage Disconnect
8—Supply and Return Lines of Central System

8
WATER OUT
WATER IN
2
3
8
Fig. 5 — Typical Well Water Application (Source Side)
NOTE: Water and electrical connection locations vary depending on model. Connect as required per unit labels.
1—Pressure Tank
2—Ball Valves
3—Solenoid Valve (Slow Closing)
4—Hose Kit
5—P/T Kit
6—Load Side Connections*
7—Low Voltage Control Connection*
8—Vibration Pad
9—Line Voltage Disconnect

9
Fig. 6 — Typical Earth Coupled Application (Source Side)
NOTE: Water and electrical connection locations vary depending on model. Connect as required per unit labels.
1—Polybutylene or Polyethelene with Insulation
2—Ground Loop Pumping Package (GLP)
3—Ground Loop Connection Kit
4—P/T Plugs
5—Load Side Connections*
6—Low Voltage Control Connection*
7—Vibration Pad
8—Line Voltage Disconnect

10
Table 3 — Water Quality Guidelines
LEGEND
*Heat exchanger materials considered are copper, cupronickel,
304 SS (stainless steel), 316 SS, titanium.
†Closed recirculating system is identified by a closed pressurized
piping system.
**Recirculating open wells should observe the open recirculating
design considerations.
††If the concentration of these corrosives exceeds the maximum
allowable level, then the potential for serious corrosion problems
exists.
Sulfides in the water quickly oxidize when exposed to air, requir-
ing that no agitation occur as the sample is taken. Unless tested
immediately at the site, the sample will require stabilization with a
few drops of one Molar zinc acetate solution, allowing accurate
sulfide determination up to 24 hours after sampling. A low pH and
high alkalinity cause system problems, even when both values are
within ranges shown. The term pH refers to the acidity, basicity, or
neutrality of the water supply. Below 7.0, the water is considered
to be acidic. Above 7.0, water is considered to be basic. Neutral
water contains a pH of 7.0.
To convert ppm to grains per gallon, divide by 17. Hardness in
mg/l is equivalent to ppm.
CONDITION HX
MATERIAL*
CLOSED
RECIRCULATING† OPEN LOOP AND RECIRCULATING WELL**
Scaling Potential — Primary Measurement
Above the given limits, scaling is likely to occur. Scaling indexes should be calculated using the limits below.
pH/Calcium
Hardness Method All N/A pH < 7.5 and Ca Hardness, <100 ppm
Index Limits for Probable Scaling Situations (Operation outside these limits is not recommended.)
Scaling indexes should be calculated at 150 F for direct use and HWG applications, and at 90 F for indirect HX use. A monitoring plan should be
implemented.
Ryznar Stability Index All N/A 6.0 - 7.5
If >7.5 minimize steel pipe use.
Langelier Saturation Index
All N/A
–0.5 to +0.5
If <–0.5 minimize steel pipe use.
Based upon 150 F HWG and direct well, 85 F indirect well HX.
Iron Fouling
Iron Fe2+ (Ferrous)
(Bacterial Iron Potential) All N/A
<0.2 ppm (Ferrous)
If Fe2+ (ferrous) >0.2 ppm with pH 6 - 8, O2<5 ppm check for
iron bacteria.
Iron Fouling All N/A <0.5 ppm of Oxygen
Above this level deposition will occur.
Corrosion Prevention††
pH All 6 - 8.5
Monitor/treat as needed.
6 - 8.5
Minimize steel pipe below 7 and no open tanks with pH <8.
Hydrogen Sulfide (H2S)
All N/A
<0.5 ppm
At H2S>0.2 ppm, avoid use of copper and cupronickel piping of HXs.
Rotten egg smell appears at 0.5 ppm level.
Copper alloy (bronze or brass) cast components are okay to <0.5 ppm.
Ammonia Ion as Hydrox-
ide, Chloride, Nitrate and
Sulfate Compounds
All N/A
<0.5 ppm
Maximum Chloride Levels Maximum allowable at maximum water temperature.
50 F (10 C) 75 F (24 C) 100 F (38 C)
Copper N/A <20 ppm NR NR
Cupronickel N/A <150 ppm NR NR
304 SS N/A <400 ppm <250 ppm <150 ppm
316 SS N/A <1000 ppm <550 ppm <375 ppm
Titanium N/A >1000 ppm >550 ppm >375 ppm
Erosion and Clogging
Particulate Size and
Erosion
All
<10 ppm of particles and
a maximum velocity of
6 fps.
Filtered for maximum
800 micron size.
<10 ppm (<1 ppm “sandfree” for reinjection) of particles and a maxi-
mum velocity of 6 fps. Filtered for maximum 800 micron size. Any par-
ticulate that is not removed can potentially clog components.
HWG— Hot Water Generator
HX — Heat Exchanger
N/A — Design Limits Not Applicable Consid-
ering Recirculating Potable Water
NR — Application Not Recommended
SS — Stainless Steel

11
Step 6 — Wire Electrical Connections All field wiring must comply with local and national fire,
safety and electrical codes. Power to the unit must be within the
operating voltage range indicated on the unit’s nameplate. On
three phase units, phases must be balanced within 2%.
Properly sized fuse or HACR (heating, air-conditioning,
and refrigeration) circuit breakers must be installed for branch
circuit protection. See equipment rating plate for maximum
size.
The unit is supplied with an opening for attaching conduit.
Be certain to connect the ground lead to the ground lug in the
control box. Connect the power leads as indicated on the unit
wiring diagram. See Table 4 and Fig. 7-10.
Table 4 — 50PSW Electrical Data
LEGEND
WARNING
To avoid possible injury or death due to electrical shock,
open the power supply disconnect switch and secure it in
an open position during installation. Install lockout tag.
CAUTION
Use only copper conductors for field-installed electrical
wiring. Unit terminals are not designed to accept other
types of conductors. Failure to heed this warning could
result in equipment damage.
50PSW UNIT
SIZE
VOLTAGE
(V-Ph-Hz)
COMPRESSOR MCA MAX FUSE
QTY RLA LRA
025
208/230-1-60 111.7 58.3 14.6 25
265-1-60 19.1 54.0 11.4 20
208/230-3-60 16.5 55.4 8.1 15
035
208/230-1-60 115.3 83.0 19.1 30
265-1-60 113.0 72.0 16.3 25
208/230-3-60 111.6 73.0 11.6 25
460-3-60 15.7 38.0 7.1 15
049
208/230-1-60 121.2 104.0 26.5 45
208/230-3-60 114.0 83.1 17.5 30
460-3-60 16.4 41.0 8.0 15
061
208/230-1-60 127.1 152.9 33.9 60
208/230-3-60 116.5 110.0 20.6 35
460-3-60 17.2 52.0 9.0 15
071
208/230-1-60 129.7 179.2 37.1 60
208/230-3-60 117.6 136.0 22.0 35
460-3-60 18.5 66.1 10.6 15
122
208/230-1-60 228.3 178.0 63.7 90
208/230-3-60 219.2 136.0 43.2 60
460-3-60 28.7 66.1 19.6 25
180
208/230-3-60 148.1 245.0 60.1 100
460-3-60 118.6 125.0 23.3 40
575-3-60 114.7 100.0 18.4 30
210
208/230-3-60 155.8 340.0 69.8 125
460-3-60 126.9 173.0 33.6 60
575-3-60 123.7 132.0 29.6 50
240
208/230-3-60 233.3 239.0 74.9 100
460-3-60 217.9 125.0 40.3 50
575-3-60 212.8 80.0 28.8 40
360
208/230-3-60 248.1 245.0 108.2 150
460-3-60 218.6 125.0 41.9 60
575-3-60 214.7 100.0 33.1 45
420
208/230-3-60 255.8 340.0 125.6 175
460-3-60 226.9 173.0 60.5 80
575-3-60 223.7 132.0 53.3 70
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
RLA — Rated Load Amps

12
COMPLETE C INCLUDES BUILT IN: 270-300 SECOND RANDOM START 300 SECOND DELAY ON BREAK 120 SECOND LOW PRESSURE BYPASS DEFAULT SETTINGS FOR COMPLETE C BOARD FROM FACTORY SHOWN
Fig. 7 — Unit Sizes 025-071, Single-Phase Complete C Control Board

13
COMPLETE C INCLUDES BUILT IN: 270-300 SECOND RANDOM START 300 SECOND DELAY ON BREAK 120 SECOND LOW PRESSURE BYPASS DEFAULT SETTINGS FOR COMPLETE C BOARD FROM FACTORY SHOWN
Fig. 8 — Unit Size 122, Single-Phase Complete C Control Board

14
COMPLETE C INCLUDES BUILT IN: 270-300 SECOND RANDOM START 300 SECOND DELAY ON BREAK 120 SECOND LOW PRESSURE BYPASS
DEFAULT SETTINGS FOR COMPLETE C BOARD FROM FACTORY SHOWN
Fig. 9 — Unit Sizes 025-071, 180, and 210, 3-Phase Complete C Control Board

15
COMPLETE C INCLUDES BUILT IN: 270-300 SECOND RANDOM START 300 SECOND DELAY ON BREAK 120 SECOND LOW PRESSURE BYPASS
DEFAULT SETTINGS FOR COMPLETE C BOARD FROM FACTORY SHOWN.
Fig. 10 — Unit Sizes 122 and 240-420, 3-Phase Complete C Control Board

16
PRE-START-UP
System Checkout — When the installation is complete,
follow the system checkout procedure outlined below before
starting up the system. Be sure:
1. Voltage is within the utilization range specifications of the
unit compressor and fan motor, and voltage is balanced
for 3-phase units.
2. Fuses, breakers and wire are correct size.
3. Low voltage wiring is complete.
4. Piping and system flushing is complete.
5. Air is purged from closed loop system.
6. System is balanced as required. Monitor if necessary.
7. Isolation valves are open.
8. Water control valves or loop pumps are wired.
9. Transformer switched to lower voltage tap if necessary.
10. Service/access panels are in place.
11. Control field-selected settings are correct.
FIELD SELECTABLE INPUTS
Jumpers and DIP (dual in-line package) switches on the
control board are used to customize unit operation and can be
configured in the field.
Safety Devices and the Complete C Control-
ler — Each unit is factory provided with a Complete C con-
troller that controls the compressor operation and monitors the
safety controls that protect the unit. See Fig. 11 for Complete C
sequence of operation.
Safety controls include the following:
• For single compressor models (025-071, 180 and 210),
Fig. 7 and Fig. 9
- High-pressure switch inputs are wired across the HPC ter-
minals on the control board
- Low-pressure switch inputs are wired across the LPC ter-
minals on the control board
- The standard source side freeze thermistor is wired across
the FREEZE 1 terminals on the control board. Cutting the
FREEZE 1 diode will change the freeze setting to 15 F for
the source sensor.
- The standard load side freeze thermistor is wired across
the FREEZE 2 terminals on the control board. Cutting the
FREEZE 2 diode will change the freeze setting to 15 F for
the load sensor.
• For dual compressor models (122, 240-420), Fig. 8 and
Fig. 10
- High-pressure switch inputs are wired across the HP1 and
HP2 terminals on the control board
- Low-pressure switch inputs are wired across the LP1 and
LP2 terminals on the control board
- The standard source side freeze thermister is wired across
the FREEZE 1 terminals on the control board. Cutting the
JP 1 diode will change the freeze setting to 15 F for the
source sensor.
- The standard load side freeze thermister is wired across the
FREEZE 2 terminals on the control board. Cutting the JP
2 diode will change the freeze setting to 15 F for the load
sensor.
• Optional freeze protection sensor, mounted close to con-
densing water coil, monitors refrigerant temperature
between condensing water coil and thermal expansion
valve. If temperature drops below or remains at freeze
limit trip for 30 seconds, the controller will shut down
the compressor and enter into a soft lockout condition.
The default freeze limit trip is 30 F, however this can be
changed to 15 F by cutting the R-42 resistor located on
top of DIP switch SW1.
• The optional condensate overflow protection sensor is
located in the drain pan of the unit and connected to the
‘COND’ terminal on the Complete C board.
NOTE: If freeze protection sensor is not installed, a jumper
between freeze contacts must be installed on the Complete C
board otherwise unit will not start.
The Complete C controller includes the following features:
ANTI-SHORT CYCLE TIMER — A 5-minute delay on
break timer prevents compressor short cycling.
RANDOM START — Each controller has a unique random
start delay ranging from 270 to 300 seconds to reduce the
chances of multiple units simultaneously starting after initial
power up or after a power interruption, creating a large electri-
cal spike.
LOW PRESSURE BYPASS TIMER — If the compressor is
running and the low-pressure switch opens, then the control
will keep the compressor on for 120 seconds. After 2 minutes if
the low-pressure switch remains open, the control will shut
down the compressor and enter a soft lockout. The compressor
will not be energized until the low-pressure switch closes and
the anti-short cycle time delay expires. If the low-pressure
switch opens 2 to 4 times in 1 hour, the unit will enter a hard
lockout and need to be reset.
BROWNOUT/SURGE/POWER INTERRUPTION PRO-
TECTION — The brownout protection in the Complete C
board will shut down the compressor if the incoming power
falls below 18 VAC. The compressor will remain off till the
voltage goes above 18 VAC and the anti-short cycle timer (300
seconds) times out. The unit will not go into a hard lockout.
MALFUNCTION OUTPUT — Alarm output is Normally
Open (NO) dry contact. If 24 VAC output is needed R must be
wired to the ALR-COM terminal; 24 VAC will be available on
the ALR-OUT terminal when the unit is in alarm condition. If
pulse is selected the alarm output will be pulsed. The fault out-
put will depend on the dip switch setting for “ALARM.” If it
set to “CONST,’ a constant signal will be produced to indicate
a fault has occurred and the unit requires inspection to deter-
mine the type of fault. If it is set to “PULSE,” a pulse signal is
produced and a fault code is detected by a remote device indi-
cating the fault. See LED Fault Indication below for blink code
explanations. The remote device must have a malfunction de-
tection capability when the Complete C board is set to
“PULSE.”
TEST DIP SWITCH — A test DIP switch is provided to re-
duce all time delay settings to 10 seconds during troubleshoot-
ing or verification of unit operation. Note that operation of the
unit while in test mode can lead to accelerated wear and prema-
ture failure of the unit. The “TEST” switch must be set back to
“NO” for normal operation.
FREEZE SENSOR — The freeze sensor input is active all the
time, if a freeze option is not selected the freeze terminals will
need a jumper. There are 2 configurable freeze points, 30 F and
15 F. The unit will enter a soft lockout until the temperature
climbs above the set point and the anti-short cycle time delay
has expired. The freeze sensor will shut the compressor output
down after 90 seconds of water flow loss and report a freeze
condition. It is recommended to have a flow switch to prevent
the unit from running if water flow is lost. See Fig. 12.
IMPORTANT: Jumpers and DIP switches should only
be clipped when power to control board has been turned
off.

17
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
Y1=1
V
>
18VAC
HPC = 1
LPC = 1
FRZ
> TEMP
LIM
CON
> 0
INITIAL
POWER UP T
>
ASC OR
RS SEC
TIME
> 30
SEC
TIME
> 120
SEC
COUNT= 2
Start Timer
Start Timer
CC Output = On
CC Output = O
Blink Code On Status LED
Report Alarm Fault
Hard Lockout
ALR Output = On/Pulse
Blink Code On Status LED
Soft Lockout
Record Alarm
Start Counter (If Applicable)
Start
Anti Short Cycle
Start
Random Start Up
Lockout Can Be SetTo
4 Via Dip Switch
Power/Switchs/Sensor
Status Check
Fig. 11 — Complete C Controller Sequence of Operation

18
NOTE: If unit is employing a fresh water system (no anti-
freeze protection), it is extremely important to have the
“Freeze” jumper R-42 resistor set to 30 F in order to shut down
the unit at the appropriate leaving water temperature and pro-
tect the heat pump from freezing if a freeze sensor is included.
LED FAULT INDICATION — Two LED indicators are pro-
vided:
Green: Power LED indicates 18 to 30 VAC present at the
board.
Red: Fault indicator with blink codes as follows:
• One blink—High pressure lockout
• Two blinks—Low pressure lockout
• Three blinks—Freeze sensor lockout
• Four blinks—Condensate overflow
• Five blinks—Brownout
INTELLIGENT RESET — If a fault condition is initiated,
the 5-minute delay on break time period is initiated and the unit
will restart after these delays expire. During this period the
fault LED will indicate the cause of the fault. If the fault condi-
tion still exists or occurs 2 or 4 times (depending on 2 or 4 set-
ting for Lockout DIP switch) before 60 minutes, the unit will
go into a hard lockout and requires a manual lockout reset. A
single condensate overflow fault will cause the unit to go into a
hard lockout immediately, and will require a manual lockout
reset.
LOCKOUT RESET — A hard lockout can be reset by turn-
ing the unit thermostat off and then back on when the “RE-
SET” DIP switch is set to “Y” or by shutting off unit power at
the circuit breaker when the “RESET” DIP switch is set to “R.”
NOTE: The blower motor will remain active during a lockout
condition.
COMPLETE C BOARD DEFAULT SETTINGS — The
Complete C board will come from the factory with the follow-
ing default settings:
• Freeze—“Terminals not jumped” on all the time
• Temp—30°F
• Lockout—2
• Reset—Y
• Alarm—PULSE
• Test—NO
• Dry Contact—Normally Open (NO)
CONSIDERATIONS
1. Always check incoming line voltage power supply and
secondary control voltage for adequacy. Transformer pri-
maries are dual tapped for 208 and 230 volts. Connect the
appropriate tap to ensure a minimum of 18 volts second-
ary control voltage. 24 volts is ideal for best operation.
2. Long length thermostat and control wiring leads may cre-
ate voltage drop. Increase wire gage or up-size transform-
ers may be required to ensure minimum secondary volt-
age supply.
3. Carrier recommends the following guidelines for wiring
between a thermostat and the unit: 18 GA up to 60 ft, 16
GA up to 100 ft and 14 GA up to 140 ft.
4. Do not apply additional control devices to the control cir-
cuit power supply without consulting the factory. Doing
so may void equipment warranties.
5. Check with all code authorities on requirements involv-
ing condensate disposal/over flow protection criteria.
Table 5 — Cooling Mode Operating Pressure (psig)
Table 6 — Heating Mode Operating Pressure (psig)
Freeze
Protection
Sensor
Fig. 12 — Freeze Protection Sensor
ENTERING LOAD/EVAP
TEMP (F)
ENTERING SOURCE CONDENSER TEMPERATURE (F)
75 F 85 F 95 F
Suction
Pressure
Discharge
Pressure
Suction
Pressure
Discharge
Pressure
Suction
Pressure
Discharge
Pressure
65 99-116 290-320 107-123 325-358 107-123 370-400
55 91-107 265-311 91-107 303-350 99-116 370-400
45 76- 91 265-311 76- 91 295-345 83- 99 358-390
ENTERING LOAD TEMP
(F)
ENTERING SOURCE CONDENSER TEMPERATURE (F)
40 F 60 F 80 F
Suction
Pressure
Discharge
Pressure
Suction
Pressure
Discharge
Pressure
Suction
Pressure
Discharge
Pressure
70 68-83 255-290 99-116 270-305 130-145 290-325
90 76-91 350-380 99-116 358-390 130-165 370-400
110 76-91 455-480 99-116 470-500 139-165 480-575

19
START-UP
Use the procedure outlined below to initiate proper unit
start-up.
NOTE: This equipment is designed for indoor installation
only.
Operating Limits (See Table 7)
ENVIRONMENT — This equipment is designed for indoor
installation ONLY. Extreme variations in temperature, humidi-
ty and corrosive water or air will adversely affect the unit per-
formance, reliability and service life.
POWER SUPPLY — A voltage variation of ± 10% of name-
plate utilization voltage is acceptable.
NOTE: These operating conditions are not normal or continu-
ous operating conditions. It is assumed that start-up is for the
purpose of bringing the building space up to occupancy
temperature.
Table 7 — 50PSW Unit Operating Limits
Unit Start-Up
1. Set the primary controller to the highest setting.
2. Set the primary controller system switch to “COOL.” The
reversing valve solenoid should energize. The compres-
sor should not run.
3. Reduce the primary controller setting approximately 5
degrees below return fluid temperature.
4. Verify the heat pump is operating in the cooling mode.
5. Check the cooling refrigerant pressures against the values
listed in Table 5.
6. Turn the primary controller system switch to the “OFF”
position. The unit should stop running and the reversing
valve should de-energize.
7. Leave the unit off for approximately (5) minutes to allow
for system equalization.
8. Turn the primary controller to the lowest setting.
9. Set the primary controller switch to “HEAT.”
10. Increase the primary controller setting approximately 5
degrees above the return fluid temperature.
11. Verify the heat pump is operating in the heating mode.
12. Check the heating refrigerant pressures against the values
listed in Table 6.
13. Set the primary controller to maintain the desired return
fluid temperature.
14. Check for vibrations, leaks, etc.
15. Instruct the owner on the unit and control operation.
Scroll Compressor Rotation — It is important to be
certain compressor is rotating in the proper direction. To
determine whether or not compressor is rotating in the proper
direction:
1. Connect service gages to suction and discharge pressure
fittings.
2. Energize the compressor.
3. The suction pressure should drop and the discharge
pressure should rise, as is normal on any start-up.
If the suction pressure does not drop and the discharge
pressure does not rise to normal levels:
1. Turn off power to the unit. Install disconnect tag.
2. Reverse any two of the unit power leads.
3. Reapply power to the unit and verify pressures are cor-
rect. The suction and discharge pressure levels should
now move to their normal start-up levels.
After a few minutes of reverse operation, the scroll com-
pressor internal overload protection will open, thus activating
the unit lockout. This requires a manual reset. To reset, turn the
thermostat on and then off.
NOTE: There is a 5-minute time delay before the compressor
will start.
Cleaning and Flushing — Cleaning and flushing of
the piping system is the single most important step to ensure
proper start-up and continued efficient operation of the system.
Follow the instructions below to properly clean and flush
the system:
1. Verify electrical power to the unit is disconnected and
lockout tag installed.
2. Install the system with the supply hose connected directly
to the return riser valve. Use a single length of flexible
hose.
3. Open all air vents. Fill the system with the water. DO
NOT allow system to overflow. Bleed all air from the
system. Pressurize and check the system for leaks and re-
pair appropriately.
4. Verify all strainers are in place. Start the pumps, and sys-
tematically check each vent to ensure all air is bled from
the system.
5. Verify make-up water is available. Adjust make-up water
appropriately to replace the air which was bled from the
system. Check and adjust the water/air level in the expan-
sion tank.
6. Raise the loop temperature to approximately 85F. Open
the drain at the lowest point in the system. Adjust the
make-up water replacement rate to equal the rate of bleed.
7. Refill the system and add trisodium phosphate in a pro-
portion of approximately one pound per 150 gal. of water
(or other equivalent approved cleaning agent).
WARNING
When the disconnect switch is closed, high voltage is pres-
ent in some areas of the electrical panel. Exercise caution
when working with the energized equipment.
WATER LIMITS COOLING
(F)
HEATING
(F)
SOURCE COIL
Min Entering Water 50 20
Normal Entering Water 85 60
Max Entering Water 110 70
LOAD COIL
Min Entering Water 50 60
Normal Entering Water 60 100
Max Entering Water 90 120
CAUTION
When the compressor is rotating in the wrong direction, the
unit makes an elevated level of noise and does not provide
cooling. Damage to compressor will occur if allowed to
operate in this manner.
WARNING
To avoid possible injury or death due to electrical shock,
open the power supply disconnect switch and secure it in
an open position before flushing system. Install lockout
tag.

20
Raise the loop temperature to 100F. Circulate the solu-
tion for a minimum of 8 to 24 hours. At the end of this
period, shut off the circulating pump and drain the solu-
tion. Repeat system cleaning if desired.
8. When the cleaning process is complete, remove the short-
circuited hose. Reconnect the hoses to the proper supply,
and return the connections to each of the units. Refill the
system and bleed off all air.
9. Test the system pH with litmus paper. The system water
should be slightly alkaline (pH of 7.5 to 8.5). Add chemi-
cals, as appropriate, to maintain acidity levels.
10. When the system is successfully cleaned, flushed, refilled
and bled, restore power.
11. Check the main system panels, safety cutouts and alarms.
Set the controls to properly maintain loop temperatures.
Antifreeze — In areas where entering loop temperatures
drop below 40 F or where piping will be routed through areas
subject to freezing, antifreeze is needed.
Alcohols and glycols are commonly used as antifreeze
agents. Freeze protection should be maintained to 15 F below
the lowest expected entering loop temperature. For example, if
the lowest expected entering loop temperature is 30 F, the leav-
ing loop temperature would be 22 to 25 F. Therefore, the freeze
protection should be at 15 F (30 F – 15 F = 15 F).
Calculate the total volume of fluid in the piping system. See
Table 8. Use the percentage by volume in Table 9 to determine
the amount of antifreeze to use. Antifreeze concentration
should be checked from a well mixed sample using a hydrome-
ter to measure specific gravity.
FREEZE PROTECTION SELECTION — The freeze sensor
input is active all the time, if a freeze option is not selected the
freeze terminals will need a jumper. There are 2 configurable
freeze points, 30 F and 15 F. The unit will enter a soft lockout
until the temperature climbs above the set point and the anti-
short cycle time delay has expired. The freeze sensor will shut
the compressor output down after 90 seconds of water flow
loss and report a freeze condition. It is recommended to have a
flow switch to prevent the unit from running if water flow is
lost.
Table 8 — Approximate Fluid Volume (gal.)
per 100 Ft of Pipe
LEGEND
NOTE: Volume of heat exchanger is approximately 1.0 gallon.
Table 9 — Antifreeze Percentages by Volume
Cooling Tower/Boiler Systems — These systems
typically use a common loop maintained at 60 to 90 F. The use
of a closed circuit evaporative cooling tower with a secondary
heat exchanger between the tower and the water loop is recom-
mended. If an open type cooling tower is used continuously,
chemical treatment and filtering will be necessary.
Ground Coupled, Closed Loop and Plateframe
Heat Exchanger Well Systems — These systems al-
low water temperatures from 30 to 110 F. The external loop
field is divided up into 2 in. polyethylene supply and return
lines. Each line has valves connected in such a way that upon
system start-up, each line can be isolated for flushing using
only the system pumps. Air separation should be located in the
piping system prior to the fluid re-entering the loop field.
OPERATION
Power Up Mode — The unit will not operate until all the
inputs, terminals and safety controls are checked for normal
operation.
NOTE: The compressor will have a 5-minute anti-short cycle
upon power up.
Units with Aquazone™ Complete C Con-
trol — The controller will memorize the last mode used be-
fore power is removed and will run in that mode after it is
turned on. In all modes the control will display temperature de-
gree differential setting for 5 seconds once it is powered and
this setting may be adjusted during this time. Thereafter the
display will switch to the monitored water temperature. When
switching from one mode to another the set point (the decimal
point is used to distinguish it from water temperature) for the
new mode is displayed for 5 seconds and then monitored water
temperature. During this time the set point may be adjusted.
Off Mode — In the OFF mode all outputs are disabled and
mode indication LED’s will be off.
The control will first display temperature differential setting
with the ability for the user to adjust it and then will display
“OFF” and finally water temperature.
CAUTION
To avoid possible damage to a plastic (PVC) piping sys-
tem, do not allow temperatures to exceed 110 F.
CAUTION
DO NOT use “Stop Leak” or any similar chemical agent in
this system. Addition of these chemicals to the loop water
will foul the system and inhibit unit operation.
IMPORTANT: All alcohols should be pre-mixed and
pumped from a reservoir outside of the building or
introduced under water level to prevent alcohols from
fuming.
PIPE DIAMETER (in.) VOLUME (gal.)
Copper 14.1
1.25 6.4
1.5 9.2
Rubber Hose 13.9
Polyethylene 3/4IPS SDR11 2.8
1 IPS SDR11 4.5
11/4IPS SDR11 8.0
1/2IPS SDR11 10.9
2 IPS SDR11 18.0
11/4IPS SCH40 8.3
11/2IPS SCH40 10.9
2 IPS SCH40 17.0
IPS — Internal Pipe Size
SCH — Schedule
SDR — Standard Dimensional Ratio
ANTIFREEZE
MINIMUM TEMPERATURE FOR
FREEZE PROTECTION (F)
10 15 20 25
Methanol (%) 25 21 16 10
100% USP Food Grade
Propylene Glycol (%) 38 30 22 15