Bard PH1224 User manual

INSTALLATION INSTRUCTIONS
SINGLE PACKAGE
HEAT PUMPS
MODELS
PH1224
PH1230
PH1236
Manual : 2100-344
File: Volume II Tab 11
Date: 08-21-98
Bard Manufacturing Company
Bryan, Ohio 43506
Since 1914...Moving ahead, just
as planned. © Copyright1998

Contents
Getting Other Informations and Publications ........ 1
General Instructions................................................. 3
Important ................................................................ 3
Shipping Damage .................................................... 3
General ................................................................ 3
Field-InstalledHeaterPackages(Optional).............. 3
Installation................................................................. 5
Location ................................................................ 5
TypicalInstallations .................................................. 5
Condensate Drain Trap ............................................ 8
AirFilters ................................................................ 8
Wiring – Main Power................................................ 9
Wiring – 24V Low Voltage Control Circuit ................ 9
Thermostats........................................................... 10
Thermostat Indicator Lamps ...................................11
Emergency Heat Position .......................................11
Transformer Taps....................................................11
Compressor Cut-Off Thermostat and Outdoor
Thermostat Wiring ..................................................11
Start Up and Operation .......................................... 12
Three Phase Scroll Compressor Start Up
Information............................................................. 12
Sequence of Operation.......................................... 12
Defrost Cycle ......................................................... 12
Start Up Notes ....................................................... 12
Service and Troubleshooting ................................ 14
ServiceHints.......................................................... 14
Pressure Service Ports .......................................... 14
Refrigerant Charge ................................................ 14
Fan Blade Settings................................................. 14
Solid State Heat Pump Control
Troubleshooting Procedure .................................... 14
Troubleshooting Guide ........................................... 15
Checking Temperature Sensor Check Out............. 16
Temperature vs. Resistance of
Temperature Sensor Chart..................................... 16
Suction and Discharge Tube Brazing..................... 17
PressureTables ..................................................... 18
Wiring Diagrams ............................................. 19 - 21
Figures
Figure 1 Prefabricated Rood Curb
Specifications .......................................... 4
Figure 2 Field FabricatedCurbing ......................... 4
Figure 3 Elevated Mounting Platforms .................. 6
Figure 4 Airflow and Service Access
Clearances .............................................. 6
Figure 5 Roof Top Application ............................... 7
Figure 6 Slab Mounting at Ground Level ............... 7
Figure 7 Condensate Drain Trap ........................... 8
Figure 8 Low Voltage Wiring ................................. 9
Figure 9 Compressor Cut-Off Thermostat
Wiring (5 and 10 KW) ............................11
Figure 10 Compressor Cut-Off Thermostat
Wiring )15 KW ONLY) ...........................11
Figure 11 Heat Pump Control Board..................... 13
Figure 12 Fan Blade Setting Dimensions .............. 14
Figure 13 Brazing Diagram ................................... 17
Tables
Table 1 Electrical Data......................................... 2
Table 2 OptionalFieldInstalledHeater
Packages ................................................ 2
Table 3 Optional Field Installed Heater Table ....... 2
Table 4 Rated CFM and Rated ESP.................... 3
Table 5 Air Filter Area and Size ........................... 8
Table 6 Thermostat Wire Size ............................. 9
Table 7 Heat Pump Thermostats ....................... 10
Table 8 Volts, KW and Phase - Compressor
Cut-Off Wiring (5 and 10 KW)...............11
Table 9 Volts, KW and Phase - Compressor
Cut-Off Wiring (15 KW ONLY0 .............11
Table 10 Refrigerant Charge ............................... 14
Table 11 Pressure Table - Cooling ....................... 18
Table 12 Pressure Table - Heating....................... 18

Manual 2100-344
Page 1
Getting Other Information and Publications
These publications can help you install the air conditioner or
heat pump. You can usually find these at your local library
or purchase them directly from the publisher. Be sure to
consult current edition of each standard.
National Electrical Code ...........................ANSI/NFPA 70
Standard for the Installation......................ANSI/NFPA 90A
of Air Conditioning and
Ventilating Systems
Standard for Warm Air .............................ANSI/NFPA 90B
Heating and Air
Conditioning Systems
Load Calculation for .................................ACCA Manual J
Residential Winter and
Summer Air Conditioning
Duct Design for Residential......................ACCA Manual D
Winter and Summer Air Conditioning
and Equipment Selection
Commercial Low Pressure, .......................ACCA Manual Q
Low Velocity Duct System Design
Load Calculation For Commercial ............ACCA Manual N
Summer and Winter Air Conditioning
For more information, contact these
publishers:
ACCA —Air Conditioning Contractors of America
1712 New Hampshire Ave. N.W.
Washington, DC 20009
Telephone: [phone]
Fax: [phone]
ANSI —American National Standards Institute
11 West Street, 13th Floor
New York, NY 10036
Telephone: [phone]
Fax: [phone]
ASHRAE —American Society of Heating
Refrigerating, and
Air Conditioning Engineers, Incorporated
1791 Tullie Circle, N.E.
Atlanta, GA 30329-2305
Telephone: [phone]
Fax: [phone]
NFPA —National Fire Protection Association
Batterymarch Park
P.O. Box 9101
Quincy, MA 02269-9901
Telephone: [phone]
Fax: [phone]

Manual 2100-344
Page 2
IMPORTANT: While this electrical data is presented as a guide, it is important to electrically connect properly size fuses
and conductor wires in accordance with the National Electrical Code and all existing local codes.
TABLE 2
OPTIONAL FIELD INSTALLED HEATER PACKAGES
ONLY TO BE USED WITH THE HEAT PUMP MODELS INDICATED
egakcaPretaeH .oNledoM dnastloV esahP4221HP0321HP6321HPB-6321HP
50A-CP3HE 01A-BP3HE 01A-CP3HE 51A-CP3HE
1/042
X
X
X
X
X
X
X
X
90B-BP3HE 51B-BP3HE 3/042 X
X
TABLE 3
OPTIONAL FIELD-INSTALLED ELECTRIC HEATER TABLE
retaeH ledoM.gkP .oN stloVtinU esahP
&WK.rtH yticapaC
@ ro(V042 fiV084 )elbacilppa
&WK.rtH yticapaC
@ stloV802
@ V042 saV084ro elbacilppa spmA.rtH
retaeH lanretnI sesuF
BtiucriC
.oN dleiF .stkC muminiM tiucriC yticapmA mumixaM tnerrucrevO noitcetorP dleiF rewoP gniriW dnuorG eriW eziSWKHUTBWKHUTB
01A-BP3HE 1-802/04201001,4305.7000,627.1413506601
50A-CP3HE 01A-CP3HE 51A-CP3HE
1-802/042 1-802/042 1-802/042 5
0151
001,71 001,43 002,15 57.3 05.7 52.11 008,21 000,62 004,83 8.02 7.14 5.2606/03 1
1
1
623597 030608 01
6
4
0101
8
90B-BP3HE 51B-BP3HE 3-802/042 3-802/042 9
51 007,03 002,15 57.6 52.11 000,32 004,83 7.12 2.63 1 18264 0305 01 80101
Q
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S
Time delayfuses or“HACR”typecircuit breakersmust beusedfor 60and smallersizes. Standard fuses
orcircuit breakers are suitablefor sizes 70 andlarger. 480Vcircuit breakersare not “HACR”type.
Basedon wire suitable for75°C. Other wiring materials mustbe rated formarked“Minimum Circuit
Ampacity”orgreater.
Basedupon Table 250-95 of N.E.C.1993. See electrical data forbasic heat pump for CircuitA wiring
specificationrequirements.
Maximumtime delay fuseor HACR typecircuit breaker. HACR type notapplicable to 460volt.
75degree C cooperwire size, basicunit only.
Q
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TABLE 1
ELECTRICAL DATA
ledoM
detaR &stloV sesahP gnitarepO egatloV egnaR mumixaM spmAtinU
mumixaM lanretxE rosesuF .krB.tkC
muminiM tiucriC yticapmA dleiF rewoP gniriW dnuorG eziSeriW
A.tkCA.tkCA.tkCA.tkC
4221HP1-802/032352-7914.4152810101
0321HP1-802/032352-7917.7103220101
6321HP1-802/032352-7918.12047288
B-6321HP3-802/032352-7916.5152910101
QRS
Q
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Manual 2100-344
Page 3
TABLE 4
RATED CFM AND
EXTERNAL STATIC PRESSURE (ESP)
WET COIL (COOLING)
ledoM detaR MFC detaR PSE dednemmoceR egnaRwolFriA
4221HP00802.MFC088-086
0321HP000103.MFC0011-577
6321HP001102.MFC0121-577
GENERAL INSTRUCTIONS
IMPORTANT
The equipment covered in this manual is to be installed by
trained, experienced service and installation technicians.
Any heat pump is more critical of proper operating charge
and an adequate duct system than a straight air conditioning
unit. All duct work, supply and return ducts, must be
properly sized for the design air flow requirement of the
equipment. ACCA is an excellent guide to proper sizing.
All duct work or portions thereof not in the conditioned
space should be properly insulated in order to both conserve
energy and prevent condensation or moisture damage.
SHIPPING DAMAGE
Upon receipt of equipment, the carton should be checked for
external signs of shipping damage. If damage is found, the
receiving party must contact the last carrier immediately,
preferably in writing, requesting inspection by the carrier’s
agent.
GENERAL
The refrigerant system is completely assembled and
charged. All internal wiring is complete.
The unit is designed for use with or without duct work.
Flanges are provided for attaching the supply and return
ducts.
These instructions explain the recommended method to
install the air cooled self-contained unit and the electrical
wiring connections to the unit.
These instructions and any instructions packaged with any
separate equipment required to make up the entire heat
pump system should be carefully read before beginning the
installation. Note particularly “Starting Procedure” and any
tags and/or labels attached to the equipment.
While these instructions are intended as a general
recommended guide, they do not supersede any national
and/or local codes in any way. Authorities having
jurisdiction should be consulted before the installation is
made.
Refer to the electrical data shown on pages 2 and 3 for
proper application information on all available heater
combinations and what units they can be used with. It also
shows the applicable circuit ampacities, fuse size, and wire
size for each heater combination.
Refer to the installation instructions packed with the heater
for details on how to insert it into the basic unit.
FIELD INSTALLED HEATER PACKAGES
(OPTIONAL)
These packaged heat pumps are manufactured without
supplementary electric heaters. Supplementary heaters
EH3P series (to fit PH1224, PH1230, and PH1236) are
available for simple, fast, field installation.
A separate field power circuit is required for the
supplementary heaters.
IMPORTANT: Refer to Table 4 when designing duct
work for maximum available static
pressure with heater installed.

Manual 2100-344
Page 4
MIS-1177
FIGURE 1
PREFABRICATED ROOF CURB SPECIFICATIONS
HEAVY GAUGE GALVANIZED WITH WOOD NAILING STRIP, WELDED/LEAKPROOF
ONE PIECE CONSTRUCTION – READY TO INSTALL
FIGURE 2
FIELD FABRICATED CURBING
CURBANDROOFDETAILS
*DuctSizing Information
Return Air Dimension “C”is length Supply Air Dimension“C”islength
Return Air Dimension “H”is width Supply SirDimension “J”iswidth
fooR bruCAB*CDEF *J*HdooHfooR ledoM gninoitidnoCriA
stinU
300-24098/3-084/1-044/1-738/3-838/3-53244/3-418/1-9106EHR ,0321HP,4221HP 6321HP
MIS-1178
dooHfooR ledoM tinU ledoM E
63EHR 4221HP 0321HP 6321HP 14

Manual 2100-344
Page 5
INSTALLATION
LOCATION
GENERAL
The unit must be located outside, or in a well ventilated
area. It must not be in the space being heated or cooled. A
sound absorbing material should be considered if the unit is
to be installed in such a position or location that might cause
transmission of sound or vibration to the living area or
adjacent buildings.
SLAB MOUNTING
In areas where winter temperatures DO NOT go below
32° F for periods over twelve hours, the unit may be slab
mounted at grade level. When installing unit at grade level,
install on a concrete slab at least four inches above finished
grade level. Slab should have a slope tolerance away from
the building structure of at lease 1/4 inch per foot, while
being level from side to side. This will prevent ice buildup
under the unit during defrost cycles. Place slab in a location
where runoff water from higher ground will not collect
around unit. See Figure 3.
A minimum of 18 inches should be provided between the
coil inlet and any building surfaces. Provide at least four
feet between coil outlet and any building wall, fences or
other vertical structures. Provide a minimum of three feet
clearance on the service access side of the unit. See
Figure 4
ROOF MOUNTING
When a unit is installed in areas where low ambient
temperatures or strong winter winds exist, it should be
placed so prevailing winter winds are not in direct line with
the heat pump coil. If this is not possible, a wind barrier
should be constructed. Place barrier 24 inches from the coil
inlet side of the unit and in the direction of prevailing winds.
Size barrier at least the same height and width as the unit.
This may be necessary on ground level installations, also.
See Figure 5.
WINTER INSTALLATION BELOW 32°F
In areas where winter conditions go below 32°F for
extended periods, the unit must be elevated above the
mounting surface to prevent snowfall or defrost ice
accumulation from interfering with the operation of the unit.
A minimum of twelve inch elevation is recommended, while
greater elevation may be required for areas of high snow
accumulation. Poured concrete, steel framework, brick,
cement block, etc., can be utilized to construct a suitable
raised mounting platform. See Figure 6.
DUCT WORK
Refer to Tables 4, 5 and 5A when designing duct work for
maximum static pressure available with the specific model
and heater package being installed. Unit duct work is
suitable for 0” clearance to combustible materials.
necessary to dispose of the condensate from the outdoor
coil on the heating cycle, and this is virtually impossible
with the unit installed inside the crawl space.
3.
SLAB MOUNTED AT GROUND LEVEL –This
type installation is ideal for homes with a slab floor
construction where a roof mounted unit is not desired.
The supply and return duct work can be run through a
furred closet space.
4.
THROUGH THE WALL – This type installation
requires a suitable framework to be fabricated capable of
withstanding the unit weight. Normally the unit will be
insulated so as to minimize supply and return duct work.
5.
OTHER INSTALLATIONS – Many other
installations are possible with the packaged heat pump.
No matter what the installation, always consider the
following facts:
A. Insure that the discharge air is not obstructed in any
way so as to cause operation difficulties.
B. The indoor coil drain pan is equipped with a
coupling that must be piped through a condensate
drain trap to a suitable drain.
C. Always mount the unit is such a position that it may
be easily reached for servicing and maintenance.
D. Insure that the unit is clear so that proper air flow
over the outdoor coil will be maintained.
If this unit is operated in cooling below a 65° outdoor
ambient temperature, the installation of low ambient
controls (CMA-6) to unit is required.
TYPICAL INSTALLATIONS
1. ROOF MOUNTED – The unit is mounted on a
sturdy base on the roof of the building. Return air to the
unit is brought through a single return grille (grilles with
built-in filters are best since they enable easy access for
filter changing). Return air ducts are attached to the
lower section of the front panel. Supply air is brought
from the unit to attic duct work or to a furred down hall.
Supply air duct is attached to the top of the front panel.
CAUTION: All outdoor duct work must be thoroughly
insulated and weatherproofed. All attic duct work
must be thoroughly insulated. Two inch thick
insulation with suitable vapor barrier is
recommended for both outdoor and attic runs.
In roof top installation, as in all installations, the heat
pump must be level from side to side. However, the unit
should have a pitch along the length to assure complete
external drainage of precipitation and of defrost
condensate.
2.
CRAWL SPACE – Duct work installed in crawl
space must be well insulated and provided with a vapor
barrier. In addition, the crawl space must be thoroughly
ventilated and provided with a good vapor barrier as a
ground cover. It is most desirable to install the unit
outdoors rather than inside the crawl space, so that it
will be readily accessible for service. In addition, it is

Manual 2100-344
Page 6
FIGURE 3
ELEVATED MOUNTING PLATFORMS
MIS-1183
MIS-1185
FIGURE 4
AIRFLOW and SERVICE ACCESS CLEARANCES

Manual 2100-344
Page 7
FIGURE 5
ROOF TOP APPLICATION
(May also be required for ground level installations.)
MIS-1176
FIGURE 6
SLAB MOUNTING AT GROUND LEVEL
(Above 32° F Outside Temperature)
MIS-1184

Manual 2100-344
Page 8
FIGURE 7
CONDENSATE DRAIN TRAP
MIS-136
maintained for proper operation. If this is not done,
excessive energy use, poor performance, and multiple
service problems will result. It is impossible to oversize air
filters. Generous sizing will result in cleaner air and coils
as well as lower operating costs and extend the time
between required changes. Table 6 shows minimum filter
areas and recommended filter sizes. Actual filter sizes can
vary with the installation due to single or multiple returns
utilizing a filter/grille arrangement or being placed
immediately ahead of the indoor coil face in the return air
duct.
CONDENSATE DRAIN TRAP
It is very important to provide a trap in the condensate drain
line to allow a positive liquid seal in the line and assure
correct drainage from the coil condensate pan.
Install condensate drain trap shown in Figure 7. Use drain
connection size or larger. Do not operate unit without trap.
Unit must be level or slightly inclined toward drain. With a
trap installed on a unit located in an unconditioned area,
water in the trap may freeze. It is recommended that the trap
material be of a type that will allow for expansion of water
when it freezes.
AIR FILTERS
Air filters for the return air side of the system are not
provided as part of the various types of applications for these
models, and must be field supplied and installed as part of
the final installation.
Prior thought should be given to return air location and
placement of the air filter(s). The air filter(s) must be of
adequate size and readily accessible to the operator of the
equipment. Filters must be adequate in size and properly
TABLE 5
NOTE: If roof hood accessory is to be used, information
on air filters may be found under that heading in this
manual. Air filters are supplied as part of that package.
ledoM retliFmuminiM saerA dednemmoceR eziS
4221HP 0321HP 6321HP
sehcnierauqs264 )teeferauqs12.3( 1x8/5-03x51

Manual 2100-344
Page 9
TABLE 6 – THERMOSTAT WIRE SIZE
remrofsnarT AV ALF eriW eguaG htgneLmumixaM teeFnI
553.20281614121 5406 001 061 052
WIRING – MAIN POWER
Refer to the unit rating plate for wire sizing information and
maximum fuse size. Each outdoor unit is marked with a
“Minimum Circuit Ampacity”. This means that the field
wiring used must be sized to carry that amount of current. If
field installed heaters are added to the basic unit, a second
separate power supply circuit will be required. The heater
rating plate located adjacent to the basic unit rating plate
will show the appropriate circuit ampacity fuse size, etc.
(Also see “Electrical Data” on pages 2.) All models are
suitable for connection with copper wire only. These
instructions must be adhered to. Refer to the National
Electrical Code for complete current carrying capacity data
on the various insulation grades of wiring material.
The electrical specifications on page 2 lists fuse and wire
sizes (75° F copper) for all models including the most
commonly used heater sizes.
The unit rating plate lists a “Maximum Time Delay Fuse” or
“HACR” type circuit breaker that is to be used with the
equipment. The correct size must be used for proper circuit
protection and also to assure that there will be no nuisance
tripping due to the momentary high starting current of the
compressor.
WIRING – 24V LOW VOLTAGE CONTROL
CIRCUIT
Ten (10 ) wires should be run from thermostat subbase to
the 24V terminal board in the unit. A ten conductor,
18 gauge copper, color-coded thermostat cable is
recommended. The connection points are shown in
Figure 8.
FIGURE 8 – LOW VOLTAGE WIRING
MIS-1187

Manual 2100-344
Page 10
TABLE 7
HEAT PUMP THERMOSTATS
TATSOMREHTESABBUSNOITPIRCSED
540-3048 )1671A148T( fotraP tatsomrehT
revoegnahclaunaM;blubyruceM;taehegats2,loocegats1 looC-ffO-taeH-taeHmE:hctiwSmetsyS;nO-otuA:hctiwSnaF taeHxuA-taeHmE-kcehC:spmaLgnitacidnI
710-3048 )9211R478T( 900-4048 1811L476Q
revoegnahclaunaM;blubyrucreM;taehegats2,loocegats1 looC-ffO-taeH-taeHmE:hctiwSmetsyS;nO-otuA:hctiwSnaF taeHmE-kcehC:spmaLgnitacidnI
810-3048 )4201N478T( 010-4048 1621F476Q
revoegnahcotuA;blubyrucreM;taehegats2,loocegats1 looC-otuA-taeH-taeHmE-ffO:hctiwSmetsyS;nO-otuA:hctiwSnaF taeHmE-kcehC:spmaLgnitacidnI
240-3048 )0701G1158T( fotraP tatsomrehT
)deriuqeryrettabon(elbammargorp-nonlatigiD;taehegats2,loocegats1 revoegnahclaunamrocitamotuA taeH/looCrootuA-taeHmE-ffO:hctiwSmetsyS;nO-otuA:hctiwSnaF taeHxuA-taeHmE:noitacidnIyalpsiDkcehC:spmaLgnitacidnI
430-3048 )08-49F1( fotraP tatsomrehT
pukcabyrettaB;)yad7(elbammargorplatigiD;taehegats2,loocegats2 sruoh42repdoirepkcab-tes/pu-tes1;revoegnahclaunamrocitamotuA yrevocerygrenerorezimonoceroflanimretnoitalitnevelbammargorP taeH/looCrootuA-taeHmE-ffO:hctiwSmetsyS;nO-otuA:hctiwSnaF xuA-flaM-pmuP-remE:spmaLgnitacidnI
720-3048 )17-29F1( fotraP tatsomrehT
pukcabyrettaB;)yad2/yad5(elbammarforplatigiD;taehegats3,loocegats2 sruoh42repsdoirepkcab-tes/spu-tes4:revoegnahclaunamrocitamotuA taeH/looCrootuA-taeHmE-ffO:hctiwSmetsyS;nO-otuA:hctiwSnaF xuA-flaM-pmuP-remE:spmaLgnitacidnI
Noautomaticchangeoverposition–mustbemanuallyplacedinheatorcool. Reversingvalveremainsenergized
atalltimessystemswitchisinheatposition(exceptduringdefrostcycle). Nopressureequalizationnoisewhen
thermostatissatisfiedoneitherheatingorcooling.
Allowsthermostat tocontrol both heatingand coolingoperationwhen setin “AUTO”position. Reversingvalvede-
energizesat end ofeach “ON”heatingcycle.
Q
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THERMOSTATS
See specific wiring information for the different models, heater KWs, and voltages.
Q
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Manual 2100-344
Page 11
COMPRESSOR CUTOFF THERMOSTAT
WIRING (15 KW ONLY)
FIGURE 9
UNIT 24V TERMINAL BOARD
MIS-1188
FIGURE 10
UNIT 24V TERMINAL BOARD
MIS-1189
TABLE 8
5 and 10 KW
ledoMWKstloVesahP
4221HP01,5,00321
0321HP01,5,00321
6321HP01,5,00321
TABLE 9
15 KW ONLY
ledoMWKstloVesahP
0321HP510321
6321HP510321
COMPRESSOR CUTOFF THERMOSTAT
WIRING (5 and 10 KW)
COMPRESSOR CUTOFF THERMOSTAT
and OUTDOOR THERMOSTAT WIRING
Heat pump compressor operation at outdoor temperatures
below 0° F are neither desirable nor advantageous in terms
of efficiency. Since most equipment at time of manufacture
is not designated for any specific destination of the county
and most of the equipment is installed in areas not
approaching the lower outdoor temperature range, the
compressor cutoffs are not factory installed.
Outdoor thermostats are available to hold off various banks
of electric heat until needed as determined by outdoor
temperature. The set point of either type of thermostat is
variable with geographic region and sizing of the heating
equipment to the structure. Utilization of the Heating
Application Data and the heat loss calculation of the
building are useful in determining the correct set points.
TRANSFORMER TAPS
230/208V, 1 phase and 3 phase equipment employ dual
primary voltage transformers. All equipment leaves the
factory wired on 240V tap. For 208V operation, reconnect
from 240V to 208V tap. The acceptable operating voltage
range for the 240 and 208V taps are:
TAP RANGE
240 253 – 216
208 220 – 187
NOTE: The voltage should be measured at the field power
connection point in the unit and while the unit is
operating at full load (maximum amperage
operating condition).
THERMOSTAT INDICATOR LAMPS
The red lamp marked “EM. HT.” comes on and stays on
whenever the system switch is placed in Em. Ht. position.
The green lamp marked “Check” will come on if there is any
problem that prevents the compressor from running when it
is supposed to be.
EMERGENCY HEAT POSITION
The operator of the equipment must manually place the
system switch in this position. This is done when there is a
known problem with the outdoor section, or when the green
“Check” lamp comes on indicating a problem.
REMOVE FACTORY
JUMPERY-Y1
OUTDOOR THERMOSTAT
USED AS COMPRESSOR CUTOFF
REMOVE FACTORY
JUMPERY-Y1
OUTDOOR THERMOSTAT
USED AS COMPRESSOR CUTOFF

Manual 2100-344
Page 12
START UP AND OPERATION
the reversing valve solenoid constantly whenever the system
switch on subbase is placed in “Heat” position, the “B”
terminal being constantly energized from R. A thermostat
demand for heat completes R-Y circuit, pulling in
compressor contactor starting compressor and outdoor
motor. R-G also make starting indoor blower motor.
DEFROST CYCLE
The defrost cycle is controlled by temperature and time on
the solid state heat pump control.
When the outdoor temperature is in the lower 40° F
temperature range or colder, the outdoor coil temperature is
32°F or below. This temperature is sensed by the coil
sensor mounted near the bottom of the outdoor coil. Once
the coil temperature reaches 32°F or below, the coil sensor
sends a signal to the control logic of the heat pump control
and defrost timer will start.
After 60 (90 or 30) minutes at 32°F or below, the heat pump
control will place the system in the defrost mode.
During the defrost mode, the refrigerant cycle switches back
to the cooling cycle, the outdoor motor stops, electric heaters
are energized, and hot gas passing through the outdoor coil
melts any accumulated frost. When the temperature rises to
approximately 57° F, the coil sensor will send a signal to the
heat pump control which will return the system to heating
operations automatically.
If some abnormal or temporary condition such as a high
wind causes the heat pump to have a prolonged defrost
cycle, the heat pump control will restore the system to
heating operation automatically after 10 minutes.
There are three settings on the heat pump control -- 30
minutes, 60 minutes, and 90 minutes. Most models are
shipped wired on the 60 minutes setting for greatest
operating economy. If special circumstances require a
change to another time, remove wire connected to terminal
60 and reconnect to desired terminal. (See Figure 11.)
There is a cycle speed up jumper on the control. This can be
used to reduce the time between defrost cycle operation
without waiting for time to elapse.
There is an initial defrost (sen jmp) jumper on the control
that can be used at any outdoor ambient during the heating
cycle to simulate a 0° coil temperature. This can be used to
check defrost operation of the unit without waiting for the
outdoor ambient to fall into the defrost region.
START UP NOTES
For improved start up performance, wash the indoor coil
with dishwasher detergent
THREE PHASE SCROLL COMPRESSOR
START UP INFORMATION
Scroll compressors, like several other types of compressors,
will only compress in one rotational direction. Direction of
rotation is not an issue with single phase compressors since
they will always start and run in the proper direction.
However, three phase compressors will rotate in either
direction depending upon phasing of the power. Since there
is a 50-50 chance of connecting power in such a way as to
cause rotation in the reverse direction, verification of proper
rotation must be made. Verification of proper rotation
direction is made by observing that suction pressure drops
and discharge pressure rises when the compressor is
energized. Reverse rotation also results in an elevated
sound level over that with correct rotation, as well as,
substantially reduced current draw compared to tabulated
values.
Verification of proper rotation must be made at the time
the equipment is put into service. If improper rotation is
corrected at this time there will be no negative impact on the
durability of the compressor. However, reverse operation for
over one hour may have a negative impact on the bearing
due to oil pump out.
NOTE: If compressor is allowed to run in reverse
rotation for several minutes the compressor’s
internal protector will trip.
All three phase ZR*3 compressors are wired identically
internally. As a result, once the correct phasing is
determined for a specific system or installation, connecting
properly phased power leads to the same Fusite terminals
should maintain proper rotation direction.
The direction of rotation of the motor may be changed by
reversing any two line connections to the unit.
SEQUENCE OF OPERATION
COOLING – Circuit R-Y makes at thermostat pulling in
compressor contactor starting the compressor and outdoor
motor. The G (indoor motor) circuit is automatically
completed on any call for cooling operation, or can be
energized by manual fan switch on subbase for constant air
circulation.
HEATING – A 24V solenoid coil on reversing valve
controls heating cycle operation. Two thermostat options,
one allowing “AUTO” changeover from cycle to cycle and
the other constantly energizing solenoid coil during heating
season and thus eliminating pressure equalization noise
except during defrost, are to be used. On “AUTO” option, a
circuit is completed from R-W1 and R-Y on each heating
“On” cycle energizing reversing valve solenoid and pulling
in compressor contactor starting compressor and outdoor
motor. R-G also make starting indoor blower motor. Heat
pump heating cycle now in operation. The second energizes

Manual 2100-344
Page 13
FIGURE 11
HEAT PUMP CONTROL BOARD
MIS-1191

Manual 2100-344
Page 14
FAN BLADE SETTINGS
Shown in Figure 12 are the correct fan blade setting
dimensions for proper air delivery across the outdoor coil.
Any service work requiring removal or adjustment in the fan
and/or motor area will require that the dimensions in
Figure 12 be checked and blade adjusted in or out on the
motor shaft accordingly.
SOLID STATE HEAT PUMP CONTROL
TROUBLESHOOTING PROCEDURE
1. Turn on AC power supply to indoor and outdoor units.
2. Turn thermostat blower switch to fan on. The indoor
blower should start. (If it doesn’t, troubleshoot indoor
unit and correct problem.)
3. Turn thermostat blower switch to Auto position. Indoor
blower should stop.
4. Set system switch to heat or cool. Adjust thermostat to
call for heat or cool. The indoor blower, compressor,
and outdoor fan should start.
NOTE: If there is no power to 24 volt transformer, the
compressor and outdoor fan motor will not start
for 5 minutes. This is because of the compressor
short cycle protection.
TABLE 10
Theabove suctionline temperatures arebased upon80°F
drybulb/67°F wet bulb(50% RH) temperatureand rated
airflowacross theevaporator duringcooling cycle.
ledoM detaR wolfriA
FeergeD59 DO erutarepmeT FeergeD28 DO erutarepmeT
4221HP 0321HP 6321HP 008 0001 0011 65-65 65-65 25-05 26-16 06-85 45-25
SERVICE AND TROUBLESHOOTING
SERVICE HINTS
1. Caution homeowner to maintain clean air filters at all
times. Also, not to needlessly close off supply and
return air registers. This reduces air flow through the
system which shortens equipment service life as well as
increasing operating costs.
2. Switching to heating cycle at 75° F or higher outside
temperature may cause a nuisance trip of the manual
reset high pressure switch.
3. The heat pump wall thermostats perform multiple
functions. Be sure that all function switches are
correctly set for the desired operating mode before
trying to diagnose any reported service problems.
4. Check all power fuses or circuit breakers to be sure that
they are the correct rating.
5. Periodic cleaning of the outdoor coil to permit full and
unrestricted airflow circulation is essential.
PRESSURE SERVICE PORTS
High and low pressure service ports are installed on all units
so that the system operating pressures can be observed.
Pressure tables can be found in Tables 11 and 12 in this
manual covering all models on both cooling and heating
cycles. It is imperative to match the correct pressure table to
the unit by model number.
REFRIGERANT CHARGE
The correct system R-22 charge is shown on the unit rating
plate. Optimum unit performance will occur with a
refrigerant charge resulting in a suction line temperature
(6” from compressor) as shown in Table 10.
FIGURE 12
FAN BLADE SETTING DIMENSIONS
MIS-1190
ledoMAnoisnemiD
4221HP 0321HP 6321HP "00.1 "57. "57.

Manual 2100-344
Page 15
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TROUBLE SHOOTING GUIDE

Manual 2100-344
Page 16
CHECKING TEMPERATURE SENSOR
CHECK OUT
1. Disconnect temperature sensor from board and from
outdoorcoil.
2. Use an ohmmeter and measure the resistance of the
sensor. Also use ohmmeter to check for short or open.
3. Check resistance reading to chart of resistance; use
sensor ambient temperature. (Tolerance of part is
± 10%.)
4. If sensor resistance reads very low, then sensor is
shorted and will not allow proper operation of the heat
pump control.
5. If sensor is out of tolerance, shorted, open, or reads very
low ohms then it should be replaced.
0.52-1786910.51046350.55434710.591356
0.42-9900910.61150250.65489610.693836
0.32-5853810.71415050.75745610.799326
0.22-8137710.81820940.85221610.898906
0.12-9821710.91095740.95017510.991695
0.02-7845610.02002640.06013510.0017285
0.91-4099510.12558440.16129410.1017965
0.81-9254510.22455340.26445410.2010755
0.71-5539410.32592240.36771410.3016445
0.61-4734410.42770140.46028310.4016235
0.51-6759310.52898930.56474310.5018025
0.41-6594310.62757830.66731310.5014905
0.31-6050310.72256730.76018210.7012894
0.21-9126210.82385630.86294210.8013784
0.11-9802210.92845530.96381210.9017674
0.01-8018110.03545430.07388110.0113664
0.9-2724110.13475330.17195110.1112654
0.8-5750110.23436230.27703110.2114644
0.7-0107010.33327130.37130110.3117634
0.6-4753010.43048030.47267010.4114724
0.5-0620010.53689920.57105010.5112814
0.4-460790.63751920.67742010.6113904
0.3-189390.73553820.77000010.7116004
0.2-800190.83775720.8706790.8111293
0.1-931880.93328620.9762590.9118383
0.0173580.04290620.0899290.0217573
0.1996280.14383520.1877090.1218763
0.2121080.24696420.2826880.2211063
0.3236770.34030420.3835680.3216253
0.4032570.44483320.4894480.4212543
0.5019270.54857220.580528
0.6076070.64051220.687508
0.7705860.74165120.789687
0.8814660.84989020.886867
0.9993460.94534020.987057
0.01944260.05698910.094337
0.11565060.15473910.195617
0.21547850.25768810.290007
0.31589650.35573810.390486
0.41482550.45898710.493866
FR FR FR FR
TEMPERATURE F vs RESISTANCE R OF TEMPERATURE SENSOR

Manual 2100-344
Page 17
SUCTION AND DISCHARGE TUBE
BRAZING
Compliant Scroll compressors have copper plated steel
suction and discharge tubes. These tubes are far more
rugged and less prone to leaks than copper tubes used on
other compressors. Due to different thermal properties of
steel and copper, brazing procedures may have to be
changed from those commonly used.
•To disconnect: heat joint Areas 2 and 3 slowly and
uniformly until braze material softens and the tube can
be pulled out of suction fitting. (See Figure 10.)
•Toconnect:
– Recommended brazing materials: silfos with
minimum 5% silver or silver braze material with
flux.
– Reinsert tube into fitting.
– Heat tube uniformly in Area 1 moving slowly to
Area 2. When joint reaches brazing temperature,
apply brazing material. (See Figure 10.)
– Heat joint uniformly around the circumference to
flow braze material completely around the joint.
– Slowly move torch into Area 3 to draw braze
material into joint. (See Figure 10.)
–Do not overheat joint.
MIS-1179
FIGURE 13
BRAZING DIAGRAM

Manual 2100-344
Page 18
PRESSURE TABLES
TABLE 11
COOLING AirTemperatureEntering Outdoor Coil Degrees F
ledoM riAnruteR erutarepmeTerusserP5708580959001501011511
4221HP
BD.ged57 BW.ged26 ediSwoL ediShgiH 37191 57502 67912 87432 97152 08762 18582 28303 38323
BD.ged08 BW.ged76 ediSwoL ediShgiH 87691 08012 18522 38042 48752 88472 78292 88113 98133
BD.ged58 BW.ged27 ediSwoL ediShgiH 18302 38712 48332 68842 78662 98482 09203 19223 29343
0321HP
BD.ged57 BW.ged26 ediSwoL ediShgiH 37802 57222 67732 87452 97072 97882 18703 28623 48643
BD.ged08 BW.ged76 ediSwoL ediShgiH 87312 08822 18342 38062 48772 58592 78513 88433 09553
BD.ged58 BW.ged27 ediSwoL ediShgiH 18022 38632 48252 68962 78782 88503 09623 19643 39763
6321HP
BD.ged57 BW.ged26 ediSwoL ediShgiH 27112 47522 57242 77852 87672 97492 08413 18333 28553
BD.ged08 BW.ged76 ediSwoL ediShgiH 77612 97132 08842 28562 38382 48203 68223 78243 88463
BD.ged58 BW.ged27 ediSwoL ediShgiH 08422 28932 38752 58472 68392 78313 98333 09453 19773
Low side pressure ± 2 PSIG
High side pressure ± 5 PSIG
Tables arebased uponrated CFM (airflowacross theevaporatorcoil andshould be foundunder sectiontitled “RefrigerantCharge”elsewhere
inmanual. If there isany doubtasto correctoperating charge beingin the system,the charge shouldbe removed, systemevacuated, and
rechargedto serialplate instructions.
TABLE 12
HEATING AirTemperature Entering Outdoor Coil DegreesF
ledoM nruteR pmeTriA . erusserP
05 015171025203530454740555
4221HPged07 ediSwoL ediShgiH 22471 42281 72091 03891 13102 33502 73312 14122 54922 05732 65542 85842 26352 86162
0321HPged07 ediSwoL ediShgiH 12761 32071 52471 82871 92971 13281 43781 83291 34791 84302 35012 55312 95712 56422
6321HPged07 ediSwoL ediShgiH 42491 52591 62791 82102 82202 03502 33112 73812 24622 74532 35642 65052 06752 86072