Comfort PRL-series User manual

92-20522-63-02
SUP RS D S 92-20522-63-01
TWO-STAGE HEAT PUMP OUTDOOR UN TS
(-)PRL-JEC 16 SEER EQU PPED W TH THE COMFORT CONTROL
2
SYSTEM™
NSTALLAT ON NSTRUCT ONS
RECOGNIZE THIS SYMBOL AS AN INDICATION OF IMPORTANT SAFETY INFORMATION!
!
DO NOT DESTROY THIS MANUAL
PLEASE READ CAREFULLY AND KEEP IN A SAFE PLACE FOR FUTURE REFERENCE BY A SERVICEMAN
THESE INSTRUCTIONS ARE INTENDED AS AN AID TO
QUALIFIED, LICENSED SERVICE PERSONNEL FOR PROPER
INSTALLATION, ADJUSTMENT AND OPERATION OF THIS UNIT.
READ THESE INSTRUCTIONS THOROUGHLY BEFORE
ATTEMPTING INSTALLATION OR OPERATION. FAILURE TO FOL-
LOW THESE INSTRUCTIONS MAY RESULT IN IMPROPER
INSTALLATION, ADJUSTMENT, SERVICE OR MAINTENANCE
POSSIBLY RESULTING IN FIRE, ELECTRICAL SHOCK,
PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
WARNING
!
[ ] ND CATES METR C CONVERS ONS

TABLE OF CONTENTS
1.0 SAFETY NFORMATON.........................................3-4
2.0 GENERAL NFORMATON.........................................5
2.1 CheckingProductReceived ...................................5
2.2 Application.................................................5
2.3 Dimensions ................................................6
2.4 lectricalandPhysicalData ...................................7
2.5 ProperInstallation...........................................7
3.0 LOCATNGUNT.................................................7
3.1 Corrosive nvironment .......................................7
3.2 HeatPumpLocation .........................................8
3.3 OperationalIssues...........................................8
3.4 For Units With Space Limitations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.5 CustomerSatisfactionIssues ..................................8
3.6 UnitMounting...............................................8
3.7 Factory-Preferred Tie-Down Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.0 REFRGERANTCONNECTONS....................................9
4.1 Tools Required for Installing & Servicing R-410A Models . . . . . . . . . . . . . 9
4.2 SpecificationofR-410A......................................10
4.3 Quick Reference Guide for R-410A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.0 REPLACEMENTUNTS ..........................................11
6.0 NDOORCOL..................................................11
6.1 Location..................................................11
7.0 NTERCONNECTNGTUBNG.....................................12
7.1 Vapor&LiquidLines........................................12
7.2 MaximumLengthofLines....................................12
7.3 Outdoor Unit Installed Above or Below Indoor Coil . . . . . . . . . . . . . . . . . 13
7.4 TubingInstallation..........................................13
7.5 TubingConnections.........................................14
7.6 LeakTesting ..............................................15
8.0 DEMANDDEFROSTCONTROL ...................................15
8.1 DefrostInitiation............................................15
8.2 DefrostTermination.........................................16
8.3 TemperatureSensors .......................................16
8.4 DefrostTestMode..........................................16
8.5 Trouble Shooting Demand Defrost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
9.0 COMPRESSOR CRANKCASE HEAT (CCH) . . . . . . . . . . . . . . . . . . . . . . . . . . 16
10.0 HARDSTARTCOMPONENTS.....................................16
11.0 H GH & LOW PRESSURE CONTROLS (HPC AND LPC) . . . . . . . . . . . . . . . . 17
11.1 vacuationProcedure.......................................17
12.0 CONDENS NG UN TS EQU PPED W TH COMFORT CONTROL2
SYSTEM™.....................................................18
12.1 ControlDescription .........................................18
12.2 Comfort Contro 2ControlWiring ...............................20
12.3 Comfort Contro 2ICCControlOperation.........................20
12.4 Active Compressor Protection Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
12.5 TestandFaultRecallModes..................................24
12.6 ICCDiagnosticCodes ....................................26-29
12.7 Conventional 24VAC Thermostat Control Wiring . . . . . . . . . . . . . . . . . . 29
12.8 Typical Thermostat Wiring Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
12.9 ICC Control Operation with Conventional Thermostat Wiring . . . . . . . . . 31
12.10 Active Compressor Protection Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
12.11 TestandFaultRecallModes..................................35
13.0 ELECTRCALWRNG ...........................................37
13.1 PowerWiring..............................................37
13.2 Grounding ................................................37
13.3 ControlWiring .............................................37
14.0 STARTUP&PERFORMANCE ....................................38
15.0 CHECKNGARFLOW ...........................................38
16.0 CHECK NG REFR GERANT CHARGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
16.1 Charging Units with R-410A Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . 39
16.2 ChargingByLiquidPressure..................................39
16.3 ChargingByWeight.........................................39
16.4 FinalLeakTesting..........................................40
17.0 ACCESSORES.................................................40
17.1 DualFuelKitModel.........................................40
17.2 Remote Outdoor Temperature Model . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
18.0 TROUBLESHOOTNG............................................40
18.1 Serial Communicating System Initial Startup. . . . . . . . . . . . . . . . . . . . . . 40
18.2 Replacement of Comfort Contro 2System™ Control Board . . . . . . . . . . 41
18.3 lectricalChecksFlowChart..................................42
18.4 Cooling Mechanical Checks Flow Chart . . . . . . . . . . . . . . . . . . . . . . . . . 43
18.5 Defrost Mechanical Checks Flow Chart. . . . . . . . . . . . . . . . . . . . . . . . . . 44
18.6 General Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
18.7 ServiceAnalyzerCharts...................................46-50
18.8 SubcoolingCalculation ......................................51
19.0 WRNGDAGRAMS ..........................................52-53
2

1.0 SAFETY INFORMATION
!WARNING
THESE NSTRUCT ONS ARE NTENDED AS AN A D TO QUAL F ED, L CENSED
SERV CE PERSONNEL FOR PROPER NSTALLAT ON, ADJUSTMENT AND
OPERAT ON OF TH S UN T. READ THESE NSTRUCT ONS THOROUGHLY
BEFORE ATTEMPT NG NSTALLAT ON OR OPERAT ON. FA LURE TO FOL-
LOW THESE NSTRUCT ONS MAY RESULT N MPROPER NSTALLAT ON,
ADJUSTMENT, SERV CE OR MA NTENANCE POSS BLY RESULT NG N F RE,
ELECTR CAL SHOCK, PROPERTY DAMAGE, PERSONAL NJURY OR DEATH.
!WARNING
THE MANUFACTURER’S WARRANTY DOES NOT COVER ANY DAMAGE OR
DEFECT TO THE A R COND T ONER CAUSED BY THE ATTACHMENT OR USE
OF ANY COMPONENTS, ACCESSOR ES OR DEV CES (OTHER THAN THOSE
AUTHOR ZED BY THE MANUFACTURER) NTO, ONTO OR N CONJUNCT ON
W TH THE A R COND T ONER. YOU SHOULD BE AWARE THAT THE USE OF
UNAUTHOR ZED COMPONENTS, ACCESSOR ES OR DEV CES MAY
ADVERSELY AFFECT THE OPERAT ON OF THE A R COND T ONER AND MAY
ALSO ENDANGER L FE AND PROPERTY. THE MANUFACTURER D SCLA MS
ANY RESPONS B L TY FOR SUCH LOSS OR NJURY RESULT NG FROM THE
USE OF SUCH UNAUTHOR ZED COMPONENTS, ACCESSOR ES OR DEV CES.
!WARNING
D SCONNECT ALL POWER TO UN T BEFORE START NG MA NTENANCE.
FA LURE TO DO SO CAN CAUSE ELECTR CAL SHOCK RESULT NG N
SEVERE PERSONAL NJURY OR DEATH.
!WARNING
DO NOT USE OXYGEN TO PURGE L NES OR PRESSUR ZE SYSTEM FOR
LEAK TEST. OXYGEN REACTS V OLENTLY W TH O L, WH CH CAN
CAUSE AN EXPLOS ON RESULT NG N SEVERE PERSONAL NJURY OR
DEATH.
!WARNING
THE UN T MUST BE PERMANENTLY GROUNDED. FA LURE TO DO SO
CAN CAUSE ELECTR CAL SHOCK RESULT NG N SEVERE PERSONAL
NJURY OR DEATH.
!WARNING
TURN OFF ELECTR C POWER AT THE FUSE BOX OR SERV CE PANEL
BEFORE MAK NG ANY ELECTR CAL CONNECT ONS.
ALSO, THE GROUND CONNECT ON MUST BE COMPLETED BEFORE
MAK NG L NE VOLTAGE CONNECT ONS. FA LURE TO DO SO CAN
RESULT N ELECTR CAL SHOCK, SEVERE PERSONAL NJURY OR
DEATH.
3

4
!CAUTION
UN T MAY START SUDDENLY AND W THOUT WARN NG
Solid red light indicates a thermostat call for unit operation is present at
the CC control. CC control will attempt to start unit after short cycle timer
expires or when in Active Protection mode will attempt to restart unit prior
to Lockout mode.
!CAUTION
UN T MAY START SUDDENLY AND W THOUT WARN NG
Solid red light indicates a thermostat call for unit operation is present at the
CC. CC will attempt to start unit after short cycle timer expires or when in
Active Protection mode will attempt to restart unit prior to Lockout mode.
!CAUTION
THE TOP OF THE SCROLL COMPRESSOR SHELL S HOT. TOUCH NG THE
COMPRESSOR TOP MAY RESULT N SER OUS PERSONAL NJURY.
!CAUTION
R-410A PRESSURES ARE APPROX MATELY 60% H GHER THAN R-22
PRESSURES. USE APPROPR ATE CARE WHEN US NG TH S REFR GER-
ANT. FA LURE TO EXERC SE CARE MAY RESULT N EQU PMENT DAM-
AGE, OR PERSONAL NJURY.
!CAUTION
THE COMPRESSOR HAS AN NTERNAL OVERLOAD PROTECTOR. UNDER
SOME COND T ONS, T CAN TAKE UP TO 2 HOURS FOR TH S OVERLOAD
TO RESET. MAKE SURE OVERLOAD HAS HAD T ME TO RESET BEFORE
CONDEMN NG THE COMPRESSOR.
!CAUTION
Only use evaporators approved for use on R-410A systems. Use of existing
R-22 evaporators can introduce mineral oil to the R-410A refrigerant form-
ing two different liquids and decreasing oil return to the compressor. This
can result in compressor failure.
!CAUTION
When coil is installed over a finished ceiling and/or living area, it is
recommended that a secondary sheet metal condensate pan be
constructed and installed under entire unit. Failure to do so can result
in property damage.
!
CAUTION
R-410A systems operate at hi her pressures than R-22 systems. Do not use
R-22 service equipment or components on R-410A equipment.

5
2.0 GENERAL INFORMATION
The (-)PRL-series of heat pump are designed to operate using the Comfort Contro 2
System™ or traditional 24VAC controls. These units are equipped with the Comfort
Contro 2System™. To take full advantage of the Comfort Contro 2System™, the
preferred method of installation is using the Comfort Contro 2. Your installation must
have these components to use the Comfort Contro 2System™ :
• (-)PRL heat pump with the Comfort Contro 2System™
• Air handler or furnace equipped with the Comfort Contro 2System™
•Comfort Contro 2thermostat
If your installation does not meet the above requirements, you must use traditional
24VAC controls.
This installation instruction manual contains complete instructions for installation
and setup with using the Comfort Contro 2or conventional 24VAC controls. Please
refer to the ngineering Specification Sheets for complete performance data, ther-
mostat, and accessory listings.
The information contained in this manual has been prepared to assist in the proper
installation, operation and maintenance of the air conditioning system. Improper
installation, or installation not made in accordance with these instructions, can
result in unsatisfactory operation and/or dangerous conditions, and can cause the
related warranty not to apply.
Read this manual and any instructions packaged with separate equipment required
to make up the system prior to installation. Retain this manual for future reference.
To achieve optimum efficiency and capacity, the indoor cooling coils listed in the
condensing unit specification sheet should be used.
2.1 Checking Product Received
Upon receiving unit, inspect it for any shipping damage. Claims for damage, either
apparent or concealed, should be filed immediately with the shipping company.
Check heat pump model number, electrical characteristics and accessories to
determine if they are correct. Check system components (evaporator coil, condens-
ing unit, evaporator blower, etc.) to make sure they are properly matched.
2.2 Application
Before specifying any heat pump equipment, a survey of the structure and a heat
loss and heat gain calculation must be made. A heat loss calculation involves iden-
tifying all surfaces and openings that lose heat to the surrounding air and quantify-
ing that heat loss. A cooling heat gain calculation makes similar measurements and
determines the amount of heat needed to be removed. A heat gain calculation also
calculates the extra heat load caused by sunlight and by humidity removal. These
factors must be considered before selecting a heat pump system to provide year
round comfort. The Air Conditioning Contractors of America (ACCA) J Manual
method of load calculation is one recognized procedure for determining the heating
and cooling load.
The cooling load calculation determines the heat pump size. There are two capaci-
ties that enable the equipment to provide comfort. The first is sensible capacity.
Sensible heat is the heat energy measured on the dry bulb thermometer.
The second form of heat is called latent or hidden heat. This is heat held in the
humidity in the air. Removing this heat does not affect a thermometer. However,
removing the heat held in the moisture in the air greatly increases comfort. A prop-
erly sized unit removes both forms of heat, producing a comfortable living space. An
oversized system cycles on and off too quickly and does not properly remove
humidity, producing an uncomfortable living space. Select the indoor and outdoor
equipment combination based on the manufacturer's engineering data.
After the proper equipment combination has been selected, satisfying both sensible
and latent requirements, the system must be properly installed. Only then can the
unit provide the comfort the manufacturer built into it.
There are several factors that installers must consider.
• Outdoor unit location • Indoor unit blower speed
• Proper equipment evacuation • Supply and return air duct design and sizing
• Refrigerant charge • System air balancing
• Indoor unit air flow • Diffuser and return air grille location and sizing
!WARNING
THE MANUFACTURER’S WAR-
RANTY DOES NOT COVER ANY
DAMAGE OR DEFECT TO THE
A R COND T ONER CAUSED BY
THE ATTACHMENT OR USE OF
ANY COMPONENTS. ACCES-
SOR ES OR DEV CES (OTHER
THAN THOSE AUTHOR ZED BY
THE MANUFACTURER) NTO,
ONTO OR N CONJUNCT ON
W TH THE A R COND T ONER.
YOU SHOULD BE AWARE THAT
THE USE OF UNAUTHOR ZED
COMPONENTS, ACCESSOR ES
OR DEV CES MAY ADVERSELY
AFFECT THE OPERAT ON
OF THE A R COND T ONER AND
MAY ALSO ENDANGER L FE
AND PROPERTY. THE MANUFAC-
TURER D SCLA MS ANY
RESPONS B L TY FOR SUCH
LOSS OR NJURY RESULT NG
FROM THE USE OF SUCH
UNAUTHOR ZED COMPONENTS,
ACCESSOR ES OR DEV CES.
MATCH ALL COMPONENTS:
• OUTDOOR UN T
• NDOOR CO L/METER NG DEV CE
• NDOOR A R HANDLER/FURNACE
• REFR GERANT L NES

6
024, 036, 048, 060HEAT PUMP MODEL (-)PRL
F GURE 1
D MENS ONS AND NSTALLAT ON CLEARANCES UN T MODEL NUMBER EXPLANAT ON
–036 J C(– ) P R L
C = QUIPP D WITH TH
C = COMFORT CONTROL2
C = SYSTEM™
L CTRICAL D SIGNATION
J- 208/230-1-60
COOLING CAPACITY
BTUH x 1000 (NOMINAL CAPACITY)
024 = 24,000 BTU/HR
036 = 36,000 BTU/HR
048 = 48,000 BTU/HR
060 = 60,000 BTU/HR
D SIGN S RI S
R-410A
16 S R
R MOT H AT PUMP
TRAD NAM
SERVICE
FITTINGS
LOW VOLTAGE
CONNECTION
7/8" [22 mm]
HIGH VOLTAGE
CONNECTION
111/32" [34 mm]
LIQUID LINE
CONNECTION
SERVICE ACCESS
TO ELECTRICAL &
VALVES ALLOW
24" [610 mm]
CLEARANCE
ONE SIDE
27/8" [73 mm] DIA.
ACCESSORY
KNOCKOUTS
VAPOR LINE
CONNECTION
HIGH PRESSURE
CONTROL
MANUAL RESET
(FIELD INSTALLED
ACCESSORY)
A-00003
D MENS ONAL DATA
ALLOW 24” [610 mm]
SERVICE ACCESS
CLEARANCE
AIR INLETS
LOUVERS)
ALLOW 6” [152 mm]
MIN. CLEARANCE
3 SIDES
ACCESS
PANEL
AIR DISCHARGE
ALLOW 60” [1524 mm] CLEARANCE
R QUIR D PUMP-UP
INSTALLATION
LOCATIONS
A-00002
BOTTOM VIEW SHOWING DEFROST CONDENSATE
DRAIN OPENINGS (\\\\\\
SHADED AREAS).
BASE PAN
33
44-3/4
31-1/2
HE GHT “H” ( NCHES)
LENGTH “L” ( NCHES)
W DTH“W” ( NCHES)
L
W
H
2.3 DIMENSIONS

7
TABLE 1
(-)PRL ELECTR CAL AND PHYS CAL DATA
ELECTR CAL PHYS CAL
Model
Number
(-)PRL-
Phase
Frequency (Hz)
Voltage (Volts)
Voltage
Operating
Range
(Volts)
Rated Load
Amperes
(RLA)
Locked Rotor
Amperes
(LRA)
Fan Motor
Full Load
Amperes
(FLA)
Minimum
Circuit
Ampacity
Amperes Minimum
Amperes
Maximum
Amperes
Face Area
Sq. Ft. [M2]
No.
Rows
Fins
Per
nch
CFM [L/s]
R-410A
Oz. [g] Net
Lbs. [kg]
Shipping
Lbs. [kg]
Fuse or HACR
Circuit Breaker Outdoor Coil Weight
024J C 1-60-208/230 197 - 253 10.3 / 10.3 52 0.5 14 / 14 20 / 20 20 / 20 15.8 [1.47] 1 22 152.4 [4320] 257 [116.6] 275 [124.7]
036J C 1-60-208/230 197 - 253 16.7 / 16.7 82 1.0 22 / 22 30 / 30 35 / 35 23.0 [2.14] 2 22 244.6 [6934] 293 [132.9] 311 [141.1]
048J C 1-60-208/230 197 - 253 21.2 / 21.2 96 1.0 28 / 28 35 / 35 45 / 45 23.0 [2.14] 2 22 256.3 [7265] 300 [136.1] 318 [144.2]
060J C 1-60-208/230 197 - 253 25.6 / 25.6 118 1.1 34 / 34 40 / 40 50 / 50 23.0 [2.14] 2 22 284.4 [8063] 316 [143.3] 335 [152.0]
Compressor
HS*2800 [1322]
LS*2300 [ 1086]
HS*3700 [1747]
LS*2800 [1322]
HS*3500 [1652]
LS*2800 [1322]
3800 [1794]
*HS = high speed
*LS = low speed
2.4 Electrical And Physical Data
2.5 Proper Installation
Proper sizing and installation of this equipment is critical to achieve optimal perfor-
mance. Use the information in this Installation Instruction Manual and reference the
applicable ngineering Specification Sheet when installing this product.
MPORTANT: This product has been designed and manufactured to meet N R-
GY STAR criteria for energy efficiency when matched with appropriate coil compo-
nents. However, proper refrigerant charge and proper airflow are critical to achieve
rated capacity and efficiency. Installation of this product should follow the manufac-
turer’s refrigerant charging and airflow instructions. Failure to confirm proper
charge and airflow may reduce energy efficiency and shorten equipment life.
3.0 LOCATING UNIT
3.1 Corrosive Environment
The metal parts of this unit may be subject to rust or deterioration if exposed to a
corrosive environment. This oxidation could shorten the equipment’s useful life.
Corrosive elements include, but are not limited to, salt spray, fog or mist in seacoast
areas, sulphur or chlorine from lawn watering systems, and various chemical conta-
minants from industries such as paper mills and petroleum refineries.
If the unit is to be installed in an area where contaminants are likely to be a prob-
lem, special attention should be given to the equipment location and exposure.
• Avoid having lawn sprinkler heads spray directly on the unit cabinet.
• In coastal areas, locate the unit on the side of the building away from the water-
front.
• Shielding provided by a fence or shrubs may give some protection, but cannot
violate minimum airflow and service access clearances.
• levating the unit off its slab or base enough to allow air circulation will help
avoid holding water against the basepan.
Regular maintenance will reduce the build-up of contaminants and help to protect
the unit’s finish.
• Frequent washing of the cabinet, fan blade and coil with fresh water will remove
most of the salt or other contaminants that build up on the unit.
• Regular cleaning and waxing of the cabinet with a good automobile polish will
provide some protection.
• A good liquid cleaner may be used several times a year to remove matter that
will not wash off with water.
!WARNING
D SCONNECT ALL POWER TO UN T BEFORE START NG
MA NTENANCE. FA LURE TO DO SO CAN CAUSE ELECTR CAL SHOCK
RESULT NG N SEVERE PERSONAL NJURY OR DEATH.

Several different types of protective coatings are offered in some areas. These
coatings may provide some benefit, but the effectiveness of such coating materials
cannot be verified by the equipment manufacturer.
3.2 Heat Pump Location
Consult local and national building codes and ordinances for special installation
requirements. Following location information will provide longer life and simplified
servicing of the outdoor heat pump.
NOTE: These units must be installed outdoors. No ductwork can be attached, or
other modifications made, to the discharge grille. Modifications will affect perfor-
mance or operation.
3.3 Operational Issues
•MPORTANT: Locate the unit in a manner that will not prevent, impair or com-
promise the performance of other equipment horizontally installed in proximity
to the unit. Maintain all required minimum distances to gas and electric meters,
dryer vents, exhaust and inlet openings. In the absence of National Codes, or
manufacturers’ recommendations, local code recommendations and require-
ments will take precedence.
• Refrigerant piping and wiring should be properly sized and kept as short as
possible to avoid capacity losses and increased operating costs.
• Locate the unit where water run off will not create a problem with the equip-
ment. Position the unit away from the drip edge of the roof whenever possible.
Units are weatherized, but can be affected by the following:
o Water pouring into the unit from the junction of rooflines, without protective
guttering. Large volumes of water entering the heat pump while in operation
can impact fan blade or motor life, and coil damage may occur to a heat
pump if moisture cannot drain from the unit under freezing conditions.
o Freezing moisture, or sleeting conditions, can cause the cabinet to ice-over
prematurely and prevent heat pump operation, requiring backup heat, which
generally results in less economical operation.
• Closely follow clearance recommendations on Page 6.
o 24” to the service panel access
o 60” above heat pump fan discharge (unit top) to prevent recirculation
o 6” to heat pump coil grille air inlets
3.4 For Units With Space Limitations
FOR CONDENSERS WITH SPACE LIMITATIONS
In the event that a space limitation exists, we will permit the following clearances:
Single Unit Applications: Clearances below 6 inches will reduce unit capacity and
efficiency. Do not reduce the 60-inch discharge, or the 24-inch service clearances.
Multiple Unit Applications: When multiple condenser grille sides are aligned, a 6-
inch per unit clearance is recommended, for a total of 12” between two units. Two
combined clearances below 12 inches will reduce capacity and efficiency. Do not
reduce the 60-inch discharge, or 24-inch service, clearances.
3.5 Customer Satisfaction Issues
• The heat pump should be located away from the living, sleeping and recre-
ational spaces of the owner and those spaces on adjoining property.
• To prevent noise transmission, the mounting pad for the outdoor unit should
not be connected to the structure, and should be located sufficient distance
above grade to prevent ground water from entering the unit.
3.6 Unit Mounting
If elevating the heat pump, either on a flat roof or on a slab, observe the
following guidelines.
• The base pan provided elevates the heat pump 3/4” above the base pad.
• If elevating a unit on a flat roof, use 4” x 4” (or equivalent) stringers positioned
to distribute unit weight evenly and prevent noise and vibration (see Figure 2).
NOTE: Do not block drain openings shown in Figure 1.
• If unit must be elevated because of anticipated snow fall, secure unit and ele-
vating stand such that unit and/or stand will not tip over or fall off. Keep in mind
that someone may try to climb on unit.
8

3.7 Factory-Preferred Tie-Down Method
INSTRUCTIONS
MPORTANT: These instructions are intended as a guide to securing equipment for
wind-load ratings of “120 MPH sustained wind load” and “3-second, 150 MPH gust.”
While this procedure is not mandatory, the Manufacturer does recommend that
equipment be properly secured in areas where high wind damage may occur.
ST P 1: Before installing, clear pad of any dirt or debris.
MPORTANT: The pad must be constructed of industry-approved materials,
and must be thick enough to accommodate the concrete fastener.
ST P 2: Center base pan on pad, ensuring it is level.
ST P 3: Using basepad as a guide, mark spots on concrete where 4 holes will be
drilled (see Figure 3).
ST P 4: Drill four pilot holes in pad, ensuring that the hole is at least 1/4” deeper
than the concrete screw being used.
ST P 5: Center basepan over pre-drilled holes and insert concrete screws.
ST P 6: Tighten concrete screws.
NOTE: Do not over-tighten the concrete screws. Doing so can weaken the
integrity of the concrete screw and cause it to break.
ST P 7: Finish unit assembly per unit’s installation instructions.
4.0 REFRIGERANT CONNECTIONS
All units are factory charged with Refrigerant 410A. All models are supplied with
service valves. Keep tube ends sealed until connection is to be made to prevent
system contamination.
4.1 Tools Required For Installing & Servicing R-410A Models
Manifold Sets:
-Up to 800 PS G High side
-Up to 250 PS G Low Side
-550 PS G Low Side Retard
Manifold Hoses:
-Service Pressure Rating of 800 PS G
F GURE 2
RECOMMENDED ELEVATED NSTALLAT ON
9

Recovery Cylinders:
-400 PS G Pressure Rating
-Dept. of Transportation 4BA400 or BW400
4.2 Specifications of R-410A:
Application: R-410A is not a drop-in replacement for R-22; equipment designs
must accommodate its higher pressures. It cannot be retrofitted into R-22 heat
pumps.
Physical Properties: R-410A has an atmospheric boiling point of -62.9°F and its
saturation pressure at 77°F is 224.5 psig.
Composition: R-410A is an azeotropic mixture of 50% by weight difluoromethane
(HFC-32) and 50% by weight pentafluoroethane (HFC-125).
Pressure: The pressure of R-410A is approximately 60% (1.6 times) greater
than R-22. Recovery and recycle equipment, pumps, hoses and the like need to
have design pressure ratings appropriate for R-410A. Manifo d sets need to range
up to 800 psig high-side and 250 psig ow-side with a 550 psig ow-side retard.
Hoses need to have a service pressure rating of 800 psig. Recovery cy inders need
to have a 400 psig service pressure rating. DOT 4BA400 or DOT BW400.
F GURE 3
SCREW LOCAT ONS
TABLE 2
D MENS ONS
MODEL NUMBER LWAB CD
(-)PRL-024/036/048/060 41.5 29.813 15 38 3.5 26.5
!
CAUTION
R-410A systems operate at higher pressures than R-22 systems. Do not use
R-22 service equipment or components on R-410A equipment.
10