Goodman CONDENSING AC UNIT User manual

Important Safety Instructions
The following symbols and labels are used throughout this
manualtoindicateimmediateorpotentialsafetyhazards. Itis
the owner’s and installer’s responsibility to read and comply
withallsafetyinformationand instructionsaccompanyingthese
symbols. Failuretoheedsafetyinformationincreasestherisk
ofpersonalinjury,propertydamage,and/orproductdamage.
HIGH VOLTAGE!
Disconnect ALL power before servicing.
Multiple power sources may be present.
Failure to do so may cause property damage,
personal injury or death.
WARNING
ONLY individuals meeting the requirements of an
“Entry Level Technician”, at a minimum, as specified
by theAir Conditioning, Heating and Refrigeration
Institute (AHRI) may use this information. Attempting
to install or repair this unit without such background
may result in product damage, personal injury,
or death.
Shipping Inspection
Always keep the unit upright; laying the unit on its side or top
maycauseequipment damage. Shippingdamage,andsubse-
quent investigation is the responsibility of the carrier. Verify
the model number, specifications, electrical characteristics,
and accessories are correct prior to installation. The distribu-
toror manufacturerwillnotacceptclaimsfromdealersfortrans-
portationdamageor installation of incorrectly shipped units.
CONDENSINGACUNIT
3-PHASE 7.5 & 10 TON AIR CONDITIONER
INSTALLATION & SERVICE REFERENCE
© 2010 Goodman Manufacturing Company, L.P.
5151 San Felipe, Suite 500, Houston, TX 77056
www.goodmanmfg.com -or- www.amana-hac.com
P/N: IO-404 Date: November 2010
Codes & Regulations
This product is designed and manufactured to comply with
nationalcodes.Installationinaccordancewith suchcodesand/
orprevailinglocalcodes/regulationsistheresponsibilityof the
installer. Themanufacturerassumesnoresponsibilityforequip-
mentinstalled in violation of anycodesorregulations.
TheUnited States EnvironmentalProtection Agency (EPA)
has issued various regulations regarding the introduc-
tion and disposal of refrigerants. Failure to follow these
regulations may harm the environment and can lead to
the imposition of substantial fines. Should you have any
questions please contact the local office of the EPA.
If replacing a condensing unit or air handler, the system must
bemanufacturerapproved and Air Conditioning, Heating and
RefrigerationInstitute(AHRI)matched.
Refertothe unit Specification Sheet for the recommendedin-
door model selection. NOTE: This unit must be used with a
purchased single stage room thermostat with 24 VAC control
circuitry.
Do not operate the unit in a structure that is not complete
(eitheraspartofnewconstruction or renovation). Such opera-
tionwillvoidthe warranty.
Installation Clearances
This unit is designed for outdoor installations only. Special
considerationmustbegiventolocationofthecondensingunit(s)
in regard to structures, obstructions, other units, and any/all
other factors that may interfere with air circulation. Where
possible,thetopoftheunit shouldbecompletelyunobstructed;
however, if vertical conditions require placement beneath an
obstruction there should be a minimum of 60 inches be-
tweenthetop of the unit andtheobstruction(s). The speci-
fied dimensions meet requirements for air circulation only.
Consult all appropriate regulatory codes prior to determining
finalclearances.
NOTICE
THIS UNIT IS SHIPPED WITH A NITROGEN/HELIUM HOLDING CHARGE ONLY. UNIT
MUST BE EVACUATED AND CHARGED PER INSTALLATION INSTRUCTIONS WITH
REFRIGERANT LISTED ON SERIAL RATING PLATE.
UNITS SHIPPED WITH A HOLDING CHARGE ARE INTENDED FOR COMPONENT
REPLACEMENT ONLY ON EXISTING SYSTEMS, AND NOT INTENDED FOR USE IN
NEW SYSTEMS OR NEWLY CONSTRUCTED HOMES.
NOTICE
NOTICE
UNITS MUST ONLY BE USED AS REPLACEMENT COMPONENTS FOR PRE-2010
INSTALLED SYSTEMS.

2
Use field-supplied spreader bars when lifting the unit to mini-
mize the possibility of lifting cable/straps damage. To protect
the cabinet louvers, use protective material such as plywood
behind the cable/straps. Arrange the straps to form a central
suspension point. NOTE: When raising and setting the unit,
observeallsafetyrules. Remove shipping skid and all protec-
tion and lifting material after the unit is in place.
Safe Refrigerant Handling
While these items will not cover every conceivable situation,
theyshould serve as a useful guide.
Refrigerants are heavier than air. They can "push out"
the oxygen in your lungs or in any enclosed space.To
avoid possible difficulty in breathing or death:
• Never purge refrigerant into an enclosed room or
space. By law, all refrigerants must be reclaimed.
• If an indoor leak is suspected, throughly ventilate the
area before beginningwork.
• Liquid refrigerant can be very cold. To avoid possible
frostbite or blindness, avoid contact and wear gloves
and goggles. If liquid refrigerant does contact your
skin or eyes, seek medical help immediately.
• Always follow EPA regulations. Never burn refrig-
erant, as poisonous gas will be produced.
WARNING
To avoid possible explosion:
Never apply flame or steam to a refrigerant cylinder.
If you must heat a cylinder for faster charging,
partially immerse it in warm water.
Never fill a cylinder more than 80% full of liquid re-
frigerant.
• Never add anything other than R-22 to an R-22 cy-
linder. The service
equipment used must be listed or certified for the
type of refrigerant used.
• Store cylinders in a cool, dry place. Never use a cy-
linder as a platform or a roller.
•
•
Anotherimportantconsiderationinselecting a location for the
unit(s) is the angle to obstructions. Either side adjacent the
valves can be placed toward the structure provided the side
awayfromthe structuremaintainsminimumservice clearance.
Cornerinstallationsarestronglydiscouraged.
12"
12"
60"
24"
Thisunitcanbelocatedat ground floor level or on flatroofs.At
groundfloorlevel,theunitmustbeonasolid,levelfoundation
that will not shift or settle. To reduce the possibility of sound
transmission,thefoundationslabshouldnot be in contact with
orbean integralpartofthebuilding foundation.Thefoundation
slabshouldbea minimum of 6” wider than the unit inall direc-
tions.Ensurethe foundation is sufficient to support theunit. A
concrete slab raised above ground level provides a suitable
base.
The selected site should be no greater than 50’ below or 70’
abovethe evaporator section. For optimum performance,the
minimumlengthinterconnectingtubingispreferred.Whenpos-
sible minimize the amount of bends and turns.
Rooftop Installations
If it is necessary to install this unit on a roof structure, ensure
theroofstructure can support the weight and thatproper con-
siderationisgiventotheweather-tightintegrityoftheroof.Since
theunitcan vibrate duringoperation,soundvibrationtransmis-
sion should be considered when installing the unit. Vibration
absorbing pads or springs can be installed between the con-
densingunit legs or frame and theroof mountingassembly to
reducenoisevibration.
Rigging
To avoid possible injury or death, all panels must be
in position and secured before lifting this equipment

3
To avoid possible explosion, use only returnable (not
disposable) service cylinders when removing refrig-
erant from a system.
• Ensure the cylinder is free of damage which could
lead to a leak or explosion.
• Ensure the hydrostatic test date does not exceed
5 years.
• Ensure the pressure rating meets or exceeds 400
lbs.
When in doubt, do not use cylinder.
WARNING
Refrigerant Lines
NOTE: For improved refrigerant management, equip the
evaporator coil with a field-supplied thermal expansion valve
(TXV)andtheliquidlinewithafield-suppliedliquidlinesolenoid.
Ensure the solenoid is installed as close as possible to the
evaporator coil to prevent refrigeration migration in the
compressor“OFF” cycle.
Useonly refrigerantgrade(dehydrated andsealed)copper tub-
ingtoconnectthecondensingunitwiththeindoorevaporator.
Aftercuttingthetubing, install plugs to keep refrigerant tubing
clean and dry prior to and during installation. Tubing should
alwaysbecutsquarekeepingendsround and free from burrs.
Cleanthetubingtopreventcontamination.
DoNOTletrefrigerantlinescome in direct contact with plumb-
ing,ductwork, floor joists, wallstuds,floors,and walls. When
runningrefrigerantlines throughafoundationorwall, openings
should allow for sound and vibration absorbing material to be
placed or installed between tubing and foundation. Any gap
betweenfoundationorwallandrefrigerantlinesshouldbefilled
withapliablesilicon-basedcaulk,RTVor a vibration damping
material. Avoid suspending refrigerant tubing from joists and
studs with rigid wire or straps that would come in contact with
thetubing.Useaninsulatedorsuspensiontypehanger.Keep
both lines separate and always insulate the suction line.
Suct Liq Suct Liq Suct Liq
7 1/2 1 1/8 5/8 1 3/8 5/8 1 3/8 5/8
10 1 3/8 5/8 1 5/8 5/8 1 5/8 5/8
Cond Unit
(Tons)
REFRIGERANT LINE LENGTH (ft)
0-24 25-49* 50-74**
Line Diameter (In. OD)
* Full rating line size
** Lines greater than 74 feet in length or vertical elevation
changes more than 50 feet refer to the Remote Cooling
Service Manual or contact your distributor for assistance.
Insulationisnecessary to prevent condensation from forming
and dropping from the suction line. Armflex (or satisfactory
equivalent) with 3/8” min. wall thickness is recommended. In
severeconditions(hot,highhumidityareas)1/2”insulationmay
be required. Insulation must be installed in a manner which
protectstubingfromdamageandcontamination.
Where possible, drain as much residual compressor oil from
existing systems, lines, and traps; pay close attention to low
areas where oil may collect. NOTE: If changing refrigerant
types, ensure the indoor coil and metering device is compat-
ible with the type of refrigerant being used; otherwise, the in-
door coil must be replaced. To facilitate oil return to the com-
pressor, a horizontal suction line should be pitched (1/2” per
10’towardthecondensing unit.
FilterDrier andSight Glass
Aliquidlinefilterdrier is factory installed. Field-install the sup-
plied sight glass/moisture indicator on the liquid line as close
aspracticaltotheservice valve.
Burying Refrigerant Lines
Ifburyingrefrigerant linescannotbe avoided,usethefollowing
checklist.
1. Insulate liquid and suction lines separately.
2. Enclose all underground portions of the refrigerant lines
inwaterproof material (conduitor pipe)sealingthe ends
wheretubingenters/exits the enclosure.
3. If the lines must pass under or through a concrete slab,
ensurelinesareadequatelyprotectedandsealed.

4
Refrigerant Line Connections
NOTICE
THIS UNIT IS SHIPPED WITH A NITROGEN/HELIUM
HOLDING CHARGE ONLY. UNIT MUST BE
EVACUATED AND CHARGED PER INSTALLATION
INSTRUCTIONS WITH REFRIGERANT LISTED ON
SERIAL RATING PLATE.
NOTE:Holdingchargemustberemovedbeforebrazing. Open
servicevalvesslowlytoremoveholdingcharge. Closevalves
beforebrazingtopreventcontaminantsfromenteringsystem.
IMPORTANT:To avoid overheating the service valve, TXV
valve, or filter drier while brazing, wrap the component
with a wet rag, or use a thermal heat trap compound as
recommended by the compound manufacturer. Use a
brazing alloy of 2% minimum silver content. Do not use
flux.
1. Theendsof the refrigerant lines must becut square,de-
burred,cleaned,andberoundandfreefromnicksordents.
Anyotherconditionincreasesthechanceofarefrigerant
leak.
2. “Sweep”therefrigerantline with nitrogenorinertgasdur-
ing brazing to prevent the formation of copper-oxide in-
sidetherefrigerantlines.
3. After brazing, quench the joints with water or a wet cloth
topreventoverheatingoftheservice valve.
4. Ensure the filter drier paint finish is intact after brazing. If
thepaintofthesteelfilterdrierhasbeenburnedorchipped,
repaintortreatwith a rustpreventative. Thisisespecially
important on suction line filter driers which are continu-
ally wet when the unit is operating.
NOTE: Becarefulnottokinkordent refrigerant lines. Kinked
or dented lines will cause poor performance or compressor
damage.
Do NOT make final refrigerant line connection until plugs are
removedfromrefrigeranttubing.
NOTE: Before brazing, verify indoor piston size by checking
the piston kit chart packaged with indoor unit.
Leak Testing (Nitrogen or Nitrogen-Traced)
To avoid the risk of fire or explosion, never use
oxygen, high pressure air or flammable gases for leak
testing of a refrigeration system.
WARNING
To avoid possible explosion, the line from the
nitrogen cylinder must include a pressure regulator
and a pressure relief valve. The pressure relief valve
must be set to open at no more than 150 psig.
WARNING
Pressure test the system using dry nitrogen and soapy water
to locate leaks. If you wish to use a leak detector, charge the
system to 10 psi using the appropriate refrigerant then use
nitrogentofinish chargingthesystemtoworking pressurethen
apply the detector to suspect areas. If leaks are found, repair
them. After repair, repeat the pressure test. If no leaks exist,
proceedtosystemevacuation.
System Evacuation
Condensingunitliquid andsuctionvalvesare closedtocontain
the charge within the unit. The unit is shipped with the valve
stems closed and caps installed.
REFRIGERANT UNDER PRESSURE!
Failure to follow proper procedures may cause
property damage, personal injury or death.
WARNING
NOTICE
THIS UNIT IS SHIPPED WITH A NITROGEN/HELIUM
HOLDING CHARGE ONLY. UNIT MUST BE
EVACUATED AND CHARGED PER INSTALLATION
INSTRUCTIONS WITH REFRIGERANT LISTED ON
SERIAL RATING PLATE.
UNITS SHIPPED WITH A HOLDING CHARGE ARE
INTENDED FOR COMPONENT REPLACEMENT
ONLY ON EXISTING SYSTEMS, AND NOT
INTENDED FOR USE IN NEW SYSTEMS OR NEWLY
CONSTRUCTED HOMES.
NOTICE
NOTICE
UNITS MUST ONLY BE USED AS REPLACEMENT
COMPONENTS FOR PRE-2010 INSTALLED
SYSTEMS.
NOTE:Holdingcharge must be removedbeforebrazing.
1. Openservicevalvesbeforeattachingvacuumpump.
2. Connectthevacuum pump with 250 micron capability to
theservicevalves.
3. Evacuate the system to 250 microns or less using suc-
tion and liquid service valves. Using both valves is nec-
essary as some compressors create a mechanical seal
separating the sides of the system.
4. Closepumpvalveandhold vacuumfor10minutes. Typi-
cally pressure will rise during this period.

5
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
0 1 2 3 4 5 6 7 8 9 10
LEAK(S)
PRESENT
MINUTES
VACUUM IN MICRONS
CONDENSIBLES OR SMALL
LEAK PRESENT
NO LEAKS
NO CONDENSIBLES
•Ifthepressurerisesto1000micronsorlessandremains
steady the system is considered leak-free; proceed to
startup.
• If pressure rises above 1000 microns but holds steady
below 2000 microns, moisture and/or noncondensibles
may be present or the system may have a small leak.
Returntostep2:Ifthesameresultisencounteredcheck
forleaksaspreviouslyindicatedand repair as necessary
thenrepeatevacuation.
•If pressure rises above 2000 microns, a leak is present.
Checkforleaksaspreviouslyindicated andrepairasnec-
essarythenrepeatevacuation.
Refertothe RemoteCondensingUnitService Manualformore
detailedinstructionson systemevacuation,preliminarycharge
adjustment,andfinalcharge adjustment.
Electrical Connections
HIGH VOLTAGE!
Disconnect ALL power before servicing.
Multiple power sources may be present.
Failure to do so may cause property damage,
personal injury or death due to electric shock.
Wiring must conform with NEC or CEC and all
local codes. Undersized wires could cause
poor equipment performance, equipment damage
or fire.
WARNING
To avoid the risk of fire or equipment damage, use
copper conductors.
WARNING
NOTICE
Units with reciprocating compressors and non-bleed TXV’s
require a Hard Start Kit.
Thisunit is designed forthreephase operation. DO NOT OP-
ERATE ON A SINGLE PHASE POWER SUPPLY. Measure
the power supply to the unit. The supply voltage must be in
agreementwiththeunitratingplatepowerrequirements.
RATED
VOLTAGE MINIMUM SUPPLY VOLTAGE MAXIMUM SUPPLY VOLTAGE
208/230V 197 253
460V 414 506
The condensing unit rating plate lists pertinent electrical data
necessaryforproperelectrical service andovercurrentprotec-
tion. Wires should be sized to limit voltage drop to 2% (max.)
from the main breaker or fuse panel to the condensing unit.
Consult the NEC, CEC, and all local codes to determine the
correctwiregaugeand length. The wiresizemustbesufficient
to carry the Minimum Circuit Ampacity (MCA) listed on the
serialplate.
Thesupplyvoltage canbeunbalanced(phaseto phase) within
2%. The following formula can be used to determine the per-
centageofvoltageunbalanceforyourunit.
Percentage
Voltage
Unbalance
=
Max. Voltage Deviation Form
Average Voltage
Average Voltage
Example:
L1-L2 = 220V
L2-L3 = 216V
Average Voltage = (220 + 216 + 213)/3
=649/3
Maximum Deviation from Average = 220 - 216 = 4
% Voltage Unbalance = 100 x (4/216)
= 400/216
10 15 20 25 30 35 40 45
14 75 50 37 NR NR NR NR NR
12 118 79 59 47 NR NR NR NR
10 188 125 95 75 63 54 NR NR
8 301 201 150 120 100 86 75 68
6 471 314 235 188 157 134 118 110
*Based on NEC 1996
MAXIMUM ALLOWABLE LENGTH IN FEET
TO LIMIT VOLTAGE DROP TO 2%
Minimum Circuit Ampacity (MCA)
Wire
Size
(AWG)

6
Example:
A
7 ½ Ton unit is to be installed. The distance from the
building to the unit is 75’. Calculate the minimum wire size
assuming no more than 2% voltage drop.
MCA for 7 Ton 230V unit = 43.3 (from S&R plate).
Applying previous table wire sizes less than #8 AWG
cannot be used for circuits which have a rating of 45A.
The #8 wire is not suitable since the maximum length for
a 45A circuit is 68’.
Solution: Use a #6 AWG wire suitable up to 110’.
NOTE: It is the contractors’s responsibility to follow the
NEC (USA) or CEC (Canada) when sizing the service
wire for this unit.
½
Localcodesoftenrequire a disconnectswitchlocatednearthe
unit; do not install the switch on the unit. Refer to the installa-
tioninstructionssupplied withtheindoorfurnace/airhandler for
specificwiringconnections andindoorunitconfiguration. Like-
wise, consult the instructions packaged with the thermostat
formountingandlocationinformation.
Overcurrent Protection
Thefollowingovercurrentprotectiondevicesareapprovedfor
use.
• Timedelayfuses
• HACRtype circuit breakers
These devices have sufficient time delay to permit the motor-
compressor to start and accelerate its load.
Refer to the unit serial plate and this table for the maximum
overcurrentprotectionpermitted.
Run all line voltage wiring a conduit from the service discon-
nectboxtotheunit.RefertotheNEC (USA) or CEC (Canada)
codesfor the correct size conduit basedon thewire size.The
conduitentersthecontrolboxthroughtheholeprovidedinthe
bottom.NOTE: Thecontrolboxhole is sizedfor3/4”conduit.If
permitted by code, a flexible conduit is preferred to minimize
vibrationtransmissionfrom the unit to the building.
Connect the line voltage wires to the L1, L2, and L3 terminals
of the definite purpose contactor (located in the unit control
box). Refer to the wiring diagram attached to the unit when
makingthese connections.
Three Phase Compressor Rotation
Use care when handling scroll compressors. Dome temp-
eratures could be hot.
CAUTION
Threephasescrolls arepowerphasedependent andcancom-
press in more than one direction.
Verifyproperrotation forthreephasecompressors byensuring
thesuctionpressuredrops and dischargepressureriseswhen
the compressor is energized. NOTE: When operated in re-
verse,athree phase scroll compressors is noisierand its cur-
rentdrawsubstantiallyreducedcomparedtomarkedvalues.
To correct, disconnect power and switch any two leads at the
unitcontactorandre-observe.
High Voltage Connections
Routepowersupply andgroundwiresthroughthe highvoltage
portandterminatein accordance with the wiring diagram pro-
videdinsidethecontrolpanelcover.
Low Voltage Connections
Condensing unit control wiring requires a two-conductor low
voltagecircuitfromtheroomthermostat.Thewiringshouldbe
no smaller than 18 AWG and the field connection for this cir-
cuit must be made in the unit control box using solderless
connectors (i.e. wire nuts). See the following diagram for a
typicallowvoltagehook-up.
SINGLE STATE LOW VOLTAGE HOOK-UP
YELLOW
BLACK WHITE
BLUE BLUE
THERMOSTAT CHT18-60
CONDENSING
UNIT
CKL090/120
Y1 W1 RG
AIR
HANDLER
AH090/120
RED
NOTES:
1). THERMOSTAT TO AIR HANDLER CABLE
MUST HAVE A MINIMUM OF (4) CONDUCTORS
2). AIR HANDLER TO CONDENSING UNIT CABLE
MUST HAVE A MINIMUM OF (2) CONDUCTORS
WIRE NUT
GREEN
System Start Up
Neveroperatethecompressor with the suctionvalve closedto
testthecompressor’spumpingefficiency.Insomecases,this
canresultinseriouscompressor damage and loss ofwarranty
coverage.
NOTICE
THIS UNIT IS SHIPPED WITH A NITROGEN/HELIUM
HOLDING CHARGE ONLY. UNIT MUST BE
EVACUATED AND CHARGED PER INSTALLATION
INSTRUCTIONS WITH REFRIGERANT LISTED ON
SERIAL RATING PLATE.
UNITS SHIPPED WITH A HOLDING CHARGE ARE
INTENDED FOR COMPONENT REPLACEMENT
ONLY ON EXISTING SYSTEMS, AND NOT
INTENDED FOR USE IN NEW SYSTEMS OR NEWLY
CONSTRUCTED HOMES.
NOTICE
NOTICE
UNITS MUST ONLY BE USED AS REPLACEMENT
COMPONENTS FOR PRE-2010 INSTALLED
SYSTEMS.

7
For the 7-1/2 ton unit starting charge should be 15 lb of R-22
and18lbsforthe10ton unit. The length of line set,indoorunit
airflow,condensingunitlocationandnumberof tubing fittings
willhaveanimpactonfinal unit charge amount. Turn the elec-
tricalpoweron,andletthesystemrun.Waitfortherefrigerant
pressures to stabilize.
Charge Verification
REFRIGERANT UNDER PRESSURE!
• Do not overcharge system with refrigerant.
• Do not operate unit in a vacuum or at negative pres-
sure.
Failure to follow proper procedures may cause
property damage, personal injury or death.
WARNING
Use refrigerant certified to AHRI standards. Use of used
refrigerant may cause compressor damage that is not
covered under warranty. Most portable machines cannot
clean used refrigerant to meetAHRI standards.
CAUTION
NOTICE
Violation of EPA regulations may result in fines or other
penalties.
Operating the compressor with the suction valve closed
may cause serious compressor damage.
CAUTION
Final ChargeAdjustment
Theoutdoortemperature mustbe60°For higher.Settheroom
thermostat to COOL, fan switch to AUTO, and set the tem-
peraturecontrolwellbelowroomtemperature.
After system has stabilized per startup instructions, check
subcoolingandsuperheatasdetailedinthefollowingsection.
Expansion Valve System
1. Purge gauge lines. Connect service gauge manifold
tobase-valveservice ports. Run systematleast10 min-
utes to allow pressure to stabilize.
2. Temporarilyinstallthermometer onliquid(small)linenear
liquidlineservice valve with adequate contactand insu-
lateforbest possible reading.
3.Checksubcoolingand superheat. Systems with TXV ap-
plication should have a subcooling of 11 ± 2 ºF and su-
perheat of 9 ± 1 ºF.
a. If subcooling and superheat are low, adjust TXV
to 9 ± 1 ºF superheat, then check subcooling.
NOTE: To adjust superheat, turn the valve stem clock-
wisetoincreaseandcounterclockwise todecrease.
b. If subcooling is low and superheat is high, add
charge to raise subcooling to 11 ± 2ºF then check
superheat.
c. If subcooling and superheat are high, adjust TXV
valveto9± 1 ºF superheat, then check subcooling.
d. If subcooling is high and superheat is low, adjust
TXVvalveto 9±1ºF superheatandremovecharge
to lower the subcooling to 11 ± 2ºF.
NOTE: DoNOTadjust thechargebasedonsuction pres-
sureunless there is agrossundercharge.
4. Disconnect manifold set, installation is complete.
Subcooling Formula = Sat. Liquid Temp. - Liquid Line Temp.
NOTE: Check the Schrader ports for leaks and tighten valve
cores if necessary. Install caps finger-tight.
NOTE: Subsequentopeningandreplaceofthecapwillrequire
only1/2 to1hex flat.Seethe tablebelowfor thetorquerequired
for an effective seal on the valve bonnet (1/6 turn past finger
tight.
TUBING SIZE TORQUE
(ft-lbs)
5/8 14
1 3/8 16
Afterclosing the valve bonnet, performafinalrefrigerantleak
test on the valves and sweat connections. Return the room
thermostat to the desired settings.
Troubleshooting
QualifiedInstaller/ServicerOnly
Whentroubleshooting,thefirst stepshouldalwaysbetocheck
forcleancoils,cleanfilter(s),andproper airflow. Indoor airflow
shouldbe375to 425 CFM pertonofcoolingbasedonthe size
of the outdoor unit. The most common way of establishing
indoor airflow is heating temperature rise. Indoor airflow will
then be (Heating output of equipment) / (1.1 x temp. rise). In
othercases,measurement of external static pressure is help-
ful.Fordetails,seetheInstallationInstructionsforyourindoor
unit.

8
TROUBLESHOOTING ANALYSIS TABLE
COMPLAINT PROBABLE CAUSE REMEDY
1. Excessive charge of refrigerant in system. 1. Purge or pump-down excessive charge.
2. Inadequate supply of air acrossthe 2. Make certain that coil is not fouled inany
condensercoil. way, or thatair is not re-circulating.
3. Non-condensate gases in the system. 3. Purge these gases from the system.
Recharge system, if necessary.
1. System low on refrigerant. 1. Charge system until sight glass is clearof bubbles.
2. Compressor valves broken. 2. Replace compressor.
1. Liquid line valve closed. 1. Open the liquid line valve.
2. Restricted liquid line. 2. Replace filter-dryer.
3. The bulb of the thermal expansion valve 3. Detach the bulb fromthe suction line and hold
has lost its charge. in one hand.If no liquid refrigerant goes through
the valve, replace the valve.
4. System low on refrigerant. 4. Test the unit for leaks.Add refrigerant until sight
glass is free from bubbles, after repairing leak.
5. Dirty filters. 5. Clean or replace filter.
6. Coil frosted up. 6. Defrostand clean coil. Clean or replace filters.
7. Flash gas in the liquid line. 7. Excessive liquid line drop.Check liquid line size.
8. Quantity of air through evaporator notadequate. 8. Increase the blowerspeed.
1. Expansion valve stuck open. 1. Correct valve action or replacethe valve.
2. Expansion valve bulb not in contact with 2. Fasten bulb securely to suction line.
suction line.
3. Suction and/or discharge valve leaking or broken. 3. Replace compressor.
1. Disconnect switch open. 1. Close the disconnect switch.
2. Blow fuse or fuse atdisconnect switch. 2. Check the cause of failure and replace the fuse.
3. Thermostat set too high. 3. Adjust to lowertemperature.
4. Selector switch in "Off" position. 4. Turn selector switch knob to "Cool" position.
5. Contactor and/or relay coils burned out. 5. Replace contactor and/or relay.
6. Loose or open electrical connection in either 6. Inspectand secureall electrical connections.
the control or power circuit.
5. Compressor will not start.
1. High Head Pressure
2. LowHead Pressure
3. LowSuction Pressure
4. High Suction Pressure
Wiring Diagram
HIGH VOLTAGE!
D
ISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT .
M
ULTIPLE POWER SOURCES MAY BE PRESENT . F AILURE TO DO SO MAY
CAUSE PROPERTY DAMAGE , PERSONAL INJURY OR DEATH .