Goodman GKS9 User manual

CUS
®
Copyright © 2006-2007, 2009 Goodman Manufacturing Company, L.P.
This manual is to be used by qualified, professionally trained HVAC technicians only. Goodman
does not assume any responsibility for property damage or personal injury due to improper
service procedures or services performed by an unqualified person.
•RefertoServiceManualRS6610004*forinstallation,operation,andtroubleshootinginformation.
•Allsafetyinformation must be followedasprovided in the ServiceManual.
•RefertotheappropriatePartsCatalog for part number information.
•Modelnumbers listed on page 3.
GKS9
40" 90% Gas Furnaces
®
RT6612017r2
June2009
TECHNICAL MANUTECHNICAL MANU
TECHNICAL MANUTECHNICAL MANU
TECHNICAL MANUALAL
ALAL
AL

PRODUCT IDENTIFICATION
2
Furnace Type
S: SingleStage/Multi-Speed
Themodelandmanufacturingnumberare usedforpositiveidentification ofcomponentpartsused inmanufacturing. When
engineeringand manufacturing changes take placewhereinterchangeabilityofcomponentsareaffected, the manufactur-
ingnumberwillchange.
Itisveryimportanttousethemodelandmanufacturingnumbersatalltimeswhenrequestingserviceorpartsinformation.
Product Type
G: Gas Furnace
Supply Type
Nominal Input
G K S 9 045 3 B X A
Additional Features
Major Revision
A:Initial Release
Airflow
Capability
3: 1200
4: 1600
5: 2000
Cabinet Width
A: 14"
B: 171/2"
C: 21"
D: 24 1/2"
C: Counterflow/Horizontal
M: Upflow/Horizontal
K: ResidentialUpflow
A
Minor Revision
A:Initial Release
Model Family
9: AirCommand 90
(40"Height)
045: 45,000Btuh
070: 70,000Btuh
090: 90,000Btuh
115: 115,000Btuh
N: Natural Gas
X: Low NOx
WARNING
WARNING HIGH VOLTAGE!
Disconnect ALL power before servicing or installing this unit. Multiple power
sources may be present. Failure to do so may cause property damage, personal
injury or death.
Installation and repair of this unit
should be performed ONLY by
individuals meeting the requirements of an "entry level
technician"asspecifiedbytheAir-Conditioning,Heating,
andRefrigerationInstitute(AHRI). Attemptingtoinstallor
repair this unit without such background may result in
product damage, personal injury or death.
Goodman will not be responsible
for any injury or property damage
arising from improper service or service procedures. If
you install or perform service on this unit, you assume
responsibility for any personal injury or property damage
which may result. Many jurisdictions require a license to
install or service heating and air conditioning equipment.
WARNING
WARNING WARNING
WARNING

PRODUCT IDENTIFICATION
3
Themodel andmanufacturingnumberare usedforpositiveidentification ofcomponentpartsused inmanufacturing. When
engineeringand manufacturing changes take placewhereinterchangeabilityofcomponentsareaffected, the manufactur-
ingnumberwillchange.
GKS90453BX*
GKS90703BX*
GKS90704CX*
GKS90904CX*
GKS90905DX*
GKS91155DX*
* Indicates minor revision & is not used for order entry or inventory management
The United States Environmental Protection Agency (“EPA”) has issued various regulations re-
garding the introduction and disposal of refrigerants introduced into this unit. Failure to follow
these regulations may harm the environment and can lead to the imposition of substantial fines.
These regulations may vary by jurisdiction. Should questions arise, contact your local EPA office.
WARNING
WARNING
Do not connect or use any device
that is not design certified by
Goodman for use with this unit.
Serious property damage, personal injury, reduced unit
performance and/or hazardous conditions may result
from the use of such non-approved devices.
WARNING
WARNING To prevent the risk of property
damage, personal injury, or death,
do not store combustible materials or use gasoline or
other flammable liquids or vapors in the vicinity of this
appliance.
WARNING
WARNING

4
PRODUCT DESIGN 2. Linevoltagewiring can enterthroughtherightor left side
ofthefurnace.Lowvoltage wiring can enter through the
rightor left side offurnace.
3. Conversionkits for high altitude natural or propane gas
operation are available. See High Altitude Derate chart
fordetails.
4. Installer must supply the following gas line fittings, de-
pendingon which entrance isused:
Left -- Two 90º Elbows, one close nipple, straight pipe.
Right --Straightpipe to reach gasvalve.
Accessibility Clearances (Minimum)
POSITION* FRONT SIDES REAR TOP FLUE FLOOR
Upflow - 0 0 1 0 C
Counterflow 1 0 0 1 0 NC
Horizontal 1 6 0 4 0 C
*= All positioning is determined as installed unit is viewed fromthe front.
C= If placed on combustible floor, floor MUST be wood only.
MINIMUM CLEARANCES TO COMBUSTIBLE MATERIALS
(INCHES)
NC= For instalaltion on non-combustible floors only. A combustible
subbase must be used for installations on combustible flooring.
36"atfront is required forservicing or cleaning.
Note: Inall cases accessibility clearanceshall take prece-
denceover clearancesfromtheenclosurewhere accessibil-
ityclearancesaregreater. Alldimensionsaregivenininches.
High Altitude Derate
Whenthis furnace is installedat high altitude, theappropri-
ate High Altitude orifice kit must be installed. This is re-
quiredduetothenatural reduction in the density of boththe
gas fuel and combustion air as altitude increases. The kit
will provide the proper design certified input rate within the
specifiedaltituderange.
0 - 7,000 ft. 7,001-9,000 ft. 9,001-11,000 ft. 7,001-11,000 ft. 7,001-11,000 ft.
LPT-00A
Propane
Conversion Kit
(#55 Orifices)
TBD TBD TBD TBD
PROPANE AND HIGH ALTITUDE KITS
High altitude kits are purchased according to the installa-
tionaltitudeandusageofeithernaturalorpropanegas.Refer
tothechartaboveforatabular listing of appropriate altitude
rangesandcorrespondingmanufacturer’shighaltitudeNatu-
ralGasandPropaneGaskits.For a tabular listing of appro-
priatealtituderangesandcorrespondingmanufacturer'sHigh
Altitude Pressure Switch kits, refer to either the Pressure
Switch Trip Points & Usage Chart in this manual or the Ac-
cessoryCharts in Service Instructions.
GeneralOperation
TheGKS9furnacesareequipped with an electronic ignition
deviceusedto light the burners and an induced draft blower
to exhaust combustion products.
Aninterlockswitchprevents furnace operation if theblower
door is not in place. Keep the blower access door in place
exceptforinspection and maintenance.
This furnace is also equipped with a self-diagnosing elec-
tronic control module. In the event a furnace component is
notoperating properly, the control moduleLED will flashon
and off in a factory-programmed sequence, depending on
theproblemencountered. This light canbeviewed through
theobservationwindowin the blower access door.Referto
theTroubleshootingChartforfurther explanation of theLED
codesandAbnormal Operation - Integrated Ignition Control
section in the Service Instructions for an explanation of the
possibleproblem.
Theratedheatingcapacityof the furnace should be greater
thanor equal to thetotal heat lossof the area tobe heated.
The total heat loss should be calculated by an approved
methodorinaccordance with “ASHRAE Guide” or “Manual
J-LoadCalculations” published by theAirConditioningCon-
tractors of America.
*Obtain from: American National Standards Institute 1430
BroadwayNewYork,NY10018
LocationConsiderations
• The furnace should be as centralized as is practical
with respect to the air distribution system.
• Donotinstallthefurnacedirectly on carpeting, tile, or
combustiblematerialotherthanwood flooring.
• When suspending the furnace from rafters or joists,
use 3/8" threaded rod and 2” x 2” x 3/8” angle as
shownin theInstallationand ServiceInstructions.The
length of the rod will depend on the application and
clearancenecessary.
• When installed in a residential garage, the furnace
mustbe positioned so the burnersandignitionsource
are located not less than 18 inches (457 mm) above
the floor and protected from physical damage by ve-
hicles.
Notes:
1. Installermustsupply oneortwoPVC pipes:oneforcom-
bustionair(optional)andonefortheflueoutlet(required).
Ventpipemustbeeither2”or3” in diameter, depending
uponfurnaceinput,numberofelbows,lengthofrunand
installation (1 or 2 pipes). The optional Combustion Air
Pipeis dependentoninstallation/coderequirements and
must be 2” or 3” diameter PVC.

5
COMPONENT IDENTIFICATION
1 GasValve
2 GasLineEntrance(Alternate)
3 CombustionAirIntakeConnection/ “Coupling”
4 HotSurface Igniter
5 Burners
6 RolloutLimit
7 FlameSensor
8 FluePipeConnection/“Coupling”
9 FluePipe (Internal)
10 Primary Limit
11 Pressure Switch
12 Gas Line Entrance
13 Rubber Elbow
14 Flue Pipe Connection (Alternate)
15 Induced DraftBlower
16 Electrical Connection Inlets (Alternate)
17 Coil Front CoverDrainPort
18 Drain Line Penetrations
19 Blower Door Interlock Switch
20 24-Volt Thermostat Connections
21 Integrated ControlModule
(withfuseand diagnostic LED)
22 Transformer (40VA)
23 Circulator Blower
24 Auxiliary Limit
25 Gas Manifold
26 Junction Box
27 Coil FrontCover
28 DrainTrap
29 Electrical Connection Inlets
Upflow/Horizontal
8
7
6
5
4
3
2
1
27
26
17
18
24
23 22
21
20
19
18
17
16
15
13 14
12
10
11
9
29
25
28
BLOWER COMPARTMENT BURNER COMPARTMENT
6

COMPONENT IDENTIFICATION
6
GKS9
NOTE: Airflow area will be reduced by approximately 18% if duct flanges are not unfolded. This could cause
performance issues and noise issues.
Cabinet Size A B C D E
13-5/8
17-1/2
20-7/8
All dimensions are in inches.
GKS90453BX*
GKS90703BX*
GKS90704CX*
GKS90904CX*
GKS90905DX*
GKS91155DX*
16
19-1/2
23
17-1/2
21
24-1/2
12-1/8
16
19-3/8
12-15/16
15-15/16
20-7/16
LOW VOLTAGE
ELECTRICAL HOLE
HIGH VOLTAGE
ELECTRICAL HOLE
SIDE CUT-OUT
LEFT SIDE VIEW
SIDE CUT-OUT
LOW VOLTAGE
ELECTRICAL HOLE
RIGHT SIDE
DRAIN LINE
HOLES
STANDARD GAS
SUPPLY HOLE
DRAIN
TRAP
20 13/16
AIR
INTAKE
PIPE
2" PVC
LEFT SIDE
DRAIN LINE HOLES
1 5/8
RIGHT SIDE VIEW
CONDENSATE
DRAIN TRAP
w/ 3/4" PVC
DISCHARGE
(RIGHT OR
LEFT SIDE)
2
C
B
FRONT VIEW
A
(DISCHARGE)
1 1/2
HIGH VOLTAGE
ELECTRICAL HOLE
UNFOLDED FLANGES
1
22 1/16
FOLDED FLANGES
UNFOLDED FLANGES
FOLDED FLANGES
23 9/16
A
IR
DISCHARGE
AIR
DISCHARGE

7
PRODUCT DESIGN
*GKS9 furnaces are shipped without coil cover pressure switches. All GKS9 models are shipped from the factory as Dedicated Upflow but can
be installed as a Horizontal Left or a Horizontal Right, ONLY after installing GKS9 Horizontal Installation Kit 0270K00012, which contains
Pressure Switch 20197312.
GKS90453BX* -1.40 -1.20 -0.52 -0.37
GKS90703BX* -1.30 -1.10 -0.52 -0.37
GKS90704CX* -1.30 -1.10 -0.52 -0.37
GKS90904CX* -1.10 -0.95 -0.52 -0.37
GKS90905DX* -0.90 -0.75 -0.52 -0.37
GKS91155DX* -1.30 -1.10 -0.52 -0.37
PRESSURE SWITCH TRIP POINTS AND USAGE CHART
NEGATIVE PRESSURE
ID BLOWER
WITH FLUE FIRING
TYPICAL SEA
LEVEL DATA
NEGATIVE PRESSURE
COIL COVER
WITH FLUE FIRING
TYPICAL SEA
LEVEL DATA
NEGATIVE PRESSURE
COIL COVER
WITH FLUE NOT FIRING
TYPICAL SEA
LEVEL DATA
MODEL
NEGATIVE PRESSURE
ID BLOWER
WITH FLUE NOT FIRING
TYPICAL SEA
LEVEL DATA
MODEL
TRIP POINT
COIL COVER
PRESSURE
SWITCH
COIL COVER
PRESSURE
SWITCH
PART #*
TRIP POINT
ID BLOWER
PRESSURE
SWITCH
ID BLOWER
PRESSURE
SWITCH
PART #*
TRIP POINT
COIL COVER
PRESSURE
SWITCH
TRIP POINT
ID BLOWER
PRESSURE
SWITCH
HIGH
ALTITUDE
KIT
GKS90453BX* -0.37 20197312 -1.20 0130F00001P TBD TBD TBD
GKS90703BX* -0.37 20197312 -1.10 0130F00000P TBD TBD TBD
GKS90704CX* -0.37 20197312 -1.10 0130F00000P TBD TBD TBD
GKS90904CX* -0.37 20197312 -0.95 0130F00002P TBD TBD TBD
GKS90905DX* -0.37 20197312 -0.75 0130F00004 TBD TBD TBD
GKS91155DX* -0.37 20197312 -1.10 0130F00001P TBD TBD TBD
PRESSURE SWITCH TRIP POINTS AND USAGE
0 to 7,000 ft. 7,001 to 11,000 ft.
(1) Data given for the flue not firing is least negative pressure required for switch to close.
(2) Data given for the flue firing is least negative pressure required for the switch to remain closed.
Note: All negative pressure readings are in inches of water column (" w.c.).
Note: For installations in Canada, this 90% furnace is certified only to 4500.ft.

8
PRODUCT DESIGN
Part Number 20162903 20162904 20162906
Open Setting (°F) 160 150 170
GKS90453BX* 1
GKS90703BX* 1
GKS90704CX* 1
GKS90904CX* 1
GKS90905DX* 1
GKS91155DX* 1
T.O.D. PRIMARY LIMIT
Part Number 10123514 or
10123533
Open Setting (°F) 200
GKS90453BX* 1
GKS90703BX* 2
GKS90704CX* 2
GKS90904CX* 2
GKS90905DX* 2
GKS91155DX* 2
ROLLOUT LIMIT SWITCHES
Part Number 10123519 10123535
Open Setting (°F) 160 150
GKS90453BX* 1
GKS90703BX* 1
GKS90704CX* 1
GKS90904CX* 1
GKS90905DX* 1
GKS91155DX* 1
AUXILIARY LIMIT SWITCHES

9
PRODUCT DESIGN
Coil Matches:
Coil Matches (for Goodman®units using R22 and R-410A):
• All CAPF coils in B, C, & D widths have insulated blank off plates for use with one size smaller furnaces.
• All CAPF coils have a CAUF equivalent.
• All CHPF coils in B, C & D heights have an insulated Z bracket for use with one size smaller furnace.
• All proper coil combinations are subject to being ARI rated with a matched outdoor unit.
A large array of Amana®brand coils are available for use with the GKS9 furnaces, in either upflow, counterflow, or
horizontalapplications. These coilsareavailableinboth cased anduncasedmodels(withthe option ofafieldinstalledTXV
expansion device). These 90%+ furnaces match up with the existing Amana®brand coils as shown in the chart below.
C A P F 1824 A 6 A
PRODUCT
TYPE:
C: Indoor Coil
CABINET FINISH:
U:Unpainted
P: Painted
N:Unpainted Case
EXPANSION
DEVICE:
F: Flowrate
r
NOMINAL CAPACITY RANGE
@ 13 SEER
1824: 1 1/2 to 2 Tons
3030: 2 1/2 Tons
3636: 3 Tons
3642: 3 to 3 1/2 Tons
3743: 3 to 3 1/2 Tons
4860: 4 & 5 Tons
4961: 4 & 5 Tons
REVISION
A: Revision
NOMINAL WIDTH FOR GAS FURNACE
A:Fits 14" Furnace Cabinet
B: Fits 17 1/2" Furnace Cabinet
C: Fits 21" Furnace Cabinet
D: Fits 24 1/2" Furnace Cabinet
N: Does Not Apply (Horizontal SlabCoils)
APPLICATION
A: Upflow/Downflow Coil
H: Horizontal A Coil
S: Horizontal Slab Coil
REFRIGERANT
CHARGE:
6: R-410A or R-22
2: R-22
4: R-410a

10
PRODUCT DESIGN
Thermostats:
NOTE: Complete lineup of thermostats can be found in the Thermostat Specification Sheets.
Filters:
Filters are required with this furnace and must be provided by the installer. The filters used must comply with UL900 or
CAN/ULCS111standards.Installing this furnace withoutfilterswill void the unitwarranty.
This furnace has provisions for the installation of return air filters at the side and/or bottom return. The furnace will
accommodatethe following filter sizes depending on cabinet size:
RefertoMinimumFilterAreatablestodeterminefilterarearequirement.NOTE:Filterscanalsobeinstalledelsewherein
the duct system such as a central return.
Upflow Filters
Disposable Minimum Filter Area (in2)
[Based on a 300 ft/min filter face velocity]
*Minimum filter area dictated by heating airflow requirement. Permanent Minimum Filter Area (in2)
[Based on 600 ft/min filter face velocity]
*Minimum filter area dictated by heating airflow requirement.
Cabinet
Width
(in.)
Nominal
Filter Size
(in.)
Approx.
Flow Area
(in2)
Cabinet
Width
(in.)
Nominal
Filter Size
(in.)
Approx.
Flow Area
(in2)
All 16 x 25 x 1 400 17-1/2 14 x 25 x 1 350
21 16 x 25 x 1 400
24-1/2 20 x 25 x 1 500
BOTTOM RETURNSIDE RETURN
600 800 1000 1200 1400 1600 2000
0453_X* 188* 192 240 288 --- --- ---
0703_X* --- 282* 282* 282* 336 --- ---
0704_X* --- --- 260* 260* 336 384 ---
0904_X* --- --- 376* 376* 376* 384 ---
0905_X* --- --- --- 376* 376* 384 480
115_X* --- --- --- 470* 470* 470* 480
Input__Airflow
COOLING AIRFLOW REQUIREMENT (CFM)
600 800 1000 1200 1400 1600 2000
0453_X* 376* 384 480 576 --- --- ---
0703_X* --- 564* 564* 564* 672 --- ---
0704_X* --- --- 564* 564* 672 768 ---
0904_X* --- --- 752* 752* 752* 768 ---
0905_X* --- --- --- 752* 752* 768 800
1155_X* --- --- --- 940* 940* 940* 800
Input__Airflow
COOLING AIRFLOW REQUIREMENT (CFM)

FURNACE SPECIFICATIONS
11
1. These furnaces are manufactured for natural gas operation. Optional kits are available for conversion to propane operation.
2. For elevations above 2000 feet the rating should be reduced by 4% for each 1000 feet above sea level. The furnace must not be derated, orifice changes should
only be made if necessary for altitude.
3. The total heat loss from the structure as expressed in TOTAL BTU/HR must be calculated by the manufacturers method or in accordance with the "A.S.H.R.A.E.
GUIDE" or "MANUAL J-LOAD CALCULATIONS" published by the AIR CONDITIONING CONTRACTORS OF AMERICA. The total heat loss calculated should be
equal to or less than the heating capacity. Output based on D.O.E. test procedures, steady state efficiency times output.
4. Minimum Circuit Ampacity calculated as: (1.25 x Circulator Blower Amps) + I.D. Blower Amps.
Unit specifications are subject to change without notice. ALWAYS refer to the units serial plate for the most up-to-date general and electrical information.
(1) Wire size should be determined in accordance with National Electrical Codes. Extensive wire runs will require larger wire sizes.
(2) Maximum Overcurrent Protection Device: MUST use Time Delay Fuse or HACR type Circuit Breaker of the same size as noted.
(3) See Installation Instructions for appropriate vent diameter, length and number of elbows.
(4) See Installation Instructions for appropriate combustion air pipe diameter, length and number of elbows.
NOTE: This data is provided as a guide, it is important to electrically connect the unit and properly size fuses/circuit breakers and wires in
accordance with all national and/or local electrical codes. Use copper wire only.
MODEL GKS9
0453BX* GKS9 0703BX* GKS9 0704CX* GKS9 0904CX* GKS9 0905DX* GKS9 1155DX*
Btuh
Input (US) 46,000 69,000 69,000 92,000 92,000 115,000
Output (US) 42,800 64,400 63,900 86,000 86,000 106,500
Input (CAN) 46,000 69,000 69,000 92,000 92,000 115,000
Output (CAN) 42,800 64,400 63,900 86,000 85,300 106,500
A.F.U.E. 92.1% 92.1% 92.1% 92.1% 92.1% 92.1%
Rated External Static (" w.c.) .20 - .50 .20 - .50 .20 - .50 .20 - .50 .20 - .50 .20 - .50
Temperature Rise (°F) 35 - 65 35 - 65 35 - 65 35 - 65 35 - 65 35 - 65
ID Blower Pressure Switch Trip Point (" w.c.) -1.20 -1.10 -1.10 -0.95 -0.75 -1.10
Blower Wheel (D" x W") 10 x 8 10 x 8 10 x 10 10 x 10 11 x 10 11 x 10
Blower Horsepower 1/3 1/3 1/2 1/2 3/4 3/4
Blower Speeds 4 4 4 4 4 4
Max CFM @ 0.5 E.S.P. 1200 1200 1600 1600 2000 2000
Power Supply 115-60-1 115-60-1 115-60-1 115-60-1 115-60-1 115-60-1
Minimum Circuit Ampacity (MCA)(1) 9.4 9.4 13.8 13.8 13.2 13.2
Maximum Overcurrent Device(2) 15.0 15.0 15.0 15.0 15.0 15.0
Transformer (VA) 40 40 40 40 40 40
Primary Limit Setting (°F) 150 160 160 150 160 170
Auxiliary Limit Setting (°F) 150 150 150 150 150 160
Rollout Limit Setting (°F) 200 200 200 200 200 200
Fan Delay On Heating 30 secs. 30 secs. 30 secs. 30 secs. 30 secs. 30 secs.
Off Heating 150 secs. 150 secs. 150 secs. 150 secs. 150 secs. 150 secs.
Fan Delay On Cooling 6 sec. 6 sec. 6 sec. 6 sec. 6 sec. 6 sec.
Off Cooling 45 secs. 45 secs. 45 secs. 45 secs. 45 secs. 45 secs.
Gas Supply Pressure (Natural/Propane) ("w.c.) 7 / 11 7 / 11 7 / 11 7 / 11 7 / 11 7 / 11
Manifold Pressure (Natural/Propane) ("w.c.) 3.5 / 10 3.5 / 10 3.5 / 10 3.5 / 10 3.5 / 10 3.5 / 10
Orifice Size (Natural/Propane) 43 / 55 43 / 55 43 / 55 43 / 55 43 / 55 43 / 55
Number of Burners 2 3 3 4 4 5
Vent Connector Diameter (inches) (3) 222222
Combustion Air Connector Diameter (inches)(4) 222222
Shipping Weight (lbs.) 132 135 153 158 170 175

BLOWER PERFORMANCE SPECIFICATIONS
12
1. CFM in chart is without filters(s). Filters do not ship with this furnace, but must be provided by the installer. If the furnace requires two
return filters, this chart assumes both filters are installed.
2. All furnaces ship as high speed cooling. Installer must adjust blower cooling speed as needed.
3. For most jobs, about 400 CFM per ton when cooling is desirable.
4. INSTALLATIONISTOBEADJUSTEDTOOBTAINTEMPERATURERISEWITHINTHERANGESPECIFIEDON THERATINGPLATE.
5. The chart is for information only. For satisfactory operation, external static pressure must not exceed value shown on rating plate. The
shaded area indicates ranges in excess of maximum external static pressure allowed when heating. The data for 0.6" w.c. to 0.8" w.c.
is shown for air conditioning purposes only.
6 The dashed (---) areas indicate a temperature rise not recommended for this model.
7. The above chart is for U.S. furnaces installed at 0-4000 feet. At higher altitudes, a properly derated unit will have approximately the
same temperature rise at a particular CFM, while the ESP at that CFM will be lower.
Tons AC
at 0.5" 0.6 0.7 0.8
ESP CFM RISE CFM RISE CFM RISE CFM RISE CFM RISE CFM CFM CFM
HIGH 3.0 1352 --- 1318 --- 1260 --- 1202 --- 1128 --- 1044 955 853
GKS90453BX* MED 2.5 1214 --- 1172 --- 1123 --- 1064 --- 1012 --- 938 859 741
(LOW) MED-LO 2.0 997 --- 994 --- 960 35 923 36 884 38 817 741 611
LOW 1.5 757 44 753 44 734 45 704 47 674 49 620 524 438
HIGH 3.0 144936140937132639127341120143119411361018
GKS90703BX* MED 2.5 119243117244114145109447104649 973904793
(MED-HI) MED-LO 2.0 981 53 962 54 943 55 917 56 888 58 830 764 665
LOW 1.5 750 --- 730 --- 714 --- 692 --- 657 --- 620 570 502
HIGH 4.0 2069 --- 1965 --- 1871 --- 1756 --- 1661 --- 1549 1415 1275
GKS90704CX* MED 3.5 1752 --- 1724 --- 1667 --- 1603 --- 1488 35 1402 1290 1082
(LOW) MED-LO 3.0 14373614373614173613693813203912561140984
LOW 2.5 1184 44 1177 44 1161 44 1132 46 1095 47 1047 928 837
HIGH 4.0 1970---187435175738166740156642143113341182
GKS90904CX* MED 3.5 1713 39 1650 40 1572 42 1510 44 1418 47 1313 1211 1079
(MED-LO) MED-LO 3.0 14394614124713704813275012605311661078956
LOW 2.5 1183 56 1155 57 1122 59 1108 60 1062 62 1011 931 816
HIGH 5.0 2147 --- 2114 --- 2057 --- 2030 --- 1978 --- 1889 1784 1713
GKS90905DX* MED 4.0 1675 40 1686 --- 1640 40 1623 41 1557 43 1501 1455 1360
(MED-LO) MED-LO 3.5 148945147045143646140947136149131812431130
LOW 3.0 13075112655212345412035511685710961053991
HIGH 5.0 213440210340202942194144190644181817331625
GKS91155DX* MED 4.0 1678 51 1643 52 1643 52 1577 54 1527 56 1489 1423 1339
(MED-HI) MED-LO 3.5 145358144059142659136362134963131412531205
LOW 3.0 1259 67 1239 68 1220 70 1181 --- 1159 --- 1118 1082 1015
BLOWER PERFORMANCE
0.1 0.2 0.3 0.4 0.5
(CFM & Temperature Rise vs. External Static Pressure)
Model
Heating Speed
As Shipped
Motor
Speed
EXTERNAL STATIC PRESSURE (Inches Water Column)
()

BLOWER PERFORMANCE SPECIFICATIONS
13
30 40 50 60 70 80 90 110 120
100 130 140 150
100
90 80
70 60 50
40 30 20
10
OUTPUT BTU/HR x 1000
BTU OUTPUT vs TEMPERATURE RISE CHART
TEMPERATURE RISE
600 CFM
700
900
1000
1100
1200
1400
1600
1800
2000
2200
2400 CFM
FORMULAS
BTU OUTPUT = CFM x 1.08 x RISE
RISE = BTU OUTPUT
1.08 ÷ CFM
800

14
WIRING DIAGRAMS
HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
GKS9*****X**
R
YLYELLOW
ORORANGE
PUPURPLE
GNGREEN
BKBLACK
BRBROWN
WHWHITE
BLBLUE
GYGRAY
RDRED
COLORCODES:
LOW
VOLTAGE
(24V)
LOW
VOLTAGE FIELD
HI
VOLTAGE (115V)
HI
VOLTAGE FIELD
NOTES:
1.SETHEATANTICIPATORONROOMTHERMOSTATAT0.7AMPS.
2.MANUFACTURER'SSPECIFIEDREPLACEMENTPARTSMUSTBEUSEDWHENSERVICING.
0140F00236REV.D
OR (MED LOW)
BL (MED)
RD (LOW)
GAS
VALVE
C2
CGW
INTERNAL TO
INTEGRATED
CONTROL
JUNCTION
EQUIPMENT
GND
FIELD
GND
DIAGNOSTIC
LED
2 CIRCUIT
CONNECTOR
HOT
SURFACE
IGNITER
OVERCURRENT
PROT.
DEVICE
IGNITER
TH (3)
INTEGRATED
CONTROLMODULE
JUNCTION
BOX
LINE-H
XFMR-H
INTEGRATEDCONTROLMODULE
INTEGRATEDCONTROLMODULE
GND
DISCONNECT
LN
OVERCURRENT PROTECTION DEVICE
RD
BL
BK
4.IFHEATINGANDCOOLINGBLOWERSPEEDSARENOTTHESAME,DISCARDJUMPERBEFORECONNECTINGBLOWERLEADS.UNUSED
BLOWERLEADSMUSTBEPLACEDON"PARK"TERMINALSOFINTEGRATEDCONTROLORTAPED.
3.IFANYOFTHEORIGINALWIREASSUPPLIEDWITHTHEFURNACEMUSTBEREPLACED,ITMUSTBEREPLACEDWITHWIRINGMATERIAL
HAVINGATEMPERATURERATINGOFATLEAST105
TERMINALSWITCH
(PRESS.)
5.UNITMUSTBEPERMANENTLYGROUNDEDANDCONFORMTON.E.C.ANDLOCALCODES.
PK PINK
115 VAC HOT AND
PARK
TERMINALS
LINE-H
FLAME
SENSOR
BK
PLUG
CONNECTION
FIELD
SPLICE
SWITCH
(TEMP.)
OR
24VTHERMOSTAT
CONNECTIONS
GR
GND
115VAC
24VAC
BLOWER
COMPARTMENT
DOORSWITCH
(OPENWHEN
DOOROPEN)
DOOR
SWITCH
BK
GND
L
N
WH
JUNCTION
BOX
1
OR
ID
BLOWER
PRESSURE
SWITCH
HEAT-H
GNDWH
RD
WH
GND
BURNER
COMPARTMENT
BLOWER
COMPARTMENT
NOTE
4
SEE
N
O
COOL-H
BK (HI)
BRBR
CAPACITOR
YL
WH
BL
PU
RD
OR
PK
BK
WHWH
BLOWER
INDUCED
DRAFT
MANUAL RESET
AUXILIARY
LIMIT
IN
UPFLOW
BLOWER
DECK
C
FS
HEAT-H
COOL
IGNITER
HOT
SURFACE
IND
IGN
BLWR
CIRCULATOR
BLWR
ID
FLAME
SENSOR
115
VAC
TRANSFORMER
40
VA
24
VAC
GND
RO1 (5)
RO2
(11)
HLO
(1)
HLI
(7)
MVC(9)
GND(8)
TR(6)
OR
WH
WH
BL
YL OR
RD
GR BR
PK
PK
WH
115 VAC NEUTRAL
BK
BK
BK
GY
24V THERMOSTAT CONNECTIONS
MICRO
TO
C
G
Y
W
R
2
WH
OR
BL
YL
OR
PK
RD
OR
WH
XFMR-H
TERMINALS
BL
GY
GR
1
2
3
121110
987
654
°C.USECOPPERCONDUCTORSONLY.
24VAC
HUMIDIFIER
24
VAC
HUMIDIFIER
HUMIDIFIER
PSO (4)
MV(12)
PS
(10)CNO
IDBLOWER
PRESSURE
SWITCH
0
C
6
5
4
3
2
1
OFF = CONTROL FAILURE
STEADY
ON = NORMAL OPERATION
1FLASH
=
2FLASHES
= PRESSURE SWITCH STUCK CLOSED
3FLASHES
= PRESSURE SWITCH STUCK OPEN
4FLASHES
= OPEN HIGH LIMIT
5FLASHES
= FLAME SENSE WITHOUT GAS VALVE
6FLASHES =
CONTINUOUS/RAPID
FLASHES
= REVERSED 115 VAC POLARITY
CONTROL
MODULE
INTEGRATED
FUSE
MI
GY
GY
M1
GAS
VALVE
C2
TO 115VAC/ 1Ø
/60 HZ POWER SUPPLYWITH
PU
Y
BR
GY
BR
LINE NEUTRALS
NOC
OPTIONAL FRONT COVER
PRESSURE
SWITCH
C
N
O
OPTIONAL
FRONT COVER
PRESSURE
SWITCH