Goodman Gds8 Technical document

GDS8, GMS8, GHS8

40" 80% Gas Furnace Units

•RefertoServiceManualRS6610004forinstallation,

operation,andtroubleshootinginformation.

•Allsafetyinformation must be followedasprovided in

theServiceManual.

•RefertotheappropriateParts Catalog for part number

information.

Models listed on

page3

TECHNICALINFORMATION MANUAL

RT6622004Rev.1

September2007

This manual is to be used by qualified, professionally trained HVAC

technicians only. Goodman does not assume any responsibility for

property damage or personal injurydue to improper service procedures

performed by an unqualified person.

PRODUCT IDENTIFICATION

Themodelandmanufacturingnumberareusedforpositiveidentificationofcomponentpartsusedinmanufacturing. Please

usethesenumberswhen requesting service or parts information.

Description

Air Flow Direction

KBTUH

AFUE

G M S 8 070 3 B N A

Major Revision

Maximum CFM

@ 0.5" ESP

3: 1200

4: 1600

5: 2000

Cabinet Width

045: 45,000

070: 70,000

090: 90,000

115: 115,000

140: 140,000

8: 80%

S:Single-Stage/Multi-Speed

N:Natural Gas

X:LowNOx

NOx

A:InitialRelease

A: 14"

B: 17 1/2"

C: 21"

D: 24 1/2"

D:Dedicated Downflow

H:HighAirflow

M:Upflow/Horizontal

Product Type

G: Goodman or

Distinction

Minor

Revision

A: Initial

Release

WARNING

HIGHVOLTAGE!

DisconnectALLpowerbeforeservicingorinstallingthisunit.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" as specified by the

Air Conditioning and Refrigeration Institute (ARI) may use this information.

Attempting to install or repair this unit without such background may result

in product damage, personal injury or death.

WARNING

Goodmanwillnotberesponsibileforanyinjuryorpropertydamagearising

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.

PRODUCT IDENTIFICATION

The model and manufacturing number are used for positive identification of component parts used in manufacturing.

Pleaseusethese numbers when requesting serviceorparts information.

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.

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

suchnon-approveddevices.

WARNING

WARNING The United States Environmental Protection Agency (“EPA”) has issued

various regulations regarding 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.

GHS80453AN*

GHS80704BN*

GHS80905CN*

GMS80453AN*

GMS80703AN*

GMS80704BN*

GMS80904BN*

GMS80905CN*

GMS81155CN*

GMS81405DN*

GDS80453AN*

GDS80703AN*

GDS80904BN*

GDS81155CN*

* These models available in Low NOx

PRODUCT DESIGN

NFPA 54/ANSI Z223.1 - latest edition. In Canada, the fur-

nacesmust be ventedinaccordancewiththe National Stan-

dardofCanada, CAN/CSA B149.1 and CAN/CSA B149.2-

latesteditions and amendments.

NOTE: Theverticalheightof the Category I ventingsystem

must be at least as great as the horizontal length of the

ventingsystem.

Accessibility Clearances (Minimum)

Unobstructed front clearanace of 24" for servicing is rec-

ommended.

SW B

1036 11

* 24" clearnace for serviceability recommended.

MINIMUM CLEARANCE TO COMBUSTIBLE MATERIALS - INCHES

** Single Wall Vent (SW) to be used only as a conncetor.

Refer to the venting tables outlined in the Installation Manual for

additional venting requirements.

Vent

Sides TopRear Front*

Note: Inall cases accessibility clearance shall take prece-

denceover clearancesfromtheenclosure where 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.

2000 3000 4000 4500 5000 6000 7000 8000

US BURNER

ORIFICE 44/55 44/55 45/56 45/56 46/57 47/58 47/58

CANADA BURNER

ORIFICE 44/55 47/57

HA-02 HIGH ALTITUDE CONVERSION KIT REQUIRED

Tabled data is based upon the furnace input being reduced for altitudes above sea level. U.S. 4% per 1,000 feet.

Canada 10% derate for 2,000-4,000 feet.

ELEVATION ABOVE SEA-LEVEL (FEET)

INPUT PER BURNER - 22,500 BTUH NATURAL GAS / 20,000 BTUH L.P.

High altitude kits are purchased according to the installa-

tionaltitudeandusageof eithernatural orpropanegas.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

TheG*S8furnaces are equipped with anelectronicignition

deviceused to light the burners and an induced draft blower

to exhaust combustion products.

An interlock switch prevents furnace operation if the inner

blowerdoor is not inplace. Keep the blower access door in

placeexceptfor inspection and maintenance.(See illustra-

tion on pages 5 and 6.)

This furnace is also equipped with a self-diagnosing elec-

tronic control module. In the event a furnace component is

notoperating properly, the controlmoduleLED will flashon

and off in a factory-programmed sequence, depending on

theproblemencountered. This light canbe viewed through

theobservationwindowin the blower access door.Referto

theTroubleshootingChartforfurther explanation oftheLED

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 the total heat lossof the area to be 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 installed in a residential garage, the furnace

mustbe positioned so theburnersandignitionsource

are located not less than 18 inches (457 mm) above

the floor and protected from physical damage by ve-

hicles.

Notes:

WARNING

TO PREVENT POSSIBLE PERSONAL INJURY OR DEATH DUE TO ASPHYXIATION,

THIS FURNACE MUST BE CATEGORY IVENTED. DO NOT VENT USING

CATEGORY III VENTING.

CategoryI Venting is ventingat a non-positive pressure. A

furnace vented as Category I is considered a fan-assisted

appliance and the vent system does not have to be “gas

tight.” NOTE: Singlestagegasfurnaceswithinduced draft

blowers draw products of combustion through a heat ex-

changerallowing,in some instances, common ventingwith

naturaldraftappliances(i.e.waterheaters). All installations

mustbeventedinaccordancewithNationalFuelGasCode

COMPONENT IDENTIFICATION

Junction Box

Inshot Burner

Gas Valve

Integrated Control Module

Gas Manifold

Rollout Limit

Primary Limit

Gas Line

Entrance

Induced Draft

Blower

Pressure

Switche(es)

Flue Pipe

Connection

Transformer

Gas Line Entrance

(Alternate)

Transformer

Blower Door

Interlock

Switch

Integrated

Control

Module

Pressure Switch(es)

1 GasValve

2 GasLineEntrance(Alternate)

3 PressureSwitch(es)

4 GasManifold

5 RolloutLimit

6 InshotBurners

7 Primary Limit

8 GasLineEntrance

9 FluePipeConnection(Alternate)

Downflow Models

10 InducedDraft Blower

11 BlowerDoor InterlockSwitch

12 IntegratedControl Module

(withfuseand diagnostic LED)

13 Transformer(40 VA)

14 CirculatorBlower

15 JunctionBox

COMPONENT IDENTIFICATION

Upflow/Horizontal

1 GasValve

2 GasLineEntrance(Alternate)

3 PressureSwitch(es)

4 GasManifold

5 RolloutLimit

7 Primary Limit

8 GasLineEntrance

9 FluePipeConnection(Alternate)

10 InducedDraft Blower

11 BlowerDoor InterlockSwitch

12 IntegratedControl Module

(withfuseand diagnostic LED)

13 Transformer(40 VA)

14 CirculatorBlower

15 JunctionBox

Pressure Switch

Flue Pipe Connection

Circulator

Blower

Gas Line

Entrance

Gas Line Entrance

(Alternate)

Inshot Burner

Induced Draft Blower

Gas Manifold

Rollout Limit

Primary Limit

Integrated Control Module

Junction

Box Transformer

Blower Door Interlock Switch

PRODUCT DIMENSIONS GMS8 / GHS8

MODEL A B MODEL A B

GMS80453A** GHS80453A* 14 1/2" 12 1/2"

GMS80703A** GHS80704B** 17 1/2" 16"

GMS80704B** GHS80905C** 21" 19 1/2"

GMS80904BN*

GMS80905B**

GMS8115CB**

GMS81405D** 24 1/2" 23"

14 1/2" 12 1/2"

17 1/2" 16"

21" 19 1/2"

PRODUCT DIMENSIONS



















&

'

GAS INLET

ALT. GAS INLET

HIGH VOLTAGE

LOW VOLTAGE



8ǫ”

”

28”

39”

”

11Ǫ”

10¼”

4”

1Ǫ”19ǫ”

GDS8

MODEL A B

GDS80453A**

GDS80703A**

GDS80904B** 17 1/2" 16"

GDS81155C** 21" 19 1/2"

14 1/2" 12 1/2"

PRODUCT DESIGN

For installations in Canada, the GMS and GHS furances are certifed only to 4,500 ft.

* Negative pressure readings are in inches of water column (*w.c.)

GMS8 & GHS8

Model

Trip Point

ID Blower

Pressure

Switch

ID Blower

Pressure

Switch

Part #

Model

Trip Point

ID Blower

Pressure

Switch

ID Blower

Pressure

Switch

Part #

GMS80453A** -0.60 B1370142 GMS80453A** -0.60 B1370142

GMS80703A** -0.60 B1370142 GMS80703A** -0.60 B1370142

GMS80704B** -0.60 B1370142 GMS80704B** -0.47 B1370176

GMS80904B** -0.60 B1370142 GMS80904B** -0.75 B1370179

GMS80905B** -0.70 B1370158 GMS80905B** -0.60 B1370142

GMS8115CB** -0.70 B1370158 GMS8115CB** -0.70 B1370158

GMS81405D** -0.75 13070159 GMS81405D** -0.60 13070142

GHS80453A** -0.60 B1370142 GHS80453A** -0.60 B1370142

GHS80704B** -0.60 B1370142 GHS80704B** -0.47 B1370176

GHS80905C** -0.70 B1370158 GHS80905C** -0.60 B1370142

Square Nose

Pressure Switch Trip Points

And Usage Chart Pressure Switch Trip Points

And Usage Chart

Round Nose

PRODUCT DESIGN GMS8 & GHS8

Part Number B1370190 B1370187 B1370188 B1370198 B1370189

Open Setting (°F) 210 160 170 150 200

GMS80453A** 1 --- --- --- ---

GMS80703A** --- 1 --- --- ---

GMS80704B** --- --- 1 --- ---

GMS80904B** --- --- 1 --- ---

GMS80905B** --- --- --- --- 1

GMS8115CB** --- --- --- 1 ---

GMS81405D** --- --- --- 1 ---

GHS80453A** 1 --- --- --- ---

GHS80704B** --- --- 1 --- ---

GHS80905C** --- --- --- --- 1

T.O.D. PRIMARY LIMIT

Part Number B1370145

Open Setting (°F) 300

GMS80453A** 2

GMS80703A** 2

GMS80704B** 2

GMS80904B** 2

GMS80905B** 2

GMS8115CB** 2

GMS81405D** 2

GHS80453A** 2

GHS80704B** 2

GHS80905C** 2

ROLLOUT LIMIT SWITCHES

Part Number B1370155

Open Setting (°F) 120

GMS80453A** 1

GMS80703A** 1

GMS80704B** 1

GMS80904B** 1

GMS80905B** 1

GMS8115CB** 1

GMS81405D** 1

GHS80453A** 1

GHS80704B** 1

GHS80905C** 1

AUXILIARY LIMIT SWITCHES

PRODUCT DESIGN GDS8

Model Part No. Opens*

GDS80453A** B1370142 -0.60

GDS80703A** B1370142 -0.60

GDS80904B** B1370142 -0.60

GDS81155C** B137158 -0.70

Presssure Switches

Part Number B1370194 0130F00015

Open Setting (°F) 250 280

GDS80453A** 1---

GDS80703A** 1---

GDS80904B** --- 1

GDS81155C** 1 ---

T.O.D. PRIMARY LIMIT

Part Number B1370145

Open Setting (°F) 300

GDS80453A** 2

GDS80703A** 2

GDS80904B** 2

GDS81155C** 2

ROLLOUT LIMIT SWITCHES

Part Number B1370155

Open Setting (°F) 120

GDS80453A** 1

GDS80703A** 1

GDS80904B** 1

GDS81155C** 1

UXILIARY LIMIT SWITCHES

PRODUCT DESIGN

Coil Matches:

AlargearrayofAmana®brand coils are available for use with the GMS8andGHS8furnaces,ineitherupfloworhorizontal

applicationsand for the GDS8fordownflowapplications.Thesecoils are available inbothcasedanduncasedmodels, with

orwithouta TXV expansion device. These80%furnaces match up with theexistingAmana®brand coils as shownbelow.

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.

Product Type

C:IndoorCoil

C A P F 1824 A 6 A

Application

A:Upflow/DownflowCoil

H: Horizontal A Coil

S: Horizontal Slab Coil

Cabinet Finish

U:Uncased

P: Painted

C:UnpaintedCase

Expansion Device

F:Flowrator

Nominal Capacity Range @ 13 SEER

Nominal Width for Gas Furnace

A: Fits14" FurnaceCabinet

B: Fits 17 1/2" Furnace Cabinet

C: Fits21"Furnace Cabinet

D: Fits 24 1/2" Furnace Cabinet

N: Does Not Apply (horizontal slab only)

6: R-22orR-410A

2: R-22

4: R-410A

Refrigerant

Revision

A:Revision

1824: 1 1/2 to 2 Tons

3030: 2 1/2 Tons

3642: 3 to 3 1/2 Tons

4860: 4 to 5 Tons

PRODUCT DESIGN

Thermostats:

ThefollowingAmana®brand thermostats are suggestedfor use with G*S8FurnaceModels:

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 without filterswill void the unit warranty

Upflow Filters

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:

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

RefertoMinimumFilterAreatablestodeterminefilterarearequirement.NOTE:Filterscanalsobeinstalledelsewherein

the duct system such as a central return.

Disposable Minimum Filter Area (in2)

[Based on a 300 ft/min filter face velocity]

*Minimum filter area dictated by heating airflow requirement. *Minimum filter area dictated by heating airflow requirement.

Permanent Minimum Filter Area (in2)

[Based on 600 ft/min filter face velocity]

600 800 1000 1200 1400 1600 2000

0704__XA --- --- 627* 627* 672 768 ---

0905__XA --- --- --- 836* 836* 836* 960

1155__XA --- --- --- 940* 940* 940* 960

600 800 1000 1200 1400 1600 2000

0704__XA --- --- 320* 320* 336 384 ---

0905__XA --- --- --- 427* 427* 427* 480

UPFLOW

COOLING AIRFLOW REQUIREMENT (CFM)

COUNTERFLOW

COOLING AIRFLOW REQUIREMENT (CFM)

Input

Airflow Input__Airflow

600 800 1000 1200 1400 1600 2000

0704__XA --- --- 564* 564* 672 768

0905__XA --- --- --- 752* 752* 768 960

1155__XA --- --- --- 940* 940* 940* 960

600 800 1000 1200 1400 1600 2000

0704__XA --- --- 641* 641* 672 768 ---

0905__XA --- --- --- 854* 854* 854* 960

Input__Airflow

UPFLOW

COOLING AIRFLOW REQUIREMENT (CFM)

COUNTERFLOW

COOLING AIRFLOW REQUIREMENT (CFM)

Input

Airflow

Thermostat Man/Auto Programmable Cool Heat Batt. Powered Batt. Bkup

1213406* Man. Or Auto Yes 2 3 No No

1213407 Man. Changeover Yes 2 2 Yes Yes

1213411 Man. Changeover No 2 2 Yes No

THERMOSTATS

*1213406 is the recommended model for the G*S* furnaces when used with a heat pump in a fossil fuel application.

It is NOT for use with the G*S8 as a sole heating source. 1213406 thermstats are 24V powered with battery

backup.

PRODUCT DESIGN

Counterflow Filters

"A"

Min

Return Air

Optional

Access

Door

Thisfurnacehasprovisionsfortheinstallationofreturnairfiltersatthecounterflowtopreturn. Thefurnacewillaccommodate

thefollowing filter sizes depending on cabinet size:

RefertoMinimumFilterAreatablestodeterminefilterarearequirement. NOTE: Filterscanalsobeinstalledelsewhere

in the duct system such as a central return.

Cabinet Width Filter Area

(in2)Qty Filter Size

(in) Dimension "A"

(in)

21 13.0

24 1/2 11.3

21 18.8

24 1/2 17.7

21 24.3

24 1/2 23.4

15 X 20 X 1

20 X 20 X 1

25 X 20 X 1

600

800

1000

Counterflow Top Return

FURNACE SPECIFICATIONS

1. These furnaces are manufactured for natural gas operation. Optional Kits are available for conversion to propane gas operation.

2. For elevations above 2000 ft. the rating should be reduced by 4% for each 1000 ft. 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 manufactures method in accordance with the

"A.S.H.R.A.E.GUIDE"or "MANUAL J-LOADCALCULATIONS" published bytheAIR CONDITIONING CONTRACTORSOFAMERICA. 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 unit's serial plate for the most up-to-date general and electrical information.

GDS8

(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: May 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.

MODEL GDS80453A** GDS80703A** GDS80904B** GDS81155C**

Btuh Input (US) High Fire 45,000 70,000 90,000 115,000

Output (US) High Fire 36,000 56,000 72,000 92,000

A.F.U.E. 80% 80% 80% 80%

Rated External Static (" w.c.) .20 - .50 .20 - .50 .20 - .50 .20 - .50

Temperature Rise (°F) 25 - 55 25 - 55 30 - 60 40 - 70

High Stage Pressure Switch

Trip Point (" w.c.) -0.60 -0.60 -0.60 -0.70

Blower Wheel (D" x W") 10 X 6 10 x 6 10 x 8 10 x 10

Blower Horsepower 1/3 1/3 1/2 1/2

BlowerSpeeds 4444

Max CFM @ 0.5 E.S.P. 1200 1200 1600 2000

Power Supply 115-60-1 115-60-1 115-60-1 115-60-1

Minimum Circuit Ampacity (MCA)(1) 8.5 8.5 12.9 12.9

Maximum Overcurrent Device(2) 15 15 15 15

Transformer (VA) 40 40 40 40

Heat Anticipator (Amps) 0.7 0.7 0.7 0.7

Primary Limit Setting (°F) 250 250 250 250

Auxiliary Limit Setting (°F) 120 120 120 120

Rollout Limit Setting (°F) 300 300 300 300

Gas Supply Pressure (Natural/Propane) (" w.c.) 7 / 11 7 / 11 7 / 11 7 / 11

Manifold Pressure

(Natural/Propane) High Stage (" w.c.) 3.5 / 10 3.5 / 10 3.5 /10 3.5 /10

Orifice Size (Natural/Propane) #43 / #55 #43 / #55 #43 / #55 #43 / #55

NumberofBurners 2345

Vent Connector Diameter (inches)(3) 4444

Shipping Weight (lbs.) 120 130 153 175

FURNACE SPECIFICATIONS

1. These furnaces are manufactured for natural gas operation. Optional Kits are available for conversion to propane gas operation.

2. For elevations above 2000 ft. the rating should be reduced by 4% for each 1000 ft. 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 manufactures method in accordance with the

"A.S.H.R.A.E.GUIDE"or "MANUAL J-LOADCALCULATIONS" published bytheAIR CONDITIONING CONTRACTORSOFAMERICA. 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 unit's serial plate for the most up-to-date general and electrical information.

GMS8

(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: May 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.

MODEL

GMS80453A**

GMS80703A**

GMS80704B**

GMS80904B**

GMS80905C**

GMS81155C**

GMS81405D**

Btuh Input (US) High Fire 45,000 70,000 70,000 90,000 90,000 115,000 115,000

Output (US) High Fire 36,000 56,000 56,000 72,000 72,000 92,000 92,000

A.F.U.E. 80% 80% 80% 80% 80% 80% 80%

Rated External Static (" w.c.) .20 - .50 .20 - .50 .20 - .50 .20 - .50 .20 - .50 .20 - .50 .20 - .50

Temperature Rise (°F) 20 - 50 20 - 50 20 - 50 30 - 60 30 - 60 40 - 70 40 - 70

High Stage Pressure Switch

Trip Point (" w.c.) -0.60 -0.60 -0.60 -0.60 -0.60 -0.70 -0.70

Blower Wheel (D" x W") 10 X 6 10 x 6 10 x 8 10 x 8 10 x 10 10 x 10 10 x 10

Blower Horsepower 1/3 1/3 1/2 1/2 1/2 1/2 1/2

Blower Speeds 4 4 4 4 4 4 4

Max CFM @ 0.5 E.S.P. 1200 1200 1600 1600 2000 2000 2000

Power Supply 115-60-1 115-60-1 115-60-1 115-60-1 115-60-1 115-60-1 115-60-1

Minimum Circuit Ampacity (MCA)(1) 8.5 8.5 12.9 12.9 12.9 12.9 12.9

Maximum Overcurrent Device(2) 15 15 15 15 15 15 15

Transformer (VA) 40 40 40 40 40 40 40

Heat Anticipator (Amps) 0.7 0.7 0.7 0.7 0.7 0.7 0.7

Primary Limit Setting (°F) 250 250 250 250 250 250 250

Auxiliary Limit Setting (°F) 120 120 120 120 120 120 120

Rollout Limit Setting (°F) 300 300 300 300 300 300 300

Gas Supply Pressure

(Natural/Propane) (" w.c.) 7 / 11 7 / 11 7 / 11 7 / 11 7 / 11 7 / 11 7 / 11

Manifold Pressure

(Natural/Propane) High Stage (" w.c.) 3.5 / 10 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 #43 / #55

Number of Burners 2 3 3 4 4 5 5

Vent Connector Diameter (inches)(3) 4444444

Shipping Weight (lbs.) 120 130 143 153 163 175 175

FURNACE SPECIFICATIONS

1. These furnaces are manufactured for natural gas operation. Optional Kits are available for conversion to propane gas operation.

2. For elevations above 2000 ft. the rating should be reduced by 4% for each 1000 ft. 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 manufactures method in accordance with the

"A.S.H.R.A.E.GUIDE"or "MANUAL J-LOADCALCULATIONS" published bytheAIR CONDITIONING CONTRACTORSOFAMERICA. 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 unit's serial plate for the most up-to-date general and electrical information.

GHS8

(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: May 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.

MODEL GHS80453A** GHS80704B** GHS80905C**

Input, Natural Gas (BTUH) 45,000 70,000 90,000

Output, Natural Gas (BTUH) 36,000 56,000 72,000

Output, LP (BTUH) 32,000 48,000 64,000

A.F.U.E. 80.0% 80.0% 80.0%

Rated External Static (" w.c.) 0.20 - 0.50 0.20 - 0.50 0.20 - 0.50

Temperature Rise (°F) 25 - 55 20 - 50 35 - 65

Pressure Switch Trip Point (" w.c.) -0.60 -0.60 -0.70

Blower Wheel (D" x W") 10x6 10x8 10x10

Blower Horsepower 1/3 1/2 1/2

Blower Speeds 4 4 4

Max CFM @ 0.5 E.S.P. 1200 1600 2000

Power Supply (Volts/Hz/Ph) 115/60/1 115/60/1 115/60/1

Minimum Circuit Ampacity (MCA) (1) 8.1 12.5 12.5

Maximum Overcurrent Device (2) 15 15 15

Transformer (VA) 40 40 40

ID Blower Pressure Switch Trip Point (" w.c.)

Square Nose Blowers -.60 -.60 -.70

ID Blower Pressure Switch Trip Point (" w.c.)

Round Nose Blowers -.60 -.47 -.60

Primary Limit Setting (°F) 210 170 200

Auxiliary Limit Setting (°F) 120 120 120

Rollout Limit Setting (°F) 300 300 300

Gas Supply Pressure (Natural/Propane) (" w.c.) 7 / 11 7 / 11 7 / 11

Manifold Pressure (Natural/Propane) (" w.c.) 3.5 / 10 3.5 / 10 3.5 / 10

Orifice Size (Natural/Propane) 43 / 55 43 / 55 43 / 55

Number of Burners 2 3 4

Vent Connector Diameter (inches)(3) 444

Shipping Weight (lbs.) 120 143 163

BLOWER PERFORMANCE SPECIFICATIONS

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 1555 --- 1511 --- 1459 --- 1392 --- 1344 25 1279 1201 1120

GMS80453AN* MED 2.5 1165 28 1123 30 1100 30 1090 30 1048 32 1017 970 90.3

(MEDIUM) MED-LO 2.0 9273690737889378633885339822800746

LOW 1.5 6994769448668506455163652592566524

HIGH 3.0 1447 36 1310 39 1295 40 1310 39 1273 41 1202 1129 1039

GMS80703AN* MED 2.5 1127 46 1100 47 1095 47 1075 48 1050 49 1018 967 904

(MEDIUM) MED-LO 2.0 895 --- 917 --- 878 --- 867 --- 853 --- 830 786 743

LOW 1.5 694 --- 681 --- 663 --- 640 --- 625 --- 591 562 522

HIGH 4.0 2234 23 2151 24 2076 25 1990 26 1897 27 1803 1710 1569

GMS80704BN* MED 3.5 1676 31 1653 31 1648 31 1581 33 1555 33 1492 1414 1352

(MEDIUM) MED-LO 3.0 1342 38 1335 39 1321 39 1313 39 1291 40 1261 1215 1149

LOW 2.5 1089 47 1085 48 1078 48 1071 48 1057 49 1040 956 932

HIGH 4.0 2182 --- 2127 31 2056 32 1974 33 1895 35 1809 1715 1588

GMS80904BN* MED 3.5 1645 40 1628 40 1615 40 1597 41 1541 43 1491 1440 1350

(MEDIUM) MED-LO 3.0 1320 49 1305 49 1310 49 1310 50 1295 51 1267 1217 1139

LOW 2.5 1063 60 1061 60 1057 61 1056 61 1039 61 1025 1005 948

HIGH 5.0 2334 --- 2334 --- 2284 --- 2135 --- 2051 35 1910 1748 1605

GMS80905CN* MED 4.0 1754 39 1735 39 1728 40 1685 40 1628 42 1551 1469 1346

(MEDIUM) MED-LO 3.5 1367 47 1380 47 1371 47 1374 48 1335 50 1293 1246 1165

LOW 3.0 1098 58 1109 59 1109 59 1088 60 1066 62 1050 998 916

HIGH 5.0 2481 --- 2395 35 2288 37 2217 38 2076 41 1999 1858 1732

GMS81155CN* MED 4.0 1738 49 1732 49 1709 50 1686 50 1639 52 1585 1492 1385

(MEDIUM) MED-LO 3.5 1364 62 1378 62 1372 62 1372 62 1350 63 1313 1261 1125

LOW 3.0 1137 --- 1142 --- 1140 --- 1114 --- 1090 --- 1056 954 860

HIGH 5.0 2554 41 2435 43 2375 44 2240 47 2152 49 2002 1883 1744

GMS81405DN* MED 4.0 1846 57 1773 59 1762 60 1712 61 1672 63 1583 1526 1442

(MEDIUM) MED-LO 3.5 1520 69 1500 70 1483 --- 1470 --- 1435 --- 1373 1308 1245

LOW 3.0 1301 --- 1274 --- 1260 --- 1231 --- 1207 --- 1177 1093 931

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)

()

GMS8

NOTES:

• CFM in chart is without filter(s). Filters do not ship with this furnace, but must be provided by the installer.

• All furnaces ship as hig-speed cooling. Installer must adjust blower cooling speed as needed.

• For most jobs, about 400 CFM per ton when cooling is desirable

• INSTALLATION IS TO BE ADJUSTED TO OBTAIN TEMPERATURE RISE WITHIN THE RANGE SPECIFIED ON THE RATING PLATE.

• The chart is for information only. For satisfactory operation, external static pressure must not exceed values shown on the rating plate. The shaded area insicated

ranges in excess of maximum static pressure allowed when heating.

• The dashed (---) areas indicate a temperature rise not recommended for this model.

• The above chart is for U.S. furnaces installed at 0' - 2,000'. At higher altitudes, a properly de-rated unit will have approximatley the same temperature rise at a

particular CFM, while ESP at the CFM will be lower.

BLOWER PERFORMANCE SPECIFICATIONS GHS8