Goodman Gms8 User manual

RT6622014r3

November2013

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 performed by an unqualified

person.

•RefertoServiceManualRS6612006fortroubleshootinginformation.

•All safetyinformation must befollowed as providedin the ServiceManual.

•Refertothe appropriate Parts Catalogforpart number information.

•Model numbers listed on page 3.

GMS8 33-3/8" 80% Gas Furnace Units

80% AFUE, Single Stage,

Multi-Speed, Upflow Horizontal

TECHNICAL MANUTECHNICAL MANU

TECHNICAL MANUALAL

ALAL

CUS

PRODUCT IDENTIFICATION

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

Pleaseuse these numberswhenrequesting service orpartsinformation.

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

GMS 8 040 3AXAA

SUPPLY TYPE

M: Upflow/Horizontal

FURNACE TYPE

S: Single-Stage/

Multi-Speed

AFUE

8: 80%

A* Revisions

NOMINAL INPUT

040: 45,000 Btuh

060: 70,000 Btuh

080: 90,000 Btuh

100: 115,000 Btuh

120: 140,000 Btuh

AIRFLOW

APABILITY

3: 1200

4: 1600

5: 2000

CABINET

WIDTH

A: 14"

B: 17-1/2"

C: 21"

D: 24-1/2"

ADDITIONAL

FEATURES

N: Natural Gas

X: Low NOx

PRODUCT

TYPE:

G: Goodman MAJOR REVISION

A: Initial Release

MINOR REVISION

A: Initial Release

B* Revisions

NOMINAL INPUT

040: 40,000 Btuh

060: 60,000 Btuh

080: 80,000 Btuh

100: 100,000 Btuh

120: 120,000 Btuh

PRODUCT IDENTIFICATION

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

Pleaseuse these numberswhenrequesting service orpartsinformation.

GMS80403A*A*

GMS80603A*A*

GMS80604B*A*

GMS80804B*A*

GMS80805C*A*

GMS81005C*A*

GMS81205D*A

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

Do not connect or use any device

thatisnotdesigncertifiedbyGood-

man for use with this unit. Serious

property damage, personal injury, reduced unit perfor-

mance 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

*Thesemodels available inNaturalGas and LowNOx.

GMS80403A*B*

GMS80603A*B*

GMS80604B*B*

GMS80804B*B*

GMS80805C*B*

GMS81005C*B*

GMS81205D*B*

PRODUCT DESIGN

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

nacesmustbeventedinaccordancewiththeNationalStan-

dardof Canada, CAN/CSAB149.1and CAN/CSA B149.2-

latesteditions and amendments.

NOTE: Thevertical height of theCategory I venting system

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

103 6 1 1

* 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 accessibilityclearance shalltake prece-

denceoverclearancesfromtheenclosurewhereaccessibil-

ityclearancesaregreater. Alldimensionsaregivenininches.

HighAltitudeDerate

IMPORTANT NOTE: The furnace as shipped requires no

change to run between 0 - 4500 feet. Do not attempt to

increase the firing rate by changing orifices or increasing

themanifoldpressurebelow4500feet.Thiscan cause poor

combustionand equipment failure.

Highaltitudeinstallationsabove 4500 feetmayrequireboth

a pressure switch and an orifice change. These changes

are necessary to compensate for the natural reduction in

the density of both the gas fuel and the combustion air at

higheraltitude.

For installations above 4500 feet, please refer to your dis-

tributorfor required kit(s).Contactthe distributor fora tabu-

lar listing of appropriate manufacturer’s kits for propane

gasand/orhighaltitudeinstallations.Theindicatedkitsmust

be used to insure safe and proper furnace operation. All

conversions must be performed by a qualified installer, or

service agency.

GeneralOperation

TheGMS8furnacesareequippedwithanelectronicignition

deviceusedtolightthe burners and aninduceddraftblower

to exhaust combustion products.

An interlock switch prevents furnace operation if the inner

blowerdoor is notin place.Keep the bloweraccess door in

placeexcept for inspectionand maintenance. (Seeillustra-

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

notoperatingproperly,thecontrolmoduleLED will flashon

and off in a factory-programmed sequence, depending on

theproblem encountered. Thislight can beviewedthrough

theobservation window in theblower access door. Referto

theTroubleshootingChart forfurtherexplanationoftheLED

codesand Abnormal Operation -IntegratedIgnitionControl

section in the Service Instructions for an explanation of the

possibleproblem.

Theratedheating capacity ofthefurnace should begreater

thanor equal tothe totalheat loss ofthe area tobe heated.

The total heat loss should be calculated by an approved

methodorin accordance with“ASHRAEGuide” or “Manual

J-LoadCalculations”publishedbytheAirConditioningCon-

tractors of America.

*Obtain from: American National Standards Institute 1430

BroadwayNewYork, NY 10018

LocationConsiderations

• The furnace should be as centralized as is practical

with respect to the air distribution system.

• Donotinstall the furnacedirectlyoncarpeting, tile, or

combustiblematerialother than woodflooring.

• When installed in a residential garage, the furnace

mustbepositionedsotheburnersandignitionsource

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 isventing at anon-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: Singlestagegas furnaces withinduceddraft

blowers draw products of combustion through a heat ex-

changerallowing, in someinstances,common venting with

naturaldraftappliances (i.e. waterheaters).Allinstallations

mustbeventedin accordance withNationalFuelGasCode

COMPONENT IDENTIFICATION

Upflow/Horizontal

1 TubularHeatExchanger

2 PressureSwitch

3 FluePipeConnection

4 InducedDraftBlower

5 GasLine Entrance

6 GasValve

7 RolloutLimit

8 JunctionBox

Pressure Switch

Tubular Heat Exchanger

Flue Pipe Connection

Gas Line Entrance

(Alternate)

Induced Draft Blower

Gas Line

Entrance

Gas Valve

Rollout Limit

Junction Box

Wiring Harness

Grommet

Gas Manifold

Inshot Burner

Blower Door

Interlock Switch

Integrated Control Module

Transformer Circulator Blower

9 WiringHarnessGrommet

10 GasManifold

11 InshotBurner

12 Transformer

13 IntegratedControlModule

14 Blower DoorInterlockSwtich

15 CirculatorBlower

16 Gas LineEntrance(Alternate)

Note: Primary Limit Not Shown

PRODUCT DIMENSIONS

GMS8

lt. Gas Inlet

High Voltage Inlet

Low Voltage

lt. Gas Inlet

lt. High Voltage

Alt. LowVoltage

MODEL A B

GMS80403A***

GMS80603A***

GMS80604B***

GMS80804B***

GMS80805C***

GMS81005C***

GMS81205D*** 24 - 1/2 23

21 19 - 1/2

14 12 - 1/2

17 - 1/2 16

PRODUCT DESIGN

For installations in Canada, the GMS furnaces are certifed only to 4,500 ft.

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

GMS8***A*

Model

Trip Point

ID Blower

Pressure

Switch

ID Blower

Pressure

Switch

Part #

GMS80403A*A* -0.70 B1370158

GMS80603A*A* -0.70 B1370158

GMS80604B*A* -0.75 B1370179

GMS80804B*A* -0.75 B1370179

GMS80805C*A* -0.75 B1370179

GMS81005C*A* -0.90 0130F00041

GMS81205D*A* -0.80 0130F00042

Pressure Switch Trip Points

Part Number 0130F00035 20162906 20162903 0130F00036

Open Setting (°F) 220 170 160 180

GMS80403A*A* 1 --- --- ---

GMS80603A*A* --- 1 --- ---

GMS80604B*A* --- 1 --- ---

GMS80804B*A* --- --- 1 ---

GMS80805C*A* --- 1 --- ---

GMS81005C*A* --- --- --- 1

GMS81205D*A* --- --- 1 ---

PRIMARY LIMIT

Part Number 10123529

Open Setting (°F) 300

GMS80403A*** 2

GMS80603A*** 2

GMS80604B*** 2

GMS80804B*** 2

GMS80805C*** 2

GMS81005C*** 2

GMS81205D*** 2

ROLLOUT LIMIT SWITCHES Part Number 0130F00038

Open Setting (°F) 120

GMS80403A*** 1

GMS80603A*** 1

GMS80604B*** 1

GMS80804B*** 1

GMS80805C*** 1

GMS81005C*** 1

GMS81205D*** 1

AUXILIARY LIMIT SWITCHES

PRODUCT DIMENSIONS

GMS8***B*

Model

Trip Point

ID Blower

Pressure

Switch

ID Blower

Pressure

Switch

Part #

GMS80403A*B* -0.80 0130F00042

GMS80603A*B* -0.80 0130F00042

GMS80604B*B* -0.90 0130F00041

GMS80804B*B* -0.80 0130F00042

GMS80805C*B* -0.80 0130F00042

GMS81005C*B* -0.80 0130F00042

GMS81205D*B* -0.80 0130F00042

Pressure Switch Trip Points

Part Number 20162901 20162904 20162903

Open Setting (°F) 210 150 160

GMS80403A*B* 1------

GMS80603A*B* --- 1 ---

GMS80604B*B* --- 1 ---

GMS80804B*B* --- 1 ---

GMS80805C*B* --- --- 1

GMS81005C*B* --- 1 ---

GMS81205D*B* --- --- 1

PRIMARY LIMIT

Part Number 10123529

Open Setting (°F) 300

GMS80403A*** 2

GMS80603A*** 2

GMS80604B*** 2

GMS80804B*** 2

GMS80805C*** 2

GMS81005C*** 2

GMS81205D*** 2

ROLLOUT LIMIT SWITCHES Part Number 0130F00038

Open Setting (°F) 120

GMS80403A*** 1

GMS80603A*** 1

GMS80604B*** 1

GMS80804B*** 1

GMS80805C*** 1

GMS81005C*** 1

GMS81205D*** 1

AUXILIARY LIMIT SWITCHES

For installations in Canada, the GMS furnaces are certifed only to 4,500 ft.

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

PRODUCT DESIGN

Coil Matches:

A large array of Amana®brand coils are available for use with the GMS8 furnaces, in either upflow or horizontal applica-

tions.Thesecoilsareavailableinbothcasedanduncasedmodels (with the option of field installedTXVexpansiondevice).

These 80% furnaces match up with the existing Amana®brand coils as shown below.

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.

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: Flowrater

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

4860: 4 & 5 Tons

REVISION

A: Revision

NOMINAL WIDTH FOR GAS FURNACE

A:Fits14" FurnaceCabinet

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

PRODUCT DESIGN

Thermostats:

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 thisfurnacewithout filters willvoid the unitwarranty

Upflow Filters

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

0604__XA --- --- 564* 564* 672 768

0605__XA --- --- --- 752* 752* 768 960

1005__XA --- --- --- 940* 940* 940* 960

600 800 1000 1200 1400 1600 2000

0604__XA --- --- 641* 641* 672 768 ---

0805__XA --- --- --- 854* 854* 854* 960

Input__Airflow

UPFLOW

COOLING AIRFLOWREQUIREMENT (CFM)

COUNTERFLOW

COOLING AIRFLOWREQUIREMENT (CFM)

Input

Airflow

600 800 1000 1200 1400 1600 2000

0604__XA --- --- 627* 627* 672 768 ---

0805__XA --- --- --- 836* 836* 836* 960

1005__XA --- --- --- 940* 940* 940* 960

600 800 1000 1200 1400 1600 2000

0604__XA --- --- 320* 320* 336 384 ---

0805__XA --- --- --- 427* 427* 427* 480

UPFLOW

COOLING AIRFLOW REQUIREMENT (CFM)

COUNTERFLOW

COOLING AIRFLOW REQUIREMENT (CFM)

Input

Airflow Input__Airflow

It is recommended that a single-stage heat, non-power robbing thermostat be used. Refer to the product marketing

literaturefor a completelist of thermostatsoffered.

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-LOAD CALCULATIONS"published bytheAIR CONDITIONINGCONTRACTORSOF 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 unit's serial plate for the most up-to-date general and electrical information.

GMS8***A*

(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

GMS80403A*A*

GMS80603A*A*

GMS80604B*A*

GMS80804B*A*

GMS80805C*A*

GMS81005C*A*

GMS81205D*A*

Btuh Input (US) HighFire 45,000 70,000 70,000 90,000 90,000 115,000 140,000

Output (US) High Fire 36,000 56,000 56,000 72,000 72,000 92,000 112,000

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) 25 - 55 25 -55 20 - 50 35 - 65 35 - 65 35 - 65 40 - 70

High Stage Pressure Switch

Trip Point (" w.c.) -0.70 -0.70 -0.75 -0.75 -0.75 -0.90 -0.80

Blower Wheel (D" x W") 10 X 6 10 x 6 10 x 8 10X8 10x10 10X10 11x10

Blower Horsepower 1/3 1/3 1/2 1/2 1/2 1/2 3/4

Blower Speeds 4 4 4 4 4 4 4

Max CFM @ 0.5E.S.P. 1298 1157 1883 1725 1960 1974 2131

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 15.2

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) 220° 170° 170° 160° 170° 180° 160°

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 6

Vent Connector Diameter (inches)(3) 4444444

Shipping Weight (lbs.) 120 130 143 153 163 170 183

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-LOAD CALCULATIONS"published bytheAIR CONDITIONINGCONTRACTORSOF 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 unit's 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: 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.

GMS8***B*

MODEL

GMS80403A*B*

GMS80603A*B*

GMS80604B*B*

GMS80804B*B*

GMS80805C*B*

GMS81005C*B*

GMS81205D*B*

Btuh Input (US) HighFire 40,000 60,000 60,000 80,000 80,000 100,000 120,000

Output (US) High Fire 32,000 48,000 48,000 64,000 64,000 80,000 96,000

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) 25 - 55 25 -55 20 - 50 35 - 65 35 - 65 35 - 65 40 - 70

High Stage Pressure Switch

Trip Point (" w.c.) -0.80 -0.80 -0.90 -0.80 -0.80 -0.80 -0.80

Blower Wheel (D" x W") 10 X 6 10 x 6 10 x 8 10X8 10x10 10X10 11x10

Blower Horsepower 1/3 1/3 1/2 1/2 1/2 1/2 3/4

Blower Speeds 4 4 4 4 4 4 4

Max CFM @ 0.5E.S.P. 1298 1157 1883 1725 1960 1974 2131

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 15.2

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) 210° 150° 150° 150° 160° 150° 160°

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) #45 / #55 #45 / #55 #45 / #55 #45 / #55 #45 / #55 #45 / #55 #45 / #55

Number of Burners 2 3 3 4 4 5 6

Vent Connector Diameter (inches)(3) 4444444

Shipping Weight (lbs.) 120 130 143 153 163 170 183

BLOWER PERFORMANCE SPECIFICATIONS

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.

GMS8***A*

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 152122146623141424137324129826124311641075

*MS80403A*A* MED 2.5 1160291160291132291121301082311042997925

(MEDIUM) MED-LO 2.0 961 35 955 35 948 35 932 36 913 37 882 821 803

LOW 1.5 781 43 785 42 781 43 773 43 761 44 745 716 668

HIGH 3.0 14223613523813074011974311574510921075983

*MS80603A*A* MED 2.5 1098 47 1081 48 1051 49 1039 50 1021 51 983 924 868

(MEDIUM) MED-LO 2.0 919 56 913 57 892 58 847 ---- 829 ---- 818 792 728

LOW 1.5 758 ---- 741 ---- 741 ---- 733 ---- 699 ---- 677 649 626

HIGH 4.0 2134----210025204225197526188328178617001601

*MS80604B*A* MED 3.5 166831166331165631164532161632154914921391

(MEDIUM) MED-LO 3.0 141937142636142636143236141937137813281261

LOW 2.5 1134 46 1145 45 1166 44 1171 44 1160 45 1144 1111 1071

HIGH 4.0 2051 ---- 1983 ---- 1895 35 1812 37 1725 39 1627 1530 1439

*MS80804B*A* MED 3.5 173638170839165240161141154043147513941307

(MEDIUM) MED-LO 3.0 149345166840145946142947138948133912741204

LOW 2.5 1200 56 1185 56 1180 56 1173 57 1158 58 1125 1125 1080

HIGH 5.0 2290 ---- 2229 ---- 2155 ---- 2047 ---- 1960 ---- 1837 1712 1584

*MS80805C*A* MED 4.0 185236182037177738171939164141156714691382

(MEDIUM) MED-LO 3.5 161541159242155643151644147045140513461235

LOW 3.0 1290 52 1285 52 1265 53 1235 54 1214 55 1174 1044 904

HIGH 5.0 232337222538212040204042197443180116881577

*MS81005C*A* MED 4.0 185846184746179947174449167451157714931399

(MEDIUM) MED-LO 3.5 159653158754157154155255149357139713261217

LOW 3.0 1291 ---- 1272 ---- 1261 ---- 1257 ---- 1205 ---- 1168 1118 1060

HIGH 5.0 246942238943230045222347213149202719021786

*MS81205D*A* MED 4.0 157566155867154567151369150069141913541271

(MEDIUM) MED-LO 3.5 1402 ---- 1380 ---- 1343 ---- 1319 ---- 1296 ---- 1245 1183 1106

LOW 3.0 1200 ---- 1186 ---- 1161 ---- 1127 ---- 1082 ---- 1042 995 926

(CFM & Temperature Rise vs. External Static Pressure)

0.10.20.30.40.5

Model

Heating Speed

As Shipped

Motor

Speed

EXTERNAL STATIC PRESSURE (Inches Water Column)

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 1521 ---- 1466 ---- 1414 ---- 1373 ---- 1298 ---- 1243 1164 1075

*MS80403A*B* MED 2.5 1160261160261132261121261082271042997925

(MEDIUM) MED-LO 2.0 961 31 955 31 948 31 932 32 913 33 882 821 803

LOW 1.5 781 38 785 38 781 38 773 38 761 32 745 716 668

HIGH 3.0 14223113523313073411973711573810921075983

*MS80603A*B* MED 2.5 1098 40 1081 41 1051 42 1039 43 1021 44 983 924 868

(MEDIUM) MED-LO 2.0 919 48 913 49 892 50 847 ---- 829 ---- 818 792 728

LOW 1.5 758 ---- 741 ---- 741 ---- 733 ---- 699 ---- 677 649 626

HIGH 4.0 213421210021204222197523188324178617001601

*MS80604B*B* MED 3.5 166827166327165627164527161628154914921391

(MEDIUM) MED-LO 3.0 141931142631142631143231141931137813281261

LOW 2.5 1134 39 1145 39 1166 38 1171 38 1160 38 1144 1111 1071

HIGH 4.0 2051 ---- 1983 ---- 1895 ---- 1812 ---- 1725 ---- 1627 1530 1439

*MS80804B*B* MED 3.5 1736----170835165236161137154038147513941307

(MEDIUM) MED-LO 3.0 169335166836145941142941138943133912741204

LOW 2.5 1200 49 1185 50 1180 50 1173 51 1158 51 1125 1125 1080

HIGH 5.0 2290 ---- 2229 ---- 2155 ---- 2047 ---- 1960 ---- 1837 1712 1584

*MS80805C*B* MED 4.0 1852 ---- 1820 ---- 1777 ---- 1719 --- 1641 36 1567 1469 1382

(MEDIUM) MED-LO 3.5 161537159237155638151639147040140513461235

LOW 3.0 1290 46 1285 46 1265 47 1235 48 1214 49 1174 1044 904

HIGH 5.0 2323 ---- 2225 ---- 2120 35 2040 36 1974 38 1801 1688 1577

*MS81005C*B* MED 4.0 185840184740179941174442167444157714931399

(MEDIUM) MED-LO 3.5 159646158747157147155248149350139713261217

LOW 3.0 1291 57 1272 58 1261 59 1257 59 1205 61 1168 1118 1060

HIGH 5.0 2469 ---- 2389 ---- 2300 ---- 2223 40 2131 42 2027 1902 1786

*MS81205D*B* MED 4.0 157556155857154558151359150059141913541271

(MEDIUM) MED-LO 3.5 140263138064134366131967129669124511831106