Amana Amh8 33-3/8" User manual

CUS

RT6621023r3

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 or services performed by an unqualified person.

is a registered trademark of Maytag Corporation or its related companies

•RefertoServiceManualRS6612007fortroubleshootinginformation.

•Allsafety information must befollowed as provided inthe Service Manual.

•Refertotheappropriate Parts Catalog forpartnumberinformation.

•Model numbers listed on page 3.

AMH8 33-3/8" 80% Gas Furnace

80% AFUE, Twin Comfort™,

Multi-Speed, Upflow/Horizontal

TECHNICAL MANUTECHNICAL MANU

TECHNICAL MANUALAL

ALAL

PRODUCT IDENTIFICATION

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

Pleaseusethese numbers whenrequestingservice or parts information.

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 require-

ments of an "entry level technician", at a minimum, as

specifiedbytheAir-Conditioning,Heating,andRefrigera-

tion Institute (AHRI). Attempting to install or 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

AMH8 040 3AXAA

SUPPLY TYPE:

M: Upflow/Horizontal

FURNACETYPE:

H: Twin ComfortTM

Multi-Speed

FUE:

: 80%

PRODUCT

TYPE:

A: Amana®

Brand

A* Revisions

NOMINAL CAPACITY

040: 45,000 BTUH

060: 70,000 BTUH

080: 90,000 BTUH

100: 115,000 BTUH

120: 140,000 BTUH

AIRFLOW

CAPABILITY:

3: 1200

4: 1600

5: 2000

CABINET WIDTH:

A: 14" C: 21"

B: 171/2" D: 24 1/2"

ADDITIONAL

FEATURES:

N: Natural Gas

X: LowNOx

AJOR REVISION:

: Initial Releas

MINOR REVISION:

A: Initial Release

B* Revisions

NOMINAL CAPACITY

040: 40,000 BTUH

060: 60,000 BTUH

080: 80,000 BTUH

100: 100,000BTUH

120: 120

000BTUH

PRODUCT IDENTIFICATION

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

Pleaseusethese numbers whenrequestingservice or parts information.

AMH80403A*A*

AMH80603A*A*

AMH80604B*A*

AMH80803B*A*

AMH80804B*A*

AMH80805C*A*

AMH81005C*A*

AMH81205D*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

*Models are available in Natural Gas and low NOx.

AMH80403A*B*

AMH80603A*B*

AMH80604B*B*

AMH80803B*B*

AMH80804B*B*

AMH80805C*B*

AMH81005C*B*

AMH81205D*B*

PRODUCT DESIGN

WARNING

TO PREVENT POSSIBLE PERSONAL INJURY OR DEATH DUE TO ASPHYXIATION,

THIS FURNACE MUST BE CATEGORY IVENTED. DO NOT VENT USING

CATEGORY III VENTING.

1. CategoryIVentingisventingatanon-positivepressure.

A furnace vented as Category I is considered a fan-as-

sisted appliance and the vent system does not have to

be “gas tight.” NOTE: Single stage gas furnaces with

induced draft blowers draw products of combustion

through a heat exchanger allowing, in some instances,

commonventingwithnaturaldraftappliances(i.e.water

heaters).Allinstallations must be ventedinaccordance

with National Fuel Gas Code NFPA 54/ANSI Z223.1 -

latestedition.InCanada,thefurnacesmustbevented in

accordancewiththe National StandardofCanada,CAN/

CSAB149.1and CAN/CSA B149.2 - latesteditionsand

amendments.

NOTE: Theverticalheight of theCategoryIventing system

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

ventingsystem.

2. Linevoltagewiring can enter through therightorleftside

ofthefurnace.Low voltage wiring canenterthroughthe

rightor left sideof furnace.

3. Conversionkitsforpropane gas andhighaltitudenatural

andpropanegas operation are available.SeeHighAlti-

tudeDerate chart fordetails.

GeneralOperation

TheAMH8furnacesareequippedwithanelectronicignition

deviceusedtolighttheburnersandan induced draft blower

to exhaust combustion products.

Aninterlockswitch prevents furnaceoperationifthe blower

door is not in place. Keep the blower access door in place

exceptfor inspection and maintenance.

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. This lightcan be viewed through

theobservationwindow in thebloweraccessdoor. Refer to

theTroubleshootingChart for further explanation of theLED

codesandAbnormal Operation - Integrated Ignition Control

section in the Service Instructions for an explanation of the

possibleproblem.

Theratedheating capacity of thefurnaceshouldbe greater

thanor equal tothe total heatloss of thearea to beheated.

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.

• Donotinstallthe furnace directly oncarpeting,tile,or

combustiblematerialother than wood flooring.

• When suspending the furnace from rafters or joists,

use 3/8" threaded rod and 2” x 2” x 3/8” angle as

showninthe Installation andServiceInstructions.The

length of the rod will depend on the application and

clearancenecessary.

• 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.

PRODUCT DESIGN

Accessibility Clearances (Minimum)

Unobstructed front clearance of 24" for servicing is rec-

ommended.

SW B

1036 11

* 24" clearance 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: Inallcases accessibility clearanceshalltake prece-

dence over clearances from the enclosure where accessi-

bility clearances are greater. All dimensions are given in

inches.

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.Thiscancausepoor

combustionand equipment failure.

Highaltitudeinstallationsabove4500 feet may require both

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-

tributorforrequiredkit(s).Contactthedistributorforatabular

listing of appropriate manufacturer’s kits for propane gas

and/orhighaltitude installations. The indicatedkitsmustbe

used to insure safe and proper furnace operation. All con-

versions must be performed by a qualified installer, or ser-

vice agency.

COMPONENT IDENTIFICATION

Upflow/Horizontal

1 TubularHeatExchanger

2 PressureSwitch

3 FluePipeConnection

4 InducedDraftBlower

5 GasLineEntrance

6 GasValve

7 RolloutLimit

8 JunctionBox

9 WiringHarnessGrommet

10 GasManifold

11 InshotBurner

12 Transformer

13 IntegratedControlModule

14 Blower DoorInterlockSwtich

15 CirculatorBlower

16 Gas LineEntrance(Alternate)

Note: Primary Limit Not Shown

躀

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

PRODUCT DIMENSIONS

AMH8

lt. Gas Inlet

High Voltage Inlet

Low Voltage

lt. Gas Inlet

lt. High Voltage

Alt. LowVoltage

MODELS A B

AMH80403A***

AMH80603A*** 14 12-1/2

AMH80604B***

AMH80803B***

AMH80804B*** 17-1/2 16

AMH80805C***

AMH81005C*** 21 19-1/2

AMH81205D*** 24-1/2 23

All dimensions are in inches.

PRODUCT DESIGN

For installaions in Canada, the AMH8 furnace is certified only to 4,500 ft.

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

MODEL

TRIP POINT

ID BLOWER

PRESSURE

SWITCH

ID BLOWER

PRESSURE

SWITCH

PART #

AMH80403A*A* -0.70 B1370158

AMH80603A*A* -0.70 B1370158

AMH80604B*A* -0.75 B1370179

AMH80803B*A* -0.75 B1370179

AMH80804B*A* -0.75 B1370179

AMH80805C*A* -0.75 B1370179

AMH81005C*A* -0.90 1030F00041

AMH81205D*A* -0.80 0130F00042

PRESSURE SWITCH TRIP POINTS

AND USAGE CHART

Part Number 0130F00035 20162906 20162903 0130F00036

Open Setting (°F) 220 170 160 180

AMH80403A*A* 1---------

AMH80603A*A* --- 1 --- ---

AMH80604B*A* --- 1 --- ---

AMH80803B*A* --- 1 --- ---

AMH80804B*A* --- --- 1 ---

AMH80805C*A* --- 1 --- ---

AMH81005C*A* --- --- --- 1

AMH81205D*A* --- --- 1 ---

PRIMARY LIMIT

Part Number 10123529

Open Setting (°F) 300

AMH80403A*** 2

AMH80603A*** 2

AMH80604B*** 2

AMH80803B*** 2

AMH80804B*** 2

AMH80805C*** 2

AMH81005C*** 2

AMH81205D*** 2

ROLLOUT LIMIT SWITCHES

Part Number 0130F00038

Open Setting (°F) 120

AMH80403A*** 1

AMH80603A*** 1

AMH80604B*** 1

AMH80803B*** 1

AMH80804B*** 1

AMH80805C*** 1

AMH81005C*** 1

AMH81205D*** 1

AUXILIARY LIMIT SWITCHES

AMH8***A*

PRODUCT DESIGN

MODEL

TRIP POINT

ID BLOWER

PRESSURE

SWITCH

ID BLOWER

PRESSURE

SWITCH

PART #

AMH80403A*B* -0.80 0130F00042

AMH80603A*B* -0.80 0130F00042

AMH80604B*B* -0.90 0130F00041

AMH80803B*B* -0.80 0130F00042

AMH80804B*B* -0.80 0130F00042

AMH80805C*B* -0.80 0130F00042

AMH81005C*B* -0.80 0130F00042

AMH81205D*B* -0.80 0130F00042

PRESSURE SWITCH TRIP POINTS

AND USAGE CHART

Part Number 20162904 20162903 20162901

Open Setting (°F) 150 160 210

AMH80403A*B* --- --- 1

AMH80603A*B* 1 --- ---

AMH80604B*B* 1 --- ---

AMH80803B*B* 1 --- ---

AMH80804B*B* 1------

AMH80805C*B* --- 1 ---

AMH81005C*B* 1------

AMH81205D*B* --- 1 ---

PRIMARY LIMIT

Part Number 10123529

Open Setting (°F) 300

AMH80403A*** 2

AMH80603A*** 2

AMH80604B*** 2

AMH80803B*** 2

AMH80804B*** 2

AMH80805C*** 2

AMH81005C*** 2

AMH81205D*** 2

ROLLOUT LIMIT SWITCHES

Part Number 0130F00038

Open Setting (°F) 120

AMH80403A*** 1

AMH80603A*** 1

AMH80604B*** 1

AMH80803B*** 1

AMH80804B*** 1

AMH80805C*** 1

AMH81005C*** 1

AMH81205D*** 1

AUXILIARY LIMIT SWITCHES

For installaions in Canada, the AMH8 furnace is certified only to 4,500 ft.

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

AMH8***B*

PRODUCT DESIGN

Coil Matches:

A large array of Amana®brand coils are available for use with the AMH8 furnaces, in either upflow or horizontal applica-

tions. These coils are available in both cased and uncased models (with the option of a field installed TXV expansion

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

• 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.

Coil Matches (Amana®brand units using R22 and R-410A):

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

NOMINALWIDTH 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 Slab Coils)

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:

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

literaturefor a completelist of thermostats offered.

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 furnacewithout filters will voidthe unit warranty.

RefertoMinimumFilterAreatablestodeterminefilterarearequirement.NOTE:Filterscanalsobeinstalledelsewherein

the duct system such as a central return.

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 14 12 x 25 x 1 300

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

Side Return(s) Bottom Return

FURNACE INPUT FILTER SIZE

40M 320 in2

60M 483 in2

80M 640 in2

100M 800 in2

120M 738 in2

DISPOSABLE NOMINAL 300 F.M. FACE VELOCITY

MINIMUM FILTER SIZES for DISPOSABLE FILTERS

PRODUCT DESIGN

TwinComfort™ Configuration & Operation

SECOND

STAGE

ONLY

SECOND

DELAY

SECOND

DELAY

1-STAGE

2-STAGE

HEAT OFF

DELAY

MODE

AUTO

Switches for White-Rodgers board shown above

With other venders, order of switches may vary

but functionality stays the same.

TwinComfort™

This furnace is capable of the following heating modes:

To change from the factor single-stage operation, adjust the

dipswitches on the ignition control as follows:

Note: This furnace is designed to be used

with a single-stage thermostat.

•

Modified Two-Stage

Fixed 5-Min. Low Stage

Auto Time (1-12 Min.) Low Stage

•

Single Stage (Factory Setting)

T-Stat Satisfied T-Stat Satisfied

GasValve Switch

to 2nd Stage Gas Valve Switch

to 2nd Stage

Blower Switch to

Hi Heat Operation Blower Switch to

Hi Heat Operation

Low-Heat Blower Low-Heat Blower

DelayTime (5 Min) DelayTime (1-12 Min)

Safety Circuit Check Safety Circuit Check

Start Furnace

in Low Stage Start Furnace

inLow Stage

Start Start

Call for Heat Call for Heat

FURNACE SPECIFICATIONS

NOTES:

1. 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.

2. 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 "MANUALJ-LOADCALCULATIONS"publishedby theAIRCONDITIONINGCONTRACTORSOF AMERICA.Thetotal

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.

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

2. Minimum Circuit Ampacity calculated as: (1.25 x Circulator Blower Amps) + I.D. Blower Amps. Wire sizes should be determined in accordance

with National Electrical Codes.Extensive wire runs will require larger wire sizes.

3 Maximum Overcurrent protections Device refers to maximum recommended fuse or circult breaker size. May use time delay fuses or HACR-

type circuit breakers of the same sizes as noted.

*Off Heating - This fan delay timing is adjustable (90, 120, 150 or 180 seconds). 150 seconds as shipped.

AMH8***A*

MODEL

AMH80403A*A*

AMH80603A*A*

AMH80604B*A*

AMH80803B*A*

AMH80804B*A*

AMH80805C*A*

AMH81005C*A*

AMH81205D*A*

Input, Natural Gas (BTUH) 45,000 70,000 70,000 90,000 90,000 90,000 115,000 140,000

Output, Natural Gas (BTUH) 136,000 56,000 56,000 72,000 72,000 72,000 92,000 112,000

Output, LP (BTUH) 32,000 48,000 48,000 64,000 64,000 64,000 80,000 96,000

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

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

Temperature Rise (°F) 25 - 55 25 -55 20 - 50 35 - 65 35 - 65 35 - 65 35 - 65 40 -70

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

Blower Wheel (D" x W") 10x6 10x6 10x8 10x8 10x8 10x10 10x10 11x10

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

Blower Speeds 4 4 4 4 4 4 4 4

Max CFM @ 0.5 E.S.P. 1298 1157 1883 1448 1725 1960 1974 2131

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

Minimum Circuit Ampacity (MCA) 28.1 8.1 12.5 8.1 12.5 12.5 12.5 14.7

Maximum Overcurrent Device 315 15 15 15 15 15 15 15

Transformer (VA) 40 40 40 40 40 40 40 40

Primary Limit Setting (°F) 220 170 170 170 160 170 180 160

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

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

Fan Delay On Heating 30 30 30 30 30 30 30 30

Off Heating * 150 150 150 150 150 150 150 150

Fan Delay On Cooling 6 6 6 6 6 6 6 6

Off Cooling 45 45 45 45 45 45 45 45

FanDelayOn-FanOnly 00000000

upp

ressure

(

Natural/Pro

ane

)

(

" w.c.

)

7 / 11 7 / 11 7 / 11 7 / 11 7 / 11 7 / 11 7 / 11 7 / 11

Manifold Pressure

(

Natural/Pro

ane

)

(

" w.c.

)

3.5 / 10 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 43 / 55

Number of Burners 2 3 3 4 4 4 5 6

Vent Connector Diameter (inches) 4 4 4 4 4 4 4 4

FURNACE SPECIFICATIONS

NOTES:

1. 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"MANUALJ-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.

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

2. Minimum Circuit Ampacity calculated as: (1.25 x Circulator Blower Amps) + I.D. Blower Amps. Wire sizes should be determined in accordance

with National Electrical Codes.Extensive wire runs will require larger wire sizes.

3 Maximum Overcurrent protections Device refers to maximum recommended fuse or circult breaker size. May use time delay fuses or HACR-

type circuit breakers of the same sizes as noted.

*Off Heating - This fan delay timing is adjustable (90, 120, 150 or 180 seconds). 150 seconds as shipped.

AMH8***B*

MODEL

AMH80403A*B*

AMH80603A*B*

AMH80604B*B*

AMH80803B*B*

AMH80804B*B*

AMH80805C*B*

AMH81005C*B*

AMH81205D*B*

Input, Natural Gas (BTUH) 40,000 60,000 60,000 80,000 80,000 80,000 100,000 120,000

Output, Natural Gas (BTUH) 132,000 48,000 48,000 64,000 64,000 64,000 80,000 96,000

Output, LP (BTUH) 32,000 48,000 48,000 64,000 64,000 64,000 80,000 96,000

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

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

Temperature Rise (°F) 25 - 55 20 - 50 20 - 50 35 - 65 35 - 65 35 - 65 35 - 65 40 - 70

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

Blower Wheel (D" x W") 10x6 10x6 10x8 10x8 10x8 10x10 10x10 11x10

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

Blower Speeds 4 4 4 4 4 4 4 4

Max CFM @ 0.5 E.S.P. 1298 1157 1883 1448 1725 1960 1974 2131

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

Minimum Circuit Ampacity (MCA) 28.1 8.1 12.5 8.1 12.5 12.5 12.5 14.7

Maximum Overcurrent Device 315 15 15 15 15 15 15 15

Transformer (VA) 40 40 40 40 40 40 40 40

Primary Limit Setting (°F) 210 150 150 150 150 160 150 160

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

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

Fan Delay On Heating 30 30 30 30 30 30 30 30

Off Heating * 150 150 150 150 150 150 150 150

Fan Delay On Cooling 6 6 6 6 6 6 6 6

Off Cooling 45 45 45 45 45 45 45 45

FanDelayOn-FanOnly 00000000

Gas Supply Pressure

(

atu

opa

(

" w.

)

7 / 11 7 / 11 7 / 11 7 / 11 7 / 11 7 / 11 7 / 11 7 / 11

Manifold Pressure

(

Natural/Pro

ane

)

(

" w.c.

)

3.5 / 10 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 45 / 55

Number of Burners 2 3 3 4 4 4 5 6

Vent Connector Diameter (inches) 4 4 4 4 4 4 4 4

BLOWER PERFORMANCE SPECIFICATIONS

NOTES:

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

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. INSTALLATIONISTOBEADJUSTEDTOOBTAINTEMPERATURERISEWITHINTHERANGESPECIFIEDONTHERATINGPLATE.

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. 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.

AMH8***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 1521 22 1466 23 1414 24 1373 24 1298 26 1243 1164 1075

*MH80403A*A* MED 2.5 1160 29 1160 29 1132 29 1121 30 1082 31 1042 997 925

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 1422 36 1352 38 1307 40 1197 43 1157 45 1092 1075 983

*MH80603A*A* MED 2.5 1098 47 1081 48 1051 49 1039 50 1021 51 983 924 868

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 ---- 2100 25 2042 25 1975 26 1883 28 1786 1700 1601

*MH80604B*A* MED 3.5 1668 31 1663 31 1656 31 1645 32 1616 32 1549 1492 1391

MED-LO 3.0 1419 37 1426 36 1426 36 1432 36 1419 37 1378 1328 1261

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

HIGH 3.0 1607 41 1572 42 1547 43 1498 45 1448 46 1390 1302 1222

*MH80803B*A* MED 2.5 1159 58 1156 58 1145 58 1127 59 1108 60 1075 1033 957

MED-LO 2.0 938 ---- 916 ---- 916 ---- 900 ---- 889 ---- 865 829 785

LOW 1.5 785 ---- 766 ---- 743 ---- 730 ---- 709 ---- 683 666 604

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

*MH80804B*A* MED 3.5 1736 38 1708 39 1652 40 1611 41 1540 43 1475 1394 1307

MED-LO 3.0 1493 45 1668 40 1459 46 1429 47 1389 48 1339 1274 1204

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

*MH80805C*A* MED 4.0 1852 36 1820 37 1777 38 1719 39 1641 41 1567 1469 1382

MED-LO 3.5 1615 41 1592 42 1556 43 1516 44 1470 45 1405 1346 1235

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

HIGH 5.0 2323 37 2225 38 2120 40 2040 42 1974 43 1801 1688 1577

*MH81005C*A* MED 4.0 1858 46 1847 46 1799 47 1744 49 1674 51 1577 1493 1399

MED-LO 3.5 1596 53 1587 54 1571 54 1552 55 1493 57 1397 1326 1217

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

HIGH 5.0 2469 42 2389 43 2300 45 2223 47 2131 49 2027 1902 1786

*MH81205D*A* MED 4.0 1575 66 1558 67 1545 67 1513 69 1500 69 1419 1354 1271

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)

0.1 0.2 0.3 0.4 0.5

Model Motor

Speed

EXTERNAL STATIC PRESSURE (Inches Water Column)