N8MPN050B12B1 44101261106

User Manual: N8MPN050B12B1

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CARBON MONOXIDE POISONING AND FIRE

HAZARD.

Failuretofollowsafetywarningsexactlycould

result in serious injury, death, and/or property

damage.

This furnace is not designed for use in mobile

homes, trailers or recreational vehicles.

ELECTRIC SHOCK HAZARD

Failure to follow safety warnings

exactly could result in serious

injury, death, and/or property

damage.

Turn Off All Power Before

Servicing.

International Comfort Products, LLC

Lewisburg, TN 37091

* Denotes Brands (C, H, T)

See section 5 for Category Idefinition.

INSTALLER: Affix these instructions

on or adjacent to the furnace.

CONSUMER: Retain these

instructions for future reference.

Portions of the text and tables are reprinted from NFPA 54 / ANSI Z223.1--2002ã, with permission of National Fire Protection Association, Quincy, MA 02269 and American Gas Association,

Washington, DC 20001. This reprinted material is not the complete and official position of the NFPA or ANSI, on the referenced subject, which is represented only by the standard in its entirety.

WARNING

Printed in U.S.A. 10/19/2004 441 01 2611 (06)

N8MPN&N8MPL

*8MPN&*8MPL

SAFETY REQUIREMENTS

Recognizesafetyinformation. Thisisthesafety--alertsymbol !. Whenyouseethissymbolonthefurnaceandininstructionmanualsbealert

to the potential for personal injury.

Understand thesignalwords DANGER,WARNING,or CAUTION. Thesewords areusedwiththe safety--alert symbol. DANGER identifiesthe

mostserioushazards,thosethatwillresultinseverepersonalinjuryordeath. WARNINGsignifiesahazardthatcouldresultinpersonalinjuryor

death. CAUTIONisusedtoidentify unsafepractices that couldresult inminor personal injury orproduct and property damage. Note is used to

highlight suggestions that will result in enhanced installation, reliability, or operation.

Installingandservicingheatingequipmentcanbehazardousduetogasandelectricalcomponents. Onlytrainedandqualifiedpersonnelshould

install, repair, or service heating equipment.

Untrained service personnel can perform basic maintenance functions such as cleaning and replacing air filters. All other operations must be

performed by trained service personnel. When working on heating equipment, observe precautions in the literature, on tags, and on labels at-

tached to or shipped with the furnace and other safety precautions that may apply.

Follow all safety codes. In the United States, follow all safety codes including the National Fuel Gas Code (NFGC) ANSI Z223.1--2002/NFPA

54--2002. InCanada,refertotheNationalStandardofCanada NaturalGasandPropaneInstallationCode(NSCNGPIC)CSAB149.1--00. Wear

safety glasses and work gloves. Have fire extinguisher available during start--up and adjustment procedures and service calls.

These instructions cover minimum requirements and conform to existing national standards and safety codes. In some instances, these

instructionsexceedcertainlocalcodesandordinances,especiallythosethatmaynothavekeptupwithchangingresidentialconstructionpractic-

es. We require these instructions as a minimum for a safe installation.

Table of Contents

1. Safe Installation Requirements 3...............

2. Installation 4..............................

3. Side Venting 8.............................

4. Combustion & Ventilation Air 9................

5. Gas Vent Installation 12.......................

6. Horizontal Venting 14.........................

7. Masonry Chimney Venting 16...................

8. Gas Supply and Piping 19.....................

9. Electrical Wiring 22.........................

10.Ductwork and Filter (Upflow/Horizontal) 23.......

11.Ductwork and Filter (Downflow) 25.............

12. Checks and Adjustments 29...................

13. Furnace Maintenance 33.....................

14. Sequence of Operation & Diagnostics 34.........

Tech Support and Parts 37.......................

2441 01 2611 06

START--UP CHECK SHEET

(Keep this page for future reference)

Recommended, but not required. Checklist DOES NOT apply in Canada

Dealer Name:

Address:Business Card Here

City, State(Province), Zip or Postal Code:

Phone:

Owner Name:

Address:

City, State(Province), Zip or Postal Code:

Model Number:

Serial Number:

Type of Gas: Natural: LP:

Blower Motor H.P.:

Supply Voltage:

Limit Opens at...(°F) or(°C)

Limit Closes at...(°F) or(°C)

Which blower speed tap is used?

(Heating) (Cooling)

Temperature of Supply Air: (°F) or(°C)

Temperature of Return Air: (°F) or(°C)

Rise (Supply Temp.--Return Temp.): (°F) or(°C)

Filter Type and Size:

Fan “Time ON” Setting:

Fan “Time OFF” Setting:

Manual Gas Shut--Off Upstream

of Furnace/Drip--Leg? YES NO

Drip--Leg Upstream of Gas Valve? YES NO

Blower Speed Checked? YES NO

All Electrical Connections Tight? YES NO

Gas Valve OK? YES NO

Measured Line Pressure When Firing Unit:

Calculated Firing Rate:(See Checks and Adjustments

Section).

Measured Manifold Pressure:

Thermostat OK? YES NO

Subbase Level? YES NO

Anticipator Set? YES NO Set At?:

Breaker On? YES NO

Date of Installation:

Date of Start--Up:

Dealer Comments:

441 01 2611 06

1. Safe Installation Requirements

FIRE, EXPLOSION, AND ASPHIXIATION HAZARD

Improper adjustment, alteration, service,

maintance or installation could cause serious

injury, death and/or property damage.

Installationorrepairsmadebyunqualifiedpersons

could result in hazards to you and others.

Installation MUST conform with local codes or, in

the absence of local codes, with codes of all

governmental authorities having jurisdiction.

The information contained in this manual is

intended for use by a qualified service agency that

is experienced in such work, is familiar with all

precautions and safety procedures required in

such work, and is equipped with the proper tools

and test instruments.

!WARNING

NOTE: This furnace is design--certified by the CSA International

(formerly AGA and CGA) for installation in the United States and

Canada. Refer to the appropriate codes, along with this manual,

for proper installation.

·Use only the Type of gas approved for this furnace (see

RatingPlateonunit).Overfiringwillresultinfailureofheat

exchanger and cause dangerous operation. (Furnaces

can be converted to LP gas with approved kit.)

·Installthisfurnaceonlyinalocationandpositionasspeci-

fied in “2. Installation” of these instructions.

·Provideadequatecombustionandventilationairtothefur-

naceasspecifiedin“4.CombustionandVentilationAir” of

these instructions.

·Combustionproducts must be discharged outdoors.Con-

nectthis furnacetoan approvedventsystemonly,asspe-

cifiedin“5.GasVentInstallation,6.HorizontalVentingand

7. Masonry Chimney Venting” of these instructions.

·Never test for gas leaks with an open flame. Use a com-

mercially available soapsolution made specifically for the

detectionofleakstocheckall connections,as specifiedin

“8. Gas Supply and Piping, Final Check” of these instruc-

tions.

·Always install furnace to operate within the furnace’s in-

tended temperature--rise range with a duct system which

hasanexternalstaticpressurewithintheallowablerange,

as specified in “Technical Support Manual” of these in-

structions.

·When a furnace is installed so that supply ducts carry air

circulated by the furnace to areas outside the space con-

tainingthefurnace,thereturnairshallalsobehandledbya

duct(s) sealed to the furnace casing and terminating out-

side the space containing the furnace.

·A gas--fired furnace for installation in a residential garage

must be installed as specified in “2. Installation” of these

instructions.

·This furnace is not to be used for temporary heating of

buildings or structures under construction.

See “2. Installation, Item 10”.

·This furnace is NOT approved for installation in mo-

bile homes, trailers or recreation vehicles.

·Seal around supply and return air ducts.

·Install correct filter type and size.

·Unit MUST be installed so electrical components are pro-

tected from direct contact with water.

Safety Rules

Your unit is built to provide many years of safe and dependable

serviceprovidingitisproperlyinstalledand maintained.However,

abuse and/or improper use can shorten the life of the unit and

create hazards for you, the owner.

A. The U.S. Consumer Product Safety Commission encourages

installation of carbon monoxide alarms. There can be various

sources of carbon monoxide in a building or dwelling. The

sources could be gas--fired clothes dryers, gas cooking

stoves, water heaters, furnaces, gas--fired fireplaces, wood

fireplaces, and several other items.

Carbon monoxide can cause serious bodily injury and/or

death. Carbon monoxide or “CO” is a colorless and odorless

gas produced when fuelis not burned completely or whenthe

flame does not receive sufficient oxygen.

Therefore,tohelpalertpeopleofpotentiallydangerouscarbon

monoxide levels, you should have a commercially available

carbon monoxide alarm that is listed by a nationally recog-

nizedtestingagencyinaccordancewithUnderwritersLabora-

tories Inc. Standard for Single and Multiple Station Carbon

Monoxide Alarms, ANSI/UL 2034 or the CSA 6.19--01 Resi-

dential Carbon Alarming Devices installed and maintained in

thebuildingordwellingconcurrentlywiththegas--firedfurnace

installation(seeNotebelow).Thealarmshouldbeinstalledas

recommended by the alarm manufacturer’s installation in-

structions.

B. There can be numerous sources of fire or smoke in a building

or dwelling. Fire or smoke can cause serious bodily injury,

death, and/or property damage. Therefore, in order to alert

peopleofpotentiallydangerousfireorsmoke,youshouldhave

fireextinguisherandsmokealarmslistedbyUnderwritersLab-

oratories installed and maintained in the building or dwelling

(see Note below).

Note: The manufacturer of your furnace does not test any alarms

and makes no representations regarding any brand or type

of alarms.

C. Toensuresafe and efficientoperationofyourunit,youshould

do the following:

1. Thoroughly read this manual and labels on the unit. This

will help you understand how your unit operates and the haz-

ards involved with gas and electricity.

2. Do not use this unit if any part has been under water. Im-

mediatelycallaqualifiedserviceagencytoinspecttheunitand

to replace any part of the control system and any gas control

which has been under water.

3. Never obstruct the vent grilles, or any ducts that provide

airtotheunit.Airmustbeprovidedforpropercombustionand

ventilation of flue gases.

4441 01 2611 06

Frozen Water Pipe Hazard

FROZEN AND BURST WATER PIPE HAZARD

FaiIure to protect against the risk of freezing could

result in property damage and/or personal injury.

Donotleaveyourhomeunattendedforlongperiods

during freezing weather without turning off water

supply and draining water pipes or otherwise

protecting against the risk of frozen pipes and

resultant damage.

!WARNING

Your furnace is designedsolely to provide a safe andcomfortable

living environment. The furnace is NOT designed to ensure that

water pipes will not freeze. It is equipped with several safety de-

vices that are designed to turn the furnace off and prevent it from

restarting in the event of various potentially unsafe conditions.

If your furnace remains off for an extended time, the pipes in your

home could freeze and burst, resulting in serious water damage.

If the structure will be unattended during cold weather you should

take these precautions.

1. Turnoffthewatersupplytothestructureanddrainthewater

lines if possible and add an antifreeze for potable water to

drain traps and toilet tanks. Open faucets in appropriate

areas.

-- or --

2. Have someone check the structure frequently during cold

weather to make sure it is warm enough to prevent pipes

from freezing. Instruct them on a service agency to call to

provide service, if required.

-- or --

3. Installareliableremotesensingdevicethatwillnotifysome-

body of freezing conditions within the home.

2. Installation

CARBON MONOXIDE POISONING HAZARD.

Failure to properly vent this furnace or other

appliances could result in death, personal injury

and/or property damage.

If this furnace is replacing a previously common-

vented furnace, it may be necessary to resize the

existing vent system to prevent oversizing

problems for the other remaining appliances(s).

SeeVentingandCombustionAirCheckinthe5.Gas

Vent Installation section of this instruction.

!WARNING

Location and Clearances

If furnace is a replacement, it is usually best to install the furnace

where the oldone was. Choose the location orevaluate the exist-

ing location based upon the minimum clearance and furnace di-

mensions (Figure 1 or Figure 2).

CARBON MONOXIDE POISONING HAZARD.

Failure to follow safety warnings could result in

serious injury, death, or property damage.

Do NOT operate furnace in a corrosive

atmosphere containing chlorine, fluorine or any

other damaging chemicals which could harm the

furnace and vent system, and permit spillage of

combustion products into an occupied space.

Refer to 4. Combustion & Ventilation Air section,

Contaminated Combustion Air for combustion air

evaluation and remedy.

!WARNING

Installation Requirements

1. Install furnace level.

2. ThisfurnaceisNOT tobeusedfortemporaryheatofbuildings

or structures under construction.

3. Install furnace as centralized as practical with respect to the

heat distribution system.

4. Install the vent pipes as short as practical. (See 5. Gas Vent

Installation section).

5. DoNOT installfurnacedirectlyoncarpeting,tileorothercom-

bustible material other than wood flooring.

6. Maintain clearance for fire safety and servicing. A front clear-

anceof30²is minimum for accessto the burner, controlsand

filter. See clearance requirements in Figure 1 or Figure 2.

7. Use a raised base if the floor is damp or wet at times.

8. Residential garage installations require:

·Burners and ignition sources installed at least 18²(457

mm) above the floor.

·Furnace must be located or physically protected from

possible damage by a vehicle.

9. Ifthefurnaceistobesuspendedfromthefloorjoistsinabase-

mentoracrawlspaceortheraftersinanattic,itisnecessaryto

use steel pipe straps or an angle iron frame to attach the fur-

nace. These straps should be attached to the furnace bottom

side with sheet metal screws and to the rafters or joists with

bolts. The preferred method is to use an angle iron frame

bolted to the rafters or joists.

10. Thisfurnacemaybeusedfor construction heat providedthat:

·The furnace is permanently installed with all electrical

wiring,piping,ventingandductinginstalledaccordingto

these installation instructions. A return air duct is pro-

vided, sealed to the furnace casing, and terminated out-

side the space containing the furnace. This prevents a

negativepressureconditionascreatedbythecirculating

air blower, causing a flame rollout and/or drawing com-

bustion products into the structure.

·The furnace is controlled by a thermostat. It may not be

“hot wired” to provide heat continuously to the structure

without thermostatic control.

·Clean outside air is provided for combustion. This is to

minimizethe corrosiveeffectsofadhesives,sealersand

otherconstructionmaterials. Italsopreventstheentrain-

mentofdrywalldustintocombustionair,whichcancause

fouling and plugging of furnace components.

·The temperature of the return air to the furnace is main-

tained between 55°F(13°C) and 80°F(27°C) , with no

evening setback or shutdown. The use of the furnace

whilethestructureisunderconstructionisdeemedtobe

intermittent operation per our installation instructions.

131/4

281/2

33/4

171/3

21/4

Dimensions and Clearances (N8MPN/L)

Figure 1

Drawing is representative, but some models may vary

DIMENSIONS IN INCHES

NOTE: Evaporator “A” coil drain pan dimensions may vary

from furnace duct opening size. Always consult evaporator

specifications for duct size requirements.

Furnace is designed for bottom return or side return.

Return air through back of furnace is NOT allowed.

25--23--44a1

TOP

51/3

31/4

LEFT SIDE

61/2

33/4

271/2

131/4

241/2

17/8213/4

265/8

131/4

47/811/2

RIGHT SIDE

281/2181/2

21/4

131/4

171/3

3/4

213/4

11/2

253/4

47/8265/817/8

FRONT

30²Min.

BOTTOM

C231/841/16

Plugged starting

hole to cut side

duct opening

Plugged starting hole to cut

side duct opening

441 01 2611 06

·The air temperature rise is within the rated rise range on

thefurnaceratingplate,andthefiringratehasbeensetto

the rating plate value.

·The filters used to clean the circulating air during the

construction process must be either changed or thor-

oughly cleaned prior to occupancy.

·The furnace, ductwork and filters are cleaned as neces-

sarytoremovedrywalldustandconstructiondebrisfrom

all HVAC system components after construction is com-

pleted.

·Verifyproperfurnaceoperatingconditionsincludingigni-

tion, gas input rate, airtemperature rise, and venting ac-

cording to these installation instructions.

MINIMUM CLEARANCES TO COMBUSTIBLE

MATERIALS FOR ALL FURNACES

REAR 0

FRONT (combustion air openings

in furnace and structure) 3²

Required For Service *24²

ALL SIDES Of SUPPLY PLENUM 1²

SIDES 0

VENT

Single--Wall Vent 6²

Type B--1 Double--Wall Vent 1²

TOP OF FURNACE 1²

*30²clearance recommended for casing removal.

Horizontal position:Line contact ispermissible only between lines

formed byintersections of top and two sides of furnace jacket, and

building joists, studs or framing.

DIMENSIONAL INFORMATION

Furnace Cabinet Bottom Return Air

Model A B C D

Opening

N8MPN/L050B12

N8MPN/L075B12 151/214 13/8125/8H

N8MPN/L075F16

N8MPN100F14

N8MPN/L100F20 191/8175/821/8143/4J

N8MPN/L100J22

N8MPN/L125J20

N8MPN/L125J22 223/4211/4115/16 183/4J

NOTE: Evaporator “A” coil drain pan dimensions may

vary from furnace duct opening size. Always consult

evaporator specifications for duct size requirements.

Furnace is designed for bottom return or side return.

Return air through back of furnace is NOT allowed.

175/16

303/4

291/2

21/4

33/4

271/2

175/16

21/4

Dimensions and Clearances (*8MPN/L Models)

Figure 2

Drawing is representative some models may vary

DIMENSIONS IN INCHES

213/4

LEFT SIDE

277/838

131/4

17/8265/8

321/2

33/4

11/2

47/8

51/3

TOP

FRONT

30²Min.

131/4

RIGHT SIDE

281/2181/23/4

213/4

47/8265/8

17/8

11/2

BOTTOM

C231/841/16

Plugged starting

hole to cut side

duct opening

Plugged starting hole to

cut side duct opening

6441 01 2611 06

MINIMUM CLEARANCES TO COMBUSTIBLE

MATERIALS FOR ALL UNITS

REAR 0

FRONT (combustion air openings

in furnace and structure) 3²

Required For Service *24²

ALL SIDES Of SUPPLY PLENUM 1²

SIDES 0

VENT

Single--Wall Vent 6²

Type B--1 Double Wall Vent 1²

TOP OF FURNACE 1²

*30²clearance recommended for casing removal.

Horizontal position:Line contact ispermissible only between lines

formed byintersections of top and two sides of furnace jacket, and

building joists, studs or framing.

DIMENSIONAL INFORMATION

Furnace Cabinet Top Bottom Return Air

Model A B F C D

Opening

*8MPN/L050B12

*8MPN/L075B12 151/214 6 13/8125/8H

*8MPN/L075F16

*8MPN100F14

*8MPN/L100F20 191/8175/873/421/8143/4J

*8MPN/L100J20

*8MPN/L125J20

*8MPN150J20 223/4211/491/2115/16 183/4J

* Denotes Brand

Furnace Installation

Inspecttheratingplatetobecertainthemodelnumberbeginswith

“N8MP” or“*8MP”.This identifies theunitasamulti--positionfur-

naceandcanbeInstalledinaUpflow,HorizontalRight,Horizontal

Left or Downflow position.

Upflow

No modifications are required for upflow installation. (See

Figure 3)

441 01 2611 06

Typical Upflow Installation

Figure 3

25--23--17

VENT

SUPPLY

AIR

GAS SUPPLY

RETURN

AIR

Horizontal

If you purchased a multi--position furnace, it can be installed hori-

zontally in an attic, basement, crawl space,alcove, or suspended

from a ceiling in a basement or utility room in either a right or left

airflow position. (see Figure 4)

Horizontally installed furnaces may be vented out the top of the

unitoroutthesidefacingup.See“Sideventing”forinstructionsto

rotate the vent to the side.

The minimum clearances to combustibles MUST be maintained

between the furnace and adjacent construction, as shown in

Figure 1 andFigure 2.ONLY thecornerofthecabinet is allowed

to contact the rafters as shown in Figure 4. All other clearances

MUST be observed as shown in Figure 1 and Figure 2.

Typical Horizontal Installation

Figure 4

VENT

GAS SUPPLY

SUPPLY

AIR

RETURN

AIR

25-23-18a

OPTIONAL

VENT LOCATION

Ifthefurnaceistobesuspendedfromthefloorjoistsinabasement

orcrawlspaceortheraftersinanattic,itis necessary to use steel

pipe straps or an angle iron frame to attach the furnace. These

straps should be attached to the furnace bottom side with sheet

metal screws and to the rafters or joists with bolts. The preferred

method isto use an angle iron frame boltedto the rafters or joists.

Ifthefurnaceistobeinstalledatgroundlevelinacrawlspace,con-

sult local codes. A concrete pad 1²to 2²thick is recommended.

Thirtyinches(30²)isrequiredbetweenthefrontofthefurnaceand

adjacent construction or other appliances. This should be main-

tained for service clearance.

Keep all insulating materials clear from louvered door. Insulating

materials may be combustible.

The horizontal furnaces may be installed directly on combustible

wood flooring orsupports, however, it isrecommended for further

fireprotectioncementboardor sheet metalisplacedbetweenthe

furnace and the combustible wood floor and extend 12²beyond

the front of the furnace louver door. (This is a recommendation

only, not a requirement).

This furnace MUST NOT be installed directly on carpeting, tile or

other combustible material other than wood flooring or supports.

Downflow

FIRE HAZARD.

Failure to install unit on noncombustible subbase

couldresultin death,personalinjuryand/orproperty

damage.

Place furnace on noncombustible subbase on

downflow applications, unless installing on

noncombustible flooring.

RNING

If you purchased a Multi--position furnace (*8MP) it may be

installed in a downflow configuration, (see Figure 5).The mini-

mumclearancestocombustionconstructionMUSTbemaintained

between the furnace and adjacent construction, as shown in

Figure 1 and Figure 2.

In addition to clearances in Figure 1 and Figure 2, clearance for

the vent pipe must be considered.

AsubbaseforcombustiblefloorsMUSTbeusedwhenthefurnace

isinstalledasadownflowoncombustiblematerial. See11.“Duct-

work and Filter” (Downflow Section). The outlet flange must be

bent flat for downflow installation.

When installing a four--position furnace in the downflow position

(not the *8DNL furnace), the logo is to be repositioned so that it is

rightside--up as follows:

T8MPN/L

1. Find the door hardware kit that is stored in the furnace and

save it.

2. Carefullyremovelogofromtheoutsideofburnercompartment

door and save it.

3. Carefullyremovetwosmallplugbuttons fromoutsideofblow-

er compartment door and save them.

4. Remove two thumbscrews from blower compartment door by

cutting apart metal retainer washers on inside of door with

smalldiagonalcuttingpliers.Theretainer washerswillnotun-

screw fromthe thumbscrews.Save the two thumbscrews and

two plastic washers.

5. Install two thumbscrews in holes at other end of blower

compartment door from where thumbscrews were removed.

a. A plastic washer should be on each of the two thumb-

screwsbefore insertingthethumbscrewsintotheblower

compartment door holes.

b. After inserting each thumbscrew into the proper hole in

the blower door, push anew metal retainer washeronto

each thumbscrew as far as it will go.

6. Install new strip ofrubber gasket on inside of blowercompart-

ment door on edge that does not already have a gasket.

7. Installlogoretainerpinsintoholesinblowercompartmentdoor

from which plug buttons were removed.

8. Installplugbuttonsintoholesinburnercompartmentdoorfrom

which logo was removed.

9. Install blower compartment door on furnace with bevel edge

and logo at top.

8441 01 2611 06

10. Installburnercompartmentdooronfurnacewithbeveledgeat

bottom.

N8MPN/L, C8MPN/L, H8MPN/L

1. Carefully remove logo from burner compartment door and

save it.

2. Turn the logo rightside--up, and install the logo retainer pins

into holes in burner compartment door.

3. New labels for rightside--up application on outside of blower

compartmentdoormaybepurchasedinakitfromyourdistrib-

utor to cover upside--down labels.

Downflow Venting: The combustion venter MUST be rotated to

ventoutthesideforalldownflowinstallations,(seeFigure 5).Bot-

tomventingisnotpermitted.See“Sideventing”forinstructionsto

rotatetheventtotheside.Inadditiontorotatingtheventtotheside

aVent Pipe Shield (NAHA002VC) is required to shield the hot

vent pipe.

BURN HAZARD.

Vent pipe is HOT and could cause personal injury.

Hot vent pipe is in reach of small children when

installed in downflow position.

Install vent pipe shield NAHA002VC.

WARNING

Pressure Switch Relocation

Ifthefurnaceisinstalledintheupflowposition,thepressureswitch

will remain in the sameposition as installed by the factory unless

the inducer is rotated. If the furnace is installed in an orientation

that places the pressure switch below the pressure tap on the in-

ducerhousing,thentheswitchMUST be relocated. In order tore-

locatetheswitch,locate2mountingholesordrillabovetheinducer

pressure tap. When drilling the 2 holes make sure to keep the

switch and tubing far enough away from the burners or hot sur-

facesastonotmeltthehose,switch,orwires.Topreventpossible

kinking of the pressure switch hose, trim the hose to remove ex-

cess length.

Note:Whendrillingnewholesmakesuremetalshavingsdonotfall

on or in components, as this can shorten the life of the furnace.

See side venting

for venter rotation

Typical Downflow Installation

Figure 5

VENT

GAS SUPPLY

MUST BE OPPOSITE

VENT DISCHARGE

SIDE

SUPPLY

AIR

RETURN

AIR

OPTIONAL VENT

25--23--19

Combustible floor

base outlet flange

adapter

Vent Shield

Kit

3. Side Venting

This furnace is shipped from the factory with the venter assembly

in an upflow configurations (top vent). The venter assembly can

easily be rotated to a side vent configurations for use in upflow,

horizontal--flow, or downflow application.

When using a side vent configuration (side outlet instead of top

outlet), it may be necessary to relocate the pressure switch to the

alternatepositionontheoppositesideofthetoppanel. Twoscrew

holes are provided at the alternate position. Route the pressure

switch tubing so the tubing is not kinked and not touching thehot

collector box, venter housing, or motor. It may be necessary to

shorten the length of the tubing to properly route the tubing and

eliminate kinks.

Rotating the Venter Assembly

1. If gas and electrical power have already been connected to

unitshutoffgasandremovepowerfromunit.Unscrewscrews

onburnercompartmentdoorandremoveburnercompartment

door. See Figure 6.

2. Disconnectpowerleads tothe ventermotorandhose topres-

sureswitch.Removethree(3)orfour(4)screwswhichsecure

the venter to the collector box, (see Figure 7).

3. Cut webbing with a pair of snips holding the vent plate to the

cabinetoneithertheleftorrightsideofunitdependingonright

or left venting as desired. Discard vent plate, (see Figure 6).

Figure 6

25--23--45

Screws (2)

Furnace with Screws

Vent Plate

441 01 2611 06

Figure 7 Venter Gasket

25--23--52b

Entry

25--23--52c

Main Line

4. Replace venter gasket (part # 1013540, if needed) to venter

assembly with adhesive in the same location as the old one.

5. Rotate venter assembly 90°right or left from original location

depending on venting configurations.

6. Tighten the three (3) or four (4) screws that secure the venter

assembly to the collector box. Do tighten screws enough to

compress venter gasket.

7. Replace power leads to venter motor and reconnect hose to

pressure switch.

NOTE: Unused open vent hole must be covered. A Vent Cover is

suppliedwithVentPipeShieldKitNAHA002VC.A55/16²diameter

VentCoverisavailableseparatelyfromyourdistributor,oronecan

be fabricated with sheet metal for all side vent installations.

4. Combustion & Ventilation Air

CARBON MONOXIDE POISONING HAZARD.

Failure to provide adequate combustion and

ventilationaircouldresultindeathand/orpersonal

injury.

Use methods described here to provide

combustion and ventilation air.

!WARNING

Furnaces require ventilation openings to provide sufficient air for

proper combustion and ventilation of flue gases. All duct or open-

ingsforsupplyingcombustionandventilationairmustcomplywith

thegas codes,orintheabsenceoflocalcodes,theapplicablena-

tional codes.

Combustion and ventilation air must be supplied in accordance

with one of the following:

1. Section8.3,AirforCombustionandVentilation,oftheNational

Fuel Gas Code, (NFGC),ANSI Z223.1--2002/NFPA 54--2002

in the U.S.,

2. Sections7.2,7.3,7.5,7.6,7.7,and7.8ofNationalStandardof

Canada, Natural Gas and Propane Installation Code

(NSCNGPIC), CSA B149.1--00 in Canada,

3. Applicable provisions of the local building code.

When the installation is complete, check thatall appliances have

adequate combustion air and are venting properly. See Venting

AndCombustionAirCheck in“5. Gas VentInstallation”Sectionin

this manual.

Contaminated Combustion Air

Installationsincertainareasortypesofstructurescouldcauseex-

cessive exposure to contaminated air having chemicals or halo-

gens that will result in safety and performance related problems

and may harm the furnace. These instances must use only out-

door air for combustion.

Thefollowingareasortypesofstructuresmaycontainorhaveex-

posure to the substances listed below. The installation must be

evaluated carefully as it may benecessary to provide outdoor air

for combustion.

·Commercial buildings.

·Buildings with indoor pools.

·Furnaces installed in laundry rooms.

·Furnaces installed in hobby or craft rooms.

·Furnaces installed near chemical storage areas.

·Permanent wave solutions for hair.

·Chlorinated waxes and cleaners.

·Chlorine based swimming pool chemicals.

·Water softening chemicals.

·De--icing salts or chemicals.

·Carbon tetrachloride.

·Halogen type refrigerants.

·Cleaning solvents (such as perchloroethylene).

·Printing inks, paint removers, varnishes, etc.

·Hydrochloric acid.

·Sulfuric Acid.

·Solvent cements and glues.

·Antistatic fabric softeners for clothes dryers.

·Masonry acid washing materials.

Outdoor Combustion Air Method

Aspacehavinglessthan50cubicfeetper1,000BTUHinputrating

forallgasappliancesinstalledinthespacerequiresoutdoorairfor

combustion and ventilation.

Air Openings and Connecting Ducts

1. Total input rating for all gas appliances in the space MUST be

considered when determining free area of openings.

2. Connect ducts or openings directly to the outdoors.

3. When screens are used to cover openings, the openings

MUST be no smaller than 1/4²mesh.

4. The minimumdimension of air ducts MUST NOT be less than

3².

5. Whensizingagrille,louverorscreenusethefreeareaofopen-

ing. If free area is NOT stamped or marked on grill or louver,

assumea20%freeareaforwoodand60%formetal. Screens

shall have a mesh size not smaller than1/4².

10 441 01 2611 06

Requirements

1. Providethespacewithsufficientairforpropercombustionand

ventilation of flue gases using horizontal or vertical ducts or

openings.

2. Figure 8illustrateshowtoprovidecombustionandventilation

airwhentwopermanentopenings,oneinletandoneoutlet,are

used.

a. One opening MUST commencewithin12²of the floor

and the second opening MUST commence within 12²of

the ceiling.

b. Size openings and ducts per Table 1.

Figure 8

Furnace

Minimum One Inlet and One Outlet Air Supply is Required

May be in and Combination Shown

Inlet Air Opening Must be Within12²(300mm) of floor

Outlet Air Opening Must be Within12²(300mm) of ceiling

(1) 1 Square Inch (6cm2) per 4000 BTUH

(2) 1 Square Inch (6cm2) per 2000 BTUH

Outside Air (This is ONLY a guide. Subject to codes of country having jurisdiction.)

This installation NOT approved in Canada

Gas Vent

Gable Vent Gable Vent

Outlet

Air (1)

Outlet Air (1)

Furnace

Outlet

Air (2)

Optional Inlet Air (1)

Ventilated Attic Ventilated Attic

Ventilated Crawl Space

Inlet

Air (1) Inlet

Air (1)

Inlet

Air (2)

Inlet

Air (2)

Top Above Insulation

Soffit Vent

c. Horizontal duct openings require 1 square inch of free

areaper2,000BTUH(1,100mm2/kW)ofcombinedinput

for all gas appliances in the space (see Table 1).

d. Verticalductopeningsoropeningsdirectlycommunicat-

ing with the outdoors require 1 square inch of free area

per 4,000 BTUH (550 mm2/kW) for combined input of all

gas appliances in the space (see Table 1).

3. When one permanent outdoor opening is used, the opening

requires:

a. 1 sq. in of free area per 3,000 BTUH (700 mm2/kW) for

combined input of all gas appliances in the space (see

Table 1) and

b. notlessthanthesumoftheareasofallventconnectorsin

the space.

The opening shall commence within 12²of the top of the enclo-

sure.Appliancesshallhaveclearancesofatleast1²fromthesides

andbackand6²fromthefront.Theopeningshalldirectlycommu-

nicatewiththeoutdoorsorshallcommunicatethroughaverticalor

horizontalducttotheoutdoorsorspaces(crawlorattic)thatfreely

communicate with the outdoors.

4. Combination of Indoor and Outdoor Air shall have:

a. Indoor openings that comply with the Indoor Combus-

tion Air Method below and

b. Outdoor openings located as required in the Outdoor

Combustion Air Method above and

c. Outdoor openings sized as follows.

1) Calculate the Ratio of all Indoor Space volume divid-

edbyrequiredvolumeforIndoorCombustionAirMeth-

od. Outdoor openings sized as follows.

2) OutdooropeningsizereductionFactoris1minusthe

Ratio in 1) above.

3) Minimum size of Outdoor openings shall be the size

required in Outdoor Combustion Air Method above

multiplied by reduction Factor.

Table 1 Free Area

Minimum Free Area Required for Each Opening orDuct to Outdoors

Input

Rating Two Horizontal Ducts

(sq. in./2,000 BTUH) Single Opening

(sq. in./3,000 BTUH) Two Vertical Ducts or Openings

(sq. in./4,000 BTUH)

Round Duct

(sq. in. /4,000

BTUH)

50,000 25 sq. in. 16.7 sq. in. 12.5 sq. in. 4²

75,000 37.5 sq. in. 25 sq. in. 18.75 sq. in. 5²

100,000 50 sq. in. 33.3 sq. in. 25 sq. in. 6²

125,000 62.50 sq. in. 41.7 sq. in. 31.25 sq. in. 7²

150,000 75 sq. in. 50 sq. in. 37.5 sq. in. 7²

EXAMPLE: Determining Free Area

Furnace

100,000

Furnace

100,000

Water Heater

30,000

Water Heater

30,000

Total Input

(130,000 ¸4,000)

Total Input

(130,000 ¸2,000)

32.5 Sq. In. Vertical

65 Sq. In. Horizontal

441 01 2611 06

Indoor Combustion Air

Standard and Known--Air--Infiltration Rate Methods

ãNFPA&AGA

Indoor air is permitted for combustion and ventilation, if the

Standard or Known--Air--Infiltration Rate Method is used.

CARBON MONOXIDE POISONING HAZARD.

Failure to supply adequate combustion air could

result in death and/or personal injury.

Mosthomeswill requireadditionalairfromoutdoors

for combustion andventilation. Aspace with atleast

50 cubic feet per 1,000 BTUH input rating or homes

with tight construction may need outdoor air to

supplement air infiltration for proper combustion

and ventilation of flue gases.

WARNING

The Standard Method may be used, if thespace has no less vol-

umethan50cubicfeet per1,000BTUHofthemaximuminputrat-

ings for all gas appliances installed in the space. The standard

method permits indoor air to be used for combustion and ventila-

tion air.

The Known Air Infiltration Rate Method shall be used if the in-

filtration rate is known to be less than 0.40 air changes per hour

(ACH) and equal to or greater than 0.10 ACH. Infiltration rates

greater than 0.60 ACH shall not be used. The minimumrequired

volume of the space varies with the number of ACH and shall be

determined per Table 2 or Equations 1 and 2. Determine the

minimum required volume for each appliance in the space, and

add the volumes together to get the total minimum required vol-

ume for the space.

MINIMUM SPACE VOLUME FOR 100% COMBUSTION AND VENTILATION AIR FROM INDOORS (ft3)

Table 2 Other Than Fan-Assisted Total

(1,000’s Btuh) Fan-assisted Total

(1,000’s Btuh)

ACH 30 40 50 50 75 100 125 150

0.60 1,050 1,400 1,750 1,250 1,875 2,500 3,125 3,750

0.50 1,260 1,680 2,100 1,500 2,250 3,000 3,750 4,500

0.40 1,575 2,100 2,625 1,875 2,813 3,750 4,688 5,625

0.30 2,100 2,800 3,500 2,500 3,750 5,000 6,250 7,500

0.20 3,150 4,200 5,250 3,750 5,625 7,500 9,375 11,250

0.10 6,300 8,400 10,500 7,500 11,250 15,000 18,750 22,500

0.00 NP NP NP NP NP NP NP NP

NP = Not Permitted

Table 2MinimumSpaceVolumesweredeterminedby usingthe

following equations from the National Fuel Gas Code ANSI

Z223.1/NFPA 54--2002, 8.3.3.2:

1. For other than fan--assisted appliances such as a draft

hood--equipped water heater,

1000 Btu / hr

21 ft3(Iother )

Volume other =ACH

2. For fan--assisted appliances such as this furnace,

1000 Btu / hr

15 ft3(Ifan )

Volume fan =ACH

If: Iother = combined input of all other than fan--assisted

appliances in Btu/hr

Ifan=combinedinputofallfan--assistedappliancesinBtu/hr

ACH = air changes per hour (ACH shall not exceed 0.60.)

The following requirements apply to the Standard Method andto

the Known Air Infiltration Rate Method.

·Adjoining rooms can be considered part of a space, if there

are no closable doors between rooms.

·Anatticorcrawlspacemaybeconsideredaspace thatfreely

communicateswiththeoutdoorsprovidedthereareadequate

ventilationopeningsdirectlytooutdoors.OpeningsMUSTre-

mainopenandNOThaveanymeansofbeingclosedoff.Ven-

tilation openings to outdoors MUST be at least 1 square inch

offree areaper4,000BTUHoftotalinputratingforallgasap-

pliances in the space.

·In spaces that use the Indoor Combustion Air Method, in-

filtration should be adequate to provide air for combustion,

ventilation and dilution of flue gases. However, in buildings

withunusually tightconstruction,additional airMUST bepro-

vided using the methods described in section titled Outdoor

Combustion Air Method:

·Unusually tight construction is defined as Construction with:

1. Walls and ceilings exposed to the outdoors have a con-

tinuous, sealed vapor barrier.Openings are gasketed or

sealed and

2. Doors and openable windows are weather stripped and

3. Other openings are caulked or sealed. These include

joints around window and door frames, between sole

plates and floors, between wall--ceiling joints, between

wall panels, at penetrations for plumbing, electrical and

gas lines, etc.

Ventilation Air

Someprovincialcodesandlocal municipalitiesrequireventilation

or make--up air be brought into the conditioned space as replace-

mentair.Whichevermethodisused,themixedreturnairtempera-

ture across the heat exchanger MUST not fall below 60°

continuously,or55°on anintermittentbasissothatflue gases will

not condense excessively in the heat exchanger. Excessive con-

densation will shorten the life of the heat exchanger and possibly

void your warranty.

12 441 01 2611 06

5. Gas Vent Installation

CARBON MONOXIDE POISONING, FIRE AND

EXPLOSION HAZARD.

Failure to properly vent this furnace could result in

death, personal injury and/or property damage.

Read and follow all instructions in this section.

!WARNING

Install the vent in compliance with codes of the country having ju-

risdiction, local codes or ordinances and these instructions.

This Category Ifurnace is fan--assisted. A fan assisted appliance

isanapplianceequippedwithanintegralmechanicalmeanstoei-

ther draw or force products of combustion through the heat ex-

changer.

Category Ifurnace definition: A central furnace which operates

with a non--positive vent static pressure and with a flue loss not

lessthan17percent. Thesefurnacesareapprovedforcommon--

venting and multi--story venting with other fan--assisted or draft

hood--equipped appliances in accordance with the NFGC or

NSCNGPIC

Category ISafe Venting Requirements

Category Ifurnace vent installations shall be in accordance with

Parts 10 and 13 of the National Fuel Gas Code (NFGC), ANSI

Z223.1--2002/NFPA54--2002;and/orSection7andAppendixCof

the CSA B149.1--00, National Standard of Canada, Natural Gas

and Propane Installation Code; the local building codes; furnace

and vent manufacturer’s instructions.

NOTE: The following instructions comply with the ANSI

Z223.1/NFPA 54 National Fuel Gas Code and CSA B149.1 Natu-

ral Gas and Propane Installation code, based on the input rateon

the furnace rating plate.

1. If a Category Ivent passes through an attic, any concealed

space or floor, use ONLY Type B or Type L double wall vent

pipe.Ifventpipepassesthroughinteriorwall,useTypeBvent

pipe with ventilated thimble ONLY.

2. Do NOT vent furnace into any chimney serving an open fire-

place or solid fuel burning appliance.

3. Use the same diameter Category Iconnector or pipe as per-

mitted by:

·the National Fuel Gas Code Code (NFGC) ANSI

Z223.1--2002 / NFPA 54--2002 sections 10 and 13 vent-

ing requirements in the United States

·the National Standard of Canada Natural Gas and Pro-

pane Installation Code (NSCNGPIC) CSA B149.1--00

section7andappendixCventingrequirementsinCana-

da.

4. Push the vent connector onto the furnace flue collar of the

venterassemblyuntilittouchesthebead(atleast5/8²overlap)

and fasten with at least two field--supplied, corrosion--resist-

ant, sheet metal screws located at least 140°apart.

5. Keep vertical Category Ivent pipe or vent connector runs as

short and direct as possible.

6. Vertical outdoor runs of Type--B or ANY single wall vent pipe

below the roof line are NOT permitted.

7. Slopeallhorizontalrunsupfromfurnacetotheventterminal a

minimum of 1/4²per foot (21 mm/m).

8. Rigidlysupportallhorizontalportionsoftheventingsystemev-

ery6¢or less usingproper clamps andmetal straps to prevent

sagging and ensure there is no movement after installation.

9. Checkexistinggasventorchimneytoensuretheymeetclear-

ances and local codes. See Figure 1

10. The furnace MUST be connected to a factory built chimney or

vent complying with a recognized standard, or a masonry or

concretechimneylinedwithaliningmaterialacceptabletothe

authority having jurisdiction. Venting into an unlined ma-

sonrychimneyorconcretechimneyisprohibited.Seethe

6. Masonry Chimney Venting section in these instruc-

tions.

11. Fan--assisted combustion system Category Ifurnaces shall

not be vented into single--wall metal vents.

12. Category Ifurnaces must be vented vertically or nearly verti-

cally, unless equipped with a listed mechanical venter.

13. VentconnectorsservingCategoryIfurnacesshallnotbecon-

nectedintoanyportionofmechanicaldraftsystemsoperating

under positive pressure.

A4--to--3inchreducerispermittedatthefluecollarwheninstalling

a50,000Btuhgasinputfurnace,iftheinstallationmeetsallthefol-

lowing requirements for sizing the vent connectors and vents:

1. The National Fuel Gas Code, ANSI

Z223.1/NFPA--54--2002, sections 10.5.3.1(1),

10.6.3.1(2), 10.10.3.1, 13.1.2, 13.1.10, and 13.2.21(1)

through (3) in the U.S. or

2. The Natural Gas and Propane Installation Code CSA

B149.1--00, sections 7.13.1(b), 7.13.2(b), 7.18.5(b),

and Appendix C--GVR no. 2. in Canada.

441 01 2611 06

Venting and Combustion Air Check

NOTE: When an existing Category I furnace is removed or re-

placed,theoriginalventingsystemmaynolongerbesizedtoprop-

erly vent the attached appliances, and to make sure there is

adequate combustion air for all appliances, MAKE THE FOL-

LOWING CHECK.

CARBON MONOXIDE POISONING HAZARD

Failure to follow the steps outlined below for each

applianceconnectedtotheventingsystembeingplaced

into operation, could result in carbon monoxide

poisoning or death:

The following steps shall be followed for each appliance

connected to the venting system being placed into

operation, while all other appliances connected to the

venting system are not in operation:

1.Seal any unused openings in the venting system.

2.Inspect the venting system for proper size and horizontal

pitch, as required in the National Fuel Gas Code, ANSI

Z223.1/NFPA 54 or CSA B149.1, Natural Gas and

Propane Installation Code and these instructions. Deter-

minethatthereisnoblockageorrestriction,leakage,cor-

rosionandotherdeficiencieswhichcouldcauseanunsafe

condition.

3.As far as practical, close all building doors and windows

andalldoorsbetweenthespaceinwhichtheappliance(s)

connected to the venting system are located and other

spaces of the building.

4.Close fireplace dampers.

5.Turnonclothesdryersandanyappliancenotconnectedto

the venting system. Turn on any exhaust fans, such as

range hoods and bathroom exhausts, so they are

operating at maximum speed. Do not operate a summer

exhaust fan.

6.Followthelightinginstructions.Placethe appliancebeing

inspected into operation. Adjust the thermostat so

appliance is operating continuously.

7.Test for spillage from draft hood equipped appliances at

thedrafthoodreliefopeningafter5minutesofmainburner

operation. Use the flame of a match or candle. (Figure 9)

8.If improper venting is observed, during any of the above

tests,theventingsystemmustbecorrectedinaccordance

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

and/orCSAB149.1,NaturalGasandPropaneInstallation

Code.

9.After it has been determined that each appliance con-

nected to the venting system properly vents when tested

as outlined above, return doors, windows, exhaust fans,

fireplace dampers and any other gas--fired burning

appliance to their previous conditions of use.

!WARNING

Vent Check

Draft HoodVent Pipe

Match

Typical Gas

Water Heater

Figure 9

NOTE: If flame pulls towards draft hood, this indicates

sufficient infiltration air.

Venting to Existing Masonry Chimney

Dedicated venting of one fan assisted furnace into any ma-

sonry chimney is restricted. A chimney must first be lined with

either Type B vent sized in accordance with NFGC tables 13.1 or

13.2 or a listed, metal lining system, or venting into a masonry

chimneyispermittedasoutlinedwith useofanoptionallistedma-

sonry chimney kit. (See Section 7 Masonry Chimney Venting of

these instructions.)

Listed, corrugated metallic chimney liner systems in masonry

chimneysshallbesizedbyusingNFGC tablesper13.1.7fordedi-

cated venting and per 13.2.19 for common ventingwith the maxi-

mum capacity reduced by 20% (0.80 X maximum capacity) and

theminimumcapacityasshownintheapplicabletable.InCanada,

use the NSCNGPIC, appendix C, section 10. Corrugated metal

vent systems installed with bends or offsets require additional re-

ductionof 5%oftheventcapacityforeachbendupto45°and10%

of the vent capacity for each bend from 45°up to 90°.

NOTE:Two(2)45°elbows are equivalent to one (1) 90°elbow.

Combined Venting into a Masonry Chimney

Ventingintoamasonryorconcretechimneyisonlypermitted

as outlined in the NFGC or NSCNGPIC venting tables. Follow

all safe venting requirements.

Note: See section “7. Masonry Chimney Venting”.

14 441 01 2611 06

6. Horizontal Venting

Category IFurnaces With External Power

Venters

InordertomaintainaCategoryIclassificationof fan--assistedfur-

naceswhenventedhorizontallywithsidewalltermination,apower

venter is REQUIRED to maintain a negative pressure in the vent-

ing system.

In the U.S.: Per the NFGC, a listed power venter may be used,

when approved by the authority having jurisdiction.

In Canada: Only power venters approved by the appliance

manufacturer and where allowed by the authority having jurisdic-

tion may be used

PleaseconsulttheFieldsControlsCo. orTjernlundProducts,Inc.

for power venters certified for use with our furnaces.

Vent Termination

Venting Through a Non--Combustible and

Combustible Wall

Consult External Power Venter manufacturer instructions.

Selectthepowerventertomatchthe Btuhinputofthefurnacebe-

ingvented. FollowallofthePowerVentermanufacturer’sinstalla-

tion requirements included with the power venter for:

·venting installation,

·vent terminal location,

·preventing blockage by snow,

·protectingbuildingmaterialsfromdegradationbyfluegases,

·see Figure 10 for required vent termination.

NOTE: It is the responsibility of the installer to properly terminate

theventandprovideadequateshielding. Thisisessentialinorder

to avoid water/ice damage to building, shrubs and walkways.

AIR SUPPLY INLET

VVENT TERMINAL AREA WHERE TERMINAL IS NOT PERMITED

25--24--65--2

Other than Direct Vent Termination Clearance

Figure 10

441 01 2611 06

Item Clearance Descriptions Canadian Installation (1) U.S. Installation (2)

AClearance above grade, veranda, porch, deck, balcony, or

anticipated snow level 12²(30cm) # 12²(30 cm)

BClearance to a window or door that may be opened 6²(15 cm) for appliances £10,000 BTUH (3kW), 12²(30

cm) for appliances > 10,000 Btuh (3 kW) and £100,000 Btuh

(30 kW), 36²(91 cm) for appliances > 100,000 Btuh (30 kW)

4¢(1.2 m) below or to the side of the opening. 1¢(30 cm)

above the opening.

CClearance to a permanently closed window * *

DVertical clearance to a ventilated soffit located above the ter-

minal within a horizontal distance of 2¢(61cm) from the cent-

erline of the terminal

* *

EClearance to an unventilated soffit * *

FClearance to an outside corner * *

GClearance to an inside corner * *

HClearance to each side of the centerline extended above elec-

trical meter or gas service regulator assembly 3¢(91 cm) within 15¢(4.5 m) above the meter/regulator

assembly 3¢(91 cm) within 15¢(4.5 m) above the meter/regulator

assembly

IClearance to service regulator vent outlet 3¢(91 cm) *

JClearance to non--mechanical air supply inlet to building or the

combustion air inlet to any other appliance 6²(15 cm) for appliances £10,000 BTUH (3kW), 12²(30

cm) for appliances > 10,000 Btuh (3 kW) and £100,000 Btuh

(30 kW), 36²(91 cm) for appliances > 100,000 Btuh (30 kW)

4¢(1.2 m) below or to the side of opening: 1¢(30 cm) above

opening.

KClearance to a mechanical air supply inlet 6¢(1.83 m) 3¢(91 cm) above if within 10¢(3m horizontally)

LClearance under a veranda, porch, deck, or balcony 12²(30 cm) + *

MClearance to each side of the centerline extended above or

below vent terminal of the furnace to a dryer or water heater

vent, or other appliance’s direct vent intake or exhaust.

* *

NClearance from a plumbing vent stack 3¢(91 cm) 3¢(91 cm)

(1.) In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code

(2.) In accordance with the current ANSI Z223.1/NFPA 54, National Fuel Gas Code

#18²(46 cm) above roof surface

+ Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.

*For clearances not specified in ANSI Z223.1/NFPA 54 or CSA B149.1, clearances shall be in accordance with local installation codes and the requirements of the gas supplier and the manufacture’s

installation instructions.

Notes:

1. The vent for this appliance shall not terminate

a. Over public walkways; or

b. Near soffit vents or crawl space vents or other areas where condensate or vapor could create a nusiance or hazard or property damage; or

c. Where condensate vapor could cause damage or could be detrimental to the operation of regulators, relief valves, or other equipment.

2. When locating vent terminations, consideration must be given to prevailing winds, location, and other conditions which may cause recirculation of the combustiob products of adjacent vents.

Recirculation can cause poor combustion, inlet condensate problems, and accelerated corrosion of the heat exchangers.

16 441 01 2611 06

7. Masonry Chimney Venting

Chimney Inspection

All masonry chimney construction must conform to Standard

ANSI/NFPA 211--2003 and to any state or local codes applicable.

The chimney must be in good condition and a complete chimney

inspectionmustbeconductedpriortofurnaceinstallation.Ifthein-

spection reveals damage or abnormal conditions, make neces-

sary repairs or seek expert help. See Figure 11 “The Chimney

Inspection Chart”. Measure inside area of tile--liner and exact

height of chimney from the top of the chimney to the highest ap-

pliance flue collar or drafthood outlet.

Connector Type

To reduce flue gas heat loss and the chance of condensate prob-

lems, the vent connector must be double--wall Type B vent.

Venting Restrictions for Chimney Types

Interior Chimney -- has no sides exposed to the outdoors below

the roofline. All installations can be single furnace or common

vented with another draft hood equipped Category Iappliance.

Exterior Chimney -- has one or more sides exposed to the out-

doors below the roof line. All installations with a 99% Winter De-

sign Temperature* below 17°F must be common vented only with

a draft hood equipped Category I appliance.

*The 99% Winter Design Dry--Bulb (db) temperatures are found in the

1993 ASHRAE Fundamentals Handbook, Chapter 24, Table 1 (United

States)and2(Canada),orusethe99.6%heatingdbtemperaturesfound

in the 1997 or 2001 ASHRAE Fundamentals Handbook, Climatic

Design Information chapter, Table 1A (United States) and 2A

(Canada).

CARBON MONOXIDE POISONING, FIRE AND

EXPLOSION HAZARD.

Failure to properly vent this furnace could result in

death, personal injury and/or property damage.

These furnaces are CSA (formerly AGA and CGA)

design--certified for venting into exterior clay

tile--lined masonry chimneys with a factory

accessory Chimney Adapter Kit. Refer to the

furnace rating plate for correct kit usage. The

Chimney Adapter Kits are for use with ONLY

furnaces having a Chimney Adapter Kit number

marked on the furnace rating plate.

!WARNING

Ifaclaytile--linedmasonrychimneyisbeingusedanditisexposed

to the outdoors below the roof line, relining might be required.

Chimneys shall conform to the Standard for Chimneys, Fire-

places, Vents, and Solid Fuel Burning Appliances ANSI/NFPA

211--2003 in the United States and to a Provincial or Territorial

Building Code in Canada (in its absence, the National Building

Code of Canada) and must be in good condition.

U.S.A.--RefertoSections13.1.9or13.2.20oftheNFGCortheau-

thorityhavingjurisdictiontodeterminewhetherreliningisrequired.

If relining is required, use a properly sized listed metal liner,

Type--B vent, or a listed alternative venting design.

NOTE: See the NFGC, 13.1.9 and 13.2.20 regarding alternative

venting design and the exception, which cover installations such

as the Chimney Adapter Kits NAHA001DH and NAHA002DH.

The Chimney Adapter Kits are listed alternative venting designs

for these furnaces. See the kit instructions for complete details.

Canada(andU.S.A.)--Thisfurnaceispermittedtobeventedintoa

clay tile--lined masonry chimney that is exposed to the outdoors

below the roof line, provided:

1. Vent connector is Type--B double--wall, and

2. This furnace is common vented with at least 1 draft hood--

equipped appliance, and

3. The combined appliance input rating is less than the maxi-

mum capacity given in Table A, and

4. Theinputratingofeachspace--heatingapplianceisgreater

than the minimuminput rating given in Table B for Masonry

Chimneys for the local 99% Winter Design Temperature.

Chimneys having internal areas greater than 38 square

inches require furnace input ratings greater than the input

ratingsofthesefurnaces. SeefootnoteatbottomofTableB,

and

5. The authority having jurisdiction approves.

If all of these conditions cannot be met, an alternative venting de-

sign shall be used, such as the listed chimney adapter kit with a

furnace listed for use with the kit, a listed chimney--lining system,

or a Type--B vent.

These furnaces are CSA design--certified for use in exterior clay

tile--lined masonry chimneys with a factory accessory Chimney

AdapterKit. Referto thefurnaceratingplateforcorrectkitusage.

The Chimney Adapter Kits are listed alternative venting designs

andareforusewithONLYfurnaceshavingaChimneyAdapterKit

number marked on the furnace rating plate.

441 01 2611 06

Chimney is

acceptable for use

Crown

condition:

Missingmortar

or brick?

Rebuild

crown

Chimney properly lined

with clay tile

liner?

Yes

liner and top

seal in good

condition

Debris in

cleanout? Mortar, tile,

metal vent, fuel oil

residue?

Repair

liner or top seal

or reline chimney as

necessary.

Reline

Yes Repair

Yes

Clay

tile misalignment,

missingsections,

gaps?

Is Chimney

lined with properly

sized, listed liner or

Type--B vent? Line chimney with properly

sized, listed flexible metal

liner or Type--B vent per NFGC or

NSCNGPIC Vent Sizing Tables

and liner or vent manufacturer’s

installation instructions.

CHIMNEY INSPECTION CHART

ForadditionalrequirementsrefertotheNationalFuelGasCodeNFPA54/ANSIZ223.1--2002andANSI/NFPA211--2003Chimneys,Fireplaces,Vents,andSolidFuel

Burning Appliancesin the U.S.A. or to the Canadian Installation Code CSA B149.1--00 in Canada.

Yes

Mortar or

tile debris? Yes Remove mortar

and tile debris?

Remove metal vent or liner.

Consult

Part B of chimney

adapter venting

instructions for

application

suitability.

Chimney

exposed to outdoors

below roof line? Is Chimney to

be dedicated to a

single furnace?

Yes Install chimney

adapter per

instructions.

Not Suitable

Suitable

Consult

Part C of chimney

adapter venting

instructions for

application

suitability.

Suitable

Install chimney

adapter per

instructions.

Condensate

drainage at bottom

of chimney? Yes

Figure 11

18 441 01 2611 06

Exterior Masonry Chimney,

FAN+NAT Installations with

Type--B Double--Wall Vent Connectors

ãã

ãNFPA&AGA

Table A--

Combined Appliance

Maximum Input Rating in

Thousands of Btu per Hr

VENT

HEIGHT

(

)

INTERNAL AREA OF CHIMNEY

(SQ IN.)

(FT) 12 19 28 38

674 119 178 257

880 130 193 279

10 84 138 207 299

15 NR 152 233 334

20 NR NR 250 368

30 NR NR NR 404

Table B--

Minimum Allowable Input Rating of

Space--Heating Appliance in

Thousands of Btu per Hr

VENT

HEIGHT

(

)

INTERNAL AREA OF CHIMNEY

(SQ IN.)

(FT) 12 19 28 38

Local 99% Winter Design Temperature: 17 to 26°

°°

°F*

6055 99 141

6°

°F

852 74 111 154

10 NR 90 125 169

15 NR NR 167 212

20 NR NR 212 258

30 NR NR NR 362

Local 99% Winter Design Temperature: 5 to 16°

°°

°F*

6NR 78 121 166

°F

8NR 94 135 182

10 NR 111 149 198

15 NR NR 193 247

20 NR NR NR 293

30 NR NR NR 377

Local 99% Winter Design Temperature: --10 to 4°

°°

°F*

6NR NR 145 196

4°

°F

8NR NR 159 213

10 NR NR 175 231

15 NR NR NR 283

20 NR NR NR 333

30 NR NR NR NR

-- 11 °

°°

°F

or Local 99% Winter Design Temperature: --11°

°°

°For

lower*

lower Not recommended for any vent configuration

*The 99% Winter Design Dry--Bulb (db) temperatures are found in the

1993 ASHRAE Fundamentals Handbook, Chapter 24, Table 1

(United States) and 2 (Canada), or use the 99.6% heating db

temperaturesfound in the 1997 or 2001 ASHRAE Fundamentals

Handbook, Climatic Design Information chapter, Table 1A (United

States) and 2A (Canada).

Inspectionsbeforethesaleandatthetimeofinstallationwilldeter-

minetheacceptabilityofthechimney ortheneedforrepairand/or

(re)lining. Refer to the Chimney Inspection Chart to perform a

chimney inspection.

If the inspection of a previously used tile--lined chimney:

a. Showssignsofventgascondensation,thechimneyshould

be relined in accordance with local codes and the authority

having jurisdiction. The chimney should be relined with a

listed metal liner, Type--B vent, or a listed chimney adapter

kittoreducecondensation. Ifacondensatedrainisrequired

bylocalcode,refertotheNFGC,Section10.9foradditional

information on condensate drains.

b. Indicates the chimney exceeds the maximum permissible

sizeinthetables,thechimneyshouldberebuiltorrelinedto

conform to the requirements of the equipment being

installed and the authority having jurisdiction.

Achimneywithouta claytile liner,whichisotherwisein goodcon-

dition,shallberebuilttoconformtoANSI/NFPA211orbelinedwith

a UL listed (ULC listed in Canada) metal liner orUL listed Type--B

vent. Relining with a listed metal liner or Type--B vent is consid-

ered to be a vent--in--a--chase.

If a metal liner or Type--B vent is used to line a chimney, no other

appliance shall be vented into the annular space between the

chimney and the metal liner.

APPLIANCE APPLICATION REQUIREMENTS

Appliance operation has a significant impact on the performance

of the venting system. If the appliances are sized, installed, ad-

justed, and operated properly, the venting system and/or the ap-

pliances should not suffer fromcondensation and corrosion. The

ventingsystemandallappliancesshallbeinstalledinaccordance

with applicable listings, standards, and codes.

The furnace should be sized to provide 100 percent of the design

heating load requirement plus any margin that occurs because of

furnace model size capacity increments. Heating load estimates

can be made using approved methods available from Air Condi-

tioning Contractors of America (Manual J); American Society of

Heating, Refrigerating, and Air--Conditioning Engineers; or other

approved engineering methods. Excessive oversizing of the fur-

nace could cause the furnace and/or vent to fail prematurely.

Whenametalventormetallinerisused,theventorlinermustbein

goodconditionandbeinstalledinaccordancewiththeventorliner

manufacturer’s instructions.

To prevent condensation in the furnace and vent system, the fol-

lowing precautions must be observed:

1. Thereturn--airtemperaturemustbeatleast60°Fdbexcept

for briefperiods of time duringwarm--up from setback atno

lower than 55°F db or during initial start--up from a standby

condition.

2. Adjust the gas input rate per the installation instructions.

Lowgasinputratecauseslowventgastemperatures,caus-

ing condensation and corrosion in the furnace and/or vent-

ing system. Derating is permitted only for altitudes above

2000¢.

3. Adjust the air temperature rise to the midpoint of the rise

rangeorslightlyabove. Lowairtemperaturerisecancause

low vent gas temperature and potential for condensation

problems.

4. Set the thermostat heat anticipator or cycle rate to reduce

short cycling.

Air for combustion must not be contaminated by halogen com-

poundswhichincludechlorides,fluorides,bromides,andiodides.

These compounds are found in many common home products

suchasdetergent,paint,glue,aerosolspray,bleach,cleaningsol-

vent, salt, and airfreshener, and can cause corrosion offurnaces

and vents. Avoid using such products in the combustion--air sup-

ply. Furnace use during construction of the building could cause

thefurnacetobeexposedtohalogencompounds,causingprema-

ture failure of the furnace or venting system due to corrosion.

441 01 2611 06

Vent dampers on any appliance connected to the common vent

can cause condensationand corrosion in the ventingsystem. Do

notuse ventdamperson appliancescommonventedwiththisfur-

nace.

8. Gas Supply and Piping

CARBON MONOXIDE POISONING, FIRE AND

EXPLOSION HAZARD.

Failure to follow safety warnings exactly could

result in serious injury, death, and/or property

damage.

Models designated for Natural Gas are to be used

withNaturalGasONLY,unlessproperlyconvertedto

use with LP gas.

!WARNING

Gas Supply Requirements

·UseonlytheTypeofgasapprovedforthisfurnace.Seerating

plate for approved gas type.

·Gasinputmustnotexceedtheratedinputshownontherating

plate. Overfiring will result in failure of heat exchanger and

cause dangerous operation.

·Donotallowminimumsupplypressuretovarydownward.Do-

ing so willdecrease input to furnace. Refer to Table 3 for gas

supply. Refer to Table 7 and Table 8 for manifold pressures.

Table 3 Gas Pressures

Supply Pressure

ype Recommended Max. Min.

Natural 7²14²4.5²

Propane 11²14²11²

Gas Piping Requirements

NOTE:Thegassupplylinemustbeinstalledbyaqualifiedservice

technician in accordance with all building codes.

NOTE: In the state of Massachusetts.

a. Gas supply connections MUST be performed by a li-

censed plumber or gas fitter).

b. Whenflexibleconnectorsareused,themaximumlength

shall not exceed 36²(915 mm).

c. When lever handle type manual equipment shutoff

valves are used, they shall be T--handle valves.

d. TheuseofcoppertubingforgaspipingisNOTapproved.

1. Installgaspipinginaccordancewithlocalcodes,orintheab-

sence of local codes, the applicable national codes.

2. It is recommended that a manual equipment shutoff valve be

installed in the gas supply line outside the furnace. Locate

valveasclosetothefurnaceaspossiblewhereitisreadilyac-

cessible. Refer to Figure 12.

FIRE HAZARD

Failure to follow safety warnings exactly could

result in serious injury, death, and/or property

damage.

Use wrench to hold furnace gas control valve when

turning elbows and gas line to prevent damage to

the gas control valve and furnace.

RNING

Typical Gas Piping (N8MP)

Figure 12

Left entry

Right entry

Dipleg&pipecap

Left side entry

Union

Manual Equipment Shutoff Valve

25--24--36

3. Useblackironorsteelpipeandfittingsorotherpipeapproved

by local code.

4. Use pipe thread compound which is resistant to natural and

LP gases.

5. Use ground joint unions and install a drip leg no less than 3²

long to trap dirt and moisture before it can enter gas control

valve inside furnace.

6. Providea1/8²NPTpluggedtappingfortestgaugeconnection

immediately up stream of gas supply connection to furnace.

7. Usetwopipewrencheswhen making connections toprevent

furnace gas control valve from turning.

NOTE:Iflocalcodes allowtheuseofa flexiblegasappliancecon-

nector,alwaysuseanewlistedconnector. Donotuseaconnector

which has previously served another gas appliance.

8. Flexible corrugated metal gas connector may NOT be used

inside the furnace or be secured or supported by the furnace

or ductwork.

9. Properly size gas pipe to handle combined appliance load or

run gas pipe directly from gas meter or LP gas regulator.

10. Install correct pipe size for run length and furnace rating.

11. MeasurepipelengthfromgasmeterorLPsecondstageregu-

lator to determine gas pipe size.

20 441 01 2611 06

Right Side Gas Supply Piping (N8MP)

Gaslinecanbeinstalleddirectlytothegas valvethroughthehole

provided in the right side of the cabinet. See Figure 12

Left Side Gas Supply Piping (N8MP)

Two(2) 90°street elbows or two(2) 90°standard elbows and

two(2) close nipples are required for left side gas supply. See

Figure 12.

Piping with Street Elbows

1. Assembletheelbowssothattheoutletofone(1)elbowis90°

fromtheinletof theother.Theelbows shouldbetightenough

to be leak proof. An additional 1/4turn will be required at the

end of step 2, see Figure 13.

2. Screw elbow assembly into gas valve far enough to be leak

proof.Positionelbowassemblysothattheinletoftheelbowis

at the top of the gas valve. An additional 3/8turn will be re-

quired in step 3. Turn open end of inlet elbow to face the left

side of the furnace (1/4turn), see Figure 14.

3. Turn assembly an additional 3/8turn to position inlet near the

bottom back corner of the gas valve in line with gas opening

on left side of furnace, see Figure 15.

Figure 13

25--23--23c

Elbows (N8MP)

Figure 14

25--23--21a

Gas Valve with Elbows (N8MP)

Figure 15

25--23--22

Gas Valve with Elbows (N8MP)

4. Gassupplylinethencanberundirectlyintoopeningofelbow.

Piping with Close Nipples and Standard Elbows

1. Assembleelbows and nipples similar tostreet elbows shown

in Figure 13.

2. Follow steps 2 through 4 Piping with Street Elbows.

FIRE HAZARD

Failure to follow safety warnings exactly could

result in serious injury, death, and/or property

damage.

Use wrench to hold furnace gas control valve when

turning elbows and gas line to prevent damage to

the gas control valve and furnace.

RNING

Left Side Gas Entry (*8MP) (See Figure 16)

Pipe can be run directly to gas valve through the hole provided in

the left side of the cabinet.

Right Side Gas Entry (*8MP) (See Figure 16)

Two (2) 90°street elbows or two (2) 90°standard elbows and two

(2) close nipples are required for right side gas supply,.

Typical Gas Piping (*8MP)

Figure 16

25--24--35a

441 01 2611 06

Piping with Street Elbows

1. Assembletheelbowssothattheoutletofone(1)elbowis90°

fromtheinletof theother.Theelbows shouldbetightenough

to be leak proof. An additional 1/4turn will be required at the

end of step 2, see Figure 13.

2. Screw elbow assembly into gas valve far enough to be leak

proof.Positionelbowassemblysothattheinletoftheelbowis

atthe bottomofthegasvalve.Anadditional1/2turnwillbere-

quired in step3. Turnopen end of inlet elbow toface the right

side of the furnace (1/4turn), see Figure 17.

Figure 17 Gas Valve with Elbows (*8MP)

25--22--25a--3

3. Turn assembly an additional 1/2turn to position inlet near the

top of the gas valve in line with gas opening on right side of

furnace, see Figure 18.

Figure 18 Gas Valve with Elbows (*8MP)

4. Gassupplylinethencanberundirectlyintoopeningofelbow.

Piping with Close Nipples and Standard Elbows

1. Assembleelbows and nipples similar tostreet elbows shown

in Figure 13.

2. Follow steps 2 through 4 Piping with Street Elbows.

FIRE OR EXPLOSION HAZARD.

Failureto properlyinstallmetalgas connectorcould

result in death, bodily injury and/or property

damage.

A flexible corrugated metal gas connector must be

properly installed, shall not extend through the side

of the furnace, and shall not be used inside the

furnace.

Black iron pipe shall be installed at the furnace gas

control valve and extend a minimum of 2²

²²

²outside

furnace.

!WARNING

Additional LP Piping Requirements

·Have a licensed LP gas dealer make all connections at stor-

age tank and check all connections from tank to furnace.

·If copper tubing is used, it MUST comply with limitation set in

Local Codes, orin the absence of local codes,the gas codes

of the country having jurisdiction.

·Two--stage regulation of LP gas is recommended.

FIRE OR EXPLOSION HAZARD.

A natural gas or LP gas leak ignited by an open

flame or spark could result in death, personal

injury and/or property damage.

Natural gas is lighter than air and will rise.

Liquefied petroleum (LP) gas is heavier than air

and will settle and remain in low areas and open

depressions.

Thoroughly ventilate area and dissipate gas. Do

NOT use a match or open flame to test for leaks,or

attempt to start up furnace before thoroughly

ventilating area.

RNING

Final Check

·Test all pipe for leaks.

·If orifices were changed, make sure they are checked for

leaks.

·During pressure testing of gas supply piping system:

a. If test pressure does not exceed 1/2²psi, isolate the

furnace from the gas supply piping system by closing the

equipment shutoff valve.

b.Iftestpressureexceeds1/2²psi,thefurnaceanditsmanual

equipment shutoff valve must be disconnected from the gas

supply piping system.

·To check for leaks apply soap suds or a liquid detergent to

each joint. Bubbles forming indicate a leak.

·Do not use an open flame to test forgas leaks. Fire or explo-

sion could occur.

·Correct even the smallest leak at once.

22 441 01 2611 06

9. Electrical Wiring

ELECTRICAL SHOCK HAZARD.

Failure to follow safety warnings exactly could

result in serious injury, death, and/or property

damage.

Turn OFF electrical power at fuse box or service

panel before making any electrical connections

and ensure a proper ground connection is made

before connecting line voltage.

!WARNING

Power Supply Wiring

The furnace MUST be electrically wired and grounded in accor-

dance with local codes, or in the absence of local codes, with the

NationalElectricalCode(NEC),ANSI/NFPA 70--2002 in theU.S.,

or the Canadian Electrical Code (CEC), CSA C22.1 in Canada.

The power supply to the furnace connections must be between

104 VAC and 127 VAC during furnace operation for acceptable

performance.

Fieldwiringconnectionsmustbemadeinsidethefurnaceconnec-

tion box. A suitable strain relief should be used at the point the

wires exit the furnace casing.

Copper conductors shall be used. Line voltage wires should

conform to temperature limitation of 63°F(35°C) rise. Wire and

circuitbreakersizingshallbebasedontheampacityofthefurnace

electrical components plus the amps for all installed accessories

(0.8 amps total for EAC and HUM). Ampacity can be determined

by using the NEC or CEC.

Furnace must be installed so the electrical components are pro-

tected from water and connected to its own separate circuit.

J-Box Relocation

N8MPN and N8MPL Models

TheJ--boxisinstalledinblowercompartmentonleftsideofcasing.

An alternate J--box location on right side can be used.

1. Remove bag containing two hole plugs and two self--tapping

screws from loose parts bag in blower compartment.

2. Remove and discard two screws holding J--box to casing.

3. Move large hole plug from right to left J--box location.

4. Move J--box to alternate location and attach using two self--

tapping screws from bag.

5. Apply two hole plugs from bag at left J--box location.

6. Position all wires away from sharp edges and moving parts.

Do not pinch J--box wires or other wires when reinstalling

blower compartment door.

*8MPN and *8MPL Models

The J--box is installed in the burner compartment on left side of

casing. An alternate J--box location on right side can be used:

1. Remove and save two screws holding J--box to casing.

2. Move large hole plug from right to left J--box location.

3. MoveJ--boxtoalternatelocationandattachusingtwoscrews

removed from left side location.

4. Position all wires away from hot surfaces, sharp edges, and

moving parts. Do not pinch J--box wires or other wires when

reinstalling burner compartment door.

Thermostat

Thermostatlocationhasanimportanteffectontheoperationofthe

furnace. Follow instructions included with thermostat for correct

mounting and wiring.

Low voltage connections to furnace must be made on terminal

board to fan control. (See Figure 19)

Ifcoolingisused,theYfromthethermostatmustbe connectedto

the control board Yto energize cooling blower speed.

Set thermostat heat anticipator in accordance with the Technical

Support Manual.

Optional Equipment

AllwiringfromfurnacetooptionalequipmentMUSTconformtolo-

calcodesor,intheabsenceoflocalcodes,theapplicablenational

codes. Install wiring in accordance with manufacturer’s instruc-

tions.

Humidifier/Electronic Air Cleaner

The furnace is wired for 115 VAC humidifier and/or electronic air

cleaner connection.

NOTE: Do NOT exceed 115V/0.8 amp. maximum current

load for both the EAC terminal and the HUM terminal

combined.

NOTE: The humidifier will be powered when the furnace is fired

andthecirculatingairblowercomeson.Theelectronicaircleaner

will be powered anytime the thermostat calls for air movement.

However, the electronic air cleaner is NOT energized during con-

tinuous fan operation controlled by the electronic fan control.

Figure 19 Electrical Connections

NOTE: 115 VAC/60Hz/single--phase

Operating voltage range*: 127 max, 104 min.

* Permissible limits of voltage at which unit will operate satisfactorily

115V. 60Hz.

Connection

Box

Ground

HOT

NEUT.

Thermostat

Low Voltage

Terminal Board

25--24--33--4

441 01 2611 06

Fan Control

ThefancontrolispresetatthefactorywithONdelayof30seconds

in the heating mode. The blower OFF timing is preset at 140 sec-

onds. If desired, the fanOFF delay can be resetto obtain the lon-

gest delay times while still maintaining comfort levels. See

“Furnace Wiring Diagram”.

Control Center Fuse

The 24V circuit contains a 5--amp, automotive--type fuse located

oncontrolcenter.(SeeFigure 20)Anyelectricalshortsof24Vwir-

ingduringinstallation,service,ormaintenancemaycausefuseto

blow. If fuse replacement is required, use only a fuse of identical

size (5 amp.).

Fan Timer Connections

Figure 20

DIP Switch

FUSE

25--23--41

10. Ductwork and Filter (Upflow/Horizontal)

CARBON MONOXIDE POISONING HAZARD.

Failure to properly seal duct could result in death

and/or personal injury.

DoNOT drawreturn air frominsidea closet orutility

room where furnace is located. Return air duct

MUST be sealed to furnace casing.

!WARNING

Duct Connections

This furnace may be installed in only a bottom or side return--air

duct application. Return air duct connections through the back of

the furnace is NOT permitted.

Upflow ONLY: Side return--air duct connections can be made by

cutting out the embossed area shown in Figure 21. A plugged

holeisprovidedateachfurnacesideductlocationtohelpstartcut-

tingtheopening. SideductconnectionsareNOTpermittedinhori-

zontal flow applications.

Cutting Side Return Air Opening

Figure 21

Plugged

Starting

Hole

Upflow and Horizontal Flow: Bottom return--air duct connec-

tions can be made by removing the knockout panel in thefurnace

base. Do NOT remove knock-out except for a bottom return--air

duct connection.

Duct Design

DesignandinstallairdistributionsystemtocomplywithAirCondi-

tioning Contractors of America manuals or other approved meth-

ods that conform to local codes and good trade practices.

Whenthefurnaceislocatedinanareanearoradjacenttotheliving

area,thesystemshouldbecarefullydesignedwithreturnstomini-

mize noise transmission through the return air grille. Any blower

movingahighvolumeofairwillproduceaudiblenoise,whichcould

beobjectionablewhenthefurnaceislocatedvery closetoaliving

area. It is often advisable to route the return air ducts under the

floor or through the attic.

·Refer to furnace Technical Support Manual (Blower Data)

for air flow information.

·Sizeductworktohandleairflowforheating(andaircondition-

ing if so equipped).

Duct Installation Requirements

·When a furnace is installed so that supply ducts carry air cir-

culated by the furnace to areas outside of the space contain-

ingthefurnace,thereturnairshallalsobehandledbyduct(s)

sealed to the furnace casing and terminating outside the

space containing the furnace.

CARBON MONOXIDE POISONING HAZARD.

Failure to follow safety warning exactly could

result in serious injury, death, and/or property

damage.

Install cooling coil on furnace discharge. Cool air

passing over heat exchanger could cause conden-

sate to form resulting in heat exchanger failure.

RNING

·Whenthefurnaceisusedwithacoolingunit,thefurnaceshall

beinstalledparallelwithorontheupstreamsideofthecooling

unit to avoid condensation in the heating element.

·Withaparallelflowarrangement,thedampersorothermeans

usedtocontrolflowofair shallbe adequatetopreventchilled

airfromenteringthefurnace.Chilledairgoingthroughthefur-

nace could cause condensation and shorten furnace life.

Dampers (purchased locally) can be either automatic or

manual. Manuallyorautomatically operateddampersMUST

be equipped with a means to prevent furnace and air condi-

tioningoperation,unlessdamperisinthefullheatorcoolposi-

tion.

24 441 01 2611 06

·Installation of locking-type dampers is recommended in all

branches,orinindividualductstobalancesystem’sairflows.

·Non--combustible, flexible duct connectors are recom-

mended for return and supply connections to furnace.

·Ifairreturngrilleislocatedclosetothefaninlet,installatleast

one 90°air turn between fan and inlet grille to reduce noise.

·Ductworkinstalledinatticorexposedtooutsidetemperatures

requiresaminimumof2²ofinsulationwithoutdoortypevapor

barrier.

·Ductworkinstalledinanindoorunconditionedspacerequires

a minimum of 1²of insulation with indoor type vapor barrier.

Inspection Panel on some models

Forafurnacenotequippedwitha coolingcoil,theoutletductshall

beprovidedwitharemovableaccesspanel. Thisopeningshallbe

accessiblewhenthefurnaceisinstalledandshallbeofsuchasize

thattheheatexchangercanbeviewedforpossibleopeningsusing

light assistance or a probe can be inserted for sampling the air

stream. This access cover shall be attached in such a manneras

to prevent air leaks.

Filters

A filter MUST be used.

Filtersarenotsuppliedwiththesefurnaces,butcanbepurchased

from your distributor.

See Table 4 for required high--velocity filter sizes.

Table 4 High--Velocity Air Filter Sizes (max. 600 FPM)

Cabinet Internal Filter External Filter Rack

Width Bottom Bottom Side+

151/214X25 14X25 14X25 or 16X25

191/216X25* 16X25* 16X25*

223/420X25* 20X25* 16X25*

* Greater than 1600 CFM requires both (left and right) side return filter

racks in upflow position.

+Sidereturnairduct(s)isnotpermittedwithhorizontalordownflowfurnace

installation.

Use either filter type:

·Washable,high--velocityfiltersarebasedonamaximumair

flow rating of 600 FPM.

·Disposable,lowvelocityfiltersarebasedonamaximumair

flow of 300 FPM when used with external filter grille.

RISK OF REDUCED FURNACE LIFE

Failure to follow these Caution may result in

premature furnace component failure.

Use of excessively dirty and/or restrictive air filters

may increase furnace operating temperatures and

shorten the life of the furnace.

Filters specified for the furnace are rated at a maximum

of 600 FPM air velocity and sized for the furnace’s

airflow rate. Replacement filters must be of equivalent

type, size, and rating except as described below.

Disposable, low--velocity filters may be used to replace

washable, high--velocity filters, providing they are sized

for 300 FPM or less.

UTION

·The furnaces with 1600 or less CFM rating use a 16” x 25”

high--velocity filter. On these models the filter may be

mounted internallyfor bottom return ora filter and rack may

be mounted externally for bottom return.

·The furnaces with greater than1600 CFMrequire that both

(left and right) side returns are used. Two side return filters

andracksarerequired.Filterracks mustbemountedexter-

nally. See Figure 24.

·If return air must be on one side only, an optional 20²x25²

filterstandoffrackkitcanbeused.(SeeFigure 22.)Forbot-

tomreturn,aninternalfiltercanbeusedorafilterrackkitcan

be mounted externally.

NOTE:The20²x25²standoffsidefilterrackgivesmorefilterarea

but does not provide more air. See Figure 22. To achieve 2000

CFM 2 side returns are still needed. See Figure 24.

NOTE: Disposable low--velocity filters may be replaced with

washable,high--velocityfilters.Washable,high--velocityfilterscan

bereplacedONLYwithsametypeandsizefilterunlesslow--veloc-

ity filters meet the minimum size areas for 300 FPM or less.

Figure 22 Optional Duct Standoff

20x25Optional

Filter Rack

Filter 25--23--05--4

Optional Filter Rack Installation: Side Return

Centerthefilterrackonthesidepanel,flushwiththebottomedge

of thefurnace. Mark the fastening holes. Drill the fastening holes

inthesidepanelandfastenthefilterrackinplacewithsheetmetal

screws. See Figure 23 and Figure 24.

441 01 2611 06

Figure 23 Side Return Filter Rack

Filter 25--23--05--4a

25--23--05--3

Filter Filter

Using Two

Filter Racks

Figure 24 Filters Installed on Two Sides

Internal Filter in Bottom-Return Installation

Wheninstallinga bottom--mountedfilterinside the furnace,install

thefilterclipsontheedgeofthebottomductopeningwiththewider

end of the clips toward the blower, as shown in Figure 25. Clips

may be obtained from your distributor or fabricated from sheet

metal (Figure 26). Insert filter into side clips first and push filter

back until it is fully engaged into back clip.

Center Clip

si de -- to -- side

Figure 25 Bottom Mounted Filter

25--24--18--1

9²

Figure 26 Filter Clip Construction

3²

11/4²

11/2²

11/16²

26 Ga. Galvanized Steel

NOTE: If filters are only suitable for heating application, advise

homeowner that filter size may need to be increased if air condi-

tioning is added.

Addition Of Air Conditioning

Whenarefrigerationcoilisusedinconjunctionwiththisfurnace,it

mustbeinstalledonthedischargesideofthefurnacetoavoidcon-

densationintheheatexchanger. Thecoilinstallationinstructions

must be consulted for proper coil location and installation proce-

dures. With a parallel flow arrangement, dampers must be

installedtopreventchilledairfromenteringthefurnace. Ifmanual-

ly operated dampers are used, they must be equipped with a

means to prevent operation of either unit unless the damper is in

full heat or full cool position.

Copperorplastictubingmaybeusedforthecondensatedrainline.

11. Ductwork and Filter (Downflow)

CARBON MONOXIDE POISONING HAZARD.

Failure to properly seal duct could result in death

and/or personal injury.

Do NOT draw return air from inside a closet or

utility room where furnace is located. Return air

duct MUST be sealed to furnace casing.

!WARNING FIRE HAZARD.

Failure to connect the return air duct to the top of a

downdlow furnace could result in death, bodily

injury, and/or property damage.

Side return air duct(s) may cause excessive furnace

and/orairtemperatures,whichcouldresult indeath,

bodily injury, and/or property damage.

Return air duct is to be connected to only the top of

downflow furnace.

RNING

26 441 01 2611 06

BURN HAZARD.

The vent may be hot. Failure to install vent shield

properly could result in bodily injury.

Install VENT PIPE SHIELD NAHA002VC as

described below.

!WARNING

Vent Shield

Ventshieldisrequiredforalldownflowinstallations.TheventMust

exit out the side of the furnace for all downflow installations. This

placesthehotventpipe(over300°F)withinreachofchildren.Vent

shieldattachestosideoffurnacetocoverventpipe.SeeFigure 5

in “2. Installation” section.

Outlet Duct Flange

Downflow installations with cased coils require the furnace outlet

ductflangetobebentoutwardandflattomatetheoutletofthefur-

nacetothecasedcoil.

FIRE HAZARD.

Failure to install furnace on noncombustible

subbasecouldresultin death,personalinjuryand/or

property damage.

Place furnace on noncombustible subbase on

downflow applications, unless installing on

non--combustible flooring.

!WARNING

Sub--Bases for Combustible Floors -- Furnace Only

Note: When using the subbase for combustible floors, the dis-

charge air duct flanges on the furnace MUST be broken down to

provide proper fit up to the subbase. Use duct pliers to bend the

duct flanges flat onto the furnace casing. DO NOT bend the duct

flanges inward (toward the heat exchangers) as air flow restric-

tions may occur.

The Subbase for Combustible Floors MUST be used when a

downflowfurnaceissetonacombustiblefloor,evenwhenthefur-

nace is installed on a coil box.

1. Cut the opening in the floor according to the dimensions in

Table 5 because the base isequipped with locating tabs that

center the base over the opening.

The opening in the base is 11/4²shorter and 11/8²narrower

than the minimum required size of the opening in the floor.

Thisisdonetomaintaina1²clearancebetweenthe floorand

the plenum.

2. Fabricate the plenum to the dimensions given in Table 5.

Note that the dimensions given are outside dimensions.

Table 5 Sub--bases for Combustible Floors Dimensions

Sub--base for

Combustible Floors Sub--base for Combustible

Floor Dimensions OpeningInFloor Opening In

Base For Plenum Typical Plenum

Dimensions

Part Number H*J* K** L M N P R S T

Subbase for Furnace Only

NAHH001SB 1511/16 283/4149/16 16 161/4145/815 131/215 131/2

NAHH002SB 195/16 283/4183/16 16 161/4181/415 171/815 171/8

NAHH003SB 2215/16 283/42113/16 16 161/4217/815 193/415 193/4

Subbase for Coil Box

NAHH004SB 1511/16 209/16 149/16 16 161/4145/815 131/215 131/2

NAHH005SB 195/16 209/16 183/16 16 161/4181/415 171/815 171/8

NAHH006SB 2215/16 209/16 2113/16 16 161/4217/815 193/415 193/4

*Outside Dimension

** Base Spacer Side To Side

3. Setthebaseovertheopeninginthefloor,centeringtheopen-

inginthebaseovertheopeninginthefloor.Fastenthebaseto

the floor with screws or nails. See Figure 27 and Figure 28.

4. Droptheplenumthrough theopening in thebase.Theflange

oftheplenumshouldrestontopofthecombustiblefloorbase.

441 01 2611 06

Exploded View of Sub--Base for

Furnace ONLY

Figure 27

Plenum

P1²

²²

2²

²²

Combustible

Floor Base

Hole in Floor

Setting the Base

Figure 28

Subbase

Insulation

Wood Screw Plenum

Furnace

Wood Floor

Sub--base for Combustible Floors -- Downflow Coil

Adapter Box

The subbase for combustible floors is required when a downflow

furnace, used with a downflow coil box, is set on combustible

flooring.

1. Cut the opening in the floor according to the dimensions in

Table 5 because the base isequipped with locating tabs that

center the base over the opening.

The opening in the base is 11/4²shorter and 11/8²narrower

than the minimum required size of the opening in the floor.

Thisisdoneto maintaina1”clearancebetweenthefloorand

the plenum.

2. Fabricate the plenum to the dimensions given in Table 5.

Note that the dimensions given are outside dimensions.

3. Setthebaseovertheopeninginthefloor,centeringtheopen-

ing in the base over the opening in the floor. Fasten the base

to the floor with screws or nails. See Figure 29 and

Figure 30.

4. Droptheplenumthrough theopeninginthebase. Theflange

oftheplenumshouldrestontopofthecombustiblefloorbase.

Exploded View of Sub--Base for

Downflow Cased Coil

Figure 29

Plenum

P1²

²²

2²

²²

Combustible

Floor Base

Hole in Floor

Setting the Base

Subbase

Insulation

Figure 30

Wood Screw Plenum

Coil Box

Wood Floor

Consideration must be given to the height of the base to allowfor

easy installation of the condensate drain. See Figure 31.This

subbase for combustible floors has been designed so that the

heightofthesubbaseraisesthedownflowcoiloffthefloortoallow

easy installation of the condensate drain.

Condensate Line Raised by Base

Figure 31

25--20--52

Non--Combustible Floor

Set the furnace over the opening in the floor. If necessary, grout

around the base to seal airleaks between the base and thefloor.

Duct Connections

Inthedownflowposition,thereturn--airductmustbeconnectedto

onlythetopofthefurnace. Topreturnconnectionscanbemadeby

28 441 01 2611 06

removing theknockout panel in thefurnace base. Return air con-

nectionthroughtheside(s)orbackofthe furnaceis NOT allowed.

Duct Design

DesignandinstallairdistributionsystemtocomplywithAirCondi-

tioning Contractors of America manuals or other approved meth-

ods that conform to local codes and good trade practices.

Whenthefurnaceislocatedinanareanearoradjacenttotheliving

area,thesystemshouldbecarefullydesignedwithreturnstomini-

mize noise transmission through the return air grille. Any blower

movingahighvolumeofairwillproduceaudiblenoise,whichcould

beobjectionablewhenthefurnaceislocatedvery closetoaliving

area. It is often advisable to route the return air ducts under the

floor or through the attic.

·RefertofurnaceTechnicalSupportManual(BlowerData)

for air flow information.

·Size ductwork to handle air flow for heating (and air condi-

tioning, if so equipped).

Duct Installation Requirements

·Whenafurnaceisinstalledsothatsupplyductscarryaircir-

culatedbythefurnacetoareasoutsideofthespacecontain-

ing the furnace, the return air shall also be handled by

duct(s)sealedtothefurnacecasingandterminatingoutside

the space containing the furnace.

CARBON MONOXIDE POISONING HAZARD.

Failure to follow safety warning exactly could

result in serious injury, death, and/or property

damage.

Install cooling coil on furnace discharge. Cool air

passing over heat exchanger could cause

condensate to form resulting in heat exchanger

failure.

!WARNING

·Whenafurnace isusedwithacoolingunit,thefurnaceshall

beinstalledparallelwithorontheupstreamsideofthecool-

ing unit to avoid condensation in the heating element.

·With a parallel flow arrangement, the dampers or other

means used to control flow of air shall be adequate to pre-

vent chilled air from entering the furnace. Chilled air going

throughthefurnacecouldcausecondensationandshorten

furnacelife. Dampers(purchasedlocally)canbeeitherau-

tomatic or manual. Manually or automatically operated

dampers MUST be equipped with a means to prevent fur-

naceand airconditioningoperation,unlessdamperisinthe

full heat or cool position.

·Installation oflocking--type dampers is recommended in all

branches, or in individual ducts to balance system’s air

flows.

·Non--combustible, flexible duct connectors are recom-

mended for return and supply connections to furnace.

·If air return grille is located close to the fan inlet, install at

least one 90°air turn between fan and inlet grille to reduce

noise.

·Ductwork installed in attic or exposed to outside tempera-

tures requires a minimum of 2²of insulation with outdoor

type vapor barrier.

·Ductwork installed in an indoor unconditioned space re-

quires a minimum of 1²of insulation with indoor type vapor

barrier.

Filters

A filter MUST be used.

Filtersarenotsuppliedwiththesefurnaces,butcanbepurchased

from your distributor.

See Table 6 for required high--velocity filter sizes.

Table 6 High Velocity Air Filter Sizes (max. 600 FPM)

Cabinet

Width Internal Filter External Filter Rack

151/2²

²²

²14²X25²14²X25²

191/8²

²²

²16²X25²16²X25²

223/4²

²²

²20²X25²20²X25²

Use either filter type:

·Washable,high--velocityfiltersarebasedonamaximumair

flow rating of 600 FPM.

·Disposable,lowvelocityfiltersare basedonamaximumair

flow of 300 FPM when used with external filter grille.

REDUCED FURNACE LIFE HAZARD

Failure to follow caution instructions may result in

reduced furnace life.

Use of excessively dirty and/or restrictive air filters

may increase furnace operating

temperatures and shorten the life of the furnace.

Filters supplied with the furnace are rated at a

maximum of 600 fpm air velocity and sized for the

furnace’s airflow rate. Replacement filters must be

of equivalent type, size, and rating except as

described below.

Disposable, low--velocity filters may be used to

replace washable, high--velocity filters, providing

they are sized for 300 FPM or less.

UTION

NOTE: Disposable, low--velocity filters may be replaced with

washable, high--velocity filters. Washable, high--velocity filters

canbereplacedONLYwithsametypeandsizefilters unlesslow--

velocity filters meet the minimumsize areas for 300 FPM or less.

Internal Filter in Top Return Installation

Wheninstallingtop--mountedfilterinsidethefurnace,installthefil-

ter clips on the edge of the top duct opening with the wider endof

the clips toward the blower as shown in Figure 32. Clips may be

obtained from your distributor or fabricated from sheet metal

(Figure 33). Insertfilterintosideclipsfirstandpushfilterbackuntil

it is fully engaged into back clip.

441 01 2611 06

Figure 32 Top Mounted Internal Filter

9²

Center Clip

si de -- to -- side

Figure 33 Filter Clip Construction

3²

11/4²

11/2²

11/16²

26 Ga. Galvanized Steel

NOTE: If filters are only suitable for heating application, ad-

visehomeownerthatfiltersizemay needtobeincreasedifair

conditioning is added.

Addition Of Air Conditioning

Whenarefrigerationcoilisusedinconjunctionwiththisfurnace,it

mustbeinstalledonthedischargesideofthefurnacetoavoidcon-

densationontheheatexchanger.Thecoilinstallationinstructions

must be consulted for proper coil location and installation

procedures. With a parallel flow arrangement, dampers must be

installedtopreventchilledairfromenteringthefurnace.Ifmanual-

ly operated dampers are used, they must be equipped with a

means to prevent operation of either unit unless the damper is in

full heat or full cool position.

Copperorplastictubingmaybeusedforthecondensatedrainline.

12. Checks and Adjustments

Startup

NOTE: Refer to startup procedures in the Users Information

Manual.

ELECTRICAL SHOCK, FIRE, OR EXPLOSION

HAZARD.

Failure to follow safety warnings exactly could

result in serious injury, death, and/or property

damage.

If any sparks, odors or unusual noises occur,

immediately shut OFF gas and power to furnace.

Check for wiring errors or obstruction to blower.

WARNING

Gas Supply Pressure

Gassupplypressureshouldbewithinminimumandmaximumval-

ueslistedonrating plate.Pressuresareusuallysetby gassuppli-

ers.

(See LP Gas Conversion Kit instruction manualfor furnaces con-

verted to LP gas.)

Manifold Gas Pressure Adjustment

NOTE: Make adjustment tomanifold pressurewith burners oper-

ating.

FIRE OR EXPLOSION HAZARD.

FailuretoturnOFFgasat shutoffbeforeconnecting

manometer could result in death and/or personal

injury.

Turn OFF gas at shut off before connecting

manometer.

RNING

1. With gas OFF, connect manometer to manifoldpressure tap

onoutletofgascontrolvalve.SeeFigure 34.Useamanome-

terwitha0²to 12²water column range.

Typical Gas Control Valve Honeywell

Figure 34

INLET

OUTLET

Diagnostic Light

(on some models)

25--22--25a

On/Off

Switch

Pilot Pressure

Adjustment

Manifold Pressure

Adjustment

(Hidden)

Manifold

Pressure

Tap

Supply Pressure

Tap (Hidden)

30 441 01 2611 06

2. Turn gas ON. Operate the furnace by using a jumper wire on

the R to W thermostat connections on the fan board.

3. Remove manifold pressure adjustment screw cover on fur-

nace gas control valve. Turn adjusting screw counterclock-

wise to decrease manifold pressure and clockwise to

increase pressure.

NOTE:AdjustmentscrewcoverMUSTbe replacedongascontrol

valve before reading manifold pressure and operating furnace.

4. Set manifold pressure to value shown in Table 7 or Table 8.

5. When the manifold pressure is properly set, replace the ad-

justment screw cover on the gas control valve.

6. Remove jumper wire from thermostat connection on fan

board. Remove manometer connection from manifold pres-

sure tap, and replace plug in manifold.

7. Check for leaks at plug.

Adjust Pilot Burner

The furnace has a pilot flame to light the main burner. The flame

shouldsurround3/8²to1/2²oftheflamerod.SeeFigure 35.To ad-

just, remove cap from pilot adjusting screw on gas control valve.

Turnscrewcounterclockwisetoincreaseorclockwisetodecrease

flame as required. Replace cap after adjusting screw.

Pilot Burner

Figure 35

Proper Flame

Adjustment

Flame Rod

Hot Surface

Igniter

1 0 -- 11 -- 6 5

Natural Gas Input Rating Check

The gas meter can be used to measure input to furnace.

Check with gas supplier for actual BTU content.

1. TurnOFFgassupplytoallappliancesotherthanfurnaceand

start furnace. Use jumper wire on R to W.

2. Time how many seconds it takes the smallest dial on the gas

meter to make one complete revolution.

Note: If meteruses a 2cubic foot dial, divide results (seconds) by

two.

Refer to Example. The Example is based on a natural gas BTU

content of 1,000 BTU’s per cubic foot.

Example

Natural Gas

BTU Content No. of Seconds

Per Hour

Time Per Cubic

Foot in

Seconds

BTU Per

Hour

1,000 3,600 48 75,000

1,000 x 3,600 ¸48 = 75,000 BTUH

3. Remove jumper wire from R to W1.

4. Relight all appliances and ensure all pilots are operating.

Orifice Sizing

NOTE: Factory sized orifices for natural and LP gas are listed in

the furnace Technical Support Manual.

Ensure furnace is equipped with the correctmain burner orifices.

Refer to Table 7 or Table 8 for correct orifice size and manifold

pressure for a given heating value and specific gravity for natural

and propane gas.

Operation Above 2000¢Altitude

FIRE, EXPLOSION, CARBON MONOXIDE

POISONING HAZARD.

Failure to follow these instructions exactly could

resultindeath,personalinjuryand/orpropertydam-

age.

This high--altitude gas--conversion shall be done by

a qualified service agency in accordance with the

Manufacturer’s instructions and all applicable

codes and requirements, or in the absence of local

codes, the applicable national codes.

RNING

Thesefurnacemaybeusedatfullinputratingwheninstalledatal-

titudesupto2000¢.Wheninstalledabove2000¢,theinputmustbe

decreased2%(natural)or4%(LP)foreach1000¢abovesealevel.

This may be accomplished by a simple adjustment of manifold

pressure or an orifice change, or a combination of a pressure ad-

justmentandanorificechange.The changesrequireddependon

theinstallationaltitudeandtheheatingvalueofthefuel.Table 7 &

Table 8 showtheproperfurnacemanifoldpressureandgasorifice

sizetoachieveproperperformancebasedonelevationabovesea

level for both natural gas and propane gas.

To use the natural gas table, first consult your local gas utility for

theheatingvalueofthegassupply.Selecttheheatingvalueinthe

firstcolumnandfollowacrossthetableuntiltheappropriateeleva-

tionfortheinstallationisreached.Thevalueintheboxattheinter-

section of the altitude and heating value provides not only the

manifoldpressurebutalsotheorificesize.Inthenaturalgastables

thefactoy--shippedorificesizeisinbold(42).Othersizes mustbe

obtained from service parts.

High Altitude Input Rate =

Nameplate Sea Level Input Rate x (Multiplier)

High Altitude Multiplier

Ele

ation Natural Gas LP Gas

2001¢- 3000¢0.95 0.90

3001¢- 4000¢0.93 0.86

4001¢- 5000¢0.91 0.82

5001¢- 6000¢0.89 0.78

6001¢- 7000¢0.87 0.74

7001¢- 8000¢0.85 0.70

*Based on mid--range of elevation.

441 01 2611 06

MANIFOLD PRESSURE AND ORIFICE SIZE FOR HIGH ALTITUDE APPLICATIONS

NATURAL GAS MANIFOLD PRESSURE (²

²²

²w.c.)

MEAN ELEVATION FEET ABOVE SEA LEVEL

HEATING

VALUE 0to

2000 2001 to

3000 3001 to

4000 4001 to

5000 5001 to

6000 6001 to

7000 7001 to

8000

at ALTITUDE

BTU/CU. FT. Orifice

No. Manifold

Pressure Orifice

No. Manifold

Pressure Orifice

No. Manifold

Pressure Orifice

No. Manifold

Pressure Orifice

No. Manifold

Pressure Orifice

No. Manifold

Pressure Orifice

No. Manifold

Pressure

700 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 41 3.7

725 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 41 3.7 41 3.4

750 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 41 3.5 42 3.6

775 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 41 3.6 42 3.6 42 3.3

800 -- -- -- -- -- -- -- -- -- -- -- -- 41 3.6 42 3.7 42 3.4 42 3.1

825 -- -- -- -- -- -- -- -- 41 3.7 41 3.4 42 3.5 42 3.2 42 2.9

850 -- -- -- -- -- -- -- -- 41 3.5 42 3.6 42 3.3 42 3.0 42 2.8

875 -- -- -- -- 41 3.6 42 3.6 42 3.4 42 3.1 42 2.8 42 2.6

900 -- -- -- -- 42 3.7 42 3.4 42 3.2 42 2.9 42 2.7 42 2.5

925 41 3.7 42 3.5 42 3.3 42 3.0 42 2.8 42 2.5 42 2.3

950 41 3.5 42 3.3 42 3.1 42 2.9 42 2.6 42 2.4 43 2.7

975 42 3.7 42 3.2 42 2.9 42 2.7 42 2.5 42 2.3 43 2.6

1000 42 3.5 42 3.0 42 2.8 42 2.6 42 2.4 43 2.7 43 2.4

1050 42 3.2 42 2.7 42 2.5 42 2.3 43 2.6 -- -- -- -- -- -- -- --

1100 42 2.9 42 2.5 42 2.3 43 2.6 -- -- -- -- -- -- -- -- -- -- -- --

NOTE: Natural gas data is based on 0.60 specific gravity. For fuels with different specific gravity consult the National Fuel Gas Code ANSI

Z223.1--2002/NFPA 54--2002 or National Standard of Canada, Natural Gas And Propane Installation Code CSA B149.1--00.

Table 8 LPG or PROPANE GAS MANIFOLD PRESSURE (²

²²

²w.c.)

HEATING VALUE MEAN ELEVATION FEET ABOVE SEA LEVEL

at ALTITUDE

BTU/CU. FT. 0to

2000 2001 to

3000 3001 to

4000 4001 to

5000 5001 to

6000 6001 to

7000 7001 to

8000

2500 10.0 10.0 9.0 10.0 9.4 8.5 10.0

Orifice Size #54 #54 #54 #55 #55 #55 #56

NOTE:Propanedataisbasedon1.53specificgravity. ForfuelswithdifferentspecificgravityconsulttheNationalFuelGasCodeANSIZ223.1--2002/NFPA

54--2002 or National Standard Of Canada, Natural Gas And Propane Installation Code CSA B149.1--00.

NOTE: The derating of these furnaces at 2% (Natural Gas) and

4% (Propane Gas) has beentested and design--certified by CSA.

High Altitude Air Pressure Switch

The factory--installed pressure switch need NOT be changed for

anyfurnaceinstallationsfromsealevelupto and including8,000¢

altitude

CARBON MONOXIDE POISONING HAZARD.

Failure to follow this warning could result in

property damage, personal injury and/or death.

NOx inserts foruse with Natural Gas units ONLY.If

LP Gas is required, NOx inserts must be

removed.

!WARNING

Changing Orifices

1. After disconnecting power and gas supply tothe furnace, re-

move the burner compartment door, exposing the burner

compartment.

2. Disconnect gas line and pilot tubing from gas valve so man-

ifold can be removed.

3. Disconnect wiring at gas valve. Be sure to note the proper

location of all electrical wiring before being disconnected.

Figure 36 Removing NOx inserts

25--40--03

4. Remove the four (4) screws holding the manifold and gas

valve to the manifold supports. Do not discard any screws.

See Figure 37.

5. Carefully remove the manifold assembly.

6. Remove the orificesfrom the manifold andreplace them with

proper sized orifices. See Figure 38.

7. Tighten orifices so they are seated and gas--tight. See

Figure 38.

32 441 01 2611 06

Figure 37 Manifold

25--23--51z

Some Models may vary

Figure 38 Clearances

Measure from face of orifice to the

back side of the manifold.

1.21²

1.11²

29.3 mm

+1.5

-- 1. 1

8. Reassembleallpartsinreverseorderasremoved.Besureto

engagethemainburnerorificesintheproperopenings inthe

burners.

9. After reassembling, turn gas on and check all joints for gas

leaks using a soapy solution. All leaks must be repaired im-

mediately.

Main Burner Flame Check

Allow the furnace to run approximately 10 minutes. Then inspect

the main burner and pilot flames. See Figure 39.

Check for the following:

·Stable and blue flames. Dust may cause orange tips or

wisps of yellow, but flames MUST NOT have solid, yellow

tips.

·Flamesextendingdirectlyfromburnerintoheatexchanger.

·Flames do NOT touch sides of heat exchanger

If any problems with mainburnerflames are noted, it may be nec-

essary to adjust gas pressures or check for drafts.

Main Burner

Burner Face

10--10--78

Figure 39

Air Temperature Rise Check

CAUTION

REDUCED FURNACE LIFE HAZARD

Failure to properly set the air temperature rise may

result in reduced furnace life.

“

”

Use ONLY the blower motor speed taps marked “Y” for

YES for setting air temperature rise.

Blower Motor Speed Taps for

N8MPN/L and *8MPN/L Model Sizes

Model Sizes LO

RED MLO

BLUE MHI

ORN HI

BLK

050B12 N Y Y N

075B12 N Y Y Y

075F16 N N Y Y

100F14 N N Y Y

100F20 N Y Y Y

100J20 N Y Y Y

100J22 Y Y Y N

125J20 N Y Y Y

125J22+ Y Y Y Y

150J20ÖN Y Y Y

+N8MPN only Ö*8MPN only

TheblowerspeedMUSTbesettogivethecorrectairtemperature

rise through the furnace as marked on the rating plate. Tempera-

ture rise is the difference between supply and return air tempera-

tures.

To check temperature rise, use the following procedure:

1. Placethermometersinsupplyandreturnairregistersasclose

to furnace as possible, avoiding direct radiant heat fromheat

exchangers.

2. Operatefurnacefor10minuteswithall theregistersandduct

dampers open by using a jumper wire on R to W thermostat

connections on the fan board.

3. Take readings and compare with range specified on rating

plate.

4. Ifthe airtemperatureriseisnotinthecorrectrange,theblow-

er speed must be changed. A higher blower speed will lower

the temperature rise. A lower blower speed will increase the

temperature rise.

5. Remove the jumper wire after theadjustments are complete.

441 01 2611 06

Changing Blower Speed

ELECTRICAL SHOCK HAZARD.

Failure to disconnect power could result in death,

personal injury and/or property damage.

Turn OFF power to furnace before changing speed

taps.

!WARNING

NOTE: The speed taps that the manufacturer sets at the factory

for this furnace are based on a nominal 400 CFM per ton cooling

and the basic mid range on the temperature rise for heating.

Since the manufacturer cannot predict the static pressure

thatwillbeappliedtothefurnace,itistheresponsibilityofthe

installer dealer/contractor to select the proper speed tap

leads for the application when the furnace is installed.

If it is necessary to change speeds, refer to steps below.

1. Refer to Furnace Wiring Diagram for location of the heating

and cooling speed taps located on the electronic fan control

as well as location of unused blower motor speed leads. Use

thechart(Table 9 ) todetermine the blower motor speed set-

tings.

Table 9 Blower Speed Chart

Wire Color Motor Speed

Black High

Orange*Med--High

Blue Med--Low

Red Low

*Med--High speed may not be provided on all models.

2. Changetheheatorcoolblowermotorspeedbyremovingthe

motor speed lead from the “Heat”or“Cool” terminal and re-

place it with the desired motor speed lead from the “Unused

Motor Lead” location. Connect the wire previously removed

from the “Heat”or“Cool” terminal to the vacated “Unused

Motor Lead” terminal.

3. Ifthesamespeedmustbeusedforbothheatingandcooling,

remove the undesired motor speed lead from the “Heat” or

“Cool”terminalandconnectthatleadtotheopenterminalat

“Unused Motor Lead” location or tape off. Attach a jumper

betweenthe“Heat”and“Cool” terminalsandtheremaining

motor speed lead.

Note: When using the same speed on motors with (4)speed

leads,itwillbenecessarytotapeofftheterminalof themotor

speedleadremovedfromthe“Heat” or“Cool” terminalwith

electrical tape since an open terminal will not be availableat

the “Unused Motor Lead” location.

Thoroughly check the system after modification to ensure the

properoperationofthecirculatingairblowerinallmodesofopera-

tion.

Continuous--Fan Operation

A terminal is provided on the electronic fan control located in the

circulating air blower compartment for operation of the continu-

ous--fanoption. Thisconnectionisintendedforthelowspeedmo-

tor tap, and has a lower contact rating (8 amps) than the heat and

cool taps. When the low speed blower lead is connected to this

terminal, this will provide low speed blower operation whenever

the other two speeds (Heat or Cool) are not energized.

Thoroughly check the system after modification to ensure the

properoperationofthecirculatingairblowerinallmodesofopera-

tion.

Separate speed selections for Heat, Cool, and

Continuous--Fan

Connect low speed lead from circulating air motor to the “Cont”

terminalattheelectronicfancontrol. Theappropriatemotorleads

shouldalreadybeconnectedtothe“Heat”and“Cool”terminals.

Heating and Continuous--Fan Speed the Same

Ifitisnecessarytooperatetheheatingspeedandcontinuous--fan

speed using the same blower speed, connect a jumper between

the “Heat” and “Cont” terminals on the electronic fan control.

Note: There should be only ONE motor lead going to the “Heat”

and “Cont” terminals.

13. Furnace Maintenance

FIRE, EXPLOSION, OR CARBON MONOXIDE

POISONING HAZARDS

Failure to have the furnace inspected and

maintained could result in death, bodily injury,

and/or property damage.

It is recommended that the furnace be inspected

and serviced on an annual basis (before the heating

season) by a qualified service agency.

!WARNING

See “User’s Information Manual”.

ELECTRICAL SHOCK, FIRE OR EXPLOSION

HAZARD

Failure to follow safety warnings exactly could

result in dangerous operation, serious injury,

death or property damage.

Improper servicing could result in dangerous

operation, serious injury, death or property

damage.

·Before servicing, disconnect all electrical

power to furnace.

·Whenservicingcontrols,labelallwiresprior to

disconnecting. Reconnect wires correctly.

·Verify proper operation after servicing.

RNING

34 441 01 2611 06

14. Sequence of Operation & Diagnostics

The following is the normal operating sequence.

Cooling (Y) Request:

24 VAC signals applied to Y & G terminals of EFT (electronic fan timer) control.

·Cool motor speed is energized after 5 second Cool Fan On Delay time.

Y & G signals removed from EFT.

·Cool motor speed is de--energized after 90 second Cool Fan Off Delay time.

Continuous Circulating Fan (G) Request:

24 VAC signals applied to G terminals of EFT control.

·Heat motor speed is energized without delay.

G signal removed from EFT.

·Heat motor speed is de--energized without delay.

NOTE 1) Furnace de--energizes the fan during the heat exchanger warm--up period on a call for Heating that occurs during a G

request unless a blower motor lead is connected to the Cont terminal on the EFT, in which case see NOTE 2).

NOTE 2) Heating or Cooling requests received during a Fan request cause the fan speed to change to the appropriate heat or cool

speed after the Fan On Delay time expires.The fan returns to continuous circulating speed after the selected Fan Off Delay time ex-

pires following loss of the Heating or Cooling request.

Heating (W) Request:

24 VAC signals applied to W terminal of EFT control.

·Inducer motor turns on.

·Followinga3secondprepurge delay, the pilot gas valve opens and the igniter begins to warm up.

·After the pilot lights, the gas control valve is energized and main burners light.

·Timed from the opening of the main gas control valve, the furnace control will delay blower operation for the Heat Fan On Delay

time. W signal removed from EFT.

·The gas valve de--energizes and the main burners go out.

·The inducer runs for a 30 second postpurge period.

·The fan stays at Heat speed.

·Timed from the gas valve de--energizing, the circulating fan de--energizes after the selected Heat Fan Delay time expires.

Heating Request with Gas Shut Off:

24 VAC signals applied to W1 terminal of EFT control.

·Inducer motor turns on.

·Followinga3secondprepurge delay, the pilot valve opens and the igniter begins to warm up.

·The igniter glows red--hot for 30 seconds, then turns off.

·The igniter stays off for 25 seconds, then begins to warm--up again.

·The igniter glows red--hot for 30 seconds, then turns off.

·The pilot valve closes 3 seconds after the igniter de--energizes.

·The inducer de--energizes 5 seconds after the pilot valve closes.

·The SmartValve proceeds to soft lockout and flashes error code 6.

·The control exits soft lockout after 5 minutes and begins another ignition sequence.

441 01 2611 06

Gas Control Valve Diagnostic Codes (See Figure 40)

OFF = Control not powered

Heartbeat = Normal Operation (Standby or call for heat)

1 Flash = Not used

2 Flashes = Low Pressure switch closed when should be open

3 Flashes = Low Pressureswitch circuit wasstill sensed as open 30seconds after the inducer was energized.System

is in 5 minute delay mode, with inducer off. After 5--minute delay, a new ignition sequence will be initiated.

(Note: SV9541M On/Off switch in off position during a call for heat will generate this diagnostic code)

4 Flashes = Limit switch string open

5 Flashes = Flame sensed out of sequence -- Flame signal still present.

6 Flashes + 1 Note 1 = Soft Lockout --Maximum retry count exceeded (failed to light within 4 trials for ignition)

6 Flashes + 2 Notes 1,2 = SoftLockout --Maximumrecyclecountexceeded -- LastfailurewasFlameSenseLostDuringRun,Cycling

Pressure Switch or Blocked Condensate.

6 Flashes + 3 Notes 1,2 = Soft Lockout --Maximum recycle count exceeded -- Last failure was Airflow Proving Circuit Opened

During Run

6 Flashes + 4 Notes 1,2 = Soft Lockout --Maximum recycle count exceeded -- Last failure was Limit Circuit Opened During Run

7 Flashes = Soft Lockout Due to Limit Trips Taking Longer than 2 minutes to Reset; Auto Reset After 1 Hour if

Call for Heat Still Present. Reset by Cycling Call for Heat at Any Time.

NOTE1:The6+Xdesignationindicatesacombinationofflashcodes:6flashesshowsthecontrolisinsoftlockout,followedbyXflashes

toindicatethereasonthecontrolwentintosoftlockout.Whenthe6+Xcodeisflashing,theSV9541willattemptanewignitionsequence

afterafiveminutedelayperiod,ifthecallforheatisstillpresent.Resetofthethermostatwillinitiatea newignitionsequenceimmediately.

NOTE 2: Any combination of 5 ‘abnormal’ events during a single call for heat will result in soft lockout. An ‘abnormal’ event is a Flame

SenseFailureDuringRun,AirflowProvingCircuitOpenDuringRun,orLimitCircuitOpenDuringRun.Theflash codewillindicatewhich

was the last ‘abnormal’ event that put the system into the soft lockout state based on the table above.

Typical Gas Control Valve Honeywell

Figure 40

INLET

OUTLET

Diagnostic Light

(on some models)

25--22--25a

On/Off

Switch

Pilot Pressure

Adjustment

Manifold Pressure

Adjustment

(Hidden)

Manifold

Pressure

Tap

Supply

Pressure

Tap (Hidden)

36 441 01 2611 06

441 01 2611 06

International Comfort Products, LLC

Lewisburg, TN 37091

Fast Parts Division

(866) 380--3278

Models

N8MPN050B12A1 N8MPL050B12A1

N8MPN075B12A1 N8MPL075B12A1

N8MPN075F16A1 N8MPL075F16A1

N8MPN100F14A1 N8MPL100F20A1

N8MPN100F20A1 N8MPL100J22A1

N8MPN100J22A1 N8MPL125J20A1

N8MPN125J20A1 N8MPL125J22A1

N8MPN125J22A1

*8MPN050B12A1 *8MPL050B12A1

*8MPN075B12A1 *8MPL075B12A1

*8MPN075F16A1 *8MPL075F16A1

*8MPN100F14A1 *8MPL100F20A1

*8MPN100F20A1 *8MPL100J20A1

*8MPN100J20A1 *8MPL125J20A1

*8MPN125J20A1

*8MPN150J20A1

* Denotes Brand

Save This Manual For Future Reference

38 441 01 2611 06

THIS DATA IS SUBJECT TO CHANGE WITHOUT NOTICE

Model Specifications

Manufacturers Number (Mfr No --SeeRatingPlate)

ALL Models (N8MPN) Specifications

N8MPN

050B12 N8MPN

075B12 N8MPN

075F16 N8MPN

100F14 N8MPN

100F20 N8MPN

100J22 N8MPN

125J20 N8MPN

125J22

General

Input (Btuh)

Output (Btuh)

Temp. Rise (°F)

50,000

40,000

35--65

75,000

60,000

35--65

75,000

60,000

25--55

100,000

80,000

30--60

100,000

80,000

35--65

100,000

81,000

30--60

125,000

100,000

30--60

125,000

100,000

30--60

Electrical (Volts/Hz) 115/60 115/60 115/60 115/60 115/60 115/60 115/60 115/60

Rating Plate Amps. 8.8 9.5 10.1 9.6 13.6 12.3 13.6 11.5

GasType Nat LP Nat LP Nat LP Nat LP Nat LP Nat LP Nat LP Nat LP

Transformer Size (VA)

T’stat Heat Anticipator 40

.10 40

.10

Gas & Ignition

Std. Main Orifices (No/Size) 2/#42 2/#54 3/#42 3/#54 3/#42 3/#54 4/#42 4/#54 4/#42 4/#54 4/#42 4/#54 5/#42 5/#54 5/#42 5/#54

Gas Valve Honeywell SV

Regulation Type

Manifold Press. (Inch’s WC)

9541

SNAP

3.5

9541

SNAP

10.0

9541

SNAP

3.5

9541

SNAP

10.0

9541

SNAP

3.5

9541

SNAP

10.0

9541

SNAP

3.5

9541

SNAP

10.0

9541

SNAP

3.5

9541

SNAP

10.0

9541

SNAP

3.5

9541

SNAP

10.0

9541

SNAP

3.5

9541

SNAP

10.0

9541

SNAP

3.5

9541

SNAP

10.0

Pilot Orifice Size .018 .011 .018 .011 .018 .011 .018 .011 .018 .011 .018 .011 .018 .011 .018 .011

Ignition Type/Series

Lock--Out Time HW HSP

NA HW HSP

Combustion

Flue OutletSize (Inches) 4444444 4

Limits & Controls

Thermal Sensor (°F)

Limit Control 300

See PartsList 300

See PartsList

Std. Pressure Sw. (Part No)

Press(Close)

Press(Open)

1013529

--0.69

--0.59

1013529

--0.69

--0.59

1013529

--0.69

--0.59

1013529

--0.69

--0.59

1013529

--0.69

--0.59

1013529

--0.69

--0.59

1013529

--0.69

--0.59

1013529

--0.69

--0.59

Fan Control (Type)

Fan Control On

(Timed--secs) Off

HW ST9160

60,100,140,180

HW ST9160

60,100,140,180

HW ST9160

60,100,140,180

HW ST9160

60,100,140,180

HW ST9160

60,100,140,180

HW ST9160

60,100,140,180

HW ST9160

60,100,140,180

HW ST9160

60,100,140,180

Blower Data

Type & Size

Motor Type/H.p.

Cap. Mfd/Volts

FilterType (600 FPM)

Filter Size (²) (Not Supplied)

1600 CFM and over#

Min. Cool Cap. (Tons)

Max. Cool Cap. (Tons)

11--8

PSC/1/2

10/370

Washable

14x25x1

-- --

1.5

11--8

PSC/1/2

7.5/370

Washable

14x25x1

-- --

1.5

11--10

PSC/1/2

10/370

Washable

16x25x1

16x25x1 (2)

11--10

PSC/1/2

7.5/370

Washable

16x25x1

-- --

3.5

11--10

PSC/1/2

10/370

Washable

16x25x1 (2)

11--10

PSC/3/4

40/370

Washable

20x25x1

16x25x1 (2)

5.5

11--10

PSC/1/2

10/370

Washable

20x25x1

16x25x1 (2)

11--10

PSC/3/4

40/370

Washable

20x25x1

16x25x1 (2)

5.5

Gas Conversion Kits

Nat to LP NAHL002LP or *1160991

LP to Nat NAHF002NG, *1009510

* Mustbe ordered from Service Parts

Note: Two side filter racks (left and right) required for upflow applications. Side returns are not permitted with downflow or horizontal furnace applica-

tions.

441 01 2611 06 THIS DATA IS SUBJECT TO CHANGE WITHOUT NOTICE

Manufacturers Number (Mfr No --SeeRatingPlate)

ALL Models (N8MPL) Specifications

N8MPL

050B12 N8MPL

075B12 N8MPL

075F16 N8MPL

100F20 N8MPL

100J22 N8MPL

125J20 N8MPL

125J22

General

Input (Btuh)

Output (Btuh)

Temp. Rise (°F)

50,000

40,000

35--65

75,000

60,000

35--65

75,000

60,000

25--55

100,000

80,000

35--65

100,000

80,000

30--60

125,000

100,000

30--60

125,000

100,000

30--60

Electrical (Volts/Hz) 115/60 115/60 115/60 115/60 115/60 115/60 115/60

Rating Plate Amps/ 8.8 9.5 10.1 13.6 12.3 13.6 11.5

GasType Nat LP Nat LP Nat LP Nat LP Nat LP Nat LP Nat LP

Transformer Size (VA)

T’stat Heat Anticipator 40

.10 40

.10

Gas & Ignition

Std. Main Orifices (No/Size) 2/#42 2/#54 3/#42 3/#54 3/#42 3/#54 4/#42 4/#54 4/#42 4/#54 5/#42 5/#54 5/#42 5/#54

Gas Valve Honeywell SV

Regulation Type

Manifold Press. (Inch’s WC)

9541

SNAP

3.5

9541

SNAP

10.0

9541

SNAP

3.5

9541

SNAP

10.0

9541

SNAP

3.5

9541

SNAP

10.0

9541

SNAP

3.5

9541

SNAP

10.0

9541

SNAP

3.5

9541

SNAP

10.0

9541

SNAP

3.5

9541

SNAP

10.0

9541

SNAP

3.5

9541

SNAP

10.0

Pilot Orifice Size .018 .011 .018 .011 .018 .011 .018 .011 .018 .011 .018 .011 .018 .011

Ignition Type/Series

Lock--Out Time HW HSP

NA HW HSP

Combustion

Flue OutletSize (Inches) 444444 4

Limits & Controls

Thermal Sensor (°F)

Limit Control 300

See PartsList 300

See PartsList

Std. Pressure Sw. (Part No)

Press(Close)

Press(Open)

1013529

--0.69

--0.59

1013529

--0.69

--0.59

1013529

--0.69

--0.59

1013529

--0.69

--0.59

1013529

--0.69

--0.59

1013529

--0.69

--0.59

1013529

--0.69

--0.59

Fan Control (Type)

Fan Control On

(Timed--secs) Off

HW ST9160

60,100,140,180

HW ST9160

60,100,140,180

HW ST9160

60,100,140,180

HW ST9160

60,100,140,180

HW ST9160

60,100,140,180

HW ST9160

60,100,140,180

HW ST9160

60,100,140,180

Blower Data

Type & Size

Motor Type/H.p.

Cap. Mfd/Volts

FilterType (600 FPM)

Filter Size (²) (Not Supplied)

1600 CFM and over #

Min. Cool Cap. (Tons)

Max. Cool Cap. (Tons)

11--8

PSC/1/2

10/370

Washable

14x25x1

-- --

1.5

11--8

PSC/1/2

7.5/370

Washable

14x25x1

-- --

1.5

11--10

PSC/1/2

10/370

Washable

16x25x1

16x25x1 (2)

11--10

PSC/1/2

10/370

Washable

16x25x1

16x25x1 (2)

11--10

PSC/3/4

40/370

Washable

20x25x1

16x25x1 (2)

5.5

11--10

PSC/1/2

10/370

Washable

20x25x1

16x25x1 (2)

11--10

PSC/3/4

40/370

Washable

20x25x1

16x25x1 (2)

5.5

Gas Conversion Kits

Nat to LP NAHL002LP or *1160991

LP to Nat NAHF002NG, *1009510

* Mustbe ordered from Service Parts

Note: Two side filter racks (left and right) required for upflow applications. Side returns are not permitted with downflow or horizontal furnace applica-

tions.

40 441 01 2611 06

THIS DATA IS SUBJECT TO CHANGE WITHOUT NOTICE

Manufacturers Number (Mfr No --SeeRatingPlate)

ALL Models (*8MPN) Specifications

*8MPN

050B12 *8MPN

075B12 *8MPN

075F16 *8MPN

100F14 *8MPN

100F20 *8MPN

100J20 *8MPN

125J20 *8MPN

150J20

General

Input (Btuh)

Output (Btuh)

Temp. Rise (°F)

50,000

40,000

35--65

75,000

60,000

30--60

75,000

60,000

30--60

100,000

81,000

35--65

100,000

81,000

35--65

100,000

81,000

35--65

125,000

101,000

35--65

150,000

121,000

35--65

Electrical (Volts/Hz) 115/60 115/60 115/60 115/60 115/60 115/60 115/60 115/60

Rating Plate Amps. 8.8 9.5 10.1 9.9 13.9 12.6 13.9 13.9

GasType Nat LP Nat LP Nat LP Nat LP Nat LP Nat LP Nat LP Nat LP

Transformer Size (VA)

T’stat Heat Anticipator 40

.30 40

.30

Gas & Ignition

Std. Main Orifices (No/Size) 2/#42 2/#54 3/#42 3/#54 3/#42 3/#54 4/#42 4/#54 4/#42 4/#54 4/#42 4/#54 5/#42 5/#54 6/#42 6/#54

Gas Valve Honeywell SV

Regulation Type

Manifold Press. (Inch’s WC)

9541

SNAP

3.5

9541

SNAP

10.0

9541

SNAP

3.5

9541

SNAP

10.0

9541

SNAP

3.5

9541

SNAP

10.0

9541

SNAP

3.5

9541

SNAP

10.0

9541

SNAP

3.5

9541

SNAP

10.0

9541

SNAP

3.5

9541

SNAP

10.0

9541

SNAP

3.5

9541

SNAP

10.0

9541

SNAP

3.5

9541

SNAP

10.0

Pilot Orifice Size .018 .011 .018 .011 .018 .011 .018 .011 .018 .011 .018 .011 .018 .011 .018 .011

Ignition Type/Series

Lock--Out Time HW HSP

NA HW HSP

Combustion

Flue OutletSize (Inches) 4444444 4

Limits & Controls

Thermal Sensor (°F)

Limit Control

Auxiliary Limit (°F)

300

See PartsList

130

300

See PartsList

130

300

See PartsList

130

300

See PartsList

130

300

See PartsList

130

300

See PartsList

130

300

See PartsList

130

300

See PartsList

130

Std. Pressure Sw. (Part No)

Press(Close)

Press(Open)

1013529

--0.69

--0.59

1013529

--0.69

--0.59

1013529

--0.69

--0.59

1013529

--0.69

--0.59

1013529

--0.69

--0.59

1013529

--0.69

--0.59

1013529

--0.69

--0.59

1013529

--0.69

--0.59

Fan Control (Type)

Fan Control On

(Timed--secs) Off

HW ST9160

60,100,140,180

HW ST9160

60,100,140,180

HW ST9160

60,100,140,180

HW ST9160

60,100,140,180

HW ST9160

60,100,140,180

HW ST9160

60,100,140,180

HW ST9160

60,100,140,180

HW ST9160

60,100,140,180

Blower Data

Type & Size

Motor Type/H.p.

Cap. Mfd/Volts

FilterType (600 FPM)

Filter Size (²) (Not Supplies)

1600 CFM and over#

Min. Cool Cap. (Tons)

Max. Cool Cap. (Tons)

11--8

PSC/1/2

10/370

Washable

14x25x1

-- --

1.5

11--8

PSC/1/2

7.5/370

Washable

14x25x1

-- --

1.5

11--10

PSC/1/2

10/370

Washable

16x25x1

16x25x1 (2)

11--10

PSC/1/2

7.5/370

Washable

16x25x1

-- --

3.5

11--10

PSC/1/2

10/370

Washable

16x25x1

16x25x1 (2)

11--10

PSC/1/2

10/370

Washable

20x25x1

16x25x1 (2)

11--10

PSC/1/2

10/370

Washable

20x25x1

16x25x1 (2)

12--12

PSC/3/4

40/370

Washable

20x25x1

16x25x1 (2)

Gas Conversion Kits

Nat to LP NAHL002LP or *1160991

LP to Nat NAHF002NG, *1009510

* Mustbe ordered from Service Parts

Note: Two side filter racks (left and right) required for upflow applications. Side returns are not permitted with downflow or horizontal furnace applica-

tions.

441 01 2611 06 THIS DATA IS SUBJECT TO CHANGE WITHOUT NOTICE

Manufacturers Number (Mfr No --SeeRatingPlate)

ALL Models (*8MPL) Specifications

*8MPL

050B12 *8MPL

075B12 *8MPL

075F16 *8MPL

100F20 *8MPL

100J20 *8MPL

125J20

General

Input (Btuh)

Output (Btuh)

Temp. Rise (°F)

50,000

40,000

35--65

75,000

60,000

30--60

75,000

60,000

30--60

100,000

81,000

35--65

100,000

81,000

35--65

125,000

101,000

35--65

Electrical (Volts/Hz) 115/60 115/60 115/60 115/60 115/60 115/60

Rating Plate Amps. 8.8 9.5 10.1 13.9 12.6 13.9

GasType Nat LP Nat LP Nat LP Nat LP Nat LP Nat LP

Transformer Size (VA)

T’stat Heat Anticipator 40

.30 40

.30

Gas & Ignition

Std. Main Orifices (No/Size) 2/#42 2/#54 3/#42 3/#54 3/#42 3/#54 4/#42 4/#54 4/#42 4/#54 5/#42 5/#54

Gas Valve Honeywell SV

Regulation Type

Manifold Press. (Inch’s WC)

9541

SNAP

3.5

9541

SNAP

10.0

9541

SNAP

3.5

9541

SNAP

10.0

9541

SNAP

3.5

9541

SNAP

10.0

9541

SNAP

3.5

9541

SNAP

10.0

9541

SNAP

3.5

9541

SNAP

10.0

9541

SNAP

3.5

9541

SNAP

10.0

Pilot Orifice Size .018 .011 .018 .011 .018 .011 .018 .011 .018 .011 .018 .011

Ignition Type/Series

Lock--Out Time HW HSP

NA HW HSP

Combustion

Flue OutletSize (Inches) 444444

Limits & Controls

Thermal Sensor (°F)

Limit Control

Auxiliary Limit (°F)

300

See PartsList

130

300

See PartsList

130

300

See PartsList

130

300

See PartsList

130

300

See PartsList

130

300

See PartsList

130

Std. Pressure Sw. (Part No)

Press(Close)

Press(Open)

1013529

--0.69

--0.59

1013529

--0.69

--0.59

1013529

--0.69

--0.59

1013529

--0.69

--0.59

1013529

--0.69

--0.59

1013529

--0.69

--0.59

Fan Control (Type)

Fan Control On delay

(Timed--secs) Off delay

HW ST9160

60,100,140,180

HW ST9160

60,100,140,180

HW ST9160

60,100,140,180

HW ST9160

60,100,140,180

HW ST9160

60,100,140,180

HW ST9160

60,100,140,180

Blower Data

Type & Size

Motor Amps/Rpm

Motor Type/H.p.

Cap. Mfd/Volts

Filter Type

Filter Size (²) (Not Supplied)

1600 CFM and over#

Min. Cool Cap. (Tons)

Max. Cool Cap. (Tons)

11--8

10.3/1100

PSC/1/2

10/370

Washable

14x25x1

-- --

1.5

11--8

8/1050

PSC/1/2

7.5/370

Washable

14x25x1

-- --

1.5

11--10

10.3/1100

PSC/1/2

10/370

Washable

16x25x1

16x25x1 (2)

11--10

10/1050

PSC/1/2

10/370

Washable

16x25x1

16x25x1 (2)

11--10

11.9/900

PSC/1/2

10/370

Washable

20x25x1

16x25x1 (2)

11--10

10/1050

PSC/1/2

10/370

Washable

20x25x1

16x25x1 (2)

Gas Conversion Kits

Nat to LP NAHL002LP or *1160991

LP to Nat NAHF002NG, *1009510

* Mustbe ordered from Service Parts

# Two side filter racks (left and right) required for upflow applications. Side returns are not permitted with downflow or horizontal furnace applications.

Exterrnal Static Pressure

Inches of W.C.

Exterrnal Static Pressure

Inches of W.C.

Exterrnal Static Pressure

Inches of W.C.

Exterrnal Static Pressure

Inches of W.C.

Exterrnal Static Pressure

Inches of W.C.

Exterrnal Static Pressure

Inches of W.C.

Exterrnal Static Pressure

Inches of W.C.

Exterrnal Static Pressure

Inches of W.C.

Exterrnal Static Pressure

Inches of W.C.

Exterrnal Static Pressure

Inches of W.C.

42 441 01 2611 06

THIS DATA IS SUBJECT TO CHANGE WITHOUT NOTICE

15. Circulation Air Blower Data

N8MPN/L050B12 & *8MPN/L050B12 * Denotes Brand

Air Delivery in Cubic Feet per Minute (C.F.M.)

(Furnace Rated @0.5²

²²

²WC ESP)

TAP LOW MED L MED H HIGH

.10 472 704 1167 1387

.30 365 638 1102 1288

.50 290 572 1035 1194

.70 209 522 939 1070

.90 463 443 820 937

1.00 413 370 753 858

N8MPN/L075B12 & *8MPN/L075B12 * Denotes Brand

Air Delivery in Cubic Feet per Minute (C.F.M.)

(Furnace Rated @0.5²

²²

²WC ESP)

TAP LOW MED L MED H HIGH

.10 695 963 1220 1559

.30 644 928 1183 1463

.50 588 873 1118 1361

.70 540 771 1017 1239

.90 463 675 900 1083

1.00 413 615 835 998

N8MPN/L075F16 & *8MPN/L075F16 * Denotes Brand

Air Delivery in Cubic Feet per Minute (C.F.M.)

(Furnace Rated @0.5²

²²

²WC ESP)

TAP LOW MED L MED H HIGH

.10 598 841 1427 1861

.30 400 748 1384 1770

.50 289 667 1343 1677

.70 236 582 1254 1547

.90 -- -- -- 477 1129 1360

1.00 -- -- -- 436 1016 1262

N8MPN100F14 & *8MPN100F14 * Denotes Brand

Air Delivery in Cubic Feet per Minute (C.F.M.)

(Furnace Rated @0.5²

²²

²WC ESP)

TAP LOW MED L MED H HIGH

.10 770 949 1328 1760

.30 648 873 1235 1675

.50 544 772 1115 1551

.70 457 684 1036 1404

.90 361 572 895 1215

1.00 308 507 811 1093

N8MPN/L100F20 & *8MPN/L100F20 * Denotes Brand

Air Delivery in Cubic Feet per Minute (C.F.M.)

(Furnace Rated @0.5²

²²

²WC ESP)

TAP LOW MED L MED H HIGH

.10 831 1125 1582 2216

.30 814 1123 1588 2179

.50 781 1117 1577 2074

.70 717 1053 1541 1909

.90 609 964 1373 1745

1.00 561 888 1307 1641

NOTE: 075F16 -- Reduce airflow by 5% if bottom return only

100F20 -- Reduce airflow by 10% if bottom return only

125J20 -- Reduce airflow by 5% if bottom return only

*8MPN/L100J20 * Denotes Brand

Air Delivery in Cubic Feet per Minute (C.F.M.)

(Furnace Rated @0.5²

²²

²WC ESP)

TAP LOW MED L MED H HIGH

.10 773 1045 1453 2147

.30 755 1037 1469 2128

.50 712 1020 1459 2078

.70 647 979 1424 1963

.90 554 894 1347 1795

1.00 497 828 1262 1705

N8MPN/L100J22

Air Delivery in Cubic Feet per Minute (C.F.M.)

(Furnace Rated @0.5²

²²

²WC ESP)

TAP LOW MED L MED H HIGH

.10 1785 1997 2292 2519

.30 1741 1941 2206 2410

.50 1674 1861 2097 2284

.70 1581 1749 1965 2121

.90 1428 1597 1793 1928

1.00 1326 1478 1667 1814

N8MPN/L125J20 & *8MPN/L125J20 * Denotes Brand

Air Delivery in Cubic Feet per Minute (C.F.M.)

(Furnace Rated @0.5²

²²

²WC ESP)

TAP LOW MED L MED H HIGH

.10 860 1149 1666 2147

.30 836 1158 1577 2126

.50 805 1140 1561 2148

.70 758 1081 1516 1922

.90 661 1009 1428 1767

1.00 614 925 1357 1663

N8MPN/L125J22

Air Delivery in Cubic Feet per Minute (C.F.M.)

(Furnace Rated @0.5²

²²

²WC ESP)

TAP LOW MED L MED H HIGH

.10 1901 2121 2362 2463

.30 1833 2033 2244 2385

.50 1745 1936 2100 2217

.70 1624 1773 1894 2033

.90 1442 1569 1714 1821

1.00 1329 1455 1583 1685

*8MPN150J20 * Denotes Brand

Air Delivery in Cubic Feet per Minute (C.F.M.)

(Furnace Rated @0.5²

²²

²WC ESP)

TAP LOW MED L MED H HIGH

.10 1656 1915 2168 2385

.30 1583 1787 2090 2335

.50 1507 1697 1997 2212

.70 1390 1596 1856 2085

.90 1212 1445 1654 1898

1.00 1125 1337 1561 1777

NOTE: N8MPN/L125J22 -- Reduce airflow by 10% if bottom return only

*8MPN/L150J20 -- Reduce airflow by 10% if bottom return only

441 01 2611 06

Wiring Diagram N8MPN/L, *8MPN/L

44 441 01 2611 06

Parts for N8MPN/L

25--24--32a--1

18 Z

J76

441 01 2611 06

Replacement Parts - N8MPN (Natural Gas)

Models -- N8MPN050B12A1, N8MPN075B12A1, N8MPN075F16A1, N8MPN100F14A1, N8MPN100F20A1, N8MPN100J22A1,

N8MPN125J20A1, N8MPN125J22A1

Replacement part supplied will be current active part. For parts not listed, consult place of purchase.

N8MPN

No.

escr

Functional Parts

art

Number 050B

12A1 075B

12A1 075F

16A1 100F

14A1 100F

20A1 100J

22A1 125J

20A1 125J

22A1

1Heat Exchanger 1013623

1013624

1013625

1013626

1013627

1013628

2Switch, Pressure 1013529 11111111

3Wheel, Blower 1013011

1011420 1

-- 1

-- --

1--

4Mount, Motor kit*1014824

1014823

1014822

5Mtr, Blor 1/115 1/2CCW

1/115 1/2CCW

1/115 3/4CCW

1172490

1172487

1172488

1172489

6Capacitor 1014397

1014396

1014395

7Transformer 1012722 11111111

8Control, Fan Timer 1014460 11111111

9Switch, Interlock 1012351 11111111

10 Burner Assembly 1008723

1008724

1008725

1008726

11 Pilot/Igniter 1008731 11111111

12 Ignitor/Sensor w/Clip 1009524 11111111

13 Orifice, Pilot .018 503211 11111111

14 Orifice, Burner # 42 1011351 23344455

15 Valve, Gas 1013350 11111111

16 Switch, Limit (Rollout) 1013102 22222222

17 Switch, Limit (Main) 1008417

1320362

34335000

18 Blower, Combustion 1014433 11111111

*See Table below for bellyband location on motor

Bellyband Location

on Motor

Model N8MPN A(in.)

050B12A1 1.38²

075B12A1 1.38²

075F16A1 1.38²

100F14A1 1.38²

100F20A1 1.81²

100J22A1 1.65²

125J20A1 1.81²

125J22A1 1.65²

46 441 01 2611 06

Replacement Parts - N8MPN (Natural Gas)

Models -- N8MPN050B12A1, N8MPN075B12A1, N8MPN075F16A1, N8MPN100F14A1, N8MPN100F20A1, N8MPN100J22A1,

N8MPN125J20A1, N8MPN125J22A1

Replacement part supplied will be current active part. For parts not listed, consult place of purchase.

N8MPN

No.

escr

Non-Functional Parts

art

Number 050B

12A1 075B

12A1 075F

16A1 100F

14A1 100F

20A1 100J

22A1 125J

20A1 125J

22A1

APanel, Top 1013995

1013996

1013997

BBox, Junction 1012349 11111111

CCover, Junction box 1012350 11111111

DPartition, Blower 1014009

1014010

1014011

EHousing, Blower 1012972

1012888 1

-- 1

-- --

1--

FHanger, Blower 1012328 22222222

GPanel, Blower Cutoff 721020013

721020008 1

-- 1

-- --

1--

HClamp, Capacitor 1170643

1014315 1

-- 1

-- --

JBracket, Control Mounting 1013677 11111111

KTube, Pilot 1014021

1014023

1014022

LDoor, Blower 1014380

1014381

1014382

MBracket, Door 1014271

1014272

1014273

NDoor, Louver 1014102

1014107

1014112

PManifold, Gas 1012787

1012788

1012789

1012790

RBracket, Pilot 1010901 11111111

SBracket, Manifold Support 1012377 22222222

TTop, Burner Box 1013702

1013703

1013704

UBracket, Burner Box Sides 1012532 22222222

VBaffle, Burner Box 1012338

1012339

1012340

WBottom, Burner Box 1012334

1012335

1012336

XCollector Box 1013010

1012735

1012736

1012739

1012738

1012740

ZGasket, Combustion Blower 1013540 11111111

441 01 2611 06

Replacement Parts - N8MPN (Natural Gas)

Models -- N8MPN050B12A1, N8MPN075B12A1, N8MPN075F16A1, N8MPN100F14A1, N8MPN100F20A1, N8MPN100J22A1,

N8MPN125J20A1, N8MPN125J22A1

Replacement part supplied will be current active part. For parts not listed, consult place of purchase.

N8MPN

No.

escr

Non-Functional Parts

art

Number 050B

12A1 075B

12A1 075F

16A1 100F

14A1 100F

20A1 100J

22A1 125J

20A1 125J

22A1

AA Partition, Frt Ht Exchanger 1013780

1013781

1013782

1013783

1013784

1013785

BB Gaskets, Heat Exchanger 1013991

1013992

1013993

1013994

CC Tubing, Silicone 1014519 11111111

)( Parts Not Illustrated

)( Fuse, 5 Amp 1083348 11111111

)( Harness, Wire 1013695 11111111

)( Door Screw 1014488 44444444

)( Door Screw Grommet 1171990 44444444

)( Manual, Installation & Tech 44101261105 11111111

)( Manual, Users 44102201004 11111111

48 441 01 2611 06

Replacement Parts - N8MPL (Natural Gas)

Models -- N8MPL050B12A1, N8MPL075B12A1, N8MPL075F16A1, N8MPL100F20A1, N8MPL100J22A1, N8MPL125J20A1,

N8MPL125J22A1

Replacement part supplied will be current active part. For parts not listed, consult place of purchase.

Descri

tion Part N8MPL

No.

Functional

Number 050B12A1 075B12A1 075F16A1 100F20A1 100J22A1 125J20A1 125J22A1

1Heat Exchanger 1014322

1014323

1014324

1014325

1014326

1014327

2Switch, Pressure 1013529 1 1 1 1 1 1 1

3Wheel, Blower 1013011

1011420 1

-- 1

-- --

1--

4Mount, Motor kit*1014824

1014823

1014822

5Mtr, Blower 1/115 1/2CCW

1/115 1/2CCW

1/115 3/4CCW

1172490

1172487

1172488

1172489

6Capacitor 1014397

1014396

1014395

7Transformer 1012722 1 1 1 1 1 1 1

8Control, Fan Timer 1014460 1 1 1 1 1 1 1

9Switch, Interlock 1012351 1 1 1 1 1 1 1

10 Burner Assembly 1008723

1008724

1008725

1008726

11 Pilot/Igniter 1008731 1 1 1 1 1 1 1

12 Ignitor/Sensor with Clip 1009524 1 1 1 1 1 1 1

13 Orifice, Pilot .018 503211 1 1 1 1 1 1 1

14 Orifice, Burner # 42 1011351 2 3 3 4 4 5 5

15 Valve, Gas 1013350 1 1 1 1 1 1 1

16 Switch, Limit (Rollout) 1013102 2 2 2 2 2 2 2

17 Switch, Limit (Main) 1008417

1320362

34335000

18 Blower, Combustion 1013517

1014433 --

1--

-- 1

*See Table below for bellyband location on motor

Bellyband Location

on Motor

Model N8MPL A(in.)

050B12A1 1.38²

075B12A1 1.38²

075F16A1 1.38²

100F20A1 1.81²

100J22A1 1.65²

125J20A1 181²

125J22A1 1.65²

441 01 2611 06

Replacement Parts - N8MPL (Natural Gas)

Models -- N8MPL050B12A1, N8MPL075B12A1, N8MPL075F16A1, N8MPL100F20A1, N8MPL100J20A1, N8MPL100J22A1,

N8MPL125J20A1, N8MPL125J22A1

Replacement part supplied will be current active part. For parts not listed, consult place of purchase.

N8MPL

No.

escr

Functional

art

Number 050B

12A1 075B

12A1 075F

16A1 100F

20A1 100J

22A1 125J

20A1 125J

22A1

APanel, Top 1013995

1013996

1013997

BBox, Junction 1012349 1 1 1 1 1 1 1

CCover, Junction box 1012350 1 1 1 1 1 1 1

DPartition, Blower 1014009

1014010

1014011

EHousing, Blower 1012972

1012888 1

-- 1

-- --

1--

FHanger, Blower 1012328 2 2 2 2 2 2 2

GPanel, Blower Cutoff 721020013

721020008 1

-- 1

-- --

1--

HClamp, Capacitor 1170643

1014315 1

-- 1

-- --

JBracket, Control Mounting 1013677 1 1 1 1 1 1 1

KTube, Pilot 1014021

1014023

1014022

LDoor, Blower 1014380

1014381

1014382

MBracket, Door 1014271

1014272

1014273

NDoor, Louver 1014102

1014107

1014112

PManifold, Gas 1012787

1012788

1012789

1012790

RBracket, Pilot 1010901 1 1 1 1 1 1 1

SBracket, Manifold Support 1012377 2 2 2 2 2 2 2

TTop, Burner Box 1013702

1013703

1013704

UBracket, Burner Box Sides 1012532 2 2 2 2 2 2 2

VBaffle, Burner Box 1012338

1012339

1012340

WBottom, Burner Box 1012334

1012335

1012336

XCollector Box 1013010

1012735

1012736

1012739

1012738

1012740

ZGasket, Combustion Blower 1013540 1 1 1 1 1 1 1

50 441 01 2611 06

Replacement Parts - N8MPL (Natural Gas)

Models -- N8MPL050B12A1, N8MPL075B12A1, N8MPL075F16A1, N8MPL100F20A1, N8MPL100J20A1, N8MPL100J22A1,

N8MPL125J20A1, N8MPL125J22A1

Replacement part supplied will be current active part. For parts not listed, consult place of purchase.

N8MPL

No.

escr

Functional

art

Number 050B

12A1 075B

12A1 075F

16A1 100F

20A1 100J

22A1 125J

20A1 125J

22A1

AA Partition, Frt Ht Exchanger 1013780

1013781

1013782

1013783

1013784

1013785

BB Gaskets, Heat Exchanger 1013991

1013992

1013993

1013994

CC Tubing, Silicone 1014519 1 1 1 1 1 1 1 1

DD Baffle, Nox 1014019 2 3 3 4 4 4 5 5

)( Part Not Illustrated

)( Fuse, 5 Amp 1083348 1 1 1 1 1 1 1 1

)( Harness, Wire 1013695 1 1 1 1 1 1 1 1

)( Door Screw 1014488 4 4 4 4 4 4 4 4

)( Door Screw Grommet 1171990 4 4 4 4 4 4 4 4

)( Manual, Installation & Tech 44101261105 1 1 1 1 1 1 1 1

)( Manual, Users 44102201004 1 1 1 1 1 1 1 1

441 01 2611 06

Parts for *8MPN/L

15 W

10 U

16 17

BB AA

UDD

25--23--49a

52 441 01 2611 06

Replacement Parts - *8MPN (Natural Gas)

Models -- *8MPN050B12A1, *8MPN075B12A1, *8MPN075F16A1, *8MPN100F14A1, *8MPN100F20A1, *8MPN100J20A1,

*8MPN125J20A1, *8MPN150J20A1

Replacement part supplied will be current active part. For parts not listed, consult place of purchase.

*8MPN

No.

escr

Functional

art

Number 050B

12A1 075B

12A1 075F

16A1 100F

14A1 100F

20A1 100J

20A1 125J

20A1 150J

20A1

1Heat Exchanger 1013551

1013519

1013550

1013552

1013553

1013554

1013555

2Switch, Pressure 1013529 11111111

3Wheel, Blower 1013011

1011420

1011433

4Mount, Motor kit*1014824

1014823

1014822

5Motor, Blr 1/115 1/2CCW

1/115 1/2CCW

1/115 3/4CCW

1172490

1172487

1172488

1172489

6Capacitor 1014397

1014396

1014395

7Transformer 1012722 11111111

8Control, Fan Timer 1014460 11111111

9Switch, Interlock 1012351 11111111

10 Burner Assembly 1008723

1008724

1008725

1008726

1009179

11 Pilot/Igniter 1008731 11111111

12 Ignitor/Sensor with Clip 1009524 11111111

13 Orifice, Pilot .018 503211 11111111

14 Orifice, Burner # 42 1011351 23344456

15 Valve, Gas 1013350 11111111

16 Switch, Limit (Rollout) 1013102 22222222

17 Switch, Limit (Main) 1320362

1065294

1008417

34335000

18 Blower, Combustion 1014433

1013517 1

-- 1

-- --

1--

*See Table below for bellyband location on motor

Bellyband Location

on Motor

Model *8MPN A(in.)

050B12A1 1.38²

075B12A1 1.38²

075F16A1 1.38²

100F14A1 1.38²

100F20A1 1.81²

100J20A1 1.81²

125J20A1 1.81²

150J20A1 1.65²

441 01 2611 06

Replacement Parts - *8MPN (Natural Gas)

Models -- *8MPN050B12A1, *8MPN075B12A1, *8MPN075F16A1, *8MPN100F14A1, *8MPN100F20A1, *8MPN100J20A1,

*8MPN125J20A1, *8MPN150J20A1

Replacement part supplied will be current active part. For parts not listed, consult place of purchase.

*8MPN

No.

escr

Functional

art

Number 050B

12A1 075B

12A1 075F

16A1 100F

14A1 100F

20A1 100J

20A1 *125J

20A1 150J

20A1

APanel, Top 1013982

1013983

1013984

BBox, Junction 1012349 11111111

CCover, Junction box 1012350 11111111

DPartition, Blower 1014009

1014010

1014011

1014013

EHousing, Blower 1012972

1012888

1012889

FHanger, Blower 1012328 22222222

GPanel, Blower Cutoff 721020013

721020008

721020015

HClamp, Capacitor 1170643

1014315 1

-- 1

-- --

1--

JBracket, Control Mounting 1013677 11111111

KTube, Pilot 1013596

1013597

1013598

1013599

LDoor, Blower (Heil/Arco)

(Heil/Arco)

(Comfortmaker Only)

(Tempstar Only)

1014001

1014375

1014376

1014079

1014349

1014352

1014058

1014068

1014073

MBracket, Door 1014271

1014272

1014273

1014274

NDoor, Louver (Heil/Arco)

(Heil/Arco)

(Comfortmaker Only)

(Tempstar Only)

1014088

1014091

1014094

1014078

1014081

1014085

1014057

1014067

1014072

PManifold, Gas 1013478

1013479

1013480

1013481

1013482

RBracket, Pilot 1010901 11111111

SBracket, Manifold Support 1012377 22222222

TTop, Burner Box 1013705

1013015

1013016

1013859

UBracket, Burner Box Sides 1012532 22222222

54 441 01 2611 06

Replacement Parts - *8MPN (Natural Gas)

Models -- *8MPN050B12A1, *8MPN075B12A1, *8MPN075F16A1, *8MPN100F14A1, *8MPN100F20A1, *8MPN100J20A1,

*8MPN125J20A1, *8MPN150J20A1

Replacement part supplied will be current active part. For parts not listed, consult place of purchase.

*8MPN

No.

escr

Functional

art

Number 050B

12A1 075B

12A1 075F

16A1 100F

14A1 100F

20A1 100J

20A1 *125J

20A1 150J

20A1

TTop, Burner Box 1013705

1013015

1013016

1013859

UBracket, Burner Box Sides 1012532 22222222

VBaffle, Burner Box 1012338

1012339

1012340

1013533

WBottom, Burner Box 1012334

1012335

1012336

1013691

XCollector Box 1014510

1014511

1014509

1014512

1013486

YRTV, Collector Box 11111111

ZGasket, Combustion Blower 1013540 11111111

AA Partition, Front Ht Exchanger 1013543

1013521

1013545

1013546

1013547

1013548

1013549

BB Gaskets, Heat Exchanger 1013991

1013992

1013993

1013994

1012546

CC Tubing, Silicone 1014520

1014521 1

-- 1

-- --

1--

)( PART NOT ILLUSTRATED

)( Fuse, 5 Amp 1083348 11111111

)( Harness, Wire 1013693 11111111

)( Door Screw 1014488 44444444

)( Door Screw Grommet 1171990 44444444

)( Manual, Installation & Tech 44101261105 11111111

)( Manual, Users 44102201004 11111111

441 01 2611 06

Replacement Parts - *8MPL (Natural Gas)

Models -- *8MPL050B12A1, *8MPL075B12A1, *8MPL075F16A1, *8MPL100F20A1, *8MPL100J20A1, *8MPL125J20A1

Replacement part supplied will be current active part. For parts not listed, consult place of purchase.

*8MPL

No.

escr

Functional

art

Number 050B

12A1 075B

12A1 075F

16A1 100F

20A1 100J

20A1 125J

20A1

1Heat Exchanger 1014316

1014317

1014318

1014319

1014320

1014321

2Switch, Pressure 1013529 1 1 1 1 1 1

3Wheel, Blower 1013011

1011420 1

-- 1

-- --

1--

4Mount, Motor kit*1014824

1014823

1014822

5Motor, Blower 1/115 1/2CCW

1/115 1/2CCW

1172490

1172487

1172488

6Capacitor 1014397

1014395 1

-- 1

-- --

1--

7Transformer 1012722 1 1 1 1 1 1

8Control, Fan Timer 1014460 1 1 1 1 1 1

9Switch, Interlock 1012351 1 1 1 1 1 1

10 Burner Assembly 1008723

1008724

1008725

1008726

11 Pilot/Igniter 1008731 1 1 1 1 1 1

12 Ignitor/Sensor with Clip 1009524 1 1 1 1 1 1

13 Orifice, Pilot .018 503211 1 1 1 1 1 1

14 Orifice, Burner # 42 1011351 2 3 3 4 4 5

15 Valve, Gas 1013350 1 1 1 1 1 1

16 Switch, Limit (Rollout) 1013102 2 2 2 2 2 2

17 Switch, Limit (Main) 1008417

1320362

1065294

18 Blower, Combustion 1014433

1013517 1

-- 1

-- --

*See Table below for bellyband location on motor

Bellyband Location

on Motor

Model *8MPL “A(in.)”

050B12A1 1.38²

075B12A1 1.38²

075F16A1 1.38²

100F20A1 1.81²

100J20A1 1.81²

125J20A1 1.81²

56 441 01 2611 06

Replacement Parts - *8MPL (Natural Gas)

Models -- *8MPL050B12A1, *8MPL075B12A1, *8MPL075F16A1, *8MPL100F20A1, *8MPL100J20A1, *8MPL125J20A1

Replacement part supplied will be current active part. For parts not listed, consult place of purchase.

*8MPL

No.

escr

Functional

art

Number 050B

12A1 *075B

12A1 075F

16A1 100F

20A1 100J

20A1 125J

20A1

APanel, Top 1013982

1013983

1013984

BBox, Junction 1012349 1 1 1 1 1 1

CCover, Junction box 1012350 1 1 1 1 1 1

DPartition, Blower 1014009

1014010

1014011

EHousing, Blower 1012972

1012888 1

-- 1

-- --

1--

FHanger, Blower 1012328 2 2 2 2 2 2

GPanel, Blower Cutoff 721020013

721020008 1

-- 1

-- --

1--

HClamp, Capacitor 1170643

1014315 1

-- 1

-- --

1--

JBracket, Control Mounting 1013677 1 1 1 1 1 1

KTube, Pilot 1013596

1013597

1013598

LDoor, Blower (Heil/Arco)

(Heil/Arco)

(Comfortmaker Only)

(Tempstar Only)

1014001

1014375

1014376

1014079

1014349

1014352

1014058

1014068

1014073

MBracket, Door 1014271

1014272

1014273

NDoor, Louver (Heil/Arco)

(Heil/Arco)

(Comfortmaker Only)

(Tempstar Only)

1014088

1014091

1014094

1014078

1014081

1014085

1014057

1014067

1014072

PManifold, Gas 1013478

1013479

1013480

1013481

RBracket, Pilot 1010901 1 1 1 1 1 1

SBracket, Manifold Support 1012377 2 2 2 2 2 2

TTop, Burner Box 1013705

1013015

1013016

UBracket, Burner Box Sides 1012532 2 2 2 2 2 2

VBaffle, Burner Box 1012338

1012339

1012340

WBottom, Burner Box 1012334

1012335

1012336

441 01 2611 06

Replacement Parts - *8MPL (Natural Gas)

Models -- *8MPL050B12A1, *8MPL075B12A1, *8MPL075F16A1, *8MPL100F20A1, *8MPL100J20A1, *8MPL125J20A1

Replacement part supplied will be current active part. For parts not listed, consult place of purchase.

*8MPL

No.

escr

Functional

art

Number 050B

12A1 *075B

12A1 075F

16A1 100F

20A1 100J

20A1 125J

20A1

XCollector Box 1014510

1014511

1014509

1014512

ZGasket, Combustion Blower 1013540 1 1 1 1 1 1

AA Partition, Front Ht Exchanger 1013543

1013521

1013545

1013546

1013547

1013548

BB Gaskets, Heat Exchanger 1013991

1013992

1013993

1013994

CC Tubing, Silicone 1014519 1 1 1 1 1 1

DD Baffle, Nox 1014019 2 3 3 4 4 5

)( PART NOT ILLUSTRATED

)( Fuse, 5 Amp 1083348 1 1 1 1 1 1

)( Harness, Wire 1013693 1 1 1 1 1 1

)( Door Screw 1014488 4 4 4 4 4 4

)( Door Screw Grommet 1171990 4 4 4 4 4 4

)( Manual, Installation & Tech 44101261105 1 1 1 1 1 1

)( Manual, Users 44102201004 1 1 1 1 1 1

N8MPN050B12B1 44101261106

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