Nordyne M1GH 056 Quick start guide

Downflow, Direct Vent (Sealed Combustion)

Forced Air Gas and Oil Furnaces

Installation Instructions/Owners Manual

Series M1B, M1G, M1M and M1S

For installation in:

1. Manufactured Homes

2. RecreationalVehicles,ParkModels,ManufacturedBuildings

3. Modular Homes/Buildings

LEAVE THESE INSTRUCTIONS WITH THE HOMEOWNER.

–Do not store or use gasoline or other flammable va-

pors and liquids in the vicinity of this or any other

appliance.

–WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any

phone in your building.

• Immediatelycallyourgassupplierfromaneighbor’s

phone. Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the fire

department.

–Installation and service must be performed by a

qualified installer, service agency or the gas supplier.

WARNING:

Iftheinformationinthismanualisnotfollowedexactly,

afireorexplosionmayresultcausingpropertydamage,

personal injury or loss of life.

Should overheating occur, or the gas supply fail to shut off, shut off the manual gas valve to the

appliance before shutting off the electrical supply.

WARNING:

Improper installation, adjustment, alteration, service or maintenance can cause injury or

property damage. Refer to this manual. For assistance or additional information consult a

qualified installer, service agency or the gas supplier.

WARNING:

Do not use this appliance if any part has been submerged under water. Immediately call a

qualified service technician to inspect the appliance and to replace any part of the control

system and any gas control that has been submerged underwater.

TABLE OF CONTENTS

1. SPECIFICATIONS ..........................................................................................................................................................................3

2. OWNERS INFORMATION ..............................................................................................................................................................4

3. MANUFACTURER WARRANTY, OWNER RESPONSIBILITY ......................................................................................................4

4. INSTALLATION STANDARDS .......................................................................................................................................................4

5. UNIT LOCATION ............................................................................................................................................................................5

6. MINIMUM CLEARANCES...............................................................................................................................................................5

7. RETURN AIR PROVISIONS ...........................................................................................................................................................5

8. AIR DISTRIBUTION SYSTEMS......................................................................................................................................................6

9. ROOF JACK SELECTION ..............................................................................................................................................................6

10. DUCT CONNECTOR SELECTION ................................................................................................................................................7

11. INSTALLATION ..............................................................................................................................................................................8

12. INSTALLATION OF TRANSIT-MODE VENTING SYSTEM .........................................................................................................11

13. ELECTRICAL WIRING .................................................................................................................................................................11

14. FUEL PIPING................................................................................................................................................................................12

15. FLUE GAS SAMPLING.................................................................................................................................................................14

16. LIGHTING AND FURNACE SHUT DOWN ...................................................................................................................................14

17. SERVICE GUIDE ..........................................................................................................................................................................18

18. MAINTENANCE ............................................................................................................................................................................22

19. OPTIONAL ACCESSORIES .........................................................................................................................................................23

20. WIRING DIAGRAMS................................................................................................................................................................24-26

21. EQUIVALENT ORIFICE SIZES AT HIGH ALTITUDES ................................................................................................................27

Table 1. Model Identification

Door Color

W - White

G - Gray

Cabinet Dimensions

A - 56" x 19-3/4" x 23-3/4”

B - w/Coil Cavity, 76" x 19-3/4" x 23-3/4"

Electrical Code

A - 1PH, 60 Hz, 120 VAC

Heating Capacity

Input, BTUH (000’)

Application

M-Manufactured Home

Furnace Series

Fuel, Type of Combustion

G-Gas, Direct Vent, Pilot Burner

Natural or Forced Draft

M-Gas, Direct Vent, HSI, Forced Draft

B-Gas, Direct Vent, Gun Burner

S-Oil, Direct Vent, Gun Burner

Comfort Model

H - Heating

A - Heating, A/C Ready

B - A/C Ready, 3 Ton

C - A/C Ready, 4 Ton

D - A/C Ready, 5 Ton

M 1 M B - 056 A - B W

Table 2. M1 Furnace Specifications

NOTICE TO INSTALLER

Installer is advised to follow carefully all instructions and

warnings in this manual to insure maximum performance,

safety,andoperatingefficiencyoftheseappliances.Improper

installation may create hazardous conditions, and will void

the appliance warranty.

1. SPECIFICATIONS

GENERAL DESCRIPTION

M1 Series gas and oil furnaces are listed direct vent (sealed

combustion),downflowheating appliancesformanufactured

(mobile)homes,recreationalvehicles,andforuseinresidential/

modular/commercialconstruction.Thefurnacemustbelocated

so that venting can be properly achieved.

“A”cabinetmodelsmaybeinstalledwithOptionalCoilCabinet

Model #911969 for air conditioning.

“B” cabinet models are factory equipped with a built-in coil cavity.

Multi-speed blower assemblies as shown in Table 3 have

beencertifiedforfieldinstallationinM1Seriesfurnaces.Anair

conditioner can be easily field installed with M1GH Series

furnacesifusedinconjunctionwithcertified2-wirerelaybox,

p/n 903092A or 4/5 wire relay box 902898A.

Electrical Supply - 120 volts, 60HZ, 1 Ph. Thermostat Circuit - 24 volts, 60HZ, 30 vac

Fuse or Breaker - 15 amps Normal Anticipator Setting - 0.4

Temperature Rise - 45° to 75°F Manifold Pressure - Natural Gas: 3.5” w.c. LP Gas: 10” w.c.

High Altitude - See Table 11. For Canadian High Altitude (2,000’ to 4,500’), reduce the gas manifold pressure

to 3.0” W.C. for natural gas and to 8” W.C. for LP gas.

*Blower capacity only - needs relay box for AC

Table 3. Field Installation Blower Assemblies

A/C Capacity

Blower Wheel Motor-Hp Ton

903412 10 x 8 1/3 2, 2½ & 3

903413 11 x 8 1/2 2, 2½, 3 & 4

903414 10 x 8 3/4 2, 2½, 3, 4 & 5

Part No. Blower / Motor Assembly

Furnace Input Output Orifice No E.S.P. Pilot Ignitor Comb. Motor A/C Ready

Model No MBtu/h MBtu/h Nat. LP In WC Burner Direct Blower Hp Tons

M1GH 056 56 45 29 45 0.2 x 1/8 2*

M1GB 056 56 45 29 45 0.3 x 1/3 3

M1GC 056 56 45 29 45 0.3 x 1/2 4

M1GD 056 56 45 29 45 0.3 x 3/4 5

M1GH 070 70 57 24 42 0.3 x 1/5 2½*

M1GB 070 70 57 24 42 0.3 x 1/3 3

M1GC 070 70 57 24 42 0.3 x 1/2 4

M1GD 070 70 57 24 42 0.3 x 3/4 5

M1GH 077 77 60 21 40 0.3 x x 1/4 3*

M1GB 077 77 60 21 40 0.3 x x 1/4 3

M1GC 077 77 60 21 40 0.3 x x 1/2 4

M1GD 077 77 60 21 40 0.3 x x 3/4 5

M1GH 090 90 70 17 36 0.3 x x 1/4 3*

M1GB 090 90 70 17 36 0.3 x x 1/4 3

M1GC 090 90 70 17 36 0.3 x x 1/2 4

M1GD 090 90 70 17 36 0.3 x x 3/4 5

M1MA 056 56 46 29 45 0.2 x x 1/8 2

M1MB 056 56 46 29 45 0.3 x x 1/3 3

M1MC 056 56 46 29 45 0.3 x x 1/2 4

M1MD 056 56 46 29 45 0.3 x x 3/4 5

M1MA 070 70 57 24 42 0.3 x x 1/5 2½

M1MB 070 70 57 24 42 0.3 x x 1/3 3

M1MC 070 70 57 24 42 0.3 x x 1/2 4

M1MD 070 70 57 24 42 0.3 x x 3/4 5

M1MB 077 77 62 21 40 0.3 x x 1/4 3

M1MC 077 77 62 21 40 0.3 x x 1/2 4

M1MD 077 77 62 21 40 0.3 x x 3/4 5

M1MB 090 90 72 17 36 0.3 x x 1/4 3

M1MC 090 90 72 17 36 0.3 x x 1/2 4

M1MD 090 90 72 17 36 0.3 x x 3/4 5

M1BA066 66 53 26 43 0.24 x x 1/5 2½

M1BC 066 66 53 26 43 0.3 x x 1/2 4

M1BB 086 86 68 18 37 0.3 x x 1/4 3

M1BC 086 86 68 18 37 0.3 x x 1/2 4

M1SA 066 66 54 .50 Gph 0.24 x Burner Model 1/5 2½

M1SC 066 66 54 .50 Gph 0.3 x AF-10 Nozzle 1/2 4

M1SB 086 86 71 .65 Gph 0.3 x Spray Angle 1/4 3

M1SC 086 86 71 .65 Gph 0.3 x 80° A 1/2 4

2. OWNER INFORMATION

ABOUT YOUR CENTRAL

FURNACE SYSTEM

NORDYNEhasbeeninvolvedinthedesignofproductsforthe

manufactured home industry since the first manufactured

home or trailer was built.

NORDYNE originated the sealed combustion system, which

separates the furnace combustion system from the living

areaofthehome,nowastandardforthemanufacturedhome

industry.

NORDYNE engineers developed the first central heating

system and the first central air conditioner for manufactured

homes.

NORDYNEisdedicatedtobringingtoitscustomersthefinest

heatingand coolingcomfort possible.NORDYNE constantly

seeks to further refine its products to continuously provide

exceptional comfort.

Follow the instructions in this booklet carefully and this

appliance will provide many years of superior performance.

If you wish to cool your home automatically with a central air

conditioning system investigate the excellent NORDYNE

cooling systems available from your heating and cooling

contractor. These systems are designed to work best with

yourNORDYNEfurnaceandhavebeencarefullyengineered

todeliveroptimumperformancewhenmatedwithNORDYNE

manufactured home furnaces.

NORDYNEalsoofferswaterheaters,fireplacesandventilating

systems specifically designed for manufactured housing

applications. Check with your manufactured home retailer,

your heating and cooling contractor or your distributor for

information. Write directly to the factory (PO Box 46911, St.

Louis, MO 63146) if you are not able to locate a source for

NORDYNE manufactured housing products in your area.

3. MANUFACTURER WARRANTY,

OWNER’S RESPONSIBILITIES

Itis the sole responsibilityof the homeowner to make certain

the gas furnace has been correctly set up and converted to

the proper fuel (L.P. gas or Natural gas) and adjusted to

operate properly. All gas furnaces are manufactured for

NaturalgasandmustbefieldconvertedwhenusingL.P.gas.

A warranty certificate with full details is included with these

instructions.However,NORDYNE willnotbe responsiblefor

any costs found necessary to correct problems due to

improper setup, improper installation, furnace adjustments,

improper operating procedure on the part of the user, etc.

Some specific examples of service calls which cannot be

included in warranty payments are:

1. Converting the furnace to use another type of gas.

2. Repairing duct work in the home found to be faulty.

3. Correctingwiringproblemsintheelectricalcircuitsupplying

the furnace.

4. Resettingcircuitbreakers,blownfusesorotherswitches.

5. Correctingproblemsduetoimpropergassupplypressure

to the furnace.

6. Providinginstructionaltrainingonhowtolightandoperate

the furnace.

7. Furnace problems caused by installation of an air

conditioner, heat pump or other air comfort devices.

8. Adding a Roof Jack extension because of unusual wind

and/or snow conditions.

9. Revising installation of the furnace flue assembly (Roof

Jack).

10. Adjusting or calibrating of thermostat.

11. Any construction debris which falls into flue system.

Carefullyreviewtheseresponsibilitieswithyourmanufactured

housingdealer,servicecompanyorgassuppliersotherewill

be no misunderstanding at a later time.

4. INSTALLATION STANDARDS

Installer shall be familiar with and comply with all codes and

regulations applicable to the installation of these heating

appliances and related equipment. In lieu of local codes, the

installationshall be inaccordance withthe currentprovisions

of one or more of the following standards.

a. Federal Manufactured Home Constructions & Safety

Standard (H.U.D. Title 24, Part 3280.707[a][2])

b. American National Standard (ANSI-119.2/NFPA-

501C) for all recreational vehicle installations.

c. AmericanNationalStandard(ANSI-Z223.1/NFPA-54)

and/orCAN/CGAB149forallgas-firedfurnacemodels.

d. American National Standard (ANSI-Z95.1/NFPA-31)

and/or CSA B139 for all oil-fired furnace models.

e. AmericanNationalStandard(ANSI-C1/NFPA-70)and/

or CSA 22.1 Canadian Electric Code Part 1 for all

electrical field wiring.

f. Units have been investigated under standards UL

307A&B,ANZI21.47a — CAN/2.3a - 1995,andCSA

B140.10.

CAUTION:

• Neverattemptto alteror modifythis furnaceor

any of its components.

• Neverattempttorepairdamagedorinoperable

components. Such action could cause unsafe

operation, explosion, fire and/or asphyxiation.

• Ifamalfunctionhasoccurred,orifyoufeelthat

thefurnaceisnotoperatingasitshould,contact

a qualified service agency or gas utility for

assistance.

5. UNIT LOCATION

The furnace shall be appropriately located to the supply and

return air distribution system. (See “AIR DISTRIBUTION”,

Page 7) Sides and back of the furnace may be enclosed by

wall framing. (See “Minimum Clearances,” Table 4, and

Figures 2 through 5.)

The furnace installation is only intended for free air return

throughthefurnace doorlouvers. DONOT connect aducted

returnairsystemdirectlytothefurnace.Improperinstallation

maycreateahazardanddamageequipment,aswellas void

all warranties.

Furnace may be installed on combustible flooring when using

NORDYNE Duct Connectors (see Table 7 and Figures 9-16).

6. MINIMUM CLEARANCES

This heating appliance must be installed with clearances not

less than the minimums shown in Table 4. This heating

appliance must be installed with ample clearance for easy

access to the air filter, blower assembly, burner assembly,

controls, and vent connections.

a. Alcove installations (see Figure 2): minimum 18"

clearanceatfrontoffurnaceshallbeprovidedforfuture

servicing.Aremovableaccesspanelshouldbeinstalled

between top of the furnace door frame and the ceiling.

b. Closetinstallationsmustusealouvereddoorhavinga

minimumfreeareaof235sq.in.whenlocated6"from

furnace(SeeFigure3).Forspecialclearancebetween

1" and 6", requirements are a louvered door with a

minimumof250 sq.in.free area,with the openingsin

theclosetdoordirectlyinlinewiththelouveredopenings

in the furnace door . A fully louvered closet door may

be used (See Figure 4).

Figure 1. Overall Dimensions

“A”- 56"

23 3/4"

“B”- 76"

19 3/4"

“A” Model-

w/o Coil Cabinet

“B” Model-

w/Coil Cabinet

Table 4. Minimum Clearances

7. RETURN AIR PROVISIONS

U.S.A. home manufacturers shall comply with all of the

followingconditionstohave acceptablereturnairsystemsfor

closet installed forced air heating appliances:

a. Regardlessofthelocation,thereturnairopeninginto

the closet shall not be less than specified in the

appliance’slisting.

b. Meansshallbeprovidedtopreventinadvertentclosure

by a flat object placed over the return air opening

whenit is located in the floor of thecloset (versus the

vertical front or side wall).

c. The cross-sectional area of the return duct system

leading into the closet, when located in the floor or

ceiling shall not be less than 235 square inches (or

390 square inches for 5 ton ready M1 Furnaces).

d. The total free area of openings in the floor or ceiling

registers serving the return air duct system must be

at least 352 sq. in. At least one register should be

locatedwhereitisnotlikelytobecoveredbycarpeting,

boxes and other objects.

e. Materialslocatedinthereturnductsystemmusthave

a flame spread classification of 200 or less. This

includes a closet door if the furnace is in a closet.

f. Noncombustiblepanshaving1"upturnedflangesare

located beneath openings in a floor duct system.

g. Wiring materials located in the return duct system

shall conform to Articles 300-22 of the National

Electrical Code (ANSI C1/NFPA-70).

h. Gas piping is not run in or through the return duct

system.

i. Test the negative pressure in the closet with the air-

circulatingfanoperatingathighspeed andthecloset

closed. The negative pressure is to be no more

negative than minus 0.05 inch water column.

CAUTION:

HAZARD OF ASPHYXIATION: Negative

pressure inside the closet, with closet door

closed and the furnace blower operating on

high speed, shall be no more negative than

minus 0.05 inch water column.

ALL MODELS CLOSET ALCOVE

Front 6" 18"

Back 0" 0"

Sides 0" 0"

Roof Jack 0" 0"

Top 6" 6"

Top and Sides of Duct 0" 0"

Bottom of Duct

B Cabinet 0" 0"

A Cabinet (w/ coil box) 0" 0"

A Cabinet (w/o coil box) 1/4" 1/4"

Provide removable

access panel above

furnace door frame to

access roof jack

Nearest

Wall or

Partition

18"

(457 mm)

6" (152 mm)

Top Clearance

0" Side

Clearance

to Furnace

Cabinet

6" (152 mm)

Top Clearance

0" Side

Clearance

to Furnace

Cabinet

Provide min. 235

sq. in. (1516 cm )

open free area in

front or side wall

In closet

door

located

at top,

center

or bottom

CLOSET DOOR

6" (152 mm)

Top Clearance

Provide min. 250

sq. in. (1613 cm )

open free area in

front or side wall

A fully

louvered

door may

be used

CLOSET DOOR

(152 mm)

(25 mm)

0" Side

Clearance

to Furnace

Cabinet

Figure 2. Alcove Installation

Figure 3. Closet Installation

Figure 4. Special 1" Clearance

j. For floor return systems, the manufactured home

manufacturer shall affix a prominent marking on or

near the appliance where it can be easily read when

the closet door is open. The marking shall read:

k. Air conditioning systems may require more duct,

airflow. Use NORDYNE’s certiduct program to

determine proper duct size for A/C.

8. AIR DISTRIBUTION SYSTEMS

For proper air distribution, the supply duct system must be

designedsothatthestaticpressuremeasuredexternaltothe

furnace does not exceed the listed static pressure rating

shown on the furnace rating plate.

Three typical distribution systems are illustrated in Figure 5.

Figure 5. Typical Supply Duct System

Location, size, and number of registers should be selected

onthebasisofbestairdistributionandfloorplanofthehome.

9. ROOF JACK SELECTION

Note: Install only Roof Jack Assemblies listed in Table 5 on

this heating appliance.

a. Determine depth of ceiling cavity from center of roof

openingtocenterofceilingopening.(SeeDimension

“A” in Figure 6.)

b. Determineceilingheightandsubtractheightoffurnace.

(See Dimension “B” in Figure 6.)

c. AdddimensionsA+B(andXfromTable6andFigure

7if slant deckflashing isused). Thetotal lengthof (A

+ B + X) must be within the minimum and maximum

range of one of the Roof Jacks listed in Table 5.

A Single trunk duct

BDual trunk duct

w/crossover connector

CTransition duct

w/branches

CAUTION:

HAZARDOFASPHYXIATION:Donotcoveror

restrict return air opening.

APPLICATION NOTES:

a. FAW,FAWT,SAWandSAWTSeriesRoofJackswith

a 5" diameter inner vent pipe may be used with all

models of M1 Series gas and oil furnaces.

b. F=Flat Flashing; flexes from 0/12 to 1/12 roof slope.

c. S=Slant Flashing. 2.5/12 Slope flexes from 1/12 to

4/12 roof slope, 4/12 flexes from 3/12 to 5/12.

d. Stainless steel roof jacks are available.

e. Iftheroofjackcrowniscoveredorblockedwithsnow,

the furnace will not operate properly. If the home is

locatedinregionswheresnowaccumulationexceeds

7” (HUD snowload zones) use an external roof jack

extension p/n 901937.

f. M1furnacesmaybeusedwithroofjacksastallas170”

(except M1M 056 & M1B 066 models, which are

limited to 120”). An internal roof jack extension (p/n

901935 - 10”, p/n 903107 - 18”) can be used to

increase roof jack height. All connections inside the

home must be made below the ceiling.

These extensions are available as optional accessories and

may be purchased through your NORDYNE distributor. Figure 6. Roof Jack Assemblies

Figure 7.

Figure 8.

Roof Jack

Flat Roof

Ceiling Cavity

Ceiling

Flue Pipe

Combustion

Air Pipe

Flashing

This joint

may be

above ceiling

"A"

"B"

56" or 76"

Furnace

5/12 ROOF SLOPE

SLANT DECK

/12

ROOF JACK WITH

FLASHING

/12 SLANT

SSAW T20 32 - 2

AW= ALL WEATHER

FLASHING

PITCH/12" RISE

0=FLAT

2=2.5/12

4=4/12

MIN. ADJ.

LENGTH

S= FLAT FLASHING

SLANT FLASHING TYPE:

BLANK=NON-TRANSIT

T= TRANSIT MODE MAX. ADJ.

LENGTH

FLUE STEEL TYPE

A= ALUMINIZED

S=STAINLESS

S O T 27 45 -5

S= SLAT FLASHING

F= FLAT FLASHING

O= TYPE; STANDARD

H= HIGH WIND

A= ARCTIC ROOF JACK

T= TRANSIT

MODE

TYPE

MIN. ADJ.

LENGTH

MAX. ADJ.

LENGTH

5 = 5" FLUE DIA.

Table 5b. Roof Jack Assemblies

MODEL APPROX. ADJ.

NUMBER LENGTHS*

BELOW FLASHING

FO1323 -5 13" - 23"

FO2343 -5 23" - 43"

SO1835 -5 18" - 35"

SO2447 -5 24" - 47"

SO3263 -5 32" -63"

SO4895 -5 48" - 95"

SOT2442 -5 24" - 42"

SOT2745 -5 27" - 45"

SOT4581 -5 45" - 81"

FOT2846 -5 28" - 46"

10. DUCT CONNECTOR SELECTION

a. Determinedepthoffloorcavityfromsurfaceoffloorto

top of supply air duct (See Figure 9).

b. SelectappropriatemodelfromTable7whichmatches

X-dimensionofthefloorcavity.Tomaximizeairdelivery,

remove reducer “C” (see Figure 11) to obtain the

largestopenareathatwillfittheduct/floorconstruction.

Figure 5a. All Weather Roof Jack Assemblies

ROOF JACK

SLANT DECK

FLASHING

PITCHED

ROOF

CEILING

CEILING CAVITY

ROOF OPENING

CEILING OPENING

"X" (SEE TABLE 1)

Approx. Length

Model Number Below Flashing

(F,S)AW(T)1523-(0,2,4)(A,S) 15" - 23"

(F,S)AW(T)2135-(0,2,4)(A,S) 21" - 35"

(F,S)AW(T)2747-(0,2,4)(A,S) 27" - 47"

(F,S)AW(T)3563-(0,2,4)(A,S) 35" - 63"

(F,S)AW(T)5195-(0,2,4)(A,S) 51" - 95"

Figure 10.

Figure 9.

Table 6. Optional Slant Deck Flashings

Figure 11.

Table 7. Duct Connectors

11. INSTALLATION

Required floor, ceiling, and roof cut-out openings must be

carefully located to avoid misalignment of the furnace and

RoofJack (see Figures12 &13). Installationprocedures are

suggested for typical furnace installations and need not be

followed in the exact listed sequence.

CUT OUT FLOOR OPENING & FUEL LINE HOLE

a. Determine center of closet or alcove (Figure 13).

b. Locatecenteroftheflooropening,measured10"from

the rear wall, and mark cut-out measuring

approximately14-1/2"by14-1/2"(±1”)formodelduct

connector used (refer to Figures 10 & 11).

c. Locatecenteroffuellinehole,measured23-1/4"from

therearwalland6-5/8"totheleftofcenterofthefloor

cut-out(SeeFigure12)or5-1/4"totheleftofcenterof

the floor cut-out, or for entry through right-side of

furnace measured 9" to the right of center of the floor

cut-out.

d. Cut out floor opening and one fuel line hole.

CUT OUT CEILING AND ROOF OPENINGS

a. Locate center of Roof Jack opening, measured

13 1/2" from the rear wall of closet or alcove along the

centerlineoffurnaceandflooropening.(SeeFigure13)

b. Cut ceiling and roof holes as follows:

Ceiling Hole = 8-3/4" (222 mm) diameter

Roof Hole = 9-3/8" (238 mm) diameter

c. DO NOT ALLOW DEBRIS TO FALL INTO THE

FURNACE. THIS COULD CAUSE UNSAFE

OPERATION AND VOIDS THE FURNACE

WARRANTY. Use the top cap that comes with the

furnace packaging (or alternate protector) to prevent

debrisfromfallingintothefurnacebeforethefinalroof

jack connection is made.

IMPORTANT:

Refer to the installation instructions provided

with optional air conditioning packages when

installing furnaces with optional cooling coil

cabinet or with optional C***-series indoor coils.

XSEE

TABLE 7

REDUCER

FELT-SEAL

SPACERS

OPENING TO DUCT

WITH PLATE (C) REMOVED

OPENING BECOMES

13-1/4” x 13-1/4”

13 1/4"

10 1/4"

19”

19"

Top View

of Duct

Connector

SUPPLY AIR DUCT

FLOOR CAVITY

(depth equal to "X" in Figure 11 and Table 7)

If "X"

(Floor cavity) is:

7/8" (22mm) 901987

2" (51mm) 901988

4 1/4" (108mm) 901989

6 1/4" (159mm) 901990

8 1/4" (210mm) 901991

10 1/4" (260mm) 901992

12 1/4" (311mm) 901993

Use Duct

Connector Model

IF PITCH IS: FLASHING NO. "X" FACTOR IS:

2" in 12" 901942 2 1/8" (54MM)

(51mm/304mm)

2 1/2" in 12" 901941 2 1/2" (64MM)

(64mm/304mm)

3" in 12" 901940 2 7/8" (73MM)

(76mm/304mm)

3 1/2" in 12" 901939 3 1/4" (83MM)

(89mm/304mm)

4" in 12" 901938 3 5/8" (92MM)

(102mm/304mm)

5" in 12" Use 901941 2 1/2" (64MM)

(127mm/304mm) with flue having

slant flashing.

See Fig. 8

Figure 12. Closet or Alcove

Figure 13. Cut-Out Locations

Figure 15. Duct Connector

Figure 14. Mounting Plate

Figure 16. Installation of Duct Connector

INSTALL DUCT CONNECTOR

a. Place duct connector through the floor opening with

bottomtabsextendingthroughtheductopening.(See

Figure 15)

b. Secure duct connector to floor.

c. Bend bottom tabs under and up tightly against the

supply air duct (See Figure 16).

NOTE: The duct connector is designed for use on ducts 12"

in width. When using the connector on 12" wide ducts, there

maybeinsufficientclearancetobendthetabsontwosidesof

the duct connector. In such cases the tabs may be attached

to the sides of the duct by using sheet metal screws or other

suitable fasteners. (See Figure 17).

Iftape isused toprovide abetter seal,it shouldbe approved

by applicable national or local codes.

ALTERNATE ATTACHMENT METHODS

This procedure may also be used to install a furnace duct

connector to narrow metal ductwork where insufficient

clearancepreventsbendingoftheduct connectortabsatthe

side(s) of the duct. (See Figure 18).

CUT DUCT OPENING

a. Place duct connector through the floor opening with

bottom tabs resting on top of the supply air duct.

b. Center duct connector and push back against rear

edge of floor opening.

c. Mark cut-out location (tab area) and remove duct

connector.

d. Cut out duct opening 1/4" larger than area marked.

INSTALL FURNACE MOUNTING PLATE

a. Placemountingplate(suppliedwithinductconnector)

at rear of the floor opening (See Figure 15).

REAR WALL

MOUNTING

PLATE

FLOOR

OPENING FUEL

LINE

HOLES

SUPPLY AIR DUCT

CUT DUCT OPENING

1/16TH. LARGER THAN

DUCT CONNECTOR

REAR WALL

SUPPLY AIR DUCT

FUEL

LINE

HOLES

MOUNTING

PLATE

FLOOR

OPENING

UNDER DUCT OPENING

TABS TABS

DUCT DUCT

1. INSERT DUCT PLENUM CONNECTOR

INTO DUCT CUT-OUT. 2. BEND BOTTOM TABS OVER

AND ONTO THE UNDERNEATH

DUCT SERVICE.

FLOOR CUT-OUT

FOR DUCT CONN.

CEILING

CUT-OUT FOR

FLUE AND

ROOF JACK

(See Fig 12)

24"

23-1/4"

21-3/4"

14-1/2"

2-1/4"

2-3/4"

20"

14-1/2"

13-1/2"

FURNACE OUTLINE

FLOOR CUT-OUT

FOR OPTIONAL

COOLING COIL

10"

12-7/8"

14-3/4"

15-1/2"

1-1/4" D.

ALT FUEL-LINE

ENTRY FURNACE

OUTER DOOR

REAR WALL OF CLOSET OR ALCOVE

FUEL-LINE

1-3/4"

3/4"

CEILING AND ROOF

OPENINGS

13-1/2"

10"

23 -1/4"

FLOOR

OPENING

ALT. FUEL

LINE HOLES

SIDE WALL

REAR WALL

FUEL LINE

HOLE

MTG. PLATE TABS SLIDE FURNACE

ALL THE WAY BACK

ONTO MTG. PLATE

SUPPLY AIR DUCT

Knockout Over Holes

SECURE FURNACE

WITH 2 FASTENERS AT FRONT

CORNER HOLES

SUPPLY AIR DUCT

FUEL

LINE

HOLES

MTG. PLATE TABS SLIDE FURNACE

ALL THE WAY BACK

ONTO MTG. PLATE

SECURE FURNACE

WITH 2 FASTENERS

AT FRONT CORNER HOLES

Duct

Duct Connector

Narrow Duct

Staple Folded Duct

Flap (typ) to side of Duct

Connector

Duct

STEP 4.

STEP 1.

"A" "A"

"B"

"B" Cut- Out

Area"A"

Cut- Out

Area "A"

Fold Back Flap "B"

Top of Duct

"A" "A"

STEP 2.

"B"

Fold Back Flap"B"

Cut

Lines Duct

Fold Back Flap"B"

STEP 3.

Bend Duct Connector Tabs Up

and Over- (along length of duct)

Duct

Flap "B"

Duct

Figure 17.

Figure 18.

1. ScoreandcutthetopofthemetalductasindicatedinStep

1orStep2.WithStep1choice,alsocutoutthemetalfrom

the shaded area “A”.

2. Fold the duct flap “B” up, (See Step 3).

3. At the front-to-back of duct run (Area “A”), bend the duct

tabs and secure them directly to the duct.

4. AtArea“B”,bendtheducttabsupandbackover,around

the duct connector, (See Step 3).

5. Fold/form the duct flap against the side of the duct

connectorand attach as shown, (SeeStep 4). Use three

(3)staples(minimum)oneachductflapOR,ifa2Xblock/

joist is not provided, use two (2) sheet metal screws

(minimum) on each duct flap. An alternate attachment

method is acceptable, as long as the plenum is securely

attached.

6. Tapetheductflapedgeswithanapprovedtapeforaleak-

free joint.

INSTALL FURNACE

a. Remove furnace outer door(s) and bottom fuel line

knockout.

b. Place furnace onto duct connector and center with

floor opening.

c. Slide onto mounting plate. (Bottom rear slots on

furnace should engage with mounting plate tabs.)

d. Securefrontwithone(1)fastenerateachcorner(See

Figure 19 or 20).

NOTE: Additional fasteners may be used at rear, sides or

throughdoorframe,asdesired,tosecurefurnacetoclosetor

alcove framing.

INSTALL ROOF JACK

Apply caulking compound on underside of roof flashing to

form a continuous strip at least 3/8" wide (see Figure 21)

aroundtheundersideoftheperimeteroftheflashing.Connect

RoofJack Assembly to the furnace. Insert telescoping Roof

JackAssembly through theopening cuton theroof. Connect

fluepipetofluecollaroffurnace.Connectcombustionairpipe

tofurnace collar with sheet metalscrew (See Figure 22). It is

recommendedthattheconnectionofthecombustionairpipe

to the furnace be made before the flashing is secured to the

rooftomaintainalignmentofroofjackandfurnaceconnections.

NOTE:Forreplacementfurnaces,besuretheinnerfluepipe

connectsoverthefurnaceventcollar.DONOTuseasmaller

diameter inner flue pipe which could slide inside the

furnace vent collar and restrict the flow of furnace flue

products.

AttachRoofFlashing: Ifnecessary,shiftroofflashingslightly

intheroofopeningsothatassemblyisingoodalignmentwith

furnace. Press down firmly over caulking on roof flashing to

make the seal with roof water tight. Secure flashing with

appropriatefasteners. Asanaddedprotectionagainstleaks,

coat the flashing plate and fasteners with approved roofing

compound.

If flashing mounted on 12 degree angle is used it may be

necessary to adjust the angle to match the roof pitch; (1/12 -

4/12 maximum).

Figure 19. “A” & “B” Cabinet Furnaces

Figure 20. “A” Cabinet Furnace on 911969 Coil Cabinet

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