A06_Manual.pdf

For installation in:

1. Manufactured Homes

2. Recreational Vehicles, Park Models, Manufactured Buildings

3. Modular Homes/Buildings

! WARNING:

If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

– Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appli-ance.

– 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 build-ing.

• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.

• If you cannot reach your gas sup-plier, call the fire department.

– Installation and service must be per-formed by a qualified installer, ser-vice agency or the gas supplier.

! WARNING:

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 sup-ply.

! WARNING:

Improper installation, adjustment, al-teration, service or maintenance can cause injury or property damage. Re-fer to this manual. For assistance or additional information consult a quali-fied installer, service agency or the gas supplier.

Owners Manual/Installation Instructions Series M1B, M1G, M1M and M1S

Downflow, Direct Vent (Sealed Combustion) Forced Air Gas and Oil Furnaces

LEAVE THESE INSTRUCTIONS WITH THE HOMEOWNER.

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TABLE OF CONTENTS

1. SPECIFICATIONS

2. OWNERS INFORMATION

3. MANUFACTURER WARRANTY, OWNER RESPONSIBILITY

4. INSTALLATION STANDARDS

5. UNIT LOCATION

6. MINIMUM CLEARANCES

7. RETURN AIR PROVISIONS

8. AIR DISTRIBUTION SYSTEMS

9. ROOF JACK SELECTION

10. DUCT CONNECTOR SELECTION

11. INSTALLATION

12. INSTALLATION OF TRANSIT-MODE VENTING SYSTEM

13. ELECTRICAL WIRING

14. FUEL PIPING

15. FLUE GAS SAMPLING

16. LIGHTING AND FURNACE SHUT DOWN

17. SERVICE GUIDE

18. MAINTENANCE

19. OPTIONAL ACCESSORIES

20. WIRING DIAGRAMS......................................................................... 34-39

21. EQUIVALENT ORIFICE SIZES AT HIGH ALTITUDES

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

! 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.

NOTICE TO INSTALLER

Installer is advised to follow carefully all instruc-tions and warnings in this manual to insure maximum performance, safety, and operating efficiency of these appliances. Improper instal-lation 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), downflow heating appliances for manufactured (mobile) homes, recreational vehicles, and for use in residential/ modular/commercial construction. The furnace must be located so that venting can be properly achieved.

Air conditioning may be added to structures with M1 series furnaces using Platinum series air conditioning or conventional units. This Instal-lation Instruction manual includes special re-quirements for incorporation of air conditioning equipment to the M1 series of furnaces.

Multi-speed blower assemblies as shown in Table 3 have been certified for field installation in M1 Series furnaces. An air conditioner can be easily field installed with M1GH Series furnaces if used in conjunction with certified 2-wire relay box, p/n 903092A or 4/5 wire relay box 902898A.

2.OWNER INFORMATION

ABOUT YOUR CENTRAL

FURNACE SYSTEM

NORDYNE has been involved in the design of products for the manufactured home industry since the first manufactured home or trailer was built.

NORDYNE originated the sealed combustion system, which separates the furnace combus-tion system from the living area of the home, now a standard for the manufactured home industry.

NORDYNE engineers developed the first cen-tral heating system and the first central air conditioner for manufactured homes.

NORDYNE is dedicated to bringing to its cus-tomers the finest heating and cooling comfort possible. NORDYNE constantly seeks to fur-ther 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 avail-able from your heating and cooling contractor.

These systems are designed to work best with your NORDYNE furnace and have been care-fully engineered to deliver optimum performance when mated with NORDYNE manufactured home furnaces.

NORDYNE also offers water heaters, fire-places and ventilating systems specifically de-signed 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

It is the sole responsibility of the homeowner to make certain the gas furnace has been cor-rectly set up and converted to the proper fuel (L.P. gas or Natural gas) and adjusted to oper-ate properly. All gas furnaces are manufac-tured for Natural gas and must be field con-verted when using L.P. gas.

A warranty certificate with full details is included with these instructions. However, NORDYNE will not be responsible for any costs found necessary to correct problems due to improper setup, improper installation, furnace adjust-ments, 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. Correcting wiring problems in the electrical circuit supplying the furnace.

4. Resetting circuit breakers, blown fuses or other switches.

5. Correcting problems due to improper gas supply pressure to the furnace.

6. Providing instructional training on how to light and operate 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 as-sembly (Roof Jack).

10. Adjusting or calibrating of thermostat.

11. Any construction debris which falls into flue system.

Electrical Supply - 120 volts, 60HZ, 1 Ph.

Fuse or Breaker - 15 amps Temperature Rise - 45° to 75°F 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.

Thermostat Circuit - 24 volts, 60HZ, 30 vac Normal Anticipator Setting - 0.4 Manifold Pressure - Natural Gas: 3.5” w.c.

LP Gas: 10” w.c.

*Blower capacity only - needs relay box for AC

Table 2. M1 Furnace Specifications

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 0.3 x 1/8 2* M1GB 056 56 45 29 45 0.3 x 1/4 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 1/4 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 62 21 40 0.3 x x 1/4 3* M1GB 077 77 62 21 40 0.3 x x 1/4 3 M1GC 077 77 62 21 40 0.3 x x 1/2 4 M1GD 077 77 62 21 40 0.3 x x 3/4 5 M1GH 090 90 72 17 36 0.3 x x 1/4 3* M1GB 090 90 72 17 36 0.3 x x 1/4 3 M1GC 090 90 72 17 36 0.3 x x 1/2 4 M1GD 090 90 72 17 36 0.3 x x 3/4 5 M1MA 056 56 46 29 45 0.3 x x 1/8 2 M1MB 056 56 46 29 45 0.3 x x 1/4 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 1/4 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 M1BA 066 66 53 26 43 0.3 x x 1/5 2½ M1BB 066 66 53 26 43 0.3 x x 1/4 3 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 0.3 x 1/5 2½ M1SB 066 66 54 .50 Gph 0.3 x 1/4 3 M1SC 066 66 54 .50 Gph 0.3 x 1/2 4 M1SB 086 86 71 .65 Gph 0.3 x 1/4 3 M1SC 086 86 71 .65 Gph 0.3 x 1/2 4

Burner Model AF-10 Nozzle Spray Angle

80° A

Carefully review these responsibilities with your manufactured housing dealer, service com-pany or gas supplier so there will be no misun-derstanding at a later time.

! CAUTION:

• Never attempt to alter or modify this furnace or any of its components.

• Never attempt to repair damaged or inoperable components. Such action could cause unsafe operation, explo-sion, fire and/or asphyxiation.

• If a malfunction has occurred, or if you feel that the furnace is not oper-ating as it should, contact a qualified service agency or gas utility for as-sistance.

4.INSTALLATION STANDARDS

Installer shall be familiar with and comply with all codes and regulations applicable to the instal-lation of these heating appliances and related equipment. In lieu of local codes, the installation shall be in accordance with the current provi-sions of one or more of the following standards.

Table 3. Field Installation Blower Assemblies

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

Removable access panel should be installed 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 or 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

6"(152 mm)

1"(25 mm)

0" Side Clearance to Furnace Cabinet or in closet door

Figure 4. Special 1” Clearance

Figure 3. Closet Installation

Figure 2. Alcove Installation

A/C Capacity Blower Wheel Motor-Hp Ton

903773 10 x 8 1/4 2, 2½ & 3 903413 11 x 8 1/2 2, 2½, 3 & 4 903414 11 x 8 3/4 2, 2½, 3, 4 & 5

Part No.

Blower / Motor Assembly

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"

Table 4. Minimum Clearances Figure 5. Non-Platinum

Supply Duct System

A Single trunk duct

B Dual trunk duct w/crossover connector

C Transition duct w/branches

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 in-stallations.

c. American National Standard (ANSI-Z223.1/ NFPA-54) and/or CAN/CGA B149 for all gas-fired furnace models.

d. American National Standard (ANSI-Z95.1/ NFPA-31) and/or CSA B139 for all oil-fired furnace models.

e. American National Standard (ANSI-C1/ NFPA-70) and/or CSA 22.1 Canadian Elec-tric Code Part 1 for all electrical field wiring.

f. Units have been investigated under stan-dards UL 307A & B, UL727-1999, ANSI 21.47a - CAN/2.3a - 1995, and CSA B140.10.

5.UNIT LOCATION

The furnace shall be appropriately located to the supply and return air distribution system.

(See “AIR DISTRIBUTION”, Page 8) 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 through the furnace door louvers. DO NOT connect a ducted return air system di-rectly to the furnace. Improper installation may create a hazard and damage equipment, as well as void all warranties.

Furnace may be installed on combustible floor-ing when using NORDYNE Duct Connectors (see Section 10).

When installed in a residential garage, the fur-nace must be positioned so the burners and the source of the ignition are located no less than 18 inches above the floor and protected from physical damage by vehicles.

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 assem-bly, controls, and vent connections.

a. Alcove installations (see Figure 2): minimum 18" clearance at front of furnace shall be provided for future servicing. A removable access panel should be installed between top of the furnace door frame and the ceiling.

b. Closet installations must use a louvered door having a minimum free area of 235 sq. in.

when located 6" from furnace (See Figure 3) or 390 sq. in. for 5 ton ready M1 furnaces. For special clearance between 1" and 6", re-quirements are a louvered door with a mini-mum of 250 sq. in. free area, with the open-ings in the closet door in line with the louvered openings in the furnace door . A fully louvered closet door may be used (See Figure 4 and section 7.i. to evaluate compliance with this requirement).

7.RETURN AIR PROVISIONS

U.S.A. home manufacturers shall comply with all of the following conditions to have acceptable return air systems for closet installed forced air heating appliances:

! CAUTION:

HAZARD OF ASPHYXIATION: Nega-tive 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.

ROOF JACK

SLANT DECK

FLASHING

PITCHED

ROOF

CEILING

CEILING CAVITY

ROOF OPENING

CEILING OPENING

"X" (SEE TABLE 6)

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.

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"

Table 5. Roof Jack Assemblies

a. Regardless of the location, the return air opening into the closet shall not be less than specified in the appliance’s listing.

b. Means shall be provided to prevent inadvert-ent closure by a flat object placed over the return air opening when it is located in the floor of the closet (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 235 sq. in. At least one register should be located where it is not likely to be covered by carpeting, boxes and other objects.

e. Materials located in the return duct system must have a flame spread classification of 200 or less. This includes a closet door if the furnace is in a closet.

f. Noncombustible pans having 1" upturned flanges are 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).

S SAW T 27 47 - 2

AW= ALL WEATHER

FLASHING

PITCH/12" RISE

0=FLAT

2=2.5/12 4=4/12

MIN. ADJ.

LENGTH

F= S=

FLAT FLASHING

SLANT FLASHING TYPE:

BLANK=NON-TRANSIT

T= TRANSIT MODE

MAX. ADJ.

LENGTH

FLUE STEEL TYPE

A= ALUMINIZED

S=STAINLESS

All Weather Roof Jack Assemblies

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 6. Roof Jack Assemblies

ROOF JACK

SLANT DECK

FLASHING

PITCHED

ROOF

CEILING

CEILING

CAVITY

ROOF

OPENING

"X" (SEE TABLE 1)

Flue Pipe

Combustion Air Pipe

56" or 76"

Furnace

"A"

"B"

Figure 7. Example of Flat Jack with Flashing

Figure 8. Example of 2½/12 Slant Jack with Flashing

5/12 ROOF SLOPE

SLANT DECK

/121 2

ROOF JACK WITH

FLASHING

/12 SLANT1 2

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. If the roof jack crown is covered or blocked with snow, the furnace will not operate prop-erly. If the home is located in regions where snow accumulation exceeds 7” (HUD snowload zones) use an external roof jack extension p/n 901937.

f. M1 furnaces may be used with roof jacks as tall as 170” (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.

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

i. Test the negative pressure in the closet with the air-circulating fan operating at high speed and the closet closed. The negative pressure is to be no more negative than minus 0.05 inch water column.

j. Air conditioning systems may require more duct register and open louver area to ob-tain necessary 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 designed so that the static pressure measured external to the furnace does not exceed the listed static pressure rating shown on the furnace rating plate.

Location, size, and number of registers should be selected on the basis of best air distribution and floor plan of the home.

! CAUTION:

HAZARD OF ASPHYXIATION: Do not cover or restrict return air opening.

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 opening to center of ceiling opening.

(See Dimension “A” in Figure 6.)

b. Determine ceiling height and subtract height of furnace. (See Dimension “B” in Figure 6.)

c. Add dimensions A + B (and X from Table 6 and Figure 7 if slant deck flashing is used). The total length of (A + B + X) must be within the minimum and maximum range of one of the Roof Jacks listed in Table 5.

APPLICATION NOTES:

a. FAW, FAWT, SAW and SAWT Series Roof

Jacks with a 5" diameter inner vent pipe may be used with all models of M1 Series gas and oil furnaces.

Table 6. Slant Deck Flashings

Table 7. Floor Cavity Sizes

Optional Deck Flashings for Flat and 2.5/12 Pitch Roof Jacks.

(4/12 Pitch Roof Jacks not applicable.)

USE SLANT DECK

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

"F Series Roof Jack

2" in 12" 903893 (2.5/12) 2-1/8" 2-1/2" in 12" 903893 (2.5/12) 2-1/2"

3" in 12" 903894 (3/12) 2-7/8" 3-1/2" in 12" 903894 (3/12) 3-1/4"

4" in 12" 903895 (4/12) 3-5/8"

"S" Series Roof Jack (2.5/12 Pitch only)

4-1/2" in 12" 903895 (2.5/12) 2-1/8" 5" in 12" 903895 (2.5/12) 2-1/2"

5-1/2" in 12" 903894 (3/12) 2-7/8" 6" in 12" 903894 (3/12) 3-1/4"

6-1/2" in 12" 903895 (4/12) 3-5/8"

English Metric (mm) Finger Tab Screw Down 7/8" 22 901987 904008 2" 51 901988 904009

4-1/4" 108 901989 904010 6-1/4" 159 901990 904011 8-1/4" 210 901991 904012

10-1/4" 260 901992 904013 12-1/4" 311 901993 904014

Use Duct Connector Model Part Number:If "X" (Floor Cavity) is:

10. DUCT CONNECTOR SELECTION b. Select appropriate model from Table 7 which matches X-dimension of the floor cavity. To maximize air delivery, re-move reducer “C” (see Figure 11) to obtain the largest open area that will fit the duct/floor construction. Screw down duct connector opening to duct without reducer is 13” x 13”. With reducer it is 13” x 10-1/8”.

Figure 10.

Figure 9.

13 1/4"

10 1/4"

19”

Top View of

Finger Tab Duct

Connector x

SUPPLY AIR DUCT

FLOOR CAVITY

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

Figure 11.

X SEE

TABLE 7

REDUCER

*FELT-SEAL

SPACERS

C

*OPENING TO DUCT

WITH PLATE (C) REMOVED

OPENING BECOMES

13-1/4” x 13-1/4”

*INDICATES FINGER TAB DUCT CONNECTOR ONLY

PLATINUM SERIES

a. For Platinum ready construction use the 14” round duct connector, p/n:

903896.

NON-PLATINUM SERIES

a. Determine depth of floor cavity from surface of floor to top of supply air duct (See Figure 9).

Figure 12. Closet or Alcove

CEILING AND ROOF

OPENINGS

CL

CL

13-1/2"

10"

23 -1/4"

FLOOR

OPENING

CLCL

ALT. FUEL

LINE HOLES

SIDE WALL

REAR WALL

FUEL LINE

HOLE

FLOOR CUT-OUT

FOR DUCT CONN.

CEIL

IN

G

CUT-O

UT F

OR

FLU

E A

ND

ROOF JA

CK

(S ee

F ig

)CL

CL

CL

CL

-1

/4 " 21

-3 /4

-1

/2

2- 1/

4"

2-3/4"

20"

14-1/2"

-1 /2

F U

R N

A C

E O

U T

L

IN

E

FLOOR CUT-OUT

FOR OPTIONAL

COOLING COIL

FOR NON-PLATINUM

SERIES UNITS

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"

2"

3/4"

Figure 13. Cut-Out Locations

11. INSTALLATION

Required floor, ceiling, and roof cut-out open-ings must be carefully located to avoid misalign-ment of the furnace and Roof Jack (see Figures 12 & 13). Installation procedures 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. Locate center of the floor opening, measured

10" from the rear wall, and mark cut-out measuring approximately 14-1/2" by 14-1/2" (± 1”) for model duct connector used (refer to Figures 10 & 11).

c. Locate center of fuel line hole, measured 23- 1/4" from the rear wall and 6-5/8" to the left of center of the floor cut-out (See Figure 12) or

5-1/4" to the left of center of 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.

! 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.

CUT OUT CEILING AND ROOF OPENINGS

a. Locate center of Roof Jack opening, mea-sured 13 1/2" from the rear wall of closet or alcove along the center line of furnace and floor opening. (See Figure 13)

Figure 15. Duct Connector

Figure 14. Mounting Plate

REAR WALLMOUNTING

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

Non-Platinum Series Platinum Series

DUCT

CONNECTOR

MOUNTING

PLATE

SCREWS

FUEL

LINE

HOLES

14” SUPPLY

CONNECTION

Figure 16. Installation of Duct Connector

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 debris from falling into the furnace before the final roof jack connection is made.

CUT DUCT OPENING (FINGER TABBED

ONLY)

a. Place duct connector through the floor open-ing 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. Place mounting plate (supplied within duct connector) at rear of the floor opening (See Figure 15).

INSTALLING PLATINUM SERIES 14” ROUND

DUCT CONNECTOR

a. Place duct connector through the floor open-ing. (See Figure 15).

b. Secure duct connector to floor.

INSTALLING SCREW DOWN DUCT CON-

NECTOR

a. Apply a bead of caulking, mastic, or other approved sealant around bottom side of 1/2” flange and restrictor plate, when applicable.

b. Locate the duct connector over duct and carefully lower screw down duct connector into place.

c. Once duct connector is located on duct, temporarily hold in place while fastening duct connector to the floor using flat head screws or nails. Be sure flanges of duct connector stay in contact with the duct.

d. Screw plenum to duct making sure a seal is made between the duct and the duct connec-tor. Additional screws may be added if re-quired.

e. Cut away duct along edge of flange allowing the center to drop into the duct. Remove section of duct with caution, as edges will be sharp.

INSTALLING FINGER TABBED DUCT CON-

NECTORS

a. Place duct connector through the floor open-ing with bottom tabs extending through the duct opening. (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 may be insufficient clearance to bend the tabs on two sides of 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).

If sealant, mastic, or tape is used to provide a better seal, it should be 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 clearance prevents

Duct

Duct Connector

Narrow Duct

Figure 17.

TABS

TABS

DUCT

DUCT

1. INSERT DUCT CONNECTOR INTO

DUCT CUT-OUT.

2. BEND BOTTOM TABS OVER

AND ONTO THE UNDERNEATH

DUCT SERVICE.

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"

Fold Back Flap "B"

Top of Duct

"A" "A"

STEP 2.

"B"

"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 18.

bending of the duct connector tabs at the side(s) of the duct. (See Figure 18).

1. Score and cut the top of the metal duct as indicated in Step 1 or Step 2. With Step 1 choice, also cut out the metal from 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. At Area “B”, bend the duct tabs up and back over, around the duct connector, (See Step 3).

5. Fold/form the duct flap against the side of the duct connector and attach as shown, (See Step 4). Use three (3) staples (minimum) on each duct flap OR, if a 2X block/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 duct connector is securely attached.

6. Tape the duct flap edges with an approved tape for a leak-free joint.

INSTALL FURNACE

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

b. Place furnace onto duct connector and cen-ter with floor opening.

c. Slide onto mounting plate. (Bottom rear slots on furnace should engage with mounting plate tabs.)

d. Secure front with one (1) fastener at each corner (See Figure 19 or 20).

NOTE: Additional fasteners may be used at rear, sides or through door frame, as desired, to secure furnace to closet or 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) around the underside of the perimeter of the flashing. Connect Roof Jack Assembly to the furnace. Insert telescop-ing Roof Jack Assembly through the opening cut on the roof. Connect flue pipe to flue collar of furnace. Connect combustion air pipe to furnace collar with sheet metal screw (See Figure 22). It is recommended that the connec-tion of the combustion air pipe to the furnace be made before the flashing is secured to the roof to maintain alignment of roof jack and furnace connections.

NOTE: For replacement furnaces, be sure the inner flue pipe connects over the furnace vent collar. DO NOT use a smaller diameter inner flue pipe which could slide inside the fur-nace vent collar and restrict the flow of furnace flue products.

Attach Roof Flashing: If necessary, shift roof flashing slightly in the roof opening so that assembly is in good alignment with furnace.

Press down firmly over caulking on roof flashing to make the seal with roof water tight. Secure flashing with appropriate fasteners. As an

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

Figure 19. “A”, “B”, & Platinum Cabinet Furnaces

Figure 20. “A” Cabinet Furnace on 911969 Coil Cabinet (Non-Platinum Series) added protection against leaks, coat the flash-ing 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).

12. INSTALLATION OF TRANSIT-

MODE VENTING SYSTEM

MANUFACTURED HOME FACTORY

a. Furnace to be installed per furnace installa-tion manual.

b. Roof Jack to be selected from Table 5 of these instructions.

c. Roof Jack (less upper Roof Jack crown), with weather cap to be installed as described under Install Roof Jack.

d. Upper Roof Jack crown to be stored in a prominent location inside manufactured home until on-site installation.

e. The four warning tags supplied must be installed as follows:

• To weather cap

• To fuel line connection point (Gas) or furnace burner (Oil)

• To furnace flame observation door (Gas or Oil)

• To furnace wall thermostat

MANUFACTURED HOME SITE

a. Transit-mode weather cap to be removed and upper Roof Jack crown installed (See Figure 24).

b. Place upper Roof Jack (crown) on to the flue pipe assembly. Be sure inside flue pipe attaches over inner flue pipe. Be sure outer Roof Jack pipe fits over outer pipe. Secure in place using three (3), #10, 1/2" sheet metal screws removed in step #a. Do not use the same holes which secured the rain cap in place.

Secure Roof Jack with appropriate fasteners after connecting to furnace

Ceiling

Caulk under roof flashing to prevent water leakage

Roof

Optional #901943 Ceiling Trim Ring or #902521 2-piece Ceiling Ring

Figure 21. Flat Roof

Ceiling

Caulk under roof flashing to prevent water leakage

Secure flashing with appropriate fasteners

Secure lower roof jack section with

no. 10 S.M. screws

Roof

Upper Roof Jack Section

Optional Slant-Deck Flashing

Figure 23. Pitched RoofFigure 22.

c. Venting system warning tags to be removed and discarded.

! WARNING:

Failure to properly secure the flue pipe to the furnace may result in fire, explo-sion or asphyxiation when operating the furnace.

13. ELECTRICAL WIRING

Refer to the wiring diagram in these instructions or affixed to the inside of the control box cover for the wiring of your particular unit.

ELECTRICAL BRANCH SUPPLY CIRCUITS.

Route all electrical wiring to the left side of the furnace. For installation of “A” Cabinet fur-naces, allow sufficient slack in the wiring if an optional cooling coil cabinet is added at a later time. Use of copper conductors is recom-mended.

! WARNING:

Any attempt to operate furnace before replacing transit-mode weather cap with upper roof jack section may re-sult in hazard of fire, explosion or as-phyxiation.

Power supply circuit to the furnace must be installed and grounded in accordance with the National Electrical code (ANSI-C1/NFPA-70), or Canadian Electric Code Part 1 (CSA 22-1) and all local codes having jurisdiction.

CONNECT POWER SUPPLY WIRES

a. Remove the furnace control panel cover.

b. Insert 115 volt wires through the strain relief on the left side of the furnace control box (see Figure 25).

c. Connect the “hot” wire to the BLACK pigtail lead, and the “neutral” wire to the WHITE pigtail lead. Secure all connections with suitable wire nuts.

d. Connect the “ground” wire to the grounding screw.

e. Reinstall the control panel cover and secure with the original mounting screws.

CONNECT THERMOSTAT WIRES

a. Insert 24 volt wires through the plastic grom-met just above the control panel.

b. Connect the thermostat wires to the furnace low voltage pigtails (see Figure 25).

c. Connect low-voltage circuit to the wall ther-mostat.

d. A hole may be made in the furnace cabinet to ease thermostat wiring. Make sure that the wiring is protected from the sharp edge of the added hole.

NOTE: The thermostat should be installed 4 to 5 feet above the floor on an inside wall which is relatively free from direct sources of heat or

SCREWS

COMPLETED

ASSEMBLY

TO FURNACE

UPPER ROOF

JACK (CROWN)

INNER FLUE

PIPE

FLUE ASSEMBLY

OUTER PIPE

FLASHING

WEATHER CAP

Figure 24.

If the heat anticipator is set too low, the furnace may cycle frequently and not provide comfort to the homeowner.

14. FUEL PIPING

Sizing and installation of fuel lines must be in accordance with federal, state and local regu-lations. All piping shall be black iron pipe, or equivalently sized steel tubing. Internally tinned copper tubing may be used for gas supply systems.

Fuel line installations other than typical installa-tions shown in Figures 26 and 27 must comply with the fuel piping provisions stated in the Federal Manufactured Home Standard (H.U.D.

TITLE 24, PART 280) and the National Fuel Gas Code (ANSI-Z223.1/NFPA-54).

a. Optional fuel inlet lines are available for all gas furnace models to permit the addition of a 1/ 2" F.P.T. shut-off valve above the floor.

NOTE: Shut-off valve must be designed and listed for use with liquid petroleum (L.P. gas).

The gas supply to your home will either be Natural Gas or L.P. (bottle gas). Your furnace is factory equipped to operate on Natural Gas.

If your gas supply is L.P. (bottle gas), you must contact a qualified serviceman or gas supplier to convert the furnace. The necessary instruc-tions for the gas conversion are found on the lighting instruction label attached to the furnace in Section 16, Service Guide.

cold drafts. The nominal anticipator setting is

0.4. (Refer to the thermostat literature for addi-tional information.)

Five-conductor thermostat wire is recom-mended for 24 volt low-voltage circuit (2-wire is required for furnace only; 5-wire for heating and optional cooling systems).

For Platinum-ready Construction:

a. Use a heat/cool thermostat.

b. Run thermostat wire from the Thermostat to the Furnace (see Figure 39).

c. Using thermostat wire with at least two wires

(four wire is recommended), run thermostat wire from the Furnace to the intended loca-tion of the Platinum-series unit. Leave at least six feet of extra thermostat wire at the in-tended location for future hook-up. Coil re-maining six feet of wire and attach to the home’s undercarriage.

Once the furnace is installed check the thermo-stat anticipator against the nominal setting of 0.4:

1. Connect the milliamp meter in series with one of the gas valve’s low voltage terminals.

2. Energize the gas valve.

3. Read the value of the milliamps.

4. Adjust the heat anticipator of the thermostat to the value read on the milliamp meter.

If the heat anticipator is set too high, the furnace may delay in coming on.

Figure 25. Control Panel (All Models)

To Combustion Blower or Flame Roll-Out Switch

Thermostat Wires

Blower Plug

On-Off Switch

On-Auto Switch (Heating Models Only)

To Gas Valve or Burner

Power Entry

Furnace Control Box

Table 8. Thermostat Wire Gauge

To Gas Supply

Floor

Control Panel

On-Off-Fan Switch

Alt. Fuel Line Entry

Floor Cavity

Figure 26. Typical Gas Piping

For natural gas operation, the furnace is de-signed for 7" W.C. inlet pressure. Pressure is reduced to 3-1/2" W.C. by the pressure regu-lator in the gas valve. The maximum inlet pressure for the valve is 13” W.C.

For L.P. gas, pressure to the gas valve must be more than 11" W.C. but not more than 13" W.C. Pressure is reduced to 10" W.C. by the pressure regulator in the gas valve.

! CAUTION:

The furnace must be converted by a qualified technician. Improper conver-sion can cause unsafe operation, ex-plosion, fire and/or asphyxiation.

Oil Tank and Piping Installation The following procedures are recommended as good practice. However, requirements of local codes and ordinances, H.U.D. Manufac-tured Home and Safety Standards or National Fire Protection Association must be satisfied, where they apply, for an approved installation.

Use a tank capacity suitable for the application with a weatherproof, capped fill opening and a shielded vent to let in air as fuel is used. The tank must be clean inside before filling. All water, rust, sediment and other foreign matter must be flushed out.

A fuel or tank gauge is recommended for easy checking of the fuel level. Check the gauge reading with a dipstick.

Locate the storage tank conveniently near the home. For above ground fuel tank installations, the tank may rest three to four inches off the

T’STAT

Wire Gauge

2-Wire 5-Wire (Heating) (Heating/Cooling)

24 55 25 22 90 45 20 140 70 18 225 110

Recommended T’STAT Wire Length (Unit to T’STAT)

F ig u re

7.

T yp ic al O il P ip in g f o r

A b o ve

G ro u n d

S in g le

-L in

e) S u p p ly

If fu el p um p fa ils to li ft oi l, ch ec k fo r ai r po rt p lu g an d re pe at p rim in g pr oc ed ur e.

le a ks a n d t ig h te n a ll fu e l f itt in g s.

R e pr im e fu el p um p by in je ct in g fu el o il in to op tio na l ( to

p) r et ur n po rt . R ep la ce r et ur n

R

T op o f T an k ft.

S hu t-of f V al ve

O pt io na l F ue l

F ilt er

A lte rn at e F ue l L in e

E nt ry

O pt io na l R et ur n

P re ss ur e G au ge

P or t

N oz zl e

P or t In le t

P or t

A ir-

B le ed V al ve

R et ur n

P or t & In te rn al B y- P as s

O pt io na l In le t

C on tr ol

P an el

O il

F ur na ce

O n-

O ff-

F an

S w itc h

F lo or C av ity

O il-

G un

B ur ne r

F lo or

F lu e G as S am pl in g

H ol e

D ra in

E nd o f O il S up pl y Li ne 3" to

A bo ve

B ot to m

D ra in

G ui de p ip e

G au geV en t w ith

C ap

2" D up le x B us hi ng

2" F ill

3/ 8"

O il

S up pl y

Li ne

N ot e:

A dd iti on al v en tin g m ay b e re qu ire d if ta nk is fi lle d ra pi dl y.

ground. Fuel tanks may also be buried if prop-erly coated to resist corrosion. For below ground fuel tank installations, the vertical dimension from the bottom of the fuel tank to the fuel pump must not exceed ten feet. Keep the tank filled, especially in the summer to reduce the accu-mulation of condensation.

Fuel Line Hook-Up: One Line System The one line system is highly recommended where vertical lift, from bottom of tank to pump, is not more than eight feet. A single line hookup has the advantage of costing less and giving quieter operation.

Fuel Line Hook-Up: Two Line System Use a two line system only if the vertical lift exceeds 8 feet.

1. Install the oil feed line as outlined in steps 1-

6 below.

2. Install the oil pump bypass plug in the bottom return port.

3. Run the return line up through the furnace base to the return port of the pump. Run the other end of the line to the tank, using 3/8” O.D. copper tubing or 1/4” pipe with the ends capped, and routing the line so it stays clean.

4. Insert the return line through the second opening in the duplex bushing. If the bottom of the tank is lower than the pump intake, the tube should be inserted three or four inches from the tank bottom. If the bottom of the tank is higher than the pump intake, the return line should extend not more than 8” inside the tank.

If a two pipe system is used or if oil is taken from the bottom of the tank, a filter is recommended.

Hook-Up Procedure (See Figure 27)

1. Use a 3/8” O.D. copper tubing for the fuel line.

Cap the end with tape to keep out dirt while the line is being routed.

2. Install duplex bushing for two 3/8” lines in the top fitting of the tank.

3. Insert one end of the tubing through the duplex bushing until it is three to five inches from the bottom drain. Tighten the bushing.

4. Run the line where it will not be subject to damage. Also, make bends gradually and avoid kinks which might restrict oil flow.

5. Open the furnace door. Connect the oil line to the intake port on the pump. Tighten other port plugs on the pump.

6. Be sure oil line is airtight! Air leaks can cause the pump to lose prime and will create other problems such as nozzle failure, odors, rum-bling noise, and false safety shutdown.

7. Insert the short length of the copper tube level with the bottom of the duplex bushing. Form the tube into an inverted “U” to serve as a vent.

How to Eliminate Air Leaks To eliminate problems caused by air in the oil line, all connections in the oil supply line and all plugs, nuts, and fittings on the pump must be airtight. This includes the nut that covers the pressure adjustment. It is important that the hook-up be done carefully and with a good flaring tool.

To assure continuous operation, use a wire to jump terminals T-T (or F-F) on the primary control while burner is running. If furnace is equipped with the Honeywell R7184 primary control, priming oil pump procedure is as fol-lows:

1. While the ignition is on, press, for 1/2 second or less, and release the reset button. The lockout time will be extended to 4 minutes.

2. If prime is not established within the 4 min-utes, the control will lock out. Press the reset button to reset the control.

3. Repeat steps “1” and “2”, if needed, until the pump is fully primed.

When oil flow is clear and free of air bubbles, close air-bleed valve and tighten. (Time to bleed air out will vary depending on length of oil line, number of bends, etc.)

Fuel Oil Type Do not use fuel oil heavier than Grade No. 2.

Grade No. 1 may be used where the oil supply is subject to low temperatures.

DO NOT USE GASOLINE, CRANKCASE OIL,

OR ANY OIL CONTAINING GASOLINE.

! WARNING:

Failure to keep supply of oil clean by various procedures described above may cause failure of certain compo-nents such as the fuel pump gears, check valve, shaft seal, or burner nozzle which may result in a burner fire.

15. FLUE GAS SAMPLING

It may be necessary to take flue gas sampling from oil and gas gun furnaces (M1S and M1B Series Models) in order to check the perfor-mance after furnace installation. A flue gas sample may be taken from the heat exchanger, which is located behind the hole of the top-front of blower compartment.

1. STOP! Read the SAFETY INFORMATION.

2. Turn off all electric power to the appliance.

3. Remove the black plastic cap located above the blower and save.

4. Through the top of the blower compartment hole, drill a hole for your sampling tube into the heat exchanger.

5. Insert sampling tube through the drilled hole.

6. After a complete check and adjustment of furnace performance, fill the drilled hole with a screw that is larger than the hole.

7. Put silicon sealant (rated at least 500° F) around the screw.

8. Plug the outside hole with the plastic cap you removed in step 3.

! WARNING:

If you do not follow these instructions exactly, a fire or explosion may result causing personal injury, loss of life, or property damage.

16. LIGHTING AND SHUTDOWN

GENERAL-ALL MODELS

Read the safety information on the front page of these installation instructions before lighting furnace. DO NOT ATTEMPT TO LIGHT

FURNACE IF YOU SMELL GAS.

SAFETY INFORMATION

FOR YOUR SAFETY READ BEFORE LIGHT-

ING.

a. The first lighting of the furnace after any home setup must be performed by a qualified service technician.

b. If this appliance has a pilot that must be lit by hand, follow these instructions exactly.

c. BEFORE LIGHTING smell all around the furnace for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.

d. WHAT TO DO IF YOU SMELL GAS: Do not try to light any appliance. Do not touch any electric switch and do not use any phone in your building. Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions. If you cannot reach your gas supplier, call the fire depart-ment.

e. Use only your hand to push in the gas control lever. Never use tools. If the lever will not push in by hand, don’t try to repair it. Call a qualified service technician. Force or at-tempted repair may result in a fire or explo-sion.

f. Do not use this furnace if any part has been under water. Immediately call a qualified service technician to inspect the furnace and to replace any part of the gas valve or control system which has been under water.

LIGHTING INSTRUCTIONS FOR STAND-

ING PILOT MODELS.

a. Stop! Read the safety information.

b. Set the thermostat to the lowest setting.

c. Turn off all electric power to the appliance.

d. Push in the gas control lever slightly and move left to “OFF.” DO NOT FORCE.

e. Wait ten (10) minutes to clear out any gas.

If you then smell gas, STOP! Follow step “d” in the SAFETY INFORMATION. If you don’t smell gas, go to the next step.

f. Find pilot - follow metal tube (pilot tube) from gas control valve. Open hinged fire obser-vation door. The pilot is found at the end of the pilot tube just left of the pilot shield.

g. Slightly depress the gas control lever and move it right to the “ON” position and release;

then move it to the “PILOT” position.

h. Move the control lever to “SET” and hold.

Immediately light the pilot with a match.

Continue to hold the control lever for about one (1) minute after the pilot is lit. Release the lever and it will spring back to the “PILOT” position. Pilot should remain lit. If it goes out, repeat steps “d” through “h” above. If the lever does not spring back when released, stop and immediately call your service tech-nician or gas supplier. If the pilot will not stay lit after several tries, move the gas control lever to “OFF” and call your service techni-cian or gas supplier.

i. Move the gas control lever left to “ON”.

j. Turn on all electric power to the furnace. Set the thermostat to “Heat” and/or the desired temperature setting. Set the On-Off-Fan switch to “ON”.

k. Replace the furnace door.

Gas Control Lever

Pilot Adjustment

Figure 28. Standing Pilot Valve

Figure 29. Lighting Furnace

Pilot Bracket

! WARNING:

Close hinged fire door. If fire door is open or spring is broken it may allow products of combustion into the living space by the furnace blower resulting in possible asphyxiation.

In the event of any flashback or explosion, immediately shut off the furnace and call your service technician.

TO TURN OFF GAS TO APPLIANCE:

a. Set the thermostat to the lowest setting.

b. Turn off all electric power to the appliance at breaker or fuse box, before servicing.

c. Remove the furnace door.

d. Push in the gas control lever slightly and move to the left to “OFF.” DO NOT FORCE.

e. Replace the furnace door.

SEQUENCE OF OPERATION FOR STAND-

ING PILOT

a On a call for heat, the thermostat contacts close, supplying 24 VAC to the gas valve.

b. When the gas valve is energized it steps open at a reduced flow and opens fully after approximately 14 seconds.

c. When the call for heat is satisfied the thermo-stat contacts open, the gas valve shuts off gas flow.

SEQUENCE OF OPERATION FOR STAND-

ING PILOT W/INDUCED DRAFT BLOWERS

MODELS

a. On a call for heat, the thermostat contacts close, supplying 24 VAC to the relay.

b. The relay contacts close and energize the induced draft motor.

c. When the inducer starts, the air pressure switch closes at -0.20”WC differential pres-sure and energizes the gas valve.

d. When the gas valve is energized it steps open at a reduced flow and opens fully after approximately 14 seconds.

e. When the call for heat is satisfied the thermo-stat contacts open, the gas valve shuts off gas flow, and the induced draft blower stops.

GENERAL-DIRECT IGNITION MODELS

Read safety information on front page of these installation instructions before operating fur-nace. DO NOT ATTEMPT TO OPERATE

FURNACE IF YOU SMELL GAS.

Operating instructions for

M1M — MODELS WITH DIRECT IGNITION:

a. STOP! Read the SAFETY INFORMATION.

b. Set the thermostat to the lowest setting.

c. Turn off all electric power to the appliance.

d. This appliance is equipped with an ignition device which automatically lights the burner.

Do not try to light the burner by hand.

e. Honeywell - push in the gas control knob and turn clockwise to “OFF.” Robertshaw - push the gas control lever to “OFF.” NOTE: The lever cannot be placed in the “OFF” position unless it is pushed in slightly. DO NOT FORCE (See Figures 30 & 31).

f. Wait ten (10) minutes to clear out any gas. If you smell gas, STOP! and follow step “d” in the SAFETY INFORMATION section. If you do not smell gas, go to the next step.

g. Set the On-Off switch to the “ON” position.

h. Honeywell - turn knob on gas control counter clockwise to “ON.” Robertshaw - push the gas control lever to “ON.”

i. Turn on all electric power to the appliance.

j. Replace the furnace door.

k. Set the thermostat to “HEAT” and the desired temperature setting. The furnace should light after approximately 75 seconds. If the appli-ance will not operate, follow the instructions “To Turn Off Gas To Appliance” and call your service technician or gas supplier.

In the event of any flashback or explosion, immediately shut off the furnace and call your service technician.

TO TURN OFF GAS APPLIANCE:

a. Set the thermostat to the lowest setting.

b. Turn off all electric power to the appliance before servicing unit.

c. Set the ON-OFF switch to “OFF.”

d. Honeywell - push in the gas control knob and turn clockwise to “OFF.” Robertshaw - push the gas control lever to “OFF.”

e. Replace the furnace door.

SEQUENCE OF OPERATION FOR M1M

MODELS WITH DIRECT IGNITION

Direct ignition model furnaces do not have a pilot. Ignition is accomplished automatically by a silicon carbide hot surface ignitor. A control module takes care of all timing functions.