Nordyne M1B Owner's Manual And Installation Instructions

Nordyne M1B Owner's Manual And Installation Instructions

Downflow, direct vent (sealed combustion) forced air gas and oil furnaces

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Downflow, Direct Vent (Sealed Combustion)
Forced Air Gas and Oil Furnaces
Owners Manual/Installation Instructions
Series M1B, M1G, M1M and M1S
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.
LEAVE THESE INSTRUCTIONS WITH THE HOMEOWNER.
!
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.

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Summary of Contents for Nordyne M1B

  • Page 1 Downflow, Direct Vent (Sealed Combustion) Forced Air Gas and Oil Furnaces Owners Manual/Installation Instructions Series M1B, M1G, M1M and M1S 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...
  • Page 2: Table Of Contents

    12. INSTALLATION OF TRANSIT-MODE VENTING SYSTEM ... 14 13. ELECTRICAL WIRING ... 15 14. FUEL PIPING ... 16 15. FLUE GAS SAMPLING ... 19 16. LIGHTING AND FURNACE SHUT DOWN ... 20 17. SERVICE GUIDE ... 25 18. MAINTENANCE ... 30 19. OPTIONAL ACCESSORIES ... 31 20.
  • Page 3: Specifications

    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...
  • Page 4: Specifications

    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.
  • Page 5: Overall Furnace Dimensions

    • 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.
  • Page 6: Unit Location

    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...
  • Page 7 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. Approx. Length Model Number Below Flashing (F,S)AW(T)1523-(0,2,4)(A,S)
  • Page 8: Air Distribution Systems

    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...
  • Page 9: Duct Connector Selection

    10. DUCT CONNECTOR SELECTION 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). FLOOR CAVITY (depth equal to "X"...
  • Page 10 23 -1/4" FUEL LINE HOLE 20" 14-1/2" REAR WALL OF CLOSET OR ALCOVE FLOOR CUT-OUT FOR DUCT CONN. FLOOR CUT-OUT FOR OPTIONAL COOLING COIL FOR NON-PLATINUM SERIES UNITS 10" 12-7/8" 14-3/4" 15-1/2" 2-3/4" FUEL-LINE 3/4" 2" 1-3/4" FURNACE OUTER DOOR...
  • Page 11: Installation

    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.
  • Page 12 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.
  • Page 13 (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.
  • Page 14: Installation Of Transit-Mode Venting System

    (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),...
  • Page 15: Electrical Wiring

    (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.
  • Page 16: Fuel Piping

    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. On-Off Switch...
  • Page 17 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"...
  • Page 19 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”...
  • Page 20: Flue Gas Sampling

    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.
  • Page 21 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.
  • Page 22 “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.
  • Page 23 M1 gas gun furnaces may be converted to oil gun in the field by using the proper conversion kit listed in the RPL. If your furnace model number begins with M1B*, the furnace does not have a pilot. Ignition is...
  • Page 24 45 seconds. b. After this sequence, the control module tests to see if flame is sensed. If it has, the furnace continues to heat until the thermostat is satisfied. c. If the burner has not lit, the ignition sequence is repeated a maximum of two more times.
  • Page 25: Service Guide

    The valve is a “step-open” type for M1G*- models and “slow-open” for M1M*- and M1B*- models which means it opens to a “low-fire” position, and after a few seconds, “steps- open”...
  • Page 26 Improper air adjustment may cause unsafe operation, explosion and/or and Smoke fire asphyxiation. • If the input to the furnace is too great because of excessive gas pressure, wrong size nozzle or orifice, high alti- tude, etc., the burner flame will be...
  • Page 27 Orifice is located at the end of the spud (M1G*,M1M*),or re- move three (3) bolts from U-shaped manifold plate and orifice assembly (M1B*). e. Replace the main orifice with the L.P. gas orifice supplied in the envelope located by the gas valve.
  • Page 28 LED is lit. If flame sense is weak, yellow LED will flash. Control Module Status Indicator - M1B a. One flash-the control is in lock-out because the inducer centrifu gal switch is or was stuck closed.
  • Page 29 Check the electrical supply to the furnace. b. Be sure the furnace On-Off switch is in the “ON” position. c. Defective thermostat circuit - white and red thermostat low voltage leads (M1M*, M1B* models). If the burner motor or combustion fan runs, check: • Thermostat connections •...
  • Page 30 Honeywell R7184 oil gun control only. Burner does not start with a call for heat. 1. Check the electrical supply to the furnace. 2. Be sure the furnace door switch is in the on position. 3 Check for line voltage at the oil primary control.
  • Page 31: Maintenance

    Listed NORDYNE air conditioning components are speci- fied on the furnace label. ADDITIONAL OIL...
  • Page 32 Route Thermostat wire to intended Platinum Series AC/HP location. Coil and secure extra six feet of wire to home's undercarriage. Platinum Ready Wiring Figure 39. Thermostat Wiring A/C Ready Models M1* A/C Ready Thermostat Furnace White Green Yellow Standard Wiring M1* A/C Ready Furnace...
  • Page 33 Table 11. A/C Blower Selection The furnace must also be equipped with an automatic damper (See Figures 37 or NORDYNE p/n 901996 for furnaces without coil cavity, or p/n 901083 with coil cavity) to prevent cold air from being discharged up around the heat exchanger.
  • Page 34: Wiring Diagrams

    WHITE GRAY BLACK BLACK BLUE FUSE BLACK BLACK...
  • Page 35 BLACK BLACK WHITE FUSE GRAY BLACK BLACK BLACK BLACK BLACK...
  • Page 36 (MED. (HIGH) WHITE GRAY WHITE (LOW) (MED. BLUE (HIGH) BLACK WHITE ORANGE (MED. BLUE BLACK (LOW) GREEN FUSE ORANGE BLACK BLACK...
  • Page 37 WHITE (MED. ORANGE (MED. BLUE (HIGH) BLACK (LOW) WHITE FUSE GREEN GRAY WHITE (LOW) (MED. BLUE (HIGH) BLACK BLACK BLACK GREEN GRAY...
  • Page 38 WHITE (MED. ORANGE (MED. BLUE (HIGH) BLACK (LO) WHITE (LO) (MED. BLUE (HIGH) BLACK WHITE GREEN GRAY BLACK BLACK Table YELLOW YELLOW BLACK...
  • Page 39 BUSHING BLACK BLACK WHITE FUSE GREEN GRAY BLACK BLACK WHITE (MED ORANGE (MED. BLUE (HIGH) BLACK NOTE (SEE (LO) WHITE (LO) (MEDHI) BLUE (HI) BLACK BLACK WHITE WHITE BLUE VIOLET GREEN GRAY BLACK WHITE...
  • Page 40: Equivalent Orifice Sizes At High Altitudes

    OUTPUT- MBTUH ORIFICE SIZE - NAT. GAS M1G 090 ORIFICE SIZE - LP OUTPUT- MBTUH ORIFICE SIZE - NAT. GAS M1B 066 ORIFICE SIZE - LP OUTPUT- MBTUH ORIFICE SIZE - NAT. GAS M1B 086 ORIFICE SIZE - LP OUTPUT- MBTUH Reference Sources: ANSI Z233.1 &...

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