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Nordyne M1G - page 1
For installation in: 1. Manufactured Homes 2. Recreational Vehicles, Park Models, Manufactured Buildings 3. Modular Homes/Buildings ! W ARNING: 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 ...
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Nordyne M1G - page 2
2 TABLE OF CONTENTS 1. SPECIFI CATIONS ................................................................................... 3 2. OWNERS INFORMATION ....................................................................... 3 3. MANUFACTURER WARRANTY, OWNER RESPONSIBILITY ................. 3 4. INSTALLATION STANDARDS .................................... ...
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Nordyne M1G - page 3
3 ! W ARNING: 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 warning ...
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Nordyne M1G - page 4
4 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 b ...
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Nordyne M1G - page 5
5 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. ! CA UTION: • 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 unsaf ...
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Nordyne M1G - page 6
6 ALL M O DE L S CLO S E T AL COV E F ront 6" 18" B ac k 0" 0" Sid e s 0 " 0" Ro of J ac k 0" 0" To p 6" 6 " T op and S i de s of Duc t 0" 0 " Bo tto m o f D u ct B Ca binet 0" 0" A Ca binet (w / c oil box) 0" 0" A Ca binet (w / o c oil box ) 1/4" 1/4" Table 4 ...
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Nordyne M1G - page 7
7 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= SLA T FLASHING F= FLA T FLASHING O= TYPE; ST ANDARD H= HIGH WIND A= ARCTIC ROOF JACK T= TRANSIT MODE TYPE MIN. ADJ. LENGTH MAX. ADJ.LENGTH 5 = 5" FLUE DIA. M ODEL AP P ROX . ADJ. NUMBE R LE NG THS* BELO ...
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Nordyne M1G - page 8
8 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 sn ...
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Nordyne M1G - page 9
9 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 ...
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Nordyne M1G - page 10
10 Figure 12. Closet or Alcove CEILING AND ROOF OPENINGS C L C L 13-1/2" 10" 23 -1/4" FLOOR OPENING C L C L A LT. FUEL L INE HOLES SIDE WALL REAR W ALL FUEL LINE HOLE FLOOR CUT-OUT FOR DUCT CONN. CEILING CUT-OUT FOR FLUE AND ROOF JACK (See Fig 12) C L C L C L C L 24" 23-1/4" 21-3/4" 14-1/2" 2-1/4" 2-3/4" ...
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Nordyne M1G - page 11
11 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 ...
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Nordyne M1G - page 12
12 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 al ...
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Nordyne M1G - page 13
13 Staple Folded Duct Flap (typ) to side of Duc t 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&qu ...
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Nordyne M1G - page 14
14 MTG. PLATE TABS SLIDE FURNACE ALL THE WAY BACK ONTO MTG. PLATE SU P PLY A IR D U C T Knockout O ver H oles 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”, & Pl ...
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Nordyne M1G - page 15
15 c . Venting system warning tags to be removed and discarded. ! W ARNING: 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 yo ...
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Nordyne M1G - page 16
16 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 b ...
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Nordyne M1G - page 17
17 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 f ...
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Nordyne M1G - page 18
18 Figure 27. Typical Oil Piping for Above Ground (Single-Line) Supply If fuel pump fails to lift oil, check for air port plug and repeat priming procedure. leaks and tighten all fuel fittings. Re- prime fuel pump by injecting fuel oil into optional (top) return port. Replace return R Top of Tank 8 ft. Shut-off Valve Optional Fuel Filter Alternate ...
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Nordyne M1G - page 19
19 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 Syste ...
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Nordyne M1G - page 20
20 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 IN ...
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Nordyne M1G - page 21
21 Gas Control Lever Pilot Adjustment Figure 28. Standing Pilot Valve Figure 29. Lighting Furnace Pilot Bracket ! W ARNING: 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, i ...
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Nordyne M1G - page 22
22 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 ...
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Nordyne M1G - page 23
23 remains open if flame is sensed, or closes if flame is not sensed. e. If flame is not sensed, the entire sequence is repeated four more times before “lockout” occurs. To reset, wait 30 seconds and then interrupt the 24 VAC power by turning the room thermostat below room temperature, then returning it to the original set point. f. If flame is ...
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Nordyne M1G - page 24
24 accomplished automatically by a silicon car- bide hot surface ignitor. A control module takes care of all lighting and timing functions. There are no external relays or timing devices. Do not try to light this furnace manually. The control module is not field serviceable. 1. Before operation, smell all around the fur- nace for gas. Be sure to sm ...
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Nordyne M1G - page 25
25 2. Limit Control - This furnace is protected by two high temperature safety limit switches. The auxiliary (upper) limit switch and the high temperature (lower) limit switch are auto- matic reset types. If either limit trips, the burner will shut off. If either limit switch trips off again soon after resetting, set the furnace On-Off switch to th ...
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Nordyne M1G - page 26
26 5/32” GAP ELECTRODE NOZZLE 0-1/16” 5/16” ABOVE CL Gently tighten the lock nuts after completing the adjustment. For best results, use instrument to measure between 8-9% CO 2 , after the com- bustion air has been adjusted. Note: Do not over-tighten the lock nuts, otherwise the plastic air shutter may be damaged. Oil Gun Only It is recommend ...
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Nordyne M1G - page 27
27 d. To remove the gas valve assembly, remove screw(s) from gas valve bracket. Gas valve and spud may be removed. 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 g ...
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Nordyne M1G - page 28
28 may be defective. Replace the gas valve if necessary. e. Be sure the pilot shield is in place. f. Check for gas leaks in the pilot line or the pilot assembly. g. Check the flue assembly to make sure all connections are tight. h. See the FURNACE START-UP procedure for lighting details. Main Flame Is Not Burning Properly a. Check the manifold gas ...
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Nordyne M1G - page 29
29 humidity requires higher temperatures for the same level of comfort. Check for proper humidity level in the home. TROUBLESHOOTING - DIRECT IGNITION FURNACES INCLUDING GAS GUN Burner Motor Does Not Run— Thermostat Calls For Heat a. Check the electrical supply to the furnace. b. Be sure the furnace On-Off switch is in the “ON” position. c . ...
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Nordyne M1G - page 30
30 c . If no power to combustion blower then check wiring and control module; replace if neces- sary. Circulation Air Blower Will Not Operate Even Though The Burner Does Operate a. Check thermostat “G” wiring. b. Check wiring to motor. c . Check for a defective motor. TROUBLESHOOTING - OIL GUN Honeywell R7184 oil gun control only. Burner does n ...
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Nordyne M1G - page 31
31 ! W ARNING: Do not obstruct any return air open- ings, including the grille on the fur- nace. To do so may cause the furnace to activate the high limit and shut down, or it may cause asphyxiation. 18. MAINTENANCE By Homeowner 1. Return Air - On some closet installations the return air opening to the furnace may be on the floor, on the door, on t ...
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Nordyne M1G - page 32
32 Figure 39. Thermostat Wiring A/C Ready Models Figure 37. Coil Cavity Damper (Non-Platinum Series Only) Figure 38. Damper without Coil Cavity (Non-Platinum Series Only) Rc R H W G Y Red White Green Yellow Red White Green Grey ** Thermostat M1* A/C Ready Furnace Route Thermostat wire to intended Platinum Series AC/HP location. Coil and secure extr ...
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Nordyne M1G - page 33
33 T able 11. A/C Blo wer Selection Blo wer S p eed S el ecti o n Ch art for M 1*C Mo d el s and for u se wi th Bl ow er Ki t No. 903413 1/ 2 Hp 4 S p eed Heat i n g Coo l i n g S peed / E vap Coi l S p eed 2-1/ 2 To n Fu rn ace I n p ut S etti ng & 3 To n 077, 086, 090 M L L ML M H H 056, 066, 070 L L ML M H H 2 T o n 4 T o n 3-1/ 2 Ton Blo we ...
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Nordyne M1G - page 34
34 20. WIRING DIAGRAMS 703887B Figure 40. Gas Atmospheric Furnace, M1GH 056, 070 Models Gas Atmospheric Furnaces, M1GH 056, 070 ON/OFF SWITCH GAS VALVE FAN SWITCH HI-LIMIT AUX. LIMIT TRANSFORMER L1 N C R 24 V 115 V WHITE WHITE WHITE GRAY BLUE BLACK GRAY FAN ON/AUTO SWITCH ORANGE ORANGE BLACK L1 NEUTRAL GROUND SCREW FURNACE ELECTRICAL BOX BLACK 3A F ...
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Nordyne M1G - page 35
35 703888C Figure 41. Standing Pilot with Induced Draft Furnace, M1GH 077, 090 Models 1 5 2 3 6 4 GAS VALVE FAN SWITCH HI-LIMIT AUX. LIMIT PRESSURE SWITCH COMBUSTION FAN L1 N C R 24 V 115 V BLACK BLACK BLACK BLUE BLACK WHITE WHITE WHITE WHITE GRAY GRAY BLUE BLUE 2 1 GRAY SUPPLIED BY INSTALLER FAN ON/AUTO SWITCH BLUE BLACK ORANGE ORANGE L1 NEUTRAL G ...
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Nordyne M1G - page 36
36 710150 08/00 Figure 42. Gas Atmospheric Furnace, A/C Ready, M1G (B, C, D) 056, 070 Models RED (LOW) BLACK (HIGH) BLUE (MED. HI) ORANGE (MED. LO) 1 5 2 A/C BLOWER RELAY 3 6 4 ON/OFF SWITCH GAS VALVE FAN SWITCH HI-LIMIT AUX. LIMIT TRANSFORMER L1 N C R 24 V 115 V BLACK ORANGE BLUE ORANGE GREEN WHITE WHITE WHITE BLACK GRAY BLUE BLUE BLACK VENT SWITC ...
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Nordyne M1G - page 37
37 Figure 43. Standing Pilot with Induced Draft Furnace, A/C Ready M1G (B, C, D) 077, 090 Models 1 5 2 A/C BLOWER RELAY 3 6 4 1 5 2 COMBUSTION BLOWER RELAY 3 6 4 ON/OFF SWITCH GAS VALVE HI-LIMIT AUX. LIMIT TRANSFORMER PRESSURE SWITCH COMBUSTION FAN L1 N C R 24 V 115 V BLACK BLACK BLACK BLACK BLACK ORANGE ORANGE GREEN WHITE WHITE WHITE WHITE GRAY GR ...
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Nordyne M1G - page 38
38 See Table BLOWER MOTOR SINGLE SPEED ON/OFF SWITCH C R G W GAS VALVE HI-LIMIT AUX. LIMIT TRANS- FORMER PRESSURE SWITCH 6 5 4 3 2 1 6 5 4 3 2 1 COMBUSTION FAN L1 N C R 24 V 115 V 2 1 1 4 5 2 6 3 1 2 3 4 5 6 7 8 9 IGNITOR BLUE BLUE BLACK GREEN YELLOW YELLOW BLACK BLACK ORANGE ORANGE BLACK WHITE L1 NEUTRAL GROUND SCREW FURNACE ELECTRICAL BOX 24V N E ...
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Nordyne M1G - page 39
39 7104670 04/04 Figure 45. Gas and Oil Furnaces, A/C Ready - M1 (B, S) 066, 086 Models 1 5 2 A/C BLOWER RELAY 3 6 4 FAN SWITCH HI-LIMIT AUX. LIMIT TRANSFORMER L1 N C R 24 V 115 V BLACK GREEN WHITE WHITE WHITE GRAY BLUE GRAY BLUE BLACK BLACK CR W BLUE BLACK ORANGE ORANGE L1 NEUTRAL GROUND SCREW FURNACE ELECTRICAL BOX RED TIE WIRE WHITE RED 3A FUSE ...
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Nordyne M1G - page 40
¢708672;¤ 7086720 O’Fallon, MO 7086720 (Replaces 708074E) Specifications and illustrations subject to change without notice and without incurring obligations. Printed in U.S.A. (12/06) INST ALLER: Please leav e these installation instructions with the homeowner . 21. EQUIVALENT ORIFICE SIZES AT HIGH ALTITUDES (Includes 4% Input Reduction for Ea ...
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