Nordyne M1MB 070 User Manual

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 fi re or explosion
may result causing property damage,
personal injury or loss of life.
– Do not store or use gasoline or
other fl ammable vapors 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 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 fi re department.
– Installation and service must be
performed by a qualifi ed installer,
service agency or the gas sup-
plier.
WARNING:
Should overheating occur, or the gas
supply fail to shut off, shut off the man-
ual 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
qualifi ed installer, service agency or
the gas supplier.
Owners Manual/Installation Instructions
Series M1B, M1G, M1M and M1S
Downfl ow, Direct Vent (Sealed Combustion)
Forced Air Gas and Oil Furnaces
LEAVE THESE INSTRUCTIONS WITH THE HOMEOWNER.

Nordyne M1MB 070 Specifications

General

Brand	Nordyne
Model	M1MB 070
Efficiency	80%
Input Voltage	120V
Vent Size	4 inches
BTU	70000 BTU
Gas Type	Natural Gas

Summary

Safety and Installation Warnings

General Safety Warnings

Critical safety warnings related to fire, explosion, and gas hazards.

Gas Leak Safety Procedure

Steps to follow if a gas leak is detected, emphasizing immediate evacuation and professional help.

Overheating and Gas Shutoff Procedure

Instructions for shutting off the furnace in case of overheating or gas supply failure.

Furnace Specifications and Owner Responsibilities

Manufacturer Warranty and Owner Responsibilities

Details on warranty coverage and homeowner responsibilities for proper setup and operation.

Installation Standards and Clearances

Installation Cautionary Notes

Warnings against altering, repairing, or operating a malfunctioning furnace without qualified assistance.

Installation Standards Compliance

Requirements for complying with H.U.D. and ANSI/NFPA standards for furnace installation.

Unit Location and Return Air

Installation Standards and Codes

Lists applicable ANSI, NFPA, CSA, and UL standards for furnace installation.

Duct Connector and Furnace Installation

General Furnace Installation Steps

Outlines the initial steps for furnace installation, including floor and ceiling cut-outs.

Furnace Cut-Out Location Details

Furnace Installation and Venting System

Transit-Mode Venting System Installation

Instructions for installing the transit-mode venting system, including roof jacks and warning tags.

Electrical Wiring Procedures and Safety

Electrical Wiring Safety Precautions

Cautions regarding labeling wires, wiring errors, and proper operation verification.

Connecting Power Supply and Thermostat Wires

Detailed instructions for connecting power supply and thermostat wiring to the furnace.

Fuel Piping and Gas Conversion

Gas Pressure and Manifold Settings

Details on gas pressure requirements and regulator settings for natural and LP gas.

Oil Piping Diagram

Fuel Line Hook-Up and Air Leak Prevention

Eliminating Air Leaks in Oil Lines

Flue Gas Sampling and Lighting Procedures

Safety Before Lighting Furnace

Critical safety information and warnings to read before attempting to light the furnace.

Standing Pilot Lighting Instructions

Step-by-step guide for lighting furnaces with a standing pilot ignition system.

Pilot Valve Operation and Gas Shutdown

Turning Off Gas to Appliance Procedure

Direct Ignition Furnace Operation

Direct Ignition Model Operating Instructions

How to operate M1M models with direct ignition, including safety checks.

Oil and Gas Gun Furnace Operation

Oil Gun Furnace Operating Instructions

Gas Gun Furnace Operation and Safety

Gas Gun Model Operating Instructions

Instructions for operating M1 gas gun furnaces, including safety and lighting.

Furnace Operation Troubleshooting

Basic troubleshooting steps if the furnace does not light or has flashback/explosion.

Service Guide and Burner Adjustments

Burner Adjustments and Gas Pressure Settings

Procedures for adjusting burner settings, gas pressure, and pilot flame.

Combustion Air and Burner Settings

Combustion Air Requirements and Factors

Gas Conversion and Standing Pilot Troubleshooting

Gas Conversion Procedure from Natural to LP

Steps to convert the furnace from natural gas to LP gas.

Standing Pilot Main Burner Troubleshooting

Common issues and checks when the main burner does not come on.

Control Module Status Indicators

M1M Series Control Status Codes

M1B Series Control Lockout Codes

Direct Ignition Furnace Troubleshooting

Main Flame Not Burning Properly Checks

Burner Motor Not Running Troubleshooting

Steps when the burner motor doesn't run despite a call for heat.

Combustion Blower Runs With No Flame Troubleshooting

Steps to troubleshoot when the combustion blower runs but there is no flame.

Oil Gun Furnace Troubleshooting

Oil Gun Burner Not Starting Troubleshooting

Troubleshooting steps for oil gun furnaces when the burner fails to start.

Furnace Maintenance Procedures

Serviceman Periodic Maintenance Checks

Wiring Diagrams - Gas Furnaces

Gas Atmospheric Furnace Wiring Diagram

Wiring Diagrams - Induced Draft Furnaces

Standing Pilot Induced Draft Furnace Wiring

Wiring Diagrams - A/C Ready Gas Furnaces

A/C Ready Gas Atmospheric Furnace Wiring

Wiring Diagrams - A/C Ready Induced Draft Furnaces

A/C Ready Induced Draft Furnace Wiring

Wiring Diagrams - Direct Ignition Furnaces

Direct Ignition Furnace Wiring Diagram

Wiring diagram for M1M gas direct ignition furnaces with A/C readiness.

Wiring Diagrams - Gas and Oil Furnaces

Gas and Oil Furnace Wiring Diagram

Wiring diagram for M1 (B, S) gas and oil furnaces with A/C readiness.

High Altitude Orifice Sizing

Equivalent Orifice Sizes at High Altitudes

Table providing orifice sizes for various altitudes to ensure proper operation.