Nordyne M1MB 077 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 077 Specifications

General

Brand	Nordyne
Model	M1MB 077
Heating Capacity	77, 000 BTU
Efficiency Rating	80% AFUE
Blower Type	Multi-speed
Fuel Type	Natural Gas
Type	Furnace

Summary

Installation Standards

Minimum Clearances

Roof Jack Selection

Installation Procedures

Cut-Out Location Details

Details precise measurements for floor, ceiling, and fuel line openings.

Furnace Mounting and Duct Connection

Ceiling and Roof Opening Procedures

Transit-Mode Venting System Installation

Transit-Mode Venting System Steps

Covers mounting the roof jack crown and attaching warning tags for the venting system.

Electrical Wiring

Power Supply and Thermostat Wiring

Step-by-step instructions for wiring the power supply and thermostat to the furnace.

Fuel Piping

Gas Piping Installation Regulations

Details compliance with federal, state, and local regulations for gas piping.

Oil Tank and Piping Installation

Fuel Line Hook-Up Procedures

Oil Pump Priming and Air Leak Elimination

Lighting and Shutdown Procedures

Pre-Lighting Safety Information

Crucial safety warnings and procedures to follow before attempting to light the furnace.

Standing Pilot Lighting Instructions

Detailed steps for lighting the pilot on standing pilot models.

Turning Off Gas to Appliance

Direct Ignition Models Operating Instructions

Direct Ignition Sequence of Operation

Oil and Gas Gun Furnace Operation

Oil Furnace Control Sequence

Troubleshooting Gas Gun Furnaces

Furnace Controls and Functions

Service Guide

Burner Adjustments

Covers factory settings and necessary readjustments for gas pressure and pilot flame.

Combustion Air Requirements

Gas Gun Combustion Air Adjustment

Gas Conversion Procedures

Troubleshooting Standing Pilot Models

Control Module Status Indicators

Pilot Will Not Light or Goes Out

Troubleshooting Direct Ignition Furnaces

Burner Motor Not Running

Ignitor Does Not Heat Up

Troubleshooting Oil Gun Furnaces

Burner Does Not Start

Maintenance

Homeowner Maintenance Tasks

Serviceman Periodic Maintenance

Wiring Diagrams

Equivalent Orifice Sizes at High Altitudes