Nordyne M1GB 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 M1GB 077 Specifications

General

Brand	Nordyne
Model	M1GB 077
Category	Furnace
Heating Capacity	77, 000 BTU
Efficiency Rating	80%
Efficiency	80% AFUE
Blower Type	Multi-speed
Fuel Type	Natural Gas
Thermostat Compatibility	Standard

Summary

Installation Standards and Location

Installation Standards Compliance

Unit Location Requirements

Minimum Clearances

Return Air Provisions

Venting and Ducting

Installation Procedures

General Installation Steps

Details on floor, ceiling, and roof cut-out openings for furnace and roof jack installation.

Transit-Mode Venting Installation

Specific installation steps for transit-mode venting systems in manufactured homes.

Electrical and Fuel Systems

Electrical Wiring

Instructions for connecting power supply and thermostat wires to the furnace.

Fuel Piping

Guidelines for sizing and installing gas and oil fuel lines according to regulations.

Operation and Safety

Flue Gas Sampling

Procedure for taking flue gas samples for performance checks on oil and gas furnaces.

Lighting and Shutdown Procedures

Step-by-step instructions for lighting, operating, and shutting down the furnace.

Operating Instructions

Specific operating instructions for oil and gas gun furnaces, including sequence of operation.

Sequence of Operation

Details on how the furnace ignites and operates during a heating call.

Furnace Controls and Service

Furnace Controls and Functions

Burner Adjustments

Wiring Diagrams

Gas Atmospheric Furnace Wiring

Standing Pilot Furnace Wiring

Direct Ignition Furnace Wiring

M1(S,B) Furnace Series Wiring