Nordyne MMHB-077A AA FC-02 User Manual

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Nordyne MMHB-077A AA FC-02 Specifications

General

Blower Motor	Multi-Speed
Ignition Type	Direct Spark Ignition
Weight	120 lbs
BTU	77, 000 BTU
Fuel Type	Natural Gas
Vent Diameter	4 inches

Summary

Limited Warranty

Warranty Coverage and Limitations

Details coverage periods, exclusions, and limitations.

Owner Responsibilities and Service

Outlines homeowner duties and steps for obtaining service.

Notice to Installer

About Your Central Furnace System

Manufacturer Warranty and Owner Responsibilities

Details manufacturer's warranty terms and homeowner's obligations.

Installation Standards

Installation

Cut Floor Opening and Fuel Line Hole

Instructions for creating necessary openings in the floor.

Install Furnace

Install Roof Jack

Installation of Transit-Mode Venting System

Electrical Wiring

Electrical Branch Supply Circuits

Guidelines for routing and connecting electrical supply circuits.

Connect Power Supply Wires

Instructions for connecting the main power supply wires.

Connect Thermostat Wires

Fuel Piping

Safety Information

Lighting Instructions for Standing Pilot Models

Standing Pilot Models Operation

Lighting and Shut Down Procedures

Includes lighting instructions, shut down, and safety warnings.

General-Direct Ignition Models

Operating Instructions for MM-Models with Direct Ignition

Startup, Shutdown, and Sequence

Operating Instructions for Oil and Gas Gun Furnace

Gas Gun Models Operation

What to Do If You Smell Gas

Emergency procedures for gas leaks.

To Turn Off Gas Appliance

Service Guide

Burner Adjustments

Combustion Air Adjustments

Gas Conversion Procedure

Steps for converting the furnace from natural gas to LP gas.

Troubleshooting Standing Pilot Models

Burner, Pilot, and Gas Issues

Addresses main burner ignition, pilot light, gas valve, and gas bill problems.

Troubleshooting Direct Ignition Models

Ignition, Gas Flow, and Blower Issues

Solves ignition, gas flow, motor, and blower problems.

Direct Ignition Furnace Troubleshooting Continued

Combustion Blower and Ignitor Issues

Troubleshoots combustion blower, ignitor, and control module errors.

Furnace Maintenance

Serviceman Maintenance Tasks

Wiring Diagrams

Gas Atmospheric Furnaces (MGHA)

Gas Atmospheric Furnace Wiring Diagrams

Gas Furnace Wiring Diagrams

MGHB 077 Model

Standing Pilot w/Induced Draft Furnace Wiring Diagrams

MGHB and MGBB Models

MGHA 090 PQ Model

Installation Sequence for Standing Pilot and Induced Draft Blowers