Nordyne MGHA-070A AA FC-02 User Manual

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Nordyne MGHA-070A AA FC-02 Specifications

General

Weight	120 lbs
BTU	70000 BTU
Fuel Type	Natural Gas
Efficiency	80%
Vent Size	4 inches

Summary

Installation Instructions/Owners Manual

For Your Safety

Crucial safety information including gas leak procedures and water damage warnings.

NORDYNE LIMITED WARRANTY

Five Year Parts and Two Year Labor Coverage

Details the duration and scope of warranty coverage for parts and labor.

Manufacturer Warranty, Owner's Responsibilities

4. Installation Standards

9. Roof Jack Selection

11. Installation

Cut Out Floor Opening & Fuel Line Hole

Procedure for creating floor openings for furnace installation.

Cut Out Ceiling and Roof Openings

Steps for cutting openings for roof jack and flue.

Cut Duct Opening

Install Furnace Mounting Plate

Install Duct Connector

12. Installation of Transit-Mode Venting System

13. Electrical Wiring

Connect Power Supply Wires

Guide for connecting the main power supply to the furnace.

Connect Thermostat Wires

Instructions for wiring the thermostat to the furnace.

14. Fuel Piping

Lighting Procedures

Lighting Instructions for Standing Pilot Models

Step-by-step guide for lighting pilot models.

OPERATING INSTRUCTIONS FOR MM-MODELS WITH DIRECT IGNITION

Operating Instructions for Oil and Gas Gun Furnace

Operating procedures for oil and gas gun furnace models.

THE FURNACE CONTROLS AND FUNCTIONS

16. SERVICE GUIDE

Burner Adjustments

Procedures for adjusting burner settings for optimal performance.

Combustion Air-Gas Gun Models

Gas Conversion

Steps to convert the furnace from natural gas to L.P. gas.

TROUBLESHOOTING - STANDING PILOT MODELS

Main Burner Does Not Come On

Troubleshooting steps for when the main burner fails to ignite.

Gas Valve Powered (24 volts)- No Main Flame

Diagnosing issues when gas valve receives power but no flame.

Pilot Will Not Light or Goes Out

Steps to troubleshoot pilot light failures.

TROUBLESHOOTING - DIRECT IGNITION FURNACES INCLUDING GAS GUN

Burner Motor Does Run - No Flame

Diagnosing no flame when the burner motor is running.

Control Module Is Powered-Ignitor Does Not Heat Up

Troubleshooting ignitor issues when control module is powered.

Main Flame Ignites-Burner Locks Out

Steps for when the flame ignites but the burner locks out.

MAINTENANCE

WIRING DIAGRAMS

REPLACEMENT PARTS LIST

MG(H,B)(A,B) and MM(H,B)(A,B) Series Gas Furnace Parts List

MG(H,B)(A,B) and MM(H,B)(A,B) Series Gas Furnace Parts List (Continued)

MG(-)A and MM(-)A SERIES GAS FURNACE PARTS LIST

MG/MM SERIES GAS FURNACE PARTS LIST

Supplement to Owner's Information Installation Instructions