Nordyne MMHB-090A AB PQ-02 User Manual

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Nordyne MMHB-090A AB PQ-02 Specifications

General

Brand	Nordyne
Model	MMHB-090A AB PQ-02
Category	Furnace
Language	English

Summary

General Safety Precautions

Installation, Maintenance, and Gas Leak Warnings

Warnings on improper installation, maintenance, and procedures for gas leaks.

Appliance Safety and Submersion Cautions

Cautions regarding overheating, gas supply failure, and submerged appliances.

Nordyne Limited Warranty Information

Warranty Limitations, Exclusions, and Coverage

Obtaining Warranty Service

Installer Information and Furnace Specifications

Unit Location, Clearances, and Air Provisions

Proper Placement, Clearances, and Return Air

Closet Installation Safety Precautions

Roof Jack Selection and Extension

Duct Connector Selection and Installation Basics

Duct Connector Selection and Floor Openings

Important Installation Notes and Warnings

Furnace Installation Procedures

Cutting Openings and Mounting Components

Instructions for cutting ceiling/roof openings and installing mounting plates.

Installing Duct Connectors

Furnace and Roof Jack Installation Steps

Securing the Furnace Unit to Ductwork

Attaching the Roof Jack Assembly

Transit-Mode Venting System Installation

Venting System Installation Steps

Venting System Safety Warnings

Electrical Wiring and Thermostat Connections

Power Supply and Control Wiring

Instructions for connecting the main power supply and low-voltage control wires.

Thermostat Wiring and Anticipator Setting

Guide to connecting thermostat wires and setting the anticipator for optimal performance.

Fuel Piping and Gas Conversion Procedures

Fuel Line Installation and Gas Types

Gas Conversion Safety Warning

Lighting, Shutdown, and Safety Procedures

Fueling and Pre-Lighting Safety Checks

Steps for connecting fuel, priming, and performing pre-lighting safety checks.

Gas Leak Safety and Pilot Lighting

Handling gas leaks and instructions for lighting standing pilot models.

Standing Pilot Operation and Shutdown

Manual Pilot Lighting and Control Lever

Detailed steps for lighting the pilot and operating the gas control lever.

Appliance Shutdown and Sequence Overview

Procedure for turning off the gas appliance and understanding operational sequences.

Direct Ignition and Gun Furnace Operation

Direct Ignition Model Startup Procedures

Instructions for starting and operating furnaces with direct ignition systems.

Oil and Gas Gun Furnace Operations

Operating procedures for oil and gas gun furnace models, including sequences.

Gas Gun Furnace Operation and Safety

Gas Gun Model Startup and Safety

Steps for operating gas gun models, including pre-ignition checks and safety.

Gas Gun Sequence and Lockout Procedures

Details the ignition sequence and lockout procedures for gas gun models.

Service Guide and Adjustments

Burner Adjustments and Gas Pressure

Combustion Air and Gas Conversion

Troubleshooting Standing Pilot and Direct Ignition Models

Pilot Ignition and Flame Quality Issues

Diagnosing no burner/pilot ignition, poor flame, and high gas bills.

Direct Ignition and Blower Problems

Troubleshooting ignition, motor, heat, and blower issues in direct ignition furnaces.

Advanced Troubleshooting and Diagnostics

Ignition, Control Module, and Lockout Issues

Diagnosing ignitor, control module faults, burner lockouts, and short cycling.

Blower Operation and Insufficient Heat

Troubleshooting blower issues and diagnosing insufficient heat conditions.

Routine Maintenance Procedures

Homeowner Maintenance Tasks

Serviceman Scheduled Maintenance

Optional AC Integration and Component Warnings

Wiring Diagrams

Wiring Diagrams (Continued)

Supplement: Installation Sequence