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Lennox G71MPP-36B-070

Lennox G71MPP-36B-070
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_ 2007 Lennox Industries Inc.
Dallas, Texas, USA
INSTALLATION
INSTRUCTIONS
G71MPP SERIES UNITS
GAS UNITS
Technical
50&334M
03/2008 J LJ _,Publications
Litho U.S.A.
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
Unit Dimensions ............................... 2
G71MPP Parts Arrangement ..................... 3
Shipping and Packing List ....................... 4
Safety Information .............................. 4
General ....................................... 6
Installation - Setting Equipment .................. 6
Filters ........................................ 12
Duct System .................................. 13
Pipe & Fittings Specifications ................... 13
Vent Pipe Sizing Worksheet .................... 14
Vent Piping Guidelines ......................... 15
Joint Cementing Procedure ..................... 16
Venting Practices ............................. 17
Gas Piping ................................... 25
Electrical ..................................... 27
Integrated Control ............................. 33
Blower Motor Performance ..................... 40
Unit Start-Up ................................. 51
Gas Pressure Measurement .................... 52 ,
High Altitude Information ....................... 53
Other Unit Adjustments ........................ 54
Heating Sequence of Operation ................. 55
Service ...................................... 57
Ignition Control Diagnostic Codes ............... 59
Troubleshooting ............................... 60
Repair Parts List .............................. 66
Start-Up & Performance Check List .............. 66
AWARNING
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other ap-
pliance.
Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
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 building.
Leave the building immediately.
Immediately call your gas supplier from a
neighbor's phone. Follow the gas supplier's
instructions.
If you cannot reach your gas supplier, call
the fire department.
03/08
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505,334M
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Table of Contents

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Lennox G71MPP-36B-070 Specifications

General IconGeneral
BrandLennox
ModelG71MPP-36B-070
CategoryAir Conditioner
LanguageEnglish

Summary

Unit Dimensions

Parts Arrangement

General Safety Information

General Safety Guidelines

Provides essential safety precautions and general installation considerations for the furnace.

Installation and Equipment Setup

Details on selecting installation locations and properly setting up the furnace equipment.

Shipping and Packing List

Gas Furnace Overview

Installation Procedures and Clearances

Upflow Application Clearances

Required clearances for installing the furnace in an upflow configuration.

Downflow Application Clearances

Required clearances for installing the furnace in a downflow configuration.

Horizontal Application Clearances

Required clearances for installing the furnace in horizontal configurations.

Duct System and Piping

Duct System Requirements

Guidelines for sizing and installing supply and return air duct systems.

Pipe and Fittings Specifications

Approved materials and specifications for vent and other piping.

Vent Piping and Termination

Vent Pipe Sizing Worksheet

Worksheet for determining the correct vent pipe size based on length and fittings.

Vent Piping Guidelines

General guidelines for installing vent piping, including slope and support.

Gas Piping Installation

Gas Piping Configurations

Diagrams illustrating possible gas piping configurations for horizontal applications.

Leak Check Procedure

Steps for performing a gas leak check after completing gas piping connections.

Electrical Connections and Wiring

Electrostatic Discharge (ESD) Precautions

Procedures to protect electronic components from static discharge during installation.

Field Wiring Diagram and Connections

Diagram and tables for connecting the furnace to thermostats and accessories.

Integrated Control Configuration

Thermostat Connections

Details on thermostat wiring terminals and their functions on the integrated control.

DIP Switch Settings for Operation Modes

Configuration of DIP switches for heating, cooling, and blower operation modes.

Troubleshooting and Diagnostics

Integrated Control Diagnostic Codes

List of flash codes and their corresponding furnace status or error conditions.

Heating Sequence of Operation

Step-by-step operational sequence for heating calls with different thermostat types.

Cooling Sequence of Operation

Step-by-step operational sequence for cooling calls.

Service and Maintenance

Cleaning Heat Exchanger

Procedure for cleaning the furnace heat exchanger assembly.

Cleaning the Burner Assembly

Steps for cleaning the furnace burner assembly and inspecting burners.

Start-Up and Performance Checklist

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