Rheem 80LS05EAR User Manual

92-24161-38-03
SUPERSEDES 92-24161-38-02
INSTALLATION INSTRUCTIONS
FOR UPFLOW/HORIZONTAL & DOWNFLOW INDUCED
DRAFT GAS FURNACES
(-)GPN/(-)GPP UPFLOW/HORIZONTAL SERIES
(-)GLN DOWNFLOW SERIES

Rheem 80LS05EAR Specifications

General

AFUE	80%
Model Number	80LS05EAR
Brand	Rheem
Blower Type	Multi-Speed
Gas Type	Natural Gas
Weight	120 lbs
Input BTU/h	50000
Output BTU/h	40, 000
Input BTU	50, 000 BTU/h

Summary

SAFETY INFORMATION

General Safety Warnings

Essential safety precautions for proper installation and operation.

Specific Installation Precautions

Warnings regarding garages, outdoor areas, and air circulation safety.

Gas Leak Detection and Response

Instructions on what to do if you smell gas and how to test for leaks.

GENERAL INFORMATION

Furnace Specifications and Codes

Details on furnace series, AFUE, and compliance with industry codes.

Location Requirements and Considerations

Guidelines for selecting an appropriate installation site.

CLEARANCE - ACCESSIBILITY

Clearances to Combustible Materials

Specifies required clearances to combustible materials for safe installation.

Site Selection Criteria

Guidelines for choosing the furnace location based on duct system and utilities.

Ducting Considerations

Proper airflow management for efficient furnace operation and system longevity.

COMBUSTION AND VENTILATION AIR

Combustion Air Requirements

Requirements for providing adequate air for combustion and ventilation.

Corrosive Atmosphere Warning

Caution against using air from corrosive atmospheres for combustion.

VENTING GENERAL INFORMATION

Furnace Category Information

Details on the furnace's category type and venting characteristics.

Important Application Notes

Key considerations for retrofitting and common venting applications.

GAS SUPPLY AND PIPING

Gas Supply Requirements

Information on natural gas only, conversion kits, and U.L. detectors.

Gas Piping Installation

Proper connection and installation of the gas supply line and valve according to codes.

GAS PRESSURE

Gas Pressure Specifications

Details on maximum/minimum pressures and altitude adjustments.

LP Conversion and NOx Models

Procedures for LP conversion and handling NOx inserts.

ELECTRICAL WIRING

Electrical Connections and Grounding

Instructions for safe electrical hookup, grounding, and circuit requirements.

Thermostat Installation and Settings

Guidelines for thermostat compatibility, wiring, and heat anticipator adjustment.

80+ HIGH ALTITUDE INSTRUCTIONS

Altitude Derating and Orifice Sizing

Procedures for adjusting input rate and orifice size for high altitudes.

Alternate Canadian Derate Method

Alternative method for altitude deration using manifold pressure.

START-UP PROCEDURE

Lighting Instructions

Step-by-step guide for safely starting the furnace for the first time.

Sequence of Operation

Describes the order of operations for ignition and heating cycle.

AIR FLOW

Importance of Air Flow

Explains the critical role of proper airflow for heat exchanger and system performance.

Temperature Rise Check

Procedure to verify correct airflow by measuring temperature difference.

SAFETY FEATURES

Limit Control Function

Explains the high limit cut-off and reasons for its activation.

Flame Roll-Out Safety Switches

Describes the function of switches protecting against flame roll-out conditions.

Pressure Switch Function

Explains the pressure switch monitoring vent system conditions.

MAINTENANCE

Filter Maintenance and Sizing

Instructions for cleaning, replacing, and sizing air filters.

SYSTEM OPERATION INFORMATION

Customer Advice for Efficient Operation

Tips for customers on filter cleaning, airflow, and thermostat settings.

Annual Inspection Recommendations

Guidance on periodic inspection of burners, vent system, and markings.

TROUBLESHOOTING FLOWCHART

Integrated Furnace Control (IFC) Troubleshooting

A guide to diagnose and resolve common IFC-related operational faults.