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Rheem 801S Series User Manual

Rheem 801S Series
52 pages
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ISO 9001:2008
INSTALLATION INSTRUCTIONS
FOR UPFLOW/HORIZONTAL SINGLE STAGE
GAS FURNACES
(-)801S UPFLOW/HORIZONTAL SERIES
(-)801P UPFLOW/HORIZONTAL SERIES
(-)(-)80MSS UPFLOW/HORIZONTAL SERIES
(-)(-)80MSP UPFLOW/HORIZONTAL SERIES
U.L. and/or C.S.A. recognized fuel gas and CO (carbon monoxide) detectors are rec-
ommended in all applications, and their installation should be in accordance with the
manufacturer’s recommendations and/or local laws, rules, regulations, or customs.
92-24161-142-04
SUPERSEDES 92-24161-142-03
Factory Use Only
ST-A1220-01-X0

Table of Contents

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Rheem 801S Series Specifications

General IconGeneral
Input BTU/h40, 000 - 120, 000
TypeGas Furnace
Heating CapacityVaries by model
Fuel TypeNatural Gas
ConfigurationUpflow/Horizontal
IgnitionDirect Spark Ignition
Warranty10-Year Limited
Model Series801S Series

Summary

GENERAL INFORMATION

CALIFORNIA RESIDENTS ONLY

Information for California residents regarding Proposition 65 warnings and chemical disclosures.

SAFETY INFORMATION

IMPORTANT INFORMATION ABOUT EFFICIENCY AND INDOOR AIR QUALITY

Importance of duct system balance and sealing for efficiency, comfort, and indoor air quality.

LOCATION REQUIREMENTS

SITE SELECTION AND CLEARANCES

Guidelines for choosing an optimal location, site selection, and clearance requirements.

DUCTING

UPFLOW INSTALLATIONS

Instructions for connecting ductwork for upflow furnace installations, emphasizing airtightness.

HORIZONTAL UNITS

Guidelines for positioning and connecting ductwork for horizontal furnace installations.

COMBUSTION AND VENTILATION AIR

COMBUSTION AIR REQUIREMENTS

Critical requirements for adequate combustion air supply to prevent hazards like CO poisoning.

VENTING REQUIREMENTS

General information and requirements for venting furnace flue gases to the outdoors.

VENT SYSTEMS (POWER & EXISTING)

Instructions for power vent systems and retrofit guidelines for existing vent systems.

GAS SUPPLY

GAS SUPPLY AND PIPING

Safety information and general requirements for natural gas and propane supply and piping.

GAS PRESSURE SETTINGS

Specifications for gas pressures and procedures for setting supply and manifold pressures.

LP CONVERSION

LP GAS REQUIREMENTS AND CONVERSION

Procedures for converting to LP gas, including pressure and orifice adjustments.

ELECTRICAL WIRING

ELECTRICAL CONNECTIONS AND WIRING

Guidelines for safe electrical connections, junction box relocation, and thermostat wiring.

ACCESSORIES

FIELD INSTALLED OPTIONAL ACCESSORIES

Overview of optional accessories including EAC, Humidifier, Filters, and Adapters.

FILTERS

Importance of maintaining clean furnace filters for optimal operation.

TWINNING

FURNACE TWINNING INSTALLATIONS

Guidelines for installing two furnaces side-by-side for increased capacity.

CONTROL BOARD CONFIGURATION

Specific instructions for twinning furnaces using UT Electronic Controls 1194-200 boards.

HIGH ALTITUDE

NATURAL & LP GAS HIGH ALTITUDE ADJUSTMENTS

Procedures for adjusting furnace input and orifice size for high altitude installations.

START-UP PROCEDURES

SEQUENCE OF OPERATIONS AND START-UP

Detailed sequence for furnace ignition, start-up, and shutdown procedures.

FAULT CODES AND DIAGNOSTICS

DIAGNOSTICS AND FAULT CODES

Explanation of display codes for diagnosing furnace faults and dual faults.

LOCKOUT CONDITIONS

FIVE-MINUTE, ONE-HOUR, AND HARD LOCKOUTS

Explanation of different lockout types, their triggers, and reset procedures.

FIELD SELECTIONS & ADJUSTMENTS

DIPSWITCH SETTINGS AND FAULT CLEAR

How to use dipswitches for configuration and methods for clearing fault codes.

FLAME STATUS AND TIMING DIAGRAMS

Interpreting flame status LED and understanding operational timing diagrams.

FURNACE INPUT AND TIMING

Procedures for checking furnace input, setting rate, and understanding operational timing diagrams.

AIRFLOW AND BLOWER CONTROL

TEMPERATURE RISE CHECK AND BLOWER SPEED

Methods for checking airflow via temperature rise and selecting blower speeds.

SAFETY FEATURES

LIMIT CONTROLS AND SAFETY SWITCHES

Explanation of limit controls, flame roll-out, and pressure switches for furnace safety.

MAINTENANCE AND INSPECTION

FILTERS AND LUBRICATION

Guidance on filter maintenance, lubrication, and general system operation.

INSPECTION AND REPLACEMENT PARTS

Recommendations for annual inspections and information on obtaining replacement parts.

SYSTEM OPERATION ADVICE

Customer advice on operating the furnace efficiently and maintaining the system.

Diagnostics

IFC TROUBLESHOOTING GUIDE

A flowchart to diagnose problems related to the furnace control board.

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