Grandaire WFAR080B048 - User Manual

Printed in U.S.A. 44001710402 12/9/2014
INSTALLATION INSTRUCTIONS
Single--Stage, PSC Blower Motor
35” Tall, High Efficiency Condensing Gas Furnace
WFAR080B048 (B Series Only)
WFAR (All C Series)
These instructions must be read and understood completely before attempting installation.
Safety Labeling and Signal Words
DANGER, WARNING, CAUTION, and NOTE
The signal words DANGER, WARNING,
CAUTION, and NOTE are used to identify levels of
hazard seriousness. The signal word DANGER is
only used on product labels to signify an immediate
hazard. The signal words WARNING, CAUTION,
and NOTE will be used on product labels and
throughout this manual and other manual that may
apply to the product.
DANGER -- Immediate hazards which will result in
severe personal injury or death.
WARNING -- Hazards or unsafe practices which
could result in severe personal injury or death.
CAUTION -- Hazards or unsafe practices which
may result in minor personal injury or product or
property damage.
NOTE -- Used to highlight suggestions which will
result in enhanced installation, reliability, or
operation.
!
WARNING
Signal Words in Manuals
The signal word CAUTION is used throughout
this manual in the following manner:
!
CAUTION
Signal Words on Product Labeling
Signal words are used in combination with
colors and/or pictures or product labels.
The signal word WARNING is used throughout
this manual in the following manner:
Safety--alert symbol
When you see this symbol on the unit and in
instructions or manuals, be alert to the
potential for personal injury.
TABLE OF CONTENTS
SAFETY CONSIDERATIONS 3..............................
INTRODUCTION 4.........................................
CODES AND STANDARDS 4................................
ELECTROSTATIC DISCHARGE
PRECAUTIONS PROCEDURE 5............................
MINIMUM CLEARANCES TO COMBUSTIBLE MATERIALS 5...
DIMENSIONAL DRAWING 7................................
LOCATION 8..............................................
GENERAL 8...............................................
AIR FOR COMBUSTION AND VENTILATION 9................
MINIMUM FREE AREA REQUIRED 11........................
MINIMUM SPACE VOLUMES 11..............................
CONDENSATE TRAP 12.....................................
INSTALLATION 20..........................................
FILTER AND RETURN DUCT SIZING 22.......................
AIR DUCTS 28.............................................
GAS PIPING 29.............................................
ELECTRICAL CONNECTIONS 30.............................
J--BOX INSTALLATION 31...................................
VENTING 35...............................................
SPECIAL VENTING REQUIREMENTS
FOR INSTALLATIONS IN CANADA 35........................
VENTING SYSTEMS 36.....................................
INSTALLING THE VENT TERMINATION 42....................
VENTING SYSTEM LENGTH CALCULATIONS 46..............
Use of the AHRI Certified TM Mark indicates a
manufacturer’s participation in the program.
For verification of certification for individual
products, go to www.ahridirectory.org .
INSTALLER: Affix these instructions on or adjacent to the
furnace.
CONSUMER: Retain these instructions for future
reference.
Portions of the text and tables are reprinted from NFPA 54 /ANSI Z223.1--2012, with permission of National Fire Protection Association, Quincy, MA 02269 and American Gas Association, Washington, DC
20001. This reprinted material is not the complete and official position of the NFPA or ANSI, on the referenced subject, which is represented only by the standard in its entirety.

Summary

Safety Considerations

Electrical Shock and Explosion Hazards

Warns about electrical shock, explosion, and fire risks during installation.

Fire Hazard Warnings

Highlights fire risks associated with combustible materials and solvents.

Furnace Reliability and Component Damage

Codes and Standards

Safety Codes and Standards

Lists applicable safety codes for US and Canada installations.

General Installation Standards

Location Requirements

Personal Injury and Property Damage Hazard

Warns of hazards from improper furnace location or installation.

Air for Combustion and Ventilation

Introduction to Air Supply

Explains the importance of adequate air for combustion.

Direct Vent (2-pipe) Applications

Non-Direct Vent (1-pipe) Applications

Air for Combustion and Ventilation (Continued)

Ventilated Combustion Air Applications

Condensate Trap Installation

Condensate Trap Orientation (Upflow, Downflow, Horizontal)

Details condensate trap positioning for different furnace orientations.

Condensate Drain Connection

Freeze Protection for Drain Lines

Advises on protecting drain lines and traps from freezing.

Property Damage Hazard from Drains

Furnace Installation Procedures

Upflow Installation Details

Covers supply and return air connections for upflow setup.

Downflow Installation Details

Covers supply air connections for downflow setup.

Return Air Connections & Furnace Mounting

Fire Hazard Warning for Return Air

Warns against connecting return air ducts to the furnace back.

Bottom Return Air Inlet

Furnace Mounting and Support

Covers platform, suspended, and roll-out protection support.

Filter Arrangement and Sizing

Filter Installation Guidelines

Explains filter placement for different furnace orientations.

Fire, CO, and Poisoning Hazard (Filter)

Filter and Duct Sizing

Details factors for sizing filters and associated ductwork.

Air Ducts

General Ductwork Requirements

Outlines general principles for designing and installing duct systems.

Return Duct Sizing Considerations

Gas Piping Installation

Fire and Explosion Hazards (Gas Piping)

Warns of fire and explosion risks during gas piping installation.

Gas Piping Codes and Standards

Cites national and local codes for gas piping installation.

Massachusetts Gas Piping Notice

Electrical Connections

Electrical Shock, Fire, Explosion Hazards

Warns of electrical hazards during servicing and installation.

Blower Door Switch Operation

Electrical Wiring and Grounding

Electrical Shock and Fire Hazard (Grounding)

Emphasizes proper grounding for electrical safety.

Furnace Operation Hazard (Control Grounding)

Highlights the need for control grounding for proper operation.

115-V Wiring Requirements

J-Box Installation and Wiring

Provides instructions for installing the J-Box and making connections.

J-Box and 24-V Wiring

BX Cable Installation in Furnace J-Box

24-V Wiring and Thermostat Connections

Explains 24-V wiring, thermostat connections, and accessory wiring.

Venting System Installation

Venting System Planning and Assembly

Polypropylene Venting Systems Information

Special Venting Requirements for Canada

Details Canadian code requirements for venting systems.

Venting System Operation and Safety

Carbon Monoxide Hazard (Venting)

Warns about CO poisoning risks related to improper venting.

General Venting Requirements

Venting Materials

Venting System Requirements (US;Canada)

Vent Termination Location and Support

Recommended Vent Termination Support

Direct Vent; 2-Pipe System Termination

Vent Termination Clearances and Configurations

Roof Termination Guidelines

Sidewall Termination Guidelines

Carbon Monoxide Hazard (Venting)

Venting System Length Calculations

Total Equivalent Vent Length (TEVL) Calculation

Step-by-step guide to calculating total equivalent vent length.

Example 1: Direct Vent 60,000 BTUH Furnace

Step-by-step calculation for a direct vent furnace example.

Polypropylene Venting System Calculations

Example 2: Polypropylene Venting System

Calculation example for a polypropylene venting system.

Furnace Configuration and Vent Pipe Installation

Near Furnace Vent Connections

Vent and Combustion Air Pipe Adapter Installation

Details installing vent pipe and combustion air pipe adapters.

Polypropylene Venting System Caution

Vent Termination Installation

Recommended Support for Vent Terminations

Concentric Vent Termination

Vent Termination Installation (Continued)

Two-Pipe and Single-Pipe Vent Termination

Optional Installation of the Vent Pipe

Recommended Vent Termination Support

Inducer Outlet Restrictor

Concentric Vent Sidewall Termination

Grandaire WFAR080B048 Specifications

General

Brand	Grandaire
Model	WFAR080B048
Efficiency	80% AFUE
Stages	Single Stage
Input BTU	80, 000 BTU
Output BTU	64, 000 BTU
Fuel Type	Natural Gas
Warranty	10-Year Limited Warranty