NOTE:
Read the entire instruction manual before performing any service or maintenance.
Index
Page
SAFETY CONSIDERATIONS .................................................................................................................................................................................1-2
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS
PROCEDURE...........................................................................................................................................................................................................2
CARE AND MAINTENANCE .................................................................................................................................................................................2-8
Air Filter Arrangement .........................................................................................................................................................................................2-3
Blower Motor and Wheel .....................................................................................................................................................................................3-5
Cleaning Heat Exchanger .....................................................................................................................................................................................5-7
Electrical Controls and Wiring .............................................................................................................................................................................7-8
Troubleshooting...................................................................................................................................................................................................8-13
Unit Wiring Diagram .............................................................................................................................................................................................10
Service Label ..........................................................................................................................................................................................................11
Troubleshooting Guide......................................................................................................................................................................................12-13
SAFETY CONSIDERATIONS
Installing and servicing heating equipment can be hazardous due to gas and electrical components. Only trained and qualified personnel should
install, repair, or service heating equipment.
Untrained personnel can perform basic maintenance functions such as cleaning and replacing air filters. All other operations must be performed
by trained service personnel. When working on heating equipment, observe precautions in the literature, on tags, and on labels attached to or
shipped with the unit and other safety precautions that may apply.
Follow all safety codes. In the United States, follow all safety codes including the National Fuel Gas Code (NFGC) NFPA No. 54-1992/ANSI
Z223.1-1992. In Canada, refer to the current edition of the National Standard of Canada CAN/CGA-B149.1- and .2-M95 Natural Gas and Propane
Installation Codes (NSCNGPIC). Wear safety glasses and work gloves. Have fire extinguisher available during start-up and adjustment procedures
and service calls.
Fig. 3—Model GB1AAV
Upflow
A94085
Fig. 2—Model GB3AAV
Downflow
A94086
Fig. 1—Model GB3AAV Horizontal
A94087
®
ama
CANADIAN GAS ASSOCIATION
A PP R O VED
R
CERTIFICATION OF
MANUFACTURING SITE
Service and Maintenance Instructions
GB1AAV
GB3AAV
HSI Mid-Efficiency
Induced-Combustion Furnaces
Sizes 045 thru 155
Series G
Form:
SG-GB1A-09
Cancels:
SG-GB1A-08
Printed in U.S.A.
5-96
Catalog No.
92-33GB-1A23
