NOTE: Read the entire instruction manual before starting the
installation.
TABLE OF CONTENTS
SAFETY CONSIDERATIONS.....................................................1
INTRODUCTION..........................................................................2
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS
PROCEDURE ................................................................................2
CARE AND MAINTENANCE.....................................................2
Cleaning and/or Replacing Air Filter.......................................2
Blower Motor and Wheel.........................................................3
Cleaning Heat Exchanger.........................................................4
Electrical Controls and Wiring.................................................5
Wiring Diagrams............................................................................6
Troubleshooting..............................................................................6
SAFETY CONSIDERATIONS
Installing and servicing heating equipment can be hazardous due to
gas and electrical components. Only trained and qualified person-
nel 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, tags, and
labels attached to or shipped with the unit and other safety
precautions that may apply.
In the United States, follow all safety codes including the National
Fuel Gas Code (NFGC) NFPA No. 54-1996/ANSI Z223.1-1999.
In Canada, refer to the current edition of the National Standard of
Canada CAN/CGA-B149.1- and .2-M99 Natural Gas and Propane
Gas Installation Codes (NSCNGPIC). Wear safety glasses and
work gloves. Have fire extinguisher available during start-up and
adjustment procedures and service calls.
Recognize safety information. This is the safety-alert symbol
.
When you see this symbol on the furnace and in instructions or
manuals, be alert to the potential for personal injury.
Understand these signal words; DANGER, WARNING, and
CAUTION. These words are used with the safety-alert symbol.
DANGER identifies the most serious hazards which will result in
severe personal injury or death. WARNING signifies hazards
which could result in personal injury or death. CAUTION is used
to identify unsafe practices which would result in minor personal
injury or product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation, reliability,
or operation.
Fig. 1—Model 333BAV or 333JAV Horizontal
A95137
Fig. 2—Model 333BAV or 333JAV Upflow
A94085
REGISTERED QUALITY SYSTEM
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EFFICIENCY
RATING
CERTIFIED
CERTIFIED
Service and
Maintenance Procedures
UPFLOW/HORIZONTAL
VARIABLE-SPEED, 2–STAGE
INDUCED-COMBUSTION FURNACE
Cancels: SP04-57 SP04-64
10-00
333BAV
333JAV
Series C&D
—1—
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