Service and Maintenance Instructions
355BAV
DEDICATED UPF LOW
VARIABLE--CAPACITY
CONDENSING GAS F URNACES
NOTE: Read the entire instruction manual before starting the
installation.
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS 1........................
GENERAL 2........................................
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS 2..
CARE AND MAINTENANCE 3........................
Cleaning and/or Replacing Air Filter 3.................
Blower Motor and Wheel Maintenance 4...............
Cleaning Burners 5................................
Cleaning Heat Exchangers 6.........................
Flushing Collector Box and Drainage System 7..........
Servicing Hot Surface Igniter 8.......................
Electrical Controls and Wiring 9......................
Checking Heat Tape Operation (If Applicable) 10........
Winterizing 10....................................
WIRING DIAGRAMS 11..............................
TROUBLESHOOTING 16.............................
ELECTRICAL SHOCK, FIRE, OR OPERATION
HAZARD
Failure to follow safety warnings exactly could result in
dangerous operation, serious injury, death, or property
damage.
Improper servicing could result in dangerous operation,
serious injury, death, or property damage.
-- Before servicing, disconnect all electrical power to
furnace.
-- When servicing controls, label all wires prior to
disconnecting. Reconnect wires correctly.
-- Verify proper operation after servicing.
!
WARNING
ELECTRICAL SHOCK, FIRE, OR EXPLOSION
HAZARD
Failure to follow this warning could result in possible
damage to this equipment, serious personal injury, or
death.
The ability to properly perform maintenance on this
equipment requires certain expertise, mechanical skills,
tools, and equipment. If you do not possess these, do
not attempt to perform any maintenance on this
equipment other than those procedures recommended in
the User’s Manual.
!
WARNING
FIRE OR EXPLOSION HAZARD
Failure to follow this warning could cause corrosion of
heat exchanger, fire, personal injury, or death.
Never store anything on, near, or in contact with the
furnace, such as:
1. Spray or aerosol cans, rags, brooms, dust mops,
vacuum cleaners, or other cleaning tools.
2. Soap powders, bleaches, waxes or other cleaning
compounds, plastic or plastic containers, gasoline,
kerosene, cigarette lighter fluid, dry cleaning fluids, or
other volatile fluids.
3. Paint thinners and other painting compounds, paper
bags, or other paper products.
!
WARNING
SAFETY CONSIDERATIONS
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 the signal words DANGER, WARNING, and
CAUTION. These words are used with the safety--alert symbol.
DANGER identifies the most seriou s hazards which will result in
severe personal injury or death. WARNING signifies a hazard
which could result in personal injury or death. CAUTION is used
to identify unsafe practices which may 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.
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