Bryant 355MAV Service And Maintenance Procedures Manual

NOTE: Read the entire instruction manual before performing any
service or maintenance.
This symbol → indicates a change since the last issue.
Index
SAFETY CONSIDERATIONS..................................................1-2
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS........2
GENERAL......................................................................................2
CARE AND MAINTENANCE................................................2-11
Cleaning and/or Replacing Air Filter ...................................2-3
Blower Motor and Wheel Maintenance................................3-4
Cleaning Burners ......................................................................4
Cleaning Heat Exchangers ....................................................4-5
Primary Heat Exchangers ................................................4-5
Secondary Heat Exchangers................................................5
Flushing Collector Box and Drainage System .....................5-7
Servicing Hot Surface Ignitor ..................................................7
Electrical Controls and Wiring .............................................7-8
Troubleshooting .....................................................................8-9
Checking Heat Tape Operation (If Applicable) .................9-10
Winterizing ........................................................................10-11
SERVICE LABEL ..................................................................12-13
WIRING DIAGRAM...................................................................14

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, on tags,
and on labels attached to or shipped with the unit and other safety
precautions that may apply.
Follow all safety codes, including NFPA 54/ANSI Z223.1-1992,
National Fuel Gas Code. In Canada, refer to the current edition of
the National Standard of Canada CAN/CGA-B-149. Wear safety
glasses and work gloves. Have a 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 unit and in instructions or
manuals, be alert to the potential for personal injury.
service and
maintenance procedures
4-WAY MULTIPOISE
VARIABLE-CAPACITY
CONDENSING GAS FURNACE
A93040
Page
.
-1-
Cancels: SP05-16
®
ama
A PP R O VED
R
As an ENERGY STAR Partner, BDP Company has deter-
mined that this product meets the ENERGY STAR guide-
lines for energy efficiency.
Fig. 1-Multipoise Furnace in Upflow Orientation
Understand the signal words DANGER, WARNING, and CAU-
TION. These words are used with the safety-alert symbol. DAN-
GER 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.
WARNING: The ability to properly perform mainte-
nance on this equipment requires certain expertise, me-
chanical skills, tools, and equipment. If you do not
possess these, do not attempt to perform any maintenance
on this equipment other than those procedures recom-
mended in the User's Manual. FAILURE TO FOLLOW
THIS WARNING COULD RESULT IN POSSIBLE
DAMAGE TO THIS EQUIPMENT, SERIOUS PER-
SONAL INJURY, OR DEATH.
355MAV
Series C
SP05-23
6-95
A92497