Regular Dealer Maintenance - Bryant 376CAV Information Manual

WARNING
!
If holes are found—or if the
vent pipe is obstructed or is
not connected—toxic fumes
can escape into your home. DO
NOT OPERATE YOUR FUR-
NACE. Call your dealer for ser-
vice. A failure to follow this
warning could result in per-
sonal injury or death.
4. Replace the access doors and re-
store electrical power to the fur-
nace. Be sure bottom door flange is
inside of the furnace casing. (See
Fig. 14, 15, and 23.)
5. Start the furnace and observe its
operation. If possible, watch the
burner flames. Are they burning
bright blue? If not (or if you suspect
some other malfunction), call your
servicing dealer.
BEFORE YOU REQUEST
A "SERVICE CALL"
BEFORE YOU CALL FOR
SERVICE, CHECK FOR
SEVERAL EASILY SOLVED
PROBLEMS:
• Check for sufficient airflow. Check
the air filter for dirt. Check for blocked
return-air or supply-air grilles. Be sure
they are open and unobstructed. If this
isn't the cause, call your servicing
dealer.
If your furnace isn't operating at all,
check the following list for easily
solved problems:
• Is your thermostat set above room
temperature? Is the switch in the HEAT
position?
• Is the electrical power supply switch
ON? Is the blower access door firmly
in place? Are any fuses blown? (There
is a fuse on the furnace control board.)
Has a circuit breaker tripped?
• Is the manual shut-off valve in the
gas supply pipe leading to the furnace
open? Does the lever point in the same
direction that the pipe runs (open)? Or
is it at right angles (closed)?
NOTE: Before proceeding with the
next checks, turn OFF the electrical
power supply to the furnace. Remove
26 the access doors.
• Is the control knob on the gas valve
turned to the ON position? If this or the
preceding check shows an interruption
in the gas supply, make sure the gas has
not been shut off for safety reasons. If
nothing else seems to be wrong, follow
the startup procedures found on pages
4 and 5 of this booklet.
• If for some reason the vent is
blocked, the draft safeguard switch will
shut off the furnace. Reset the switch
by pushing the button located on top of
the switch (see page 3 for switch loca-
tion).
If the switch trips a second time, turn
off the furnace and call for service.
• DOWNFLOW/HORIZONTAL
ONLY—Check the manual-reset aux-
iliary limit switch located on the
blower housing. If the blower motor
fails, this switch will shut off the fur-
nace. Reset it by pushing the button on
the switch. If it trips again, turn off the
furnace and call for service.
• Check the manual-reset limit
switch(es) located near the burners. If
the furnace has experienced a high-
temperature condition, due to inade-
quate combustion air, these switches
will shut off the furnace. Reset the
switch(es) by pushing the button on the
switch. If the switch trips a second
time, turn off the furnace and call for
service.
• If your furnace still fails to operate,
call your servicing dealer for trouble-
shooting and repairs. Tell your dealer
the model and serial numbers for your
furnace. (You should have them re-
corded on page 9 of this booklet.) By
knowing exactly which furnace you
have, the dealer may be able to offer
suggestions over the phone, or save
valuable time through knowledgeable
preparation for the service call.
8
REGULAR DEALER
MAINTENANCE
In addition to the type of routine main-
tenance you might be willing to do,
your furnace should be inspected regu-
larly by a properly trained service tech-
nician. An annual inspection (or
semiannual inspection, at least)
should include the following:
1. Inspection of all flue product pas-
sages—including the burners, heat
exchanger, relief box, and vent
pipe.
2. Inspection of all combustion
and ventilation air passages and
openings.
3. Close check of all gas pipes
leading to (and inside of) your
furnace.
4. Inspection, cleaning, and lubrica-
tion (when required) of the blower
motor and wheel.
NOTE: Refer to the unit Service Proce-
dures for blower motor oiling infor-
mation. When required, the motor
must be oiled by a qualified service
technician.
5. Routine inspection and cleaning/
replacement of the air filter.
6. Inspection of all supply- and
return-air ducts for obstructions,
air leaks, and insulation. Any prob-
lems found should be resolved at
this time.
7. Inspection of furnace installation
for proper support and any obvious
deterioration of the furnace. The
support must be sound and without
sags, gaps, cracks, etc., around the
furnace base so as to provide an air
seal between the support and
furnace.
8. A check for loose connections at-
taching individual components. In-
spection of all electrical wiring and
their connections.
9. Operational check of the furnace
itself to determine working condi-
tion. Repair or adjustment should
be made at this time.
Ask your servicing dealer for
further details about an economical
service contract that covers seasonal
inspections.