Bard Bayrd Furnace 403293A - Manual (Page 36)

SECTION ao — MAINTAINING FURNACE IN
GOOD WORKING ORDER.
WARNINOx Follow these procedures before Inspect­
ing furnace.
• Turn room thermostat to its lowest or off set­
ting.
* Turn off manual gas shut-off valve.
* Wait at least five minutes for furnace to cool If It
was recently operating.
• Turn off furnace electrical power; failure to do
so could result In injury or death.
WARNING! Use replacement parts listed In parts list.
Failure to do so could cause Improper furnace opera­
tion, resulting In damage, Injury or death.
Perform periodic preventive maintenance once before heat-
ing season begins and once during heating season. Inspect,
clean, and repair as needed following items:
1. All combustion and ventilation air openings into fur­
nace space.
2. All burner combustion air openings.
3. All burners, pilot, collector box, draft inducer as­
sembly and complete vent system.
4. All gas pipes leading to furnace.
5. All electrical wiring and connections, including elec­
trical ground.
6. All supply air and return air ducts for obstructions,
air leaks and loose Insulation.
7. Blower housing, motor and wheel, air filters, air
conditioning and draft inducer motor. Blower motor
and inducer motor do not require oiling.
A qualified service technician should follow these
steps to remove blower assembly.
a. On downflow furnaces, remove vent pipe inside
furnace.
b. Disconnect wires from low voltage terminal strip
on control box.
c. Remove two screws holding control box to the
side brackets.
d. Remove blower door.
e. Locate connector block beside blower door on
control box side. Remove it by squeezing lock­
ing ears of connector block. See Figure 41.
f. Disconnect wires to limit switches on blower
housing.
g. On dual blower wheel models, disconnect wires
to door switch.
h. Remove screws holding blower assembly to
blower deck.
(. 1. Blower assembly will now slide out. DO
NOT damage limit switches on bottom of
blower housing.
2. After cleaning blower assembly, reassemble
in reverse order making sure speed selec­
tions are in original positions.
8. Assure the furnace is operating properly and safely.
SECTION 30 — GETTING OTHER INFORMA­
TION AND PUBLICATIONS.
These pubiications can help you install the furnace. You
can usually find these at your local library or buy them directly
from the publisher. Be sure to consult current edition of
each standard.
National Fuel Gas Code
National Electrical
Standard for the
installation of Warm Air
Heating and Air
Conditioning Systems
ANSI Z223.1/NFPA 54
ANSI/NFPA Code 70
ASHRAE/NFPA 90
NFPA211 Standard for Chimneys,
Fireplaces, Vents, and
Solid Fuel Burning
Appliances
For more information, contact these publishers:
ANSI: AMERICAN NATIONAL STANDARDS
INSTITUTE
1430 Broadway
New York, NY 10018
(212) 354-3300
ASHRAE: AMERICAN SOCIETY OF HEATING
REFRIGERATING AND AIR
CONDITIONING ENGINEERS, INC.
1791 Tullie Circle
N.E. Atlanta. GA 30329
(404) 636-8400
NFPA: NATIONAL FIRE PROTECTION
ASSOCIATION
Batterymarch Park
Quincey, MA 02269
(617) 770-3000
34