6
10
4. If applicable, turn off water sup-
ply to humidifier.
5. If furnace blower will be neces-
sary for cooling system, remem-
ber to turn electric power back
on when needed for air condi-
tioning.
6. If the furnace is being shut down
because of a malfunction, call
your dealer as soon as possible.
ALWAYS KEEP MAIN OIL
VALVE TURNED OFF IF
BURNER IS SHUT DOWN FOR
AN EXTENDED PERIOD OF
TIME.
PERFORMING
ROUTINE
MAINTENANCE
With proper maintenance and care,
your furnace will operate economi-
cally and dependably. Instructions
for basic maintenance follow. How-
ever, before beginning maintenance,
follow these safety precautions:
11
12
FILTERING OUT
TROUBLE
Dirty air filters will cause a loss of
airflow in your duct system. When
excessive loss of airflow occurs,
the furnace may cycle on its safety
controls. If this condition is left
unattended, the furnace will even-
tually lock out. It is recommended
that the furnace air filters be
checked every 3 or 4 weeks and
cleaned or replaced as necessary.
The air filters are located in the
blower compartment installed in
an internal filter rack which is pro-
vided as standard equipment with
furnace. (See Fig. 2.) To inspect,
clean, and or replace air filters, fol-
low these steps:
1. Turn off electrical supply to fur-
nace. (See Fig. 11.)
2. Remove blower access door in
rear of furnace. (See Fig. 13.)
Lift door up, then out using han-
dle on blower access door.
13
3. Remove air filters from furnace.
a. Remove filter resting in filter
rack at an angle in front of
blower first. Slide filter back
to clear filter rack ends then
lift up and out of filter rack
and blower compartment.
(See Fig. 14.)
14
b. Remove second filter lying
above blower. Slide filter
toward rear of furnace and
out of blower compartment.
(See Fig. 15.)
WARNING
ELECTRICAL SHOCK
HAZARD
Failure to follow this warning
could result in personal in-
jury or death.
Turn off all electrical power to
furnace before performing
any maintenance or service
on unit.
!
CAUTION
CUTS HAZARD
Failure to follow this caution
may result in minor personal
injury.
Although special care has
been taken to minimize sharp
edges, be extremely careful
when handling parts or
reaching into the furnace.
!
CAUTION
UNIT OVERHEAT HAZARD
Failure to follow this caution
may result in damage to the
furnace blower motor, over
heat the heat exchanger and
reduce the efficiency.
Never operate your furnace
without the air filters in place.
!
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1
1
2
