6
2. Turn off all electrical power to
the furnace. (See Fig. 9.)
9
3. Close oil supply valve.
(See Fig. 10).
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 furnace is being shut down be-
cause 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
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 furnace air filters be checked
every 3 or 4 weeks and cleaned or
replaced as necessary.
The air filter is installed in an ex-
ternal filter rack which is provided as
standard equipment with furnace.
To inspect, clean, and/or replace
air filter, follow these steps:
1. Turn off electrical supply to fur-
nace. (See Fig. 11.)
2. Remove filter from external fil-
ter rack.
3. Inspect filter. If torn, replace it.
NOTE:
If filter has been replaced
with an electronic air cleaner
(EAC), refer to the EAC Owner’s
Manual for maintenance informa-
tion.
5. If filter is dirty, it must be re-
placed. If your furnace air filter
needs to be replaced, be sure to
use the same size and type of fil-
ter that was originally supplied.
Use furnace filter table for filter
size and filter rack flange dimen-
sions for return air duct.
FURNACE AIR FILTER TABLE
If you have replaced a disposable
filter with a permanent washable
filter, it may be cleaned if it is dirty.
Wash filter in a sink, bathtub, or
outside with a garden hose. Always
use cold tap water. A mild liquid
detergent may be used if necessary.
Spray water through filter in the
opposite direction of airflow.
Allow filter to dry.
6. Re-install clean air filter.
7. Turn on electrical supply to
furnace.
A CHECK-UP
CHECKLIST
Your furnace represents an impor-
tant investment in your family’s
comfort and your home’s value. To
keep it performing properly and as
a preventative to future problems,
have a trained service specialist
give your furnace a professional
check-up annually. The following
checklist can be used as a guideline
to proper service:
WARNING
Turn off all electrical power to
furnace before performing
any maintenance or service
on unit. Failure to take this
precaution may result in per-
sonal injury due to electrical
shock.
CAUTION
Although special care has
been taken to minimize sharp
edges, be extremely careful
when handling parts or
reaching into the furnace.
CAUTION
Never operate your furnace
without the air filters in place.
Doing so may damage the
furnace blower motor. An ac-
cumulation of dust and lint
on internal parts of your fur-
nace can cause a loss of effi-
ciency.
!
!
!
FLANGE
OPENING
SIZE
(IN.)
FILTER
SIZE
(IN.)
FILTER
TYPE
15 X 23
16 X 24 or 25 X 1 Disposable
19 X 29
20 X 30 X 1
Disposable
