SCHEDULED MAINTENANCE
38
WARNING
HIGH
VOLTAG
E
D
IS
C
ONN
EC
T
ALL
POW
ER
B
E
FO
RE
S
ER
VI
C
ING
O
R
INSTALLING
THIS
UNIT
.
M
ULTIPL
E
POW
ER
SOU
RCE
S
MAY
B
E
P
RE
S
E
NT
.
F
AILU
RE
TO
DO
SO
MAY
C
AUS
E
P
R
OP
ER
TY
DAMAG
E
,
P
ER
SONAL
IN
J
U
R
Y
O
R
D
E
ATH
.
I
F
YOU
MUST
HANDL
E
TH
E
ITNITO
R
,
HANDL
E
WITH
C
A
RE.
T
OU
C
HING
TH
E
IGNITO
R
BODY
WITH
BA
RE
FING
ER
S,
R
OUGH
HANDLING,
O
R
VIB
R
ATION
C
OULD
RE
SULT
IN
E
A
R
LY
IGNITO
R
FAILU
RE.
O
NLY
A
Q
UALIFI
E
D
S
ER
VI
CER
SHOULD
E
V
ER
HANDL
E
TH
E
IGNITO
R.
CAUTION
ANNUAL INSPECTION
The furnace should be inspected by a qualified installer, or
service agency at least once per year. This check should be
performed at the beginning of the heating season. This will
ensure that all furnace components are in proper working
order and that the heating system functions appropriately. Pay
particular attention to the following items. Repair or service
as necessary.
•
Flue pipe system. Check for blockage and/or leakage.
Check the outside termination and the connections at
the furnace.
•
Combustion air intake pipe system (where applicable).
Check for blockage and/or leakage. Check the outside
termination and the connection at the furnace.
•
Heat exchanger. Check for corrosion and/or buildup
within the heat exchanger passageways.
•
Burners. Check for proper ignition, burner flame, and
flame sense.
•
Drainage system. Check for blockage and/or leakage.
Check hose connections at and internal to furnace.
•
Wiring. Check electrical connections for tightness and/
or corrosion. Check wires for damage.
•
Filters.
AIR FILTER
N
E
V
ER
OP
ER
AT
E
FU
R
NA
CE
WIHTOUT
A
FILT
ER
INSTALL
E
D
AS
DUST
AND
LINT
WILL
BUILD
UP
ON
INT
ER
NAL
PA
R
TS
RE
SULTING
IN
LOSS
OF
E
FFI
C
I
E
N
C
Y,
EQ
UIPM
E
NT
DAMAMG
E
,
AND
POSSIBL
E
FI
RE.
WARNING
Filters must be used with this furnace. Filters do not ship
with these furnaces but must be provided by the installer for
proper furnace operation.
Remember that dirty filters are the most common cause of
inadequate heating or cooling performance.
Maintenance
Improper filter maintenance is the most common cause of
inadequate heating or cooling performance. Filters should
be cleaned (permanent) or replaced (disposable) every two
months or as required. It is the owner’s responsibility to keep
air filters clean. When replacing a filter, it must be replaced
with a filter of the same type and size.
Filter Removal
Depending on the installation, differing filter arrangements
can be applied. Filters can be installed in the central return
register, the bottom of the blower compartment (upflow only), a
side panel external filter rack kit (upflow only), or the ductwork
above a counterflow furnace. A media air filter or electronic air
cleaner can be used as an alternate filter. The filter sizes given
in the
Product Design
section of this manual or the product
Specification Sheet
must be followed to ensure proper unit
performance. Refer to the following information for removal
and installation of filters.
FILTER REMOVAL PROCEDURE
Media Air Filter or Electronic Air Cleaner Removal
Follow the manufacturer’s directions for service.
Upright Counterflow Filter Removal
To remove filters from the ductwork above an upright
counterflow installation:
1. Turn off electrical power to furnace.
2. Remove access door in ductwork above furnace.
3. Remove filters.
4. Remove blower compartment door. Vacuum compart-
ment. Replace blower compartment door.
5. Replace filters opposite of removal.
6. Replace access door in ductwork.
Horizontal Unit Filter Removal
Filters in horizontal installations are located in the central
return register.
INDUCED DRAFT AND CIRCULATION BLOWERS
The bearings in the induced draft blower and circulator blower
motors are permanently lubricated by the manufacturer. No
further lubrication is required. Check motor windings for
accumulation of dust which may cause overheating. Clean
as necessary.
