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M
AINTENANCE
T
,
O AVOID ELECTRICAL SHOCK
DISCONNECT ELECTRICAL POWER BEFORE PERFORMING ANY
. I
MAINTENANCE
F YOU MUST HANDLE THE IGNITER
. T
HANDLE WITH CARE
OUCHING THE IGNITER ELEMENT
,
WITH BARE FINGERS
ROUGH HANDLING OR VIBRATION
COULD DAMAGE THE IGNITER RESULTING IN PREMATURE
. O
FAILURE
NLY A QUALIFIED SERVICER SHOULD EVER
.
HANDLE THE IGNITER
A
I
NNUAL
NSPECTION
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 and internal to the furnace.
•
Heat exchanger. Check for corrosion and/or buildup
within the heat exchanger passageways.
•
Burners. Check for proper ignition, burner flame,
and flame signal.
•
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.
•
Use a combustion analyzer to check CO
5 minutes of run time.
F
ILTERS
T
O ENSURE PROPER UNIT PERFORMANCE
GIVEN IN THE RECOMMENDED
S
S
PECIFICATION
HEET APPLICABLE TO YOUR MODEL
F
M
ILTER
AINTENANCE
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. When replacing a filter, it must be replaced
with a filter of the same type and size.
WARNING
,
INJURY OR DEATH
,
level after
2
CAUTION
,
ADHERE TO THE FILTER SIZES
M
F
S
T
INIMUM
ILTER
IZE
ABLE OR
.
F
R
ILTER
EMOVAL
Depending on the installation, differing filter arrangements can
be applied. Filters can be installed in either the central return
register or a side panel external filter rack (upflow only). A me-
dia air filter or electronic air cleaner can be used as an alternate
filter. Follow the filter sizes given in the Recommended Mini-
mum Filter size table to ensure proper unit performance.
To remove filters from an external filter rack in an upright upflow
installation, follow the directions provided with external filter
rack kit.
H
U
F
ORIZONTAL
NIT
ILTER
Filters in horizontal installations are located in the central
return register or the ductwork near the furnace.
To remove:
1. Turn OFF electrical power to furnace.
2. Remove filter(s) from the central return register or
ductwork.
3. Replace filter(s) by reversing the procedure for removal.
4. Turn ON electrical power to furnace.
M
A
F
E
EDIA
IR
ILTER OR
Follow the manufacturer's directions for service.
B
URNERS
Visually inspect the burner flames periodically during the heat-
ing season. Turn on the furnace at the thermostat and allow
several minutes for flames to stabilize, since any dislodged
dust will alter the flames normal appearance. Flames should
be stable, quiet, soft, and blue (dust may cause orange tips
but they must not be yellow). They should extend directly
outward from the burners without curling, floating, or lifting
off. Flames must not impinge on the sides of the heat ex-
changer firing tubes.
I
D
C
NDUCED
RAFT AND
IRCULATOR
The bearings in the induced draft blower and circulator blower
motors are permanently lubricated by the manufacturer. No
further lubrication is required. Check openings on motor
housing for accumulation of dust which may cause overheat-
ing. Clean as necessary.
C
T
ONDENSATE
RAP AND
O
)
NLY
Annually inspect the drain tubes, drain trap, and field-sup-
plied drain line for proper condensate drainage. Check drain
system for hose connection tightness, blockage, and leaks.
Clean or repair as necessary.
54
R
EMOVAL
A
C
R
LECTRONIC
IR
LEANER
B
LOWERS
D
S
(Q
S
RAIN
YSTEM
UALIFIED
EMOVAL
ERVICER
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