SCHEDULED MAINTENANCE
48
MAINTENANCE
ANNUAL INSPECTION
T
O
AVOID
ELECTRICAL
SHOCK
,
INJURY
OR
DEATH
,
DISCONNECT
ELECTRICAL
POWER
BEFORE
PERFORMING
ANY
MAINTENANCE
. I
F
YOU
MUST
HANDLE
THE
IGNITER
,
HANDLE
WITH
CARE
. T
OUCHING
THE
IGNITER
ELEMENT
WITH
BARE
FINGERS
,
ROUGH
HANDLING
OR
VIBRATION
COULD
DAMAGE
THE
IGNITER
RESULTING
IN
PREMATURE
FAILURE
. O
NLY
A
QUALIFIED
SERVICER
SHOULD
EVER
HANDLE
THE
IGNITER
.
WARNING
The furnace should be inspected by a qualified install
-
er, 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 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.
FILTERS
FILTER 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. 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 arrange
-
ments can be applied. Filters can be installed in either the
central return register or a side panel external filter rack
(upflow only). A media air filter or electronic air cleaner
can be used as an alternate filter. Follow the filter sizes
given in the Recommended Minimum 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.
Horizontal Unit Filter Removal
Filters in horizontal installations are located in the cen-
tral 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.
Media Air Filter or Electronic Air Cleaner Removal
r Cleaner oval
Follow the manufacturer’s directions for service.
BURNERS
Visually inspect the burner flames periodically during the
heating 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 exchanger firing tubes.
INDUCED DRAFT AND CIRCULATOR BLOWERS
T
O
ENSURE
PROPER
UNIT
PERFORMANCE
,
ADHERE
TO
THE
FILTER
SIZES
GIVEN
IN
THE
RECOMMENDED
M
INIMUM
F
ILTER
S
IZE
T
ABLE
OR
S
PECIFICATION
S
HEET
APPLICABLE
TO
YOUR
MODEL
.
CAUTION
The bearings in the induced draft blower and circula-
tor 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.
CONDENSATE TRAP AND DRAIN SYSTEM (QUALIFIED
SERVICER ONLY)
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.
