Installations Instructions
54
M
AINTENANCE
T
O
AVOID
ELECTRICAL
SHOCK
,
INJURY
OR
DEATH
,
DISCONNECT
ELECTRICAL
POW ER
BEFORE
PERFORM ING
ANY
M AINTENANCE
. I
F
YOU
M UST
HANDLE
THE
IGNITER
,
HANDLE
W ITH
CARE
. T
OUCHING
THE
IGNITER
ELEM ENT
W ITH
BARE
FINGERS
,
ROUGH
HANDLING
OR
VIBRATION
COULD
DAM AGE
THE
IGNITER
RESULTING
IN
PREM ATURE
FAILURE
. O
NLY
A
QUALIFIED
SERVICER
SHOULD
EVER
HANDLE
THE
IGNITER
.
WARNING
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 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
2
level after
5 minutes of run time.
FILTERS
T
O
ENSURE
PROPER
UNIT
PERFORM ANCE
,
ADHERE
TO
THE
FILTER
SIZES
GIVEN
IN
THE
RECOM M ENDED
M
INIM UM
F
ILTER
S
IZE
T
ABLE
OR
S
PECIFICATION
S
HEET
APPLICABLE
TO
YOUR
M ODEL
.
CAUTION
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 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.
HORIZONTAL UNIT FILTER REMOVAL
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.
MEDIA AIR FILTER OR ELECTRONIC AIR CLEANER REMOVAL
Follow the manufacturer’s directions for service.
BURNERS
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.
INDUCED DRAFT AND CIRCULATOR BLOWERS
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.
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.