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C
F
M
ABINET
INISH
AINTENANCE
Use a fine grade automotive wax on the cabinet finish to
maintain the finish's original high luster. This is especially
important in installations with extended periods of direct
sunlight.
C
O
C
(Q
LEAN
UTSIDE
OIL
The coil with the outside air flowing over it should be inspected
annually and cleaned as frequently as necessary to keep the
finned areas free of lint, hair and debris.
C
, E
ONDENSER
VAPORATOR
Bearings on the air circulating blower motor, condenser motor
and the combustion fan motor are permanently lubricated.
No additional oiling is required.
F
S
(Q
LAME
ENSOR
UALIFIED
A drop in the flame current can be caused by a nearly invisible
coating on the flame sensor. This coating, created by the fuel
or combustion air supply, can be removed by carefully
cleaning the flame sensor with steel wool.
NOTE: After cleaning, the microamp signal should be stable and
in the range of 4 - 6 microamps DC.
Flame Sensor
F
P
(Q
LUE
ASSAGES
UALIFIED
At the start of each heating season, inspect and, if necessary,
clean the unit flue passage.
C
F
P
LEANING
LUE
ASSAGES
1. Shut off electric power and gas supply to the unit.
2. Remove burner assembly by disconnecting the gas line
and removing the manifold bracket from the partition
panel.
3. Remove the flue from the induced draft blower and the
collector box cover from the partition panel.
4. The primary heat exchanger tubes can be cleaned using
a round wire brush attached to a length of high grade
stainless steel cable, such as drain cleanout cable. Attach
a variable speed reversible drill to the other end of the
spring cable. Slowly rotate the cable with the drill and
insert it into one of the primary heat exchanger tubes.
While reversing the drill, work the cable in and out several
times to obtain sufficient cleaning. Use a large cable for
the large tube, and then repeat the operation with a small
cable for the smaller tube. Repeat for each tube.
S
O
UALIFIED
ERVICER
NLY
,
I
D
M
AND
NDUCED
RAFT
OTORS
S
O
)
ERVICER
NLY
Flame
Sensor
S
O
)
ERVICER
NLY
(Q
S
O
UALIFIED
ERVICER
5. When all heat exchanger tubes have been cleaned, replace
the parts in the reverse order in which they were removed.
6. To reduce the chances of repeated fouling of the heat
exchanger, perform the steps listed in "Startup,
Adjustments, and Checks".
M
B
AIN
URNER
)
Flames should be stable, soft and blue (dust may cause
orange tips but must not be yellow). The flames must extend
directly outward from the burner without curling, floating or
lifting off.
T
O AVOID PERSONAL INJURY OR DEATH DUE TO ELECTRIC SHOCK,
DO NOT REMOVE ANY INTERNAL COMPARTMENT COVERS OR ATTEMPT ANY
ADJUSTMENT.
FLAME SHOULD DEVELOP.
At least once a year, prior to or during the heating season,
make a visual check of the burner flames.
NOTE: This will involve removing and reinstalling the heat exchanger
door on the unit, which is held by two screws. If you are uncertain
about your ability to do this, contact a qualified servicer.
If a strong wind is blowing, it may alter the airflow pattern within the
unit enough that an inspection of the burner flames is not pos-
sible.
C
B
LEANING
1. Shut off electric power and gas supply to the unit.
2. Remove the screws securing the manifold to the burner
retention bracket. Remove the manifold and rotate each
burner counterclockwise to remove.
)
NLY
Manifold
3. Remove the burners.
4. Use a bottle brush to clean burner insert and inside of the
burners.
17
F
(Q
S
LAME
UALIFIED
ERVICER
Check the burner flames for:
1. Good adjustment
2. Stable, soft and blue
3. Not curling, floating, or lifting off.
Burner Flame
WARNING
C
ONTACT A QUALIFIED SERVICER AT ONCE IF AN ABNORMAL
URNERS
Manifold Assembly
O
)
NLY
Burner
Burner
Bracket
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