Table of Contents
Advertisement
MAINTENANCE
Have the gas heating section of the unit checked at least once
a year before the heating season begins, to be sure that the
combustion air inlet and flue outlet hoods are not blocked by
debris, which would prevent adequate combustion air and a
properly operating vent system.
F
R
C
ILTER
EPLACEMENT OR
A return air filter is not supplied with this unit; however, there must be a means of filtering all of the return air. The filter(s) may be
located in the return air duct(s), or return air filter grille(s). Consult with your installing dealer for the actual location of the return
air filter(s) for your unit.
Dirty filters are the most common cause of inadequate heating or cooling performance. Filter inspection should be made at least
every two months; more often if necessary because of local conditions and usage.
Dirty throwaway filters should be discarded and replaced with a new, clean filter. Dirty permanent filters should be washed with
water, thoroughly dried and sprayed with a filter adhesive before being reinstalled. (Filter adhesives may be found at many hardware
stores.) Permanent filters should last several years. However, should one become torn or uncleanable, it should be replaced.
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
UALIFIED
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.
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.
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
F
(Q
AIN
URNER
LAME
UALIFIED
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.
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
possible.
LEANING
S
O
)
ERVICER
NLY
I
D
M
AND
NDUCED
RAFT
OTORS
S
O
)
ERVICER
NLY
S
O
)
ERVICER
NLY
(Q
S
O
UALIFIED
ERVICER
NLY
S
O
)
ERVICER
NLY
)
19
Flame
Sensor
Flame Sensor
Advertisement
Table of Contents
