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and hail guard louvers (optional) as necessary using a mild
detergent and water. Rinse thoroughly with water.
Electrical — Inspect the electrical connections for tightness
at the beginning of each heating and cooling season.
Service as necessary.
!
CAUTION:
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation.
Motor Lubrication — The motors for the circulating air
blower, outdoor fan, and combustion blower are pre-
lubricated at the factory. No further oiling is required for the
life of this product.
!
WARNING:
Lubrication of the motors in this unit is not
required. Do not lubricate any motor in this
product.
Blower Compartment — The blower compartment should
be cleaned monthly during the heating and cooling seasons
to remove any dirt and lint that may have accumulated in
the compartment or on the blower and motor. Buildup of dirt
and lint on the blower and motor can create excessive loads
on the motor resulting in higher than normal operating
temperatures and possible shortened service life.
Heat Exchanger and Burner Maintenance — The unit
should operate for many years without excessive scale
buildup in the heat exchanger, however, the heat exchanger,
the vent system, and the burners should be inspected and
cleaned (if required) by a qualified serviceman annually to
ensure continued safe operation. Particular attention must
be given to identify deterioration from corrosion or other
sources.
WARNING:
!
Holes in the heat exchanger can cause products
of combustion to enter the home. Replace the
heat exchanger if leaks are found. Failure to
prevent products of combustion from being
circulated into the living space
potentially hazardous conditions including
carbon monoxide poisoning that could result in
personal injury or death
can create
.
Cleaning of Heat Exchanger — If the heat exchanger
must be cleaned due to soot or scale build up, follow the
steps below.
1.
Shut off the gas supply to the unit either at the meter
or at the manual valve in the gas supply piping.
2.
Turn off all power to the unit and set the thermostat
to the lowest temperature setting.
3.
Remove the louvered control access panel from the
unit.
4.
Turn the gas control knob on the gas valve to the
"OFF" position.
5.
Disconnect the wires from the gas valve, ignitor,
flame sensor, combustion air motor, flame roll-out
control, over-temperature limit switch, and pressure
switch.
6.
Remove the silicone rubber tube from the collector
pan to the pressure switch.
7.
Remove the four nuts that hold the combustion
blower to the collector pan and remove the complete
combustion blower.
8.
Remove the screws that hold the collector pan in
place, and remove the collector pan from the unit.
9.
Using wrenches, separate the ground-joint union in
the gas supply piping at the unit.
10.
Remove the piping between the gas valve and the
ground-joint union, if necessary.
11.
Remove the screws that hold the burner assembly in
place and remove the burner assembly. BE
EXTREMELY CAREFUL NOT TO DAMAGE THE
IGNITOR WHILE REMOVING THE BURNER
ASSEMBLY.
12.
The unit heat exchanger tubes can now be cleaned
by the use of a round wire brush attached to a length
of high grade stainless steel cable, such as drain
cleanout cable. Attach variable speed reversible drill
to the other end of the spring cable. Slowly rotate the
cable with the drill and insert it into the top portion of
the heat exchanger. While reversing the drill, work
the cable in and out several times to obtain sufficient
cleaning. Repeat this sequence for each heat
exchanger tube.
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