Page 61
507232-04 7/2017
WARNING
This product contains a chemical known to the State
of California to cause cancer, birth defects, or other
reproductive harm.
B-Lubrication
All motors are lubricated at the factory. No further lubrication
is required.
Blower shaft bearings are prelubricated. For extended
bearing life, relubricate at least once every two years with a
lithium base grease, such as Alvania 3 (Shell Oil), Chevron
BRB2 (Standard Oil) or Regal AFB2 (Texas Oil). Use a hand
grease gun for relubrication. Add only enough grease to
purge through the bearings so that a bead of grease
appears at the seal lip contacts.
C-Burners (Gas Units)
1- Periodically examine burner flames for proper
appearance during the heating season.
2- Inspect the position of the flame sensor. Sensor should
be centered in the path of the flame.
3- Before each heating season examine the burners for any
deposits or blockage which may have occurred. Clean
burners as follows.
4- Turn off the electrical power and gas supply to the unit
and open heat section access panel.
5- Remove and retain two screws securing burners to the
burner support. See figure 59. Clean as necessary.
Replace burners and secure with retained screws.
WARNING
Danger of explosion. Can cause injury or
death. Do not overtighten main burner
mounting screws. Snug tighten only.
6- Remove and retain the two screws securing the ignitor
to the burner support. Remove the burner and check
the spark gap with appropriately sized twist drills or
feeler gauges. See figure 60.
7- Replace the ignitor and secure in place with retained
screws.
8- Restore electrical power and gas supply. Follow lighting
instructions attached to unit and use inspection port in
access panel to check flame.
D-Combustion Air Inducer (Gas Units)
A combustion air proving switch checks combustion air
inducer operation before allowing power to the gas
controller. Gas controller will not operate if inducer is
obstructed.
Under normal operating conditions, the combustion air
inducer wheel should be checked and cleaned prior to the
heating season. However, it should be examined
periodically during the heating season to establish an ideal
cleaning schedule. With power supply disconnected, the
condition of the inducer wheel can be determined by
removing the combustion air inducer.
BURNER BOX ASSEMBLY
FIGURE 59
GAS
MANIFOLD
FLAME
SENSOR
GAS
VALVE
BURNERS
REMOVE
SCREWS
TO CLEAN
BURNERS
BURNER
SUPPORT
IGNITOR
IGNITOR
SPARK GAP
SHOULD BE 1/8”
(3mm)
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