Lincoln 1100 Series Service Manual page 33

MOTOR, BURNER BLOWER
This unit comes equipped to be used for other models of ovens. For use on the
Impinger II Series, the mating plug with the loose wires may be discarded.
TO REMOVE BLOWER MOTOR:
1. Shut off power at main breaker.
2. Remove conveyor.
3. Remove control compartment covers.
4. Disconnect the plug on blower motor. Plastic locks on side of plug need to be depressed.
5. Remove three screws holding blower horn to burner.
6. Remove air shutter from old unit and install on new unit. If air shutter of old unit is damaged or lost,
replace with new air shutter 369401.
7. Reassemble in reverse order.
8. Adjust air shutter opening if necessary. Set air shutter at 50% open and adjust to get a blue flame with an
occasional tip of yellow under high flame. A glass view port in the burner assembly should be used to
observe flame.
CLEANING OF THE BLOWER FAN IS NECESSARY ON A PREVENTIVE MAINTENANCE SCHEDULE.
See Blower Wheel, Burner below
BLOWER WHEEL, BURNER
This is part of the burner blower motor assembly
TO REMOVE THE BLOWER WHEEL FOR PERIODIC CLEANING:
1. Disconnect power and remove control compartment covers.
2. Remove air shutter held by 3 screws.
3. Loosen set screw on blower wheel hub and pull straight out.
4. Reassemble in reverse order.
NOTE: There is no critical placement of the blower wheel on the motor shaft. Just
back as far as it will go and then spin the blower to be sure it is not rubbing.
AIR PRESSURE SWITCH
1. Shut off power at main breaker.
2. Remove conveyor.
3. Remove front control compartment cover.
4. Remove air switch cover plate.
5. Disconnect wiring and mark for reassembly.
6. Loosen 2 screws and remove air switch.
7. Disconnect 1/4" air tube.
8. Reassemble in reverse order.
9. Turn on power and calibrate air switch as follows:
a) Turn adjusting screw counter clockwise to full out position.
b) Turn main fan and heat switch on.
c) Turn adjusting screw clockwise until heat shuts off.
d) Turn adjusting screw (counterclockwise) 1/4 turn and unit should heat.
NOTE: Test as follows
e) Oven must be tested in heated condition.
f) Remove main fan fuse. Main fan should shut down, deactivating air switch causing
heat to shut off in approximately 5 to 25 seconds.
g) Fine tune adjustment as needed.
Impinger II –1100 Series Service Manual - Domestic 33