Lincoln 1450 - Manual (Page 11)

Impinger I – 1450 Series Service Manual - Domestic 11
BURNER IGNITOR - REPLACEMENT
1. Shut off power at main breaker.
2. Remove control panel top and front cover.
3. Remove burner assembly. (SEE "BURNER ASSY.")
4. Remove pilot shield and pilot shield extension.
5. Remove burner ignitor.
6. Reassemble in reverse order (spark gap approx. .100 in. or 2.5 mm)
NOTE: Be sure to reconnect burner ignitor cable to ignition control.
THERMOCOUPLE - REPLACEMENT
1. Shut off power at main breaker.
2. Remove control panel top and front cover.
3. Slide thermocouple out of oven chamber.
NOTE: Remove conveyor and bottom fingers to aid in removal and installation of thermocouple.
4. Remove two (2) wires from temperature control. Make note of wire numbers or color and location for
reinstallation.
5. Reassemble in reverse order making sure the metal end on the thermocouple is in the wire form in the
oven chamber.
THERMOCOUPLE MEASURMENT
TEMPERATURE D.C. MILLVOLTS (APPROX.)
200 ° 2.8
250 ° 4.0
300 ° 5.1
350 ° 6.0
400 ° 7.1
450 ° 8.2
500 ° 9.3
550 ° 10.4
600 ° 11.5
BURNER CONTROL TRANSFORMER - REPLACEMENT
1. Shut power off at main breaker.
2. Remove control panel top and front cover.
3. Remove two (2) wires on primary side, note color and location.
4. Remove two (2) wires on secondary side, note color and location.
5. Remove two (2) screws from transformer base and replace assembly.
6. Reinstall in reverse order and check system operation.
CONTROL TRANSFORMER – REPLACEMENT
See “BURNER CONTROL TRANSFORMER – REPLACEMENT”
CONVEYOR DRIVE MOTOR - REPLACEMENT
1. Shut power off at main breaker.
2. Remove control panel top and front cover.
3. Loosen set screw on conveyor drive sprocket and slide sprocket off shaft.
4. Disconnect motor plug.
5. Remove four (4) screws from motor frame, on control box side, and remove motor assembly.
6. Reassemble in reverse order making sure to align chain sprockets and adjust motor for proper chain
tension (1/2" SAG).