Sigma 1456 THERMOSTAT, Cooling FAN Replacement, Burner Blower Motor Replacement, Burner Assembly

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THERMOSTAT, COOLING FAN - REPLACEMENT

1.Shut off power at main breaker.

2.Remove control panel top and front cover.

3.Remove lead wires and mark for reassembly.

4.Remove two (2) screws and remove thermostat.

5.Reassemble in reverse order.

BURNER BLOWER MOTOR - REPLACEMENT

1.Shut off power at main breaker.

2.Remove control panel top and front cover.

3.Unplug motor connector.

4.Remove three (3) screws from blower tube at burner housing.

5.Remove air shutter assembly from old motor for installation on new motor assembly.

6.Reassemble in reverse order and check system operation.

NOTE: Check air shutter adjustment and adjust if necessary Set air shutter at approx. 1/4" and adjust to get a blue flame with an occasional tip of yellow under high flame. A view port in the burner assembly should be used to observe flame.

BLOWER WHEEL, BURNER

This is part of the burner blower motor assembly.

TO REMOVE THE BLOWER WHEEL FOR PERIODIC CLEANING:

1.Shut off power at main breaker.

2.Remove control panel top and front cover.

3.Remove air shutter held by 3 screws.

4.Loosen set screws on blower wheel hub and pull straight out.

5.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.

BURNER CONTROL – REPLACEMENT (S/N N31348 and Below)

1.Shut off power at main breaker.

2.Remove control panel top and front cover.

3.Remove front portion of control by releasing tabs on sides and pulling out (rocking motion).

4.Remove wires from plug in terminal strip, note wire numbers and location.

5.Remove two screws from mounting bracket and remove.

6.Reassemble in reverse order and check system operation.

BURNER CONTROL – REPLACEMENNT (S/N N31349 and above)

1.Shut off power at main breaker.

2.Remove control panel top and front cover.

3.Remove wires from control. Mark all wiring for reassembly.

4.Remove two mounting screws from control and remove control.

5.Reassemble in reverse order and check system operation.

BURNER ASSEMBLY

1.Shut off power at main breaker.

2.Shut off gas supply.

3.Remove control panel top and front panel.

4.Remove gas control valve (See "GAS CONTROL VALVE")

5.Disconnect pilot tube.

6.Remove solenoid valve. (See "TEMPERATURE REGULATION VALVE")

7.Remove four (4) screws that secure the burner backing plate.

Impinger I – Adv Digital – Gas Service Manual – International

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Contents Impinger Conveyor Ovens Temperature Control Power SupplyNAT. GAS LP GASSchematic Diagram Serial Number N28654 to N31348 Serial Number N31349 and Above Symptom Possible Cause Evaluation With Power OFF Remove 3 prong plug on gas Not stay on, check the reset button for the ignition Page Belt JAM With Power on and ThermocoupleSensor sensor is located in the conveyor motor CAPACITOR, Motor Replacement FAN, Main ReplacementCooling FAN, Control BOX Replacement Impinger Advantage SeriesBurner Blower Motor Replacement THERMOSTAT, Cooling FAN ReplacementTo Remove the Blower Wheel for Periodic Cleaning Burner AssemblySWITCH, Burner Reset Replacement Temperature Regulation Valve ReplacementBurner Ignitor Replacement THERMOSTAT, Oven Cavity HI-LIMIT ReplacementBurner Alarm Replacement Spark Generator ReplacementControl Transformer Replacement Thermocouple Measurment Temperature Millvolts ApproxConveyor Drive Motor Replacement CAPACITOR, Conveyor Motor ReplacementON-OFF Switch Replacement Pilot Orifice ReplacementOven Control Replacement Fuse Holder ReplacementLetter Part Number Description General View Advantage SeriesPage 1456,1457,1433-000-E, 1434-000-E Control BOXPage GAS and Electric Oven BackPage Conveyor 1450 Series Page This page intentionally left blank This page intentionally left blank

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