Lincoln 1421-000-E THERMOSTAT, Oven Cavity HI-LIMIT Replacement, AIR Pressure Switch Replacement

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THERMOSTAT, OVEN CAVITY HI-LIMIT – REPLACEMENT

1.Shut off power at main breaker.

2.Remove control box cover and front panel. Remove conveyor assembly and fingers from oven to aid in removal of thermostat from oven.

3.Disconnect wires from thermostat and mark for reassembly.

4.Remove thermostat from oven.

5.Reassemble in reverse order and check system operation.

AIR PRESSURE SWITCH – REPLACEMENT

1.Shut off power at main breaker.

2.Remove control panel top and front cover.

3.Disconnect wires from air pressure switch and mark for reassembly.

4.Remove air switch tube from air pressure switch.

5.NOTE: There are two types of air pressure switches used. Remove air pressure switch from its mount.

6.Reassemble in reverse order and check system operation.

7.To adjust air pressure switch, remove cover from switch to expose adjusting screw. To increase sensitivity, turn screw counter-clockwise. To decrease sensitivity, turn screw clockwise.

THERMOCOUPLE (TYPE K) - 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

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Impinger I -–Adv Digital – Electric Service Manual - International

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Contents Impinger Conveyor Ovens Temperature Control PhasePower Supply Control BOX AutoModel 220/380VAC 50 HZ Schematic Diagram Serial Number N28654 and Above Troubleshooting Guide Symptom Possible Cause Evaluation With Power on and Thermocouple Impinger Advantage Series Before Removing or Installing ANY Component in the ImpingerOven be Sure to Disconnect Electrical Power and GAS Supply Belt JAMFAN Spider FAN HUB Cone Thermocouple Type K Replacement THERMOSTAT, Oven Cavity HI-LIMIT ReplacementAIR Pressure Switch Replacement Thermocouple Measurment Temperature Millvolts ApproxCAPACITOR, Conveyor Motor Replacement Control Transformer ReplacementConveyor Drive Motor Replacement Reversing Switch ReplacementHeat Contactor Replacement Fuse Holder ReplacementBEARING, Conveyor Replacement HI-LIMIT Contactor ReplacementTHERMOSTAT, Control BOX HI-LIMIT Replacement General View Advantage Series Letter Part Number DescriptionPage Control BOX Letter DescriptionPage Oven Back GAS and ElectricPage Conveyor SeriesPage This page intentionally left blank This page intentionally left blank