Belshaw Brothers 624, 618L, 634 manual Testing the Continuity of the Thermostat

Testing the Continuity of the Thermostat

WARNING

To avoid the possibility of electric shock, disconnect the machine from the power source before testing.

1.Disconnect the machine from the power supply.

2.Disconnect the terminal wires from the thermostat.

3.Connect the continuity tester across the B terminals indicated in Figure B-2. This set of contacts should be closed whenever the thermostat is on. To test, start with the thermostat in the OFF position. Then turn the thermostat up until you hear a distinct click (at about the 175“ F/79“ C setting). At this time, there should be continuity across the B terminals.

4.Connect the continuity tester across the A terminals indicated in Figure B-2. Start with the thermostat in the OFF position and turn the thermostat up until you hear a distinct click. If there is no continuity (the indicator or light does not come on), proceed to

step 5.

5.With the continuity tester still connected, turn the thermostat knob to OFF and remove the knob. There is an adjusting screw in the center of the knob stem. Turn it counter- clockwise until there is continuity. If there is no continuity (the indicator or light does not come on), then the thermostat is defective. If there is continuity, proceed to step 6.

6.Immerse the thermostat sensing bulb in a pan of boiling water and set the thermostat at about 212“ F/100“ C. The continuity tester’s indicator or light should go off. If the indicator or light does not go off, increase the temperature

setting of the thermostat until it does. Then recalibrate the thermostat according to the manufacturer’s instructions. If the indicator or light will not go off at any setting or recalibration, then the thermostat is defective.

“B” terminals

“A” terminals

Figure B-2. Thermostat Terminals.

Belshaw Bros., Inc. š 1750 22nd Ave. S. š Seattle, WA 98144 š Phone 206-322-5474 š Fax 206-322- 5425

618L, 624, and 634 Electric Fryers MN-1126EN 17