2-19. CONTACTORS
Primary
Heat
30 31 32
34 35 36
1103
Model 590/592
The electric fryer requires two switching contactors: a primary and a heat contactor. The primary contactor energizes (contacts close) any time the POWER/PUMP switch is in the POWER position, and the temperature of the shortening is below 420° F ( 215° C). The high limit cuts power at the primary contactor if the temperature of the shortening is above 420° F ( 215° C). The primary contactor supplies power to one side of the heat contactor.
The heat contactor is controlled by the computer controller. When the controller calls for heat, the heat contactor applies power to one side of the heating elements. When the heat con- tactor and primary contactor are energized (contacts closed) the electric heating elements heat the shortening.
The photo shows a mercury heat contactor, but CE coun- tries will have an electromechanical heat contactor.
Checkout
1.Remove electrical power supplied to the fryer.
To avoid electrical shock or property damage, move the power switch to OFF and disconnect main circuit breaker, or unplug cord at wall receptacle.
2.Remove the control panel.
3.Label and remove wires from contactors and perform a check on both contactors as follows:
Test Points | Results |
From 23 to 29 | open circuit |
From 24 to 28 | open circuit |
From 25 to 27 | open circuit |
From 30 to 34 | open circuit |
From 31 to 35 | open circuit |
From 32 to 36 | open circuit |
From 33 to 37 | ohm reading 1700 |
From 22 to 26 | ohm reading 415 |