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2-19. CONTACTORS
Primary
Heat
30
31
34
35
1103
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
( 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
32
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:
36
Test Points
From 23 to 29
From 24 to 28
From 25 to 27
From 30 to 34
From 31 to 35
From 32 to 36
From 33 to 37
From 22 to 26
Model 590/592
420° F
Results
open circuit
open circuit
open circuit
open circuit
open circuit
open circuit
ohm reading 1700
ohm reading 415
2-17
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