Frymaster H55 Series Technical Reference Manual page 39

Components
Contactors
A latching contactor and a heating contactor control power to the elements. The latching
contactor engages when the main power switch is turned on and the hi-limit and drain switches
are closed. The heating (or cycling) contactor energizes as the controller calls for heat. If the
high-limit thermostat or the drain safety switch is open, power is cut to the coil of the latching
relay.
In most cases, the latching contactor is activated at the beginning of the workday, and
deactivated at closing. The 24VAC coil of the latching contactor is wired in series with the latch
relay contacts. Heating contactors, also mechanical, are a more robust design and cycle each
time the controller calls for heat.
Latching 40 amp contactor. (3-10 ohms
on coil)
Electric Fryers
Latching contactor with cover
removed.
3-6