Frymaster H55 Series Technical Reference Manual page 107

Transformer Box Holds Control Reset Relay
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The transformer box, mounted at the back of the gas fryers, is annotated above. This is a 2-vat McDonald's unit and
includes a hood relay, which is unique to the McDonald's box. Other gas touchscreens have the same transformer box
confi guration minus the hood relay.
1 Filter pump relay
2 Filter pump transformer, 24VAC, 50VA
3 Control reset relay
4 Right (on two vat confi guration) or 2nd pot transformer 24VAC, 80VA
5 Left (on two vat confi guration) or 1st pot transformer 24VAC, 80VA
6 Hood relay (McDonald's only)
Th e Fryer's Communications in 3 Graphics
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Th e following graphics and related text describe the operation of the fryer's communication system.
Th e fi rst graphic shows the system on just one vat, establishing the role of the CAN-bus, which shares
information across the SIB's, controllers, FIB and OQS, components that collect data on multiple vats.
Th e P-bus carries data between a VIB and SIB.
Th e second graphic shows an expanded view of the communication system. Th ere is a separate P-Bus
cable for each VIB.
Th e third graphic and accompanying photos describe the OIB circuit, which is only used on gas
fryers.
Touchscreen-Equipped Fryers
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