Welbilt Frymaster FPLHDC265 Service And Parts Manual page 7

HIGH EFFICIENCY DECATHLON FPLHDC65 GAS FRYERS
CHAPTER 1: SERVICE PROCEDURES
commands from one central point. Two types of interface boards may be used in LHDC Series
gas fryers; the type used depends on the fryer configuration.
In units configured for electronic ignition and constant pilot, P/N 826-2434 is used; in units
configured with a manually lit pilot (non-electronic ignition), P/N 826-2425 is used.
106-3729 (24V): These boards are used in LHDC fryers equipped with Thermatron control
systems.
THERMATRON BOARD P/N 106-3729
Thermatron systems incorporate a temperature probe, a potentiometer, and a temperature
control circuit board. This system is more accurate and reliable than a standard thermostat.
The temperature probe measures oil temperature via resistance (ohms); as oil temperature
rises, resistance decreases. The potentiometer sets the oil temperature via resistance (ohms).
The temperature control circuit board compares the resistance from the probe and
potentiometer and cycles the burner on and off as necessary.
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