Middleby Marshall PS360, PS570, PS200 Appendix - DIP switch settings for Conveyor Speed Controller

SECTION 3 - SERVICING COMPONENTS

Appendix - DIP switch settings for Conveyor Speed Controller

with Digital Display (P/N 37337), 4/02

II. TEMPERATURE CONTROLLER

The Temperature Controller is used to set and control the oven temperature. Depending on the oven, model, the con- troller has several functions:

•On gas ovens with On-Off gas valve operation, the tem- perature controller opens and closes the high flame solenoid. This allows 100% or 0% gas flow to the burner in response for the need for heat to maintain the set point temperature. The temperature controller has no effect on the low flame bypass or oven ignition.

For this operating mode, the temperature controller is set to the On-Off Mode as described in the Kit instructions.

•On gas ovens with modulated gas valve (PID) opera- tion, the temperature controller sends a signal to the amplifier board which in turn controls the operation of the modulating valve. This allows a modulated gas flow of any necessary value from 0-100% in response for the need for heat to maintain the set point. The tem- perature controller has no effect on oven ignition.

For this operating mode, the temperature controller is set to the PID Mode as described in the Kit instructions.

•On electric ovens with On-Off heater activation (includ- ing most PS200-series and PS360-series electric ov- ens), the temperature controller permits or cuts power to the heating elements as necessary to maintain the set point temperature.

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For this operating mode, the temperature controller is set to the On-Off Mode as described in the Kit instructions.

On electric ovens with variable pulse heater activation (including PS555 electric ovens), the temperature con- troller sends its signal to a controller module that con- tains an amplifier board and two solid state relays. The relays activate the heating elements at 100% power on a fixed cycle time, for a length of time proportional to the signal from the temperature controller.

For this operating mode, the temperature controller is set to the PID Mode as described in the Kit instructions.

Note that temperature controller P/N 46837 (inc. with Service Kit 47321) includes a dedi- cated variable pulse mode intended for the PS536 electric oven. This special mode is NOT used on the PS555.

The temperature controller regulates the cooldown func- tion. NOTE: PS200VL-series ovens do not include a cooldown function.

On most PS200-series and PS300-series gas ovens (except the PS200VL), the temperature controller moni- tors the high limit. All other oven models use a High Limit Control Module that is independent of the tem- perature controller.

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