Sterling Sterco Tanks and Temperature Control Units for Efficient Hot Oil Control

FROM PROCESS Indicator

The FROM PROCESS indicator is on when the PROCESS LED screen on the controller displays the temperature of the incoming fluid.

UT Indicator

The UT indicator is on when the PROCESS LED screen on the controller displays the difference in temperature between outgoing Delivery fluid and incoming Return fluid.

FLOW Indicator

The FLOW indicator is on when the PROCESS LED screen on the controller displays the flow of fluid in liters per minute; this function requires the optional flow sensor.

Alarm Indicators

FLUID PRESSURE Indicator

The FLUID PRESSURE indicator goes on when fluid pressure is low. The TCU shuts down and resumes operation only when a proper level of fluid pressure is restored.

SAFETY THERMO Indicator

The SAFETY THERMO indicator is on when an over-temperature condition occurs. The heater outputs are then disabled, the pump continues to operate, and the COOL solenoid energizes. This is a fatal fault condition, requiring that main power be disconnected to reset the M2B controller.

HI/LO ALARM Indicator

The HI/LO ALARM indicator is on when an individually-set alarm condition occurs. The HI deviation is +200ºF (about +93ºC) above the set point. The LO deviation is -100ºF (about -37ºC) below the set point. Alarms reset automatically.

PROBE FAIL Indicator

The PROBE FAIL indicator is on when a temperature sensing probe fails. A delivery probe failure displays DEL on the screen,

and a return probe failure displays RET on the screen. The alarm resets after the failed probe is replaced.

Page 36 6017 Series Hot Oil Large Temperature Control Units