Operating manual 27.09.2011 CC Heating Thermostats - HUBER

Switching on the temperature control unit
Switch on the unit using the mains switch (36). The unit performs initialisation tests, to
check the full functionality of the thermoregulation unit. The control electronics first
check the heaters, the sensors and then relays. If an error, or warning condition, arises,
a message will be shown on the graphic display (60) giving details of the problem. For
further information and assistance please contact our Customer Support Team.
Setting the over-temperature (OT) switch
(also valid for Chillers with heating)
General Information
The over-temperature switch is an independent function of the CC-Pilot. The software
and hardware is configured so that essential functions and operations are tested during
the self-test when the unit is first powered on. If a problem arises then the unit is
automatically prevented from operating until the problem is rectified. During these tests
the sensors are tested for short- and open- circuits.
The constant monitoring of the internal temperature provides safety for the connected
application. It should be set immediately after being filled with thermal fluid.
Risk of overheating! To ensure proper operation of the unit, the overtemperature
switch should be tested at least monthly, and after changing
the thermal fluid.
Fire danger! The over-temperature switch should be set at least 25K below
the burning point of the thermal fluid.
Information! When received, the cut-off will be set to 35°C. If the
temperature of the thermal fluid is higher then this, the machine switches
off and an alarm will be given.
Temperature control units with the CC-Pilot controller not only offers the possibility to
adjust the safety (cut-off) value of the over-temperature protection but to define the
cut-off behaviour of the temperature control unit. Normally a temperature control unit
would trip and switch-off temperature control and circulation after having reached the
safety cut-off value. This is to prevent possible danger of overheating. A shutdown of
the unit could also be caused through a large exothermic reaction. A shutdown of the
unit in this situation would be fatal. The Peter Huber Kältemaschinenbau GmbH offers
the possibility to use the cut-off mode Process Safety. Temperature control (cooling)
and circulation remain on. The unit could therefore react to the exothermical reaction.
Menu points for the over-temperature protection are listed below.
61