Grant Instruments RC - Manual (Page 11)

Recirculating Chiller
Part No 09931/Issue 8 Page 11 August 2001
4.0 Safety devices
4.1 Undertemperature thermostat
See section 3.6. There is no alarm for this function.
4.2 Flow fail cut-out
If there is no liquid flow everything stops working except the controller, and the alarms operate.
When the chiller is first switched on there is no flow. Press the flow fail override switch for 5
seconds to start the flow. The alarms will switch off when the flow starts.
4.3 Overtemperature cut-out
This prevents the heater chamber from overheating. If the temperature rises above 63°C the
heater switches off and the alarms operate.
4.4 High pressure cut-out
If the pressure in the refrigeration system reaches 20 bar the cooler switches off. There is no
alarm for this function. A competent technician should reset the cut-out, refering to the service
manual for instructions.
4.5 Compressor overtemperature thermostat
If the compressor overheats the cooler will switch off. The cooler will automatically switch on
again when the compressor has cooled down. There is no alarm for this function.