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Flooded type water cooled screw chiller (MIC)
MCAC-CTSM-2018-1
30
2).Cooling stop
Stop
Running time is
enough
Unload to 50% step
Unload to 25% step
Compressor OFF
Compressor 25% SV OFF
YES
Cooling tower off
Cooling pump off
Chilled pump off
Stop
NO
4.
Sensors
1).Temperature sensors
The temperature sensors that unit users are all NTC thermistors, including chilled leaving water
temperature, chilled entering water temperature, discharge temperature, EXV discharge temperature.
NO.
Name
Type
Remark
1
Chilled entering water temp.
NTC,10k@25
℃
Emerson
2
Chilled leaving water temp.
NTC,10k@25
℃
Emerson
3
Cooling entering water temp.
NTC,10k@25
℃
Emerson
4
Cooling leaving water temp.
NTC,10k@25
℃
Emerson
5
Discharge temp.
50k@25
℃
6
EXV discharge temp.
NTC,50k@25
℃
CAREL
7
Pipe temp.
Emerson
Thermistors
For PTC thermistors, resistances vary with various temperatures.
Location
Motor thermistor are located in the motor winding and are connected to the compressor protection
module which will cut off the main power when motor winding temperature exceeds 110 °C. Water