Midea LSBLG320/MZ - Cooling Stop; Sensors; Temperature Sensors; Thermistors

MCAC-CTSM-2014-03 DX type water-cooled screw chiller (PCB Control)
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2) Cooling stop
4. Sensors
1).Temperature sensors
The temperature sensors that unit use are all NTC thermistors, including chilled leaving water
temperature, chilled entering water temperature, discharged temperature, EXV suction temperature.
NO.
Name
Type
Remark
1
Chilled entering water temp.
NTC,10k@25℃
Emerson
2
Chilled leaving water temp.
NTC,10k@25℃
Emerson
3
EXV suction temp.
NTC,10k@25℃
Carel
4
Lubrication oil temperature
NTC,10k@25℃
Emerson
Thermistors
For PTC thermistors, resistances vary with various temperatures.
 Location
Motor thermistor locates in the motor winding and is connected to the compressor protection module
which will cut off the main power when motor winding temperature exceeds 110 °C. Water temperature
thermistors are installed in wells on chilled water inlet/outlet and cooling water inlet/outlet. Refer to the
electric control wiring diagram for detail connection information.
stop
Running time
is enough
NO
Stand by
YES
Unload to 50% step
Unload to 25% step
Compressor off
Compressor 25%SV off
Cooling tower off
Cooing pump off
Chilled pump off