Carel MuChiller UCHBD00001130, Руководство пользователя

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equivalent temperature (par. C017), frost protection alarm thresholds (par. U050 and S057) and MOP
threshold (to control the maximum evaporation temperature, par. E020 and E022).
User Code Description Def Min Max UOM
S P000 Min evaporation temp.: custom limit -25.0 -99.9 999.9 °C/°F
S P001 Max condensing temp.: custom limit 70.0 -99.9 999.9 °C/°F
M C017 Max high pressure threshold (HP) 65.0 0.0 999.9 °C
M C018 Min low pressure threshold (LP) 0.2 -99.9 99.9 bar
S U050 User side frost protection: alarm threshold -0.8 -99.9 999.9 °C
S S057 Source frost protection: alarm threshold -0.8 -999.9 999.9 K
M E020 MOP in cooling: threshold 30.0 -60.0 200.0 °C
M E022 MOP in heating: threshold 20.0 -60.0 200.0 °C
Below is the description of the working zones in a generic envelope for a BLDC compressor:
Fig.5.l
Zone Par. Description
1
Zone inside the operating limits (the prevention function is still active to prevent operation outside of the
limits)
2 Minimum evaporation pressure
2 c P000 Custom minimum evaporation pressure threshold
3 Maximum compression ratio 1
4 Maximum compression ratio 2
5 Maximum condensing pressure
5 c P001 Custom maximum condensing pressure threshold
6 Maximum motor current
7 Maximum evaporation pressure
8 Minimum compression ratio
9 Minimum differential pressure
10 Minimum condensing pressure
11 High discharge temperature (but working pressure inside the envelope)
When the compressor working point is outside of the envelope, an alarm delay starts counting: if the
working point remains outside of the envelope, when the delay expires, a specific alarm is activated that
stops the compressor; if, on the other hand, the working point returns back inside the envelope limits, the
alarm delay is reset.
The high condensing pressure limit is determined by the minimum between:
l
the nominal compressor threshold;
l
the threshold modifiable by Service (par. P001).
The high evaporation pressure limit is determined by the minimum between:
l
the nominal compressor threshold;
l
the set MOP threshold (par. E020: chiller and E022: heat pump);
The low evaporation pressure limit for the prevention action is determined by maximum between:
ENG
µC0300053EN rel. 1.0 – 23.07.2018
5. Functions | 57