Carel MuChiller UCHBD00001130, Руководство пользователя

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User Code Description Def Min Max UOM
S S046 Defrost: min duration 1 0 99 min
S S047 Defrost: max duration 5 0 99 min
Example of defrost activation:
Fig.5.y
Key
T Temperature
End Thrs End defrost temperature
Res Thrs Reset start defrost delay threshold
Set Thrs Start defrost temperature
D1 Defrost start delay
Start Start defrost
End End defrost
T_Cond Condensing temperature
T_Evap Evaporation temperature
If the defrost temperature does not exceed the reset threshold during the defrost start delay, then the
defrost starts. It ends when the reference probe (pressure transducer, high pressure side -> condensing
temperature in the graph) exceeds the end defrost temperature or the maximum defrost duration has
elapsed.
Note: for optimal defrost management, it is recommended to set the start defrost temperature to
the evaporation temperature value at which ice starts forming on the coil (-1.0°C / -1.5°C); the defrost
start delay expresses the time needed to accumulate a layer of ice that requires defrosting (30-60
minutes). Also see the paragraph “Sliding defrost”.
5.17.1 Defrost procedure
Note: in the following description:
l
"case with compressor ON" indicates that the phase is only featured if defrost is set with the
compressor On;
l
"case with compressor off" indicates that the phase is only featured if defrost is set with the
compressor Off;
End defrost can be managed in two ways:
l
with the compressor off: the thermal inertia of the condenser is used to end the defrost;
l
with the compressor on: to make the defrost as fast as possible.
User Code Description Def Min Max UOM
M S055
Compressor after defrost
0/1=On/Off
0 0 1 -
Compressor off at end defrost: Compressor on for the entire defrost
ENG
µC0300053EN rel. 1.0 – 23.07.2018
5. Functions | 71