1143W24E4.00 · EV3 200 Web
03/2021
| 24 |
6.3.2 Defrost with cycle reversed (hot gas)
Defrost with cycle reversed is obtained by setting d1 = 1.
Activating defrost
When defrost is activated:
• The compressor is activated (or has already been active for time d15) and remains active for the entire duration of
defrost;
• The relay output where the valve is connected (a solenoid valve if the system has a thermostatic valve) is activated.
Conditions for defrost end
The conditions for defrost end are:
•
Maximumdefrostduration,setbyparameter
d3
,mustbereached.
•
Temperaturetoenddefrost,setbyparameter
d2
,mustbereached.
The defrost configuration parameters with cycle reversed are:
Par. Description
MU
Range
C0 Compressor ON delay from power-on.
min
0...240
C2
MinimumcompressorOFFtime.
min
0...240
d0 Defrost interval.
h
0...99
d1
Type of defrost.
0 = Electrical heaters;
1 = Cycle reversed (hot gas);
2 = When compressor stops.
---
0...2
d2 Evaporator temperature above which defrost with evaporator probe terminates (Pr3 = 5).
°C/°F
-99.0...99.0
d3 Defrost duration.
min
0...99
d7 Evaporator dripping time after defrost.
min
0...15
d15 Compressor ON consecutive time before hot gas defrost.
min
0...99
Pb3
ON
OFF
d2
ON
OFF
d3
d7
d15
Defrost
request
End of
defrost
Fig. 24.
Defrost with cycle reversed - End of defrost due to temperature
