Immergas VICTRIX HYBRID PLUS Manual page 86

During the coolant recovery operation with the Pump Down, stop the compressor before removing the coolant piping.
If the compressor is still operating and the stop valve is open during coolant recovery with the Pump Down, air will be sucked into the
system.
Due to the abnormal pressure in the coolant cycle, the compressor may brake and the unit may be damaged.
The coolant recovery operation with the Pump Down extracts all the coolant from the hydronic unit and sends it to the compressor mod-
ule.
1. Remove the cover of the liquid stop valve and the gas stop valve.
2. From the control panel, set the stand-by mode (
3. After ±2 minutes, close the liquid stop valve with a hex key.
4. Check that a vacuum was achieved on the pressure gauge.
5. After ±5 minutes, close the gas shut-off valve and stop the Pump Down from the "Service" -> "Manual" -> "Pump down" -> "Off" menu.
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) and then access the "Service" -> "Manual" -> "Pump down" -> "On" menu.