CTC Union EcoPart 425-435, Installation And Maintenance Manual

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CTC EcoPart i425-i435 Pro
General Information
Air pockets
To avoid air pockets, make sure that the collector hoses constantly rise
towards the heat pump. If this is not possible, it must be possible to bleed
the system at the high points. The filling pump usually manages smaller local
height discrepancies.
Checking brine difference
When the heat pump is running, regularly check that the temperature
difference between incoming and outgoing brine temperatures is not too
large. If there is a large difference, one of the causes may be due to air in
the system or a blocked filter. If this is the case, the heat pump triggers the
alarm.
The alarm factory setting is 7°C, but 9°C is permitted for the first 72 hours
while the compressor is running, as microbubbles in the system can reduce
brine flow.