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CTC GSi 600
7.2.4
Brine
The brine circulates in a closed system. The fluid consists of water and
antifreeze solution. Sentinel R500 & R500C are recommended for use in the
brine circuit. The glycol is mixed at a concentration of slightly less than 30%,
which is equivalent to fire risk class 2b and a freezing point of around –15°C.
It is a CTC recommendation that around 1 litre of brine/glycol is required per
metre of collector hose, i.e. around 0.3 litres of antifreeze solution will be
needed per metre of hose, for an (external) hose diameter of 40 mm.
7.2.5
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.
7.2.6
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.
!
Check the dirt filter
after bleeding has
been completed.
!
The fluid must be
thoroughly mixed
before the heat pump
is started.
!
Check the dirt filter in
the brine system after
a few days’ operation.
Summary of Contents for GSi 600 Series
Page 33: ...33 CTC GSi 600 B15 B12 B11 B2 G2 G2 Y2 6 1 17 Schematic diagram passive cooling alt 3 ...
Page 64: ...8 22 HP cooling module schematic diagram 3x400V A5 ...
Page 65: ...8 23 HP cooling module schematic diagram 1x230V 3x230V A5 ...
Page 67: ...M GF B25 B26 Y21 B5 G20 B24 B23 B27 B28 G11 G5 B102 B18 ...
Page 131: ...131 CTC GSi 600 ...
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