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Brine side
COLLECTOR
Caution
The length of the collector hose varies depending
on the rock/soil conditions, climate zone and on
the climate system (radiators or underfloor heat-
ing) and the building's power requirement. Each
installation must be sized individually. The brine
pump's capacity must be taken into consideration
when sizing the collector.
In those cases where it is necessary to have several collect-
ors, these should be connected in parallel with the possibility
for adjusting the flow of the relevant coil.
For surface soil heat, the hose should be buried at a depth
determined by local conditions and the distance between
the hoses should be at least 1 metre.
For several bore holes, the distance between the holes must
be determined according to local conditions.
Ensure the collector hose rises constantly towards the heat
pump to avoid air pockets. If this is not possible, airvents
should be used.
Because the temperature of the brine system can fall below
0 °C, it must be protected against freezing down to -15 °C.
When making the volume calculation, use 1 litres of ready
mixed brine per metre of collector hose (applies when using
PEM-hose 40x2.4 PN 6.3) as a guide value.
SIDE CONNECTION
It is possible to angle the brine connections, for connection
to the side instead of top connection.
To angle out a connection:
1.
Disconnect the pipe at the top connection.
2.
Angle the pipe in the desired direction.
3. If necessary, cut the pipe to the desired length.
14
Chapter 4 | Pipe connections
CONNECTING THE BRINE SIDE
Insulate all indoor brine pipes against condensation.
Mark the brine system with the antifreeze that is used.
Install as follows:
•
enclosed level vessel (CM2)/expansion vessel
The level vessel must be installed as the highest point in
the brine system on the incoming pipe before the brine
pump (Alternative 1). If the level vessel cannot be placed
at the highest point, an expansion vessel must be used
(Alternative 2).
NOTE
Note that condensation may drip from the level
vessel. Position the vessel so that this does not
harm other equipment.
•
enclosed safety valve (FL3)
Install the safety valve under the level vessel as illustrated.
•
pressure gauge
The pressure gauge is only required if an expansion vessel
is used.
•
shut-off valve
Install the shut-off valve as close to S1256PC as possible.
•
enclosed filterball (QZ2)
Install the filterball as close to S1256PC as possible.
TIP
If filling connection KB25/KB32 is used, the en-
closed filterball does not need to be fitted.
•
vent valve
When necessary you should install venting valves in the
brine system.
In the case of connection to an open groundwater system,
an intermediate frost-protected circuit must be provided,
because of the risk of dirt and freezing in the evaporator.
This requires an extra heat exchanger.
Alt. 1
Alt. 2
P
XL6
-QZ20
XL7
NIBE S1256PC
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