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Connecting the collector to the heat pump
The sketch shows the connection of a collector with two parallel coils. Both coils are connected to
two distributors. Each coil should have a gate valve and a control valve. The control valve is ad-
justed so that the flow rate is the same in both coils.
The common pipe to the heat pump is fitted with a filling unit, a particle filter and an expansion
vessel. A safety valve is fitted to the outgoing pipe. When filling the heat transfer fluid circuit, one coil
at a time is filled by using these valves.
Heat pump
Filling unit
Safety
valve
Distributor
Filter
Ground, lake
or rock
collector
Ground water system
Application:
Systems using ground water are equipped with an intermediate heat exchanger to eliminate the risk
of freezing. A pump with a non-return valve is placed in the bore hole that via a hose pumps the
water to the intermediate exchanger and then back to an injection well. The circuit to the heat pump
is installed in the normal way with a filling unit and safety valve. The circuit should contain around
30% by volume antifreeze which corresponds to around -15°C.
Exp
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