Gebwell GEMINI 40, Installation, Operation And Maintenance Manual

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7 PIPE INSTALLATION
7.1 Collector
When viewing from the front, the heat pump’s collector pipes
are at the right edge of the device.
NOTE! In GEMINI devices the source pump must be installed
externally. The pump is delivered in conjunction with the equip-
ment delivery. It is recommended that the pump is installed ver-
tically to the line from the ground. In this way, air does not ac-
cumulate inside the pump. External source pump is controlled
by leading heat pump’s controller.

In the collector/brine, only use connection parts that
are intended for cold conditions.

Install shut-off valves in the pipe connections as
close as possible to the heat pump.

A dirt separator (filter) must be installed to the
collector’s line coming from the ground in
accordance with connection diagrams.

Use supports insulated with rubber to support the
pipes.

Ensure that water does not spill on the pump or in the
electrical devices during operation.

The collector must be pressure tested at a pressure of
3bar and the test pressure must be maintained for at
least 30 min.

Insulate all of the building’s source/brine pipes with
closed-cell insulation in order to prevent water con-
densation.

Rinse the pipes of any installation debris prior to
installing the heat pump
When measuring the collection circuit, the geographical loca-
tion, soil type, heat pump’s efficiency and the property’s heating
needs must be taken into consideration.
When 40x4.2 PN6.3 PEM hoses are used
Device Recommended
length of collec-
tion piping (m) Recommended
active
drilling
depth (m)
GEMINI 40kW 4x500 – 6x500 4x170 – 5x200
GEMINI 52kW 5x500 – 8x500 5x170 – 7x200
GEMINI 64kW 6x500 – 10x500 6x170 – 9x200
The table values are examples intended to be guidelines. Before
beginning installation, accurate calculations of the building’s
heat requirements must be prepared.
The maximum length for a single collector loop is 500 m. If there
is a need to install more piping, the piping must be divided into
two loops that are connected in parallel. The connection must be
conducted so that the loop flow can be balanced.
The collection piping must rise constantly towards the heat pump
in order to prevent air pockets. If this is not possible, venting
mechanisms must be installed at the high points.
UTILITY
ROOM