(C) IDM ENERGIESYSTEME GMBH
Installation instructions iPump A 2-7, 3-11
41
Connection of the refrigerant circuit
Inbetri
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7. Connection of the refrigerant circuit
7.1. Connection lines of the refrigerant cir -
cuit
The outdoor unit is connected to the refrigerant circuit
of the indoor unit via two steam di
ff
usion-sealed in-
sulated copper pipes of air-conditioning pipe quality.
The maximum length of the pipes are 20 m in one
direction.
To avoid buckles in the refrigerant pipes, the mi-
nimum bend radius must be observed. To prevent
embrittlement or fractures, a pipe location must never
be bent twice. The bend radius should not be less
than 100 - 150 mm.
Dimension of the refrigerant pipes
iPump A 2-7:
Liquid line: 3/8“ (Ø 9.53 x 0.8 mm)
Hot gas line: 1/2“ (Ø 12.7 x 0.8 mm)
iPump A 3-11:
Liquid line: Ø 12.0 x 1 mm
Hot gas line: Ø 16.0 x 1 mm
The connection pipes between indoor
unit and outdoor unit are not included
in the delivery. They are available as an
accessory and can be ordered by the
iDM-dealer.
7.2. Connection of the outdoor unit on refri-
gerant side
The refrigerant pipes are factory-
fi
tted with protective
caps. Before soldering the refrigerant connection
lines, check that the two shut-o
ff
valves are fully
closed. For connecting the refrigerant lines, the pro-
tective caps must be cut with a pipe cutter.
The soldered connections must be made according
to the requirements of the cooling technology by a
trained refrigeration engineer licensed by iDM-Ener-
giesysteme GmbH.
The refrigerant connection pipes must be cut to the
required length using a pipe cutter, and the inner and
outer burrs must be removed with a special deburrer.
The soldering must be performed under protective
gas (nitrogen N2).
On the refrigerant side the indoor unit and the outdoor unit of iPump A heat pumps
are „hermetically tight“.
Open refrigerant pipes must be protected against moisture and dirth with caps or tapes.
Refrigerant pipes may not be buckled or crushed!
