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4
Electrical connection
ATTENTION!
The devices must always be disconnected from the power supply before
electrical work is carried out.
ATTENTION!
Electrical wiring must only be carried out by authorised persons. The
applicable regulations must be observed.
Fig. 4.2:
Circuit diagram – ACU module
EN-6
Fig. 4.1:Circuit diagram of four-way valve
Terminal diagram:
CW bn
If possible, the reversing valve should be installed in the immedi-
ate vicinity of the heat pump manager. The 4-core electrical sup-
ply cable (2xL/N/PE) to the actuator should not exceed a maxi-
mum length of 40 m, with a single-core cross-section of at least
²
1 mm
.
The external 4-way valve (Y12) must be connected to digital out-
puts N17.2-J6/NO2 and N17.2-J6/NC2. The outputs can be
found in the ACU module see Fig. 4.2: / (Active cooling function).
452163.66.60 · FD 9801
VWU
Heat pump manager (HPM)
CCW bk
< = >
< = >
N bu
< = >
VWU 32E - VWU 50E
N17.2 / J6-N02
N17.2 / J6-NC2
X2 / N
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