STIEBEL ELTRON WPM 3

30 | WPM 3 www.stiebel-eltron.com
INSTALLATION
Installation
10.4 Electrical connection
10.4.1 General
DANGER Electrocution
Carry out all electrical connection and installation work
in accordance with national and regional regulations.
DANGER Electrocution
Only use a permanent connection to the power supply.
Ensure the appliance can be separated from the power
supply by an isolator that disconnects all poles with at
least 3 mm contact separation. This requirement can be
met with contactors, circuit breakers, fuses/MCBs, etc.
Note
The specified voltage must match the mains voltage. Ob-
serve the type plate.
 When connecting the power, observe the relevant electrical
connection diagram.
The supply voltage at terminal L and the phase L' – switched by
the power supply utility – must be routed via the same residual
current device, as they share a neutral conductor in the WPM3.
 Ensure that L and L' are in phase.
 Disconnect all heating system poles from the mains power
supply before installation.
No fuses/MCBs for connected consumers are provided in the
WPM3 or in the wall mounting enclosure. A fuse/MCB for con-
nected consumers may be connected in series via terminal L* or
pumps L (see also heat pump connection diagram).
Circulation pumps and mixers
 When making these connections, observe the maximum relay
capacity (2 A/250 V AC) and the maximum controller capacity
(10 A/250 V AC).
The DHW circulation pump relay output can be used for various
purposes, subject to the parameter settings.
!
Material losses
 Only connect energy efficient circulation pumps ap-
proved by us.
If energy efficient circulation pumps are used that have
not been approved by us, use an external relay with a
breaking capacity of at least 10A/250VAC or our WPM-
RBS relay set.
The following energy efficient circulation pumps have been ap-
proved by us for direct connection to the heat pump manager:
Part no.:
UP 25/7.0 E 232942
UP 25/7.5 E 232943
UP 25/7.5 PCV 235949
UP 30/7.5 E 233947
WPKI-HK E 233602
WPKI-HKM E 233603
10.4.2 Electrical connection WPMW 3
The cable entries in the wall mounting enclosure are suitable for
rigid and flexible cables with an outside diameter of between
6mm and 12mm.
!
Material losses
The BUS cables, power cables and sensor leads must be
installed separately.
Mains and low voltage power are routed separately in the wall
mounting enclosure.
 Route the low voltage leads into the left and right of the wall
mounting enclosure from below.
 Route the power cables into the inlet ducts above the junc-
tion box.
 When connecting the power supply, ensure the earth con-
ductor is correctly connected. Secure all cables to the wall
immediately below the wall mounting enclosure using cor-
rect strain relief fittings. The red wedges supplied are de-
signed to secure the cables inside the enclosure.
 Check the function of the strain relief fittings.
Connecting BUS cables
 Install a J-Y (St) 2 x 2 x 0.8mm² cable as the BUS cable to the
heat pump.
A3
A2
11 1213 14
H L - +
A1
X2
4321
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A1 WPMW 3
A2 Programming unit
A3 Heat pump