10
X3 Power
supply
HP
Heat pump (compressor)
L1, L2, L3, PE
X4 Control
terminals
Mains supply:
L, N, PE
Control input:
Ext. control STAND ALONE operation
X2 LV
terminal
1
BUS
High
H
2
BUS
Low
L
3
BUS
Ground
4 & 5
Temperature sensor
Phase monitoring relay
from the mains power supply by an additional
isolator, which disconnects all poles with
at least 3 mm contact separation. For this
purpose, use contactors, mains isolators,
fuses, etc. on site.
Terminals are located inside the WPF...M(S)
control panel (Fig. 11 and 13). The terminals
become accessible by removing the front
cover (Fig. 5). Remove the lid to enable the
equipment to be connected (Fig. 5).
The following are connected inside the control
panel:
– The power supply of the heat pump
controller IWS II
– The power supply of the compressor
– The BUS cable
Ensure that High, Low and Ground are
correctly connected.
– the enable signal for the stand alone ope-
ration at terminal X4/2. For this, remove the
jumper across terminals X4/1 and X4/2.
The
IWS II
(abbreviation for integrated heat
pump control) is a PCB fitted as standard
into the heat pump control panel. The IWS II
controls the contactors of the compressors and
the starting current limiter, receives the signal
inputs for high pressure, low pressure and
central faults and contains the BUS interface to
the WPM II.
Use appropriate cables in accordance with
local regulations for all connections.
Check the strain relief function.
BUS cable:
J-Y (St) 2x2x0.8
Observe the operating instructions for the heat
pump manager WPM II.
Connect the circulation pump for the heat
utilisation side in accordance with the design
documentation.
STAND ALONE operation
In emergencies, this heat pump can also
operate without the heat pump manager (see
page 15).
When fitting the front cover secure it, as
shown in Fig. 6, with the associated screws
and serrated washers (included in the pack
supplied).
Route all connecting cables and sensor leads
through the cableways in the back panel
(pos. 6, Fig. 7).
1.8 Modules
When using a modular approach, connect the
individual heat pumps via terminal BUS 1,
2, 3. Ensure that High, Low and Ground are
correctly connected at the WPM II as well as at
the heat pump.
Abb. 11
X2
X4
X3
PE
3/PE~400V 50Hz
1/N/PE~230V 50Hz
C26_03_01_0239
Wiring diagram WPF...M (Triplephase)
!
Only WPF...M (Triplphase)
The compressor can only turn in
one direction. Should the compressor fail to
start, interchange two phases to alter the
direction of rotation. You can check the
direction of rotation by means of a red
diode on the phase monitoring relay
(Fig. 11). The rotational direction is correct
if the red diode lights up.
