5 Assembly and installation
18
Installation instructions aroTHERM 0020147164_07
5.4.2
Standard tariff
5.4.2.1 230 V connection
X4
X9
EBUS
X7
FLOOR H
X2
21
2
1
1
Mains connection ter-
minal in the product
2
Partition
Caution.
Risk of material damage due to high con-
nected voltage.
At mains voltages greater than 253 V, elec-
tronic components may be damaged.
▶
Ensure that the rated voltage of the mains
is 230 V (+10%/-15%) ~ 50 Hz.
▶
Connect the mains connection cable to the product's
power supply connection.
▶
Install a separate residual-current circuit breaker in the
heat pump. Use a special residual-current circuit breaker
that is suitable for smooth DC residual currents and for
high-frequency harmonics.
▶
Guide the mains connection cable through the product's
cable duct (PEG screwed connection).
5.4.3
Laying the 24 V cabling
PE N L
230 V~
+ -
Bus
VF1
SP1
PE N L
230 V~
PE N L
MA1
PE N L
MA2
PE N Auf Zu
UV1
PE N 1 2
ZH
2 1
2 1
X4
X9
EBUS
X7
FLOOR H
3
1
2
1
eBUS connection in the
heat pump (observe the
polarity)
2
Limit thermostat con-
nection (underfloor pro-
tective circuit)
3
eBUS connection in
the VWZ AI heat pump
control module or in the
hydraulic station
1.
Feed the cable through the cable duct.
VWL 55/2 A 230 V
VWL 85/2 A 230 V
VWL 115/2 A 230 V
VWL 155/2 A 230 V
Recommended eBUS cable dimen-
sion
2 x 0.75 mm
²
Recommended cable dimension for
eBUS + limit thermostat
4 x 0.75 mm
²
2.
Connect the eBUS cable to the system controller.
3.
If you install a limit thermostat (e.g. 50 °C) in the heat-
ing circuit flow, remove the bridge from terminal
(2)
and
connect the limit thermostat to this terminal.
5.4.4
Installing the cable duct
Caution.
Risk of malfunction due to incorrect rout-
ing of the supply lines.
If you route the supply lines for the power
supply and the eBUS line through the same
cable duct, the signal will be disrupted.
▶
Route the supply lines for the power sup-
ply and the eBUS line through various
cable ducts in the product.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
2
3
4
ØA
ØA
1
2
1
eBUS line and limit
thermostat line cable
duct
2
Power supply cable
duct
1.
Measure the diameter of the cable.
2.
Drill a hole the same size as the cable diameter in the
cable duct.
3.
Route the cable through the cable duct.
4.
Tighten the cable duct with two open-end spanners.
