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LWZ 170 E PLUS / LWZ 370 PLUS |
13
INSTALLATION
Installation
10.4 Power supply
WARNING Electrocution
Carry out all electrical connection and installation work
in accordance with national and regional regulations.
WARNING Electrocution
Before connecting the appliance to the mains power sup-
ply, isolate all power cables. Isolation from the mains
power supply must be carried out with a contact sep-
aration of at least 3 mm, e.g. by means of omnipolar
isolators.
The appliance can be connected at a socket using the plug fitted
to the appliance.
Take the power consumption of the preheater coil into consid-
eration.
10.4.1 Terminal X1
Connection for eBUS or OpenTherm plug-in connection
The appliance can operate with both an OpenTherm and an eBUS
protocol. Provide the accessories required for this on site.
Subject to the setting of parameter 08 in the settings menu, you
can choose between eBUS and OpenTherm.
X1
26
�0
4�
15
�0
01
9
To connect an eBUS or OpenTherm connection, there is a 2-pole
X1 connection on the back of the display cover.
The eBUS protocol can, for example, be used to link appliances
(cascade control). In the context of sensitivity to polarity, always
connect contacts X1-1 and X1-1, and contacts X1-2 and X1-2. If the
contacts are interchanged, the appliance will not work.
With the OpenTherm protocol, swapping over the cable connection
at the 2-pole screw connection X1 does not affect the functioning
of the appliance.
The eBUS connection is set as default in parameter 08.
The X1 connection is only suitable for low voltage.
10.4.2 X2 connection
Connecting a stage switch
Note
Route the stage switch cable and power cable for the
ventilation unit separately.
X2
26
�0
4�
15
�0
01
9
Connect the stage switch (not part of standard delivery) to the
modular plug-in connection, type RJ12 (X2 connection). The X2
connection is on the back of the appliance's display cover.
Depending on which stage switch is connected, connect a type
RJ11 or RJ12 plug.
- When using a 4-stage switch with filter status indicator,
connect an RJ12 plug in conjunction with a 6-wire modular
cable.
- When using a 3-stage switch without filter status indicator,
connect an RJ11 plug in conjunction with a 4-wire modular
cable.
A combination of stage switches is also possible. The X2 connec-
tion is only suitable for low voltage.
10.4.3 Connection X14
X14
26
�0
4�
15
�000
3
The X14 connection is used to connect an external reheater coil.
The 2-pole X14 connection can be accessed once you have re-
moved the display cover. The display cover has a second union nut.
This union nut enables any connected 230 V cable, which can be
connected at X14, to be routed out of the appliance.
The X14 connection is disabled as default.
f
f
If you connect a reheater coil, adjust parameter 13 in the set-
tings menu.
The max. permissible connected load is 1000 W.
f
f
If you connect a reheater coil, also connect the temperature
sensor for the reheater coil across X15-7 and X15-8.
f
f
Secure the power cable that is routed to the reheater coil
using the strain relief below the display cover.
