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Installation of accessories
When using a DHW cylinder (circuit flow cylinder) in the heating system,
an automatic air vent valve must be mounted on the cylinder. This also
applies to twin wall cylinders.
When using a circuit flow cylinder in the heating system, an automatic air
vent valve must be installed at the inlet to the cylinder with a micro-
bubble separator.
9.5
DHW cylinder temperature sensor TW1
When a DHW cylinder is connected and TW1 is connected to the system,
this is automatically actuated upon starting.
▶ Connect the hot water temperature sensor TW1 on the installation
module in the control device to terminal TW1.
9.6
Diverter valve VW1
System solutions with a domestic hot water cylinder require a diverter
valve (VW1). Connect the diverter valve VW1 on the installation module
in the indoor unit to terminal VW1.
Fig. 19
[A]
To the domestic hot water cylinder
[B]
To the heating system (or buffer cylinder)
[AB] From the indoor unit
Fig. 20 Contact closed, connection A open
During domestic hot water heating, the contact is closed and connection
A is open.
20
Fig. 21 Contact open, connection B open
In heating mode, the contact is opened and connection B is open.
If the 3-way diverter valve has a Molex plug, only terminals 2, 3 and 6 are
assigned.
Make the following connections on the installation module:
▶ N – Connection to terminal N, VW1 on the installation module
▶ Y– Connection to terminal 53, VW1 on the installation module
▶ L – Connection to terminal 54, VW1 on the installation module
001002031-002
Fig. 22 Molex plug
If the 3-way diverter valve has a cabled connection, make the following
connections on the installation module:
▶ N – Connection to terminal N, VW1 on the installation module
▶ Y– Connection to terminal 53, VW1 on the installation module
▶ L – Connection to terminal 54, VW1 on the installation module
Fig. 23 Cabled connection
9.7
A domestic hot water cylinder for solar thermal heating is available as an
accessory. Installation and handling instructions are supplied with the
domestic hot water cylinder.
N
Y
L
Black
Blue
Brown
Domestic hot water cylinder, solar thermal heating
2
6
3
Y
N
L
0010041016-001
AWE – 6721835317 (2021/09)
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