Unit installation

25
Plug aVD
Extension EA1
143
A
B
2 31
A
Floating contact
B Plug aVD on control unit
B
[{S
DE
[{D
DE
[{A
DE
A
A
Floating contact
B
Extension EA1
With the contact closed, the burners of all boilers will be subject to a controlled
shutdown. The boiler circuit pumps are switched off.
!
Please note
During the block, there is no frost
protection
of the heating system.
Codes
Plug aVD
Extension EA1
Set coding address "99" in the
"General" group.
Set "5d", "5E" or "5F" in the "General" group
to 3 or 4.
External "Mixer close"/"Mixer open"
Connection at plug aVD
Installation, Vitotronic 300-K
External blocking via switching contact
(cont.)
5601 090 GB
Installation