Connecting The Central Fault Message Facility; External Demand Via Switching Contact - Viessmann VITOTRONIC 200 Installation And Service Instructions Manual

Installation Sequence

Connecting the Central Fault Message Facility

External Demand via Switching Contact

Legend
A Floating contact
B Plug aVH of the control unit
Legend
A Floating contact
B Extension EA1
18
Vitotronic 200 and 300-K Installation and Service
Rated voltage
Rated current
Connection options:
Connection at plug aVH
Extension EA1 (accessory, see page 90)
Connection
Note: 'Live' contacts lead to short circuits or phase failure.
The external connection must be potential-free.
When the contact is closed, burner operation is load-
dependent. The supply water is heated to the value set
in the coding address "9B" in the "General" group on the
Vitotronic 300 -K.
The supply water temperature is limited by this set
value and the electronic supply temperature maximum
limit (coding address "06" in the "Boiler" group on the
Vitotronic 200).
Codes
Plug aVH No code required.
Extension EA1 Set "5D", "5E" or "5F" in the "General"
group to 2.
120V~
max. 2 A~