Preparing Boilers For Cascade Mode - Viessmann VITOTRONIC 200 Installation And Service Instructions Manual

Vitotronic 200 and 300-K Installation and Service

Preparing Boilers for Cascade Mode

IMPORTANT
The following procedure must be done on each boiler
connected to the Vitotronic 300-K.
Removing the front enclosure panel
1. Remove the external accessories connection box
cover.
2. Loosen the screws at the bottom of the boiler
(do not remove completely).
3. Remove the front encloser panel (lift up and pull
away from the boiler).
Opening the control unit cover
For installation, commissioning, maintenance
and service of Vitodens 200-W with Vitotronic
200: see separate installation instructions and
service instructions.
If a DHW tank is to be integrated into the
system, make the connection at the Vitotronic
300-K.
1. Slide both sides of the programming unit cover closed.
2. Release the hinged hooks located on both sides of
the control unit.
3. To open hinged cover, lift cover and then fold down
the control unit.
4. Release locking tabs as shown.
5. Remove cover.
Installation Sequence
7