Matching The Control Unit To The Heating System - Viessmann VITODENS 343-F WS4A Installation And Service Instructions Manual

Commissioning, inspection, maintenance
Further details regarding the individual steps
Delivered condition:
The compact boiler heats the total
cylinder volume (approx. 250 l).
Valve position: A - AB
Optional change:
The compact boiler heats only the
upper cylinder volume (approx. 80 l).
Valve position: B - AB

Matching the control unit to the heating system

Note
Subject to the equipment level, the control unit must be matched to the system.
Various system components are recognised automatically by the control unit
and the relevant codes are adjusted automatically.
For the selection of an appropriate design, see the following diagrams.
For coding steps, see page 66.
System version 1
One heating circuit without mixer A1
48
(cont.)