Operating instructions

Settings
24
Boiler sequence selection control Vitocontrol-S, VD2/CT3/CM2
Actual boiler sequence
The digits shown in the basic display show the boiler numbers of the connected
boilers in the current actual boiler sequence.
The hyphens between the boiler numbers indicate the status of each boiler.
The boilers in front of the first hyphen are those which are activated by the
Vitocontrol-S, VD2/CT3/CM2.
The boilers between the two hyphens are available for central heating
purposes, but are not currently required.
The boilers which are blocked (i.e. which are not available to the Vitocontrol-S,
VD2/CT3/CM2 for generating heat, e.g. due to a fault) appear after the second
hyphen.
Alternative, operator-requested boiler sequence
The boiler sequence criteria (e.g. fixed lead boiler, last boiler) are set on the
Vitocontrol-S, VD2/CT3/CM2 by your heating contractor during start-up of the
heating system. Using the boiler sequence on the basis of all criteria, it is possible
that
no alternative boiler sequence is available.
1. Open the hinged cover on the
programming unit.
2. / Press / ; for approx. 2
seconds; the alternative,
operator-requested boiler
sequence (shown without
hyphens) appears in the
display window.
3. / Press / until the
required boiler sequence
appears.
4. Press to confirm;
the display changes and
shows the actual boiler
sequence.
5. Close the hinged cover on the
programming unit.
Please note:
The operator-requested boiler
sequence does not have to
correspond to the actual boiler
sequence. The actual boiler
sequence is dependent on various
factors (e.g. faults) and the
settings made by your heating
contractor (e.g. temperature-
dependent blocking).
5351 341 v1.2
Boiler sequence
1-23-4
Boiler sequence
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