Viessmann Vitodens 222-F B2TA Installation And Service Instructions Manual page 161

Control functions
Fill program
In the delivered condition, the diverter
valve is set to its central position, ena-
bling the system to be filled completely.
After the control unit has been switched
on, the diverter valve no longer goes into
its central position.
Afterwards, the diverter valve can be
moved via the fill function into the central
position (see "Filling the heating sys-
tem"). In this position, the control unit can
be switched off, and the system can be
filled completely.
Screed drying
When activating screed drying, observe
the information provided by the screed
manufacturer.
When the screed drying function is acti-
vated, the heating circuit pump in the
heating circuit with mixer is switched on
and the flow temperature is held in
accordance with the selected profile. On
completion (30 days), the heating circuit
with mixer is regulated automatically via
the set parameters.
Observe EN 1264. The report to be pro-
vided by the heating contractor must
contain the following heat-up details:
Temperature profile 1: (EN 1264-4) code "F1:1"
50
40
30
20
10
1 5
(cont.)
10 15 20
Filling with the control unit switched
on
If the system is to be filled with the control
unit switched on, the diverter valve is
moved in the fill program to its central
position and the pump starts.
When the function is enabled, the burner
shuts down. The program is automati-
cally disabled after 20 min.
■ Heat-up data with respective flow tem-
peratures
■ Max. flow temperature achieved
■ Operating state and outside tempera-
ture during handover
The various temperature profiles can be
set via coding address "F1" in the "Heat-
ing circuit" group.
The function continues after power fail-
ure or after the control unit has been
switched off. "Heating and DHW" is star-
ted when screed drying is finished or if
code "F1:0" is set manually.
25 30
Days
Function description
161