Instructing The System User - Viessmann VITODENS 222-F Installation And Service Instructions Manual

Commissioning, inspection, maintenance
Calling up and resetting the service display
Service reset (after service has been carried out)
1. and OK – press simultaneously for approx. 4 s,
then release.
Fitting the front panel
Fig. 46

Instructing the system user

The system installer should hand the operating instruc-
tions to the system user and instruct the user in oper-
ating the system.
DHW hygiene
For optimum DHW hygiene, avoid DHW temperatures
that are < 50 °C. For larger systems and systems with
low water exchange, the temperature should not drop
below < 60 °C.
Hygiene function
The DHW can be heated to a specified (higher) set
DHW temperature for a period of one hour.
54
2.
1.
(cont.)
2. Use / to select "Reset service messages".
3. OK
To activate the function, see the operating instructions.
Inform the system user what DHW temperatures
should be set and the risks associated with having a
raised outlet temperature at the draw-off points.