Viessmann B2TF Installation And Service Instructions Manual page 58

Commissioning, inspection, maintenance
Calling up and resetting the maintenance display
5. "System configuration"
6. "Boiler"
Fitting the front panel
Fig. 48
Instructing the system user
The system installer should hand the operating instruc-
tions to the system user and explain to the user how to
operate 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.
58
2.
1.
(cont.)
7. Select parameter 1411.0 "Clear maintenance
messages" and "ON".
Note
The selected service parameters for hours run and
time intervals restart at 0.
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.