Viessmann VITODENS 111-W Installation And Service Instructions Manual page 42

Commissioning, inspection, maintenance
Further details regarding the individual steps
C Min. speed
Changing the maximum speed
Only when operating with an outside
temperature sensor.
r r
42
r
1. Switch ON the ON/OFF switch.
2. Turn both rotary selectors "tw" and
"tr" simultaneously to their central
positions.
The display shows "SERV".
3. Within 2 s, turn rotary selector "tr"
to the top right range.
"r" appears on the display and the
set value in % of maximum speed
flashes.
4. Change the maximum speed with
rotary selector "tw".
5. The change has been programmed
when the value stops flashing. The
control unit returns to standard
mode.
6. Reset both rotary connectors to their
required set values.
(cont.)