Viessmann VITODENS 111-W Installation And Service Instructions Manual page 25

Further details regarding the individual steps
r r
Commissioning, inspection, maintenance
(cont.)
2. Turn rotary selector "tr" fully clock-
wise, until the display shows
"SERV".
Within 2 s return the rotary selector to
the r.h. control range. The display
shows "A".
3. Select the required max. heating out-
put with rotary selector "tr".
Bars indicating the selected heating
output flash on the display.
A
■ Position 1 (1 bar) = lower heating
output.
■ Position 6 (5 bars) = upper heating
output.
4. Test selected heating output by
measuring the gas throughput.
°C
6 0
25