Viessmann Vitopend 100-W Installation And Service Instructions Manual page 21

Further details regarding the individual steps
Turn the rotary selector "tr" anti-
clockwise as far as it will go.
03.
Release the screw inside test nipple
A, but do not remove, then connect
the pressure gauge.
04. Open the gas shut-off valve. Start
the boiler.
4
05. 3
2
1
Turn rotary selector "tw" clockwise
as far as it will go (leave at that posi-
tion briefly), then turn it back.
"Serv" appears.
5
6
Commissioning, inspection, maintenance
(cont.)
06.
Turn potentiometer B anti-clock-
wise with a screwdriver until the noz-
zle pressure at the pressure gauge
corresponds to the required heating
output in accordance with the nozzle
pressure table on page 19.
07. Close and flip up the control unit.
08. Switch OFF the ON/OFF switch on
the control unit, close the gas shut-
off valve, remove the pressure
gauge and close test nipple A.
09. Turn the rotary selectors "tw" and
"tr" back to their original posi-
tions.
10. Record the adjustment of the max.
heating output in the "Reports"
table.
21