Viessmann Vitopend 100-W Installation And Service Instructions For Contractors page 26

Commissioning, inspection, maintenance
Further details regarding the individual steps
02. 3
2
1
Turn rotary selector "tr" anti-
clockwise as far as it will go.
03.
Release the screw inside test con-
nector 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.
26
4
5
6
5
6
(cont.)
06.
Turn potentiometer B anti-clock-
wise with a screwdriver until the noz-
zle pressure indicated by the pres-
sure gauge corresponds to the
required heating output in accord-
ance with the nozzle pressure table
on page 24.
07. Close and pivot up the control unit.
08. Turn off the ON/OFF switch on the
control unit. Close the gas shut-off
valve, remove the pressure gauge
and close test connector A.
09. Turn rotary selectors "tw" and
"tr" back to their original posi-
tions.
10. Record the adjustment of the max.
heating output in the "Reports"
table.