Viessmann Vitopend 100-W Installation And Service Instructions Manual page 18

Commissioning, inspection, maintenance
Further details regarding the individual steps
A Test nipple
B Cap
C Screw
D Phillips screw
01. Switch OFF the control unit ON/OFF
switch (the boiler shuts down).
3
2
1
Turn the rotary selector "tr" anti-
clockwise as far as it will go.
02. Close the gas shut-off valve.
03. Release the screw inside test nipple
A, but do not remove, then connect
the pressure gauge.
18
4
5
6
(cont.)
04. Open the gas shut-off valve. Switch
ON the system ON/OFF switch on
the control unit.
05. Select the upper heating output:
4
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.
Note
The operation with the upper rated
heating output is automatically reset
after approx. 30 min or by switching
the power OFF and ON again.
06. Remove cap B from the gas train.
07. Test the nozzle pressure at the
upper rated heating output. In case
of deviations from the value shown
in the following table, adjust screw
C (SW 10) for the upper rated heat-
ing output.
5
6