Viessmann Vitopend 100-W Installation And Service Instructions For Contractors page 23

Further details regarding the individual steps
A Test connector
B Cap
C Screw
D Phillips screw
01. Turn off the ON/OFF switch on the
control unit (the boiler shuts down)
4
3
2
1
Turn rotary selector "tr" anti-
clockwise as far as it will go.
02. Close the gas shut-off valve.
03. Release the screw inside test con-
nector A but do not remove, then
connect the pressure gauge.
Commissioning, inspection, maintenance
04. Open the gas shut-off valve. Turn on
05. Set the upper heating output:
06. Remove cap B from the gas train.
07. Test the nozzle pressure at the
5
6
(cont.)
the system ON/OFF switch on the
control unit.
4
3
5
2
1 6
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.
upper rated heating output. In the
case of deviations from the value
shown in the following table, adjust
the nozzle pressure for the upper
rated heating output at screw C
(SW 10).
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