Viessmann VITOPEND 200 Installation And Service Instructions Manual page 27

Further details regarding the individual steps
6. Test the nozzle pressure at the
upper rated output. In case of
deviations from the value
shown in the following table,
adjust the nozzle pressure for the
upper rated output, using screw
C (SW 10).
7. Press d.
Operation with the upper rated
output is terminated.
Note
The values in the nozzle pressure table apply to the following ambient con-
ditions:
&
Air pressure: 1013.25 mbar
&
Temperature: 15 °C
Nozzle pressure table
Rated output
Nozzle pressure
Gas Wobbe index
Natural 14.1 kWh/m
gas E
50.7 MJ/m
Natural 12.4 kWh/m
gas LL
*1
Only for DHW heating
Initial start-up, inspection, maintenance
8. Select the lower rated output.
9. Test the nozzle pressure at the
Supply pres- Nozzle
7 in
sure in mbar
mm
3
20 1.25
3
3
20 1.40
(cont.)
Constant temperature control
unit:
K + d press simultaneously:
"1" is shown on the dis-
play
Weather–compensated control
unit:
K + d press simultaneously:
"Relay test" and then
"Base load" is shown on
the display
lower rated output. In case of
deviations from the value
shown in the following table,
adjust the nozzle pressure for the
lower rated output using cross‐
head screw D. Counter the tor-
que applied by holding screw C
(SW 10).
kW 10.5
mbar 2.0 10.2
mbar 2.0 10.2
24
29 * 1
15.1
14.7
27