Viessmann Vitopend 100-W Installation And Service Instructions Manual page 19

Further details regarding the individual steps
08. Setting the lower heating output:
Note
Adjust the upper rated heating out-
put before selecting the lower rated
heating output. The operation with
the lower rated heating output is
automatically cancelled after
approx. 30 min or by switching the
power OFF and ON again.
4
3
2
1
Turn the rotary selector "tw" anti-
clockwise as far as it will go.
"Serv" appears.
09. Test the nozzle pressure at the
lower rated heating output. In case
of deviations from the value shown
in the following table, adjust the noz-
zle pressure for the lower rated
heating output using cross-head
screw D. Counterhold screw C
(SW 10).
10.5 to 24 kW
Rated heating output
Nozzle pressure based on
a supply pressure of
20 mbar
Gas Nozzle ø
in mm
Natural gas H
Commissioning, inspection, maintenance
10. Fit cap B.
11. Check the setting values and record
12. Switch OFF the ON/OFF switch at
5
13. Turn the rotary selectors "tw" and
6
14. Open the gas shut-off valve and
kW 10.5
1.25 mbar 2.6
(cont.)
them in the "Reports" table.
the control unit (the boiler shuts
down), close the gas shut-off valve,
remove the pressure gauge and
close test nipple A with the
screw.
"tr" back to their original posi-
tions.
start the appliance.
Danger
Gas escaping from the test
nipple leads to a risk of
explosion.
Check the test nipple for gas
tightness.
11 12 15
2.9 3.4 5.3
18 21 24
7.6 10.3 13.5
19