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

Further details regarding the individual steps
8. Selecting the lower output:
Note
Adjust the upper rated output
before selecting the lower rated
output. The operation with the
lower rated output is automati-
cally cancelled after approx.
30 min or by switching the power
OFF and ON again.
Turn rotary selector "tw" fully
anti-clockwise.
LEDs "tw" and "tr" flash alter-
nately.
9. Test the nozzle pressure at the
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. Hold screw C (SW 10)
to counter the torque applied.
10.5 to 24 kW
Rated output
Nozzle pressure based
on a supply pressure of
20 mbar
Gas Nozzle ø
in mm
Natural gas E
Natural gas L
S
Natural gas
LL/L
W
Commissioning, inspection, maintenance
10. Snap cap B into place.
11. Record the setting values in the
12. Switch OFF the system at the
13. Return both rotary selectors "tw"
14. Open the gas shut-off valve and
kW 10.5
1.25 mbar 3.0 3.2
1.8 mbar 1.5 1.6
1.4 mbar 2.8 3.0
(cont.)
service report on page 54.
control unit (the boiler shuts
down), close the gas shut-off
valve, remove the pressure gauge
and close test nipple A with the
screw.
and "tr" to their original posi-
tions.
start the boiler.
Danger
Gas escaping from the test
nipple leads to a risk of
explosion.
Check the test nipple for
soundness.
11 12 15 18
3.6 5.5 7.7 10.4
1.8 2.8 4.0
3.4 5.2 7.4
21 24
13.6
5.4 7.1
9.9 13.0
19