Viessmann Vitopend 100-W Installation And Service Instructions Manual page 45

Further details regarding the individual steps
05. Set max. heating output for DHW
heating
Ensure heat is being drawn off by
the heating system.
At a draw-off point, turn on the tap
completely for hot water and let the
hot water run.
Note
So that the boiler can regulate for
max. heating output for DHW heat-
ing, the actual DHW temperature
must be lower than the set DHW
temperature.
06. Undo cap B from the gas train.
07. Measure nozzle pressure at max.
heating output for DHW heating. In
the case of deviations from the
value shown in the following table,
adjust the nozzle pressure for the
max. heating output for DHW at
screw C (spanner size 10).
Commissioning, inspection, maintenance
(cont.)
08. Select the lower heating output:
1. Hold down MODE and
taneously for approx. 5 s.
■ "SEt" and
■ "PL:1" is shown on the addi-
tional display.
2. Press MODE.
"P01" is shown on the main dis-
play.
3. OK to confirm
4. Use to select "On".
5. OK to confirm
"LO" is shown in the additional
display.
The burner now operates at the
lower heating output.
09. Test the nozzle pressure at the
lower rated heating output. In the
case of deviations from the value
shown in the following table, adjust
the nozzle pressure for the lower
heating output using Phillips
screw D. Counterhold screw C
(spanner size 10).
10. Fit cap B.
simul-
flash.
°C
45