Setting The Maximum Output - Viessmann VITODENS 333-F WS3A Service Instructions Manual

Commissioning, inspection, maintenance
Further details regarding the individual steps
Supply (flow) Supply (flow)
pressure for nat- pressure for
ural gas LPG
below 17.4 mbar below 42.5 mbar
17.4 to 25 mbar 25 to 57.5 mbar
above 25 mbar above 57.5 mbar

Setting the maximum output

Note
You can limit the maximum output for heating operation. The limit is set via the
modulation range.
1. Start the boiler.
2. K + F press simultaneously:
"100" flashes (equals
100% of rated output)
and "A" is displayed.
On weather-compen-
sated control units, the
display additionally
shows "Max.heating
output".
a/b press for the required
value in % of rated output
as max. output.
d to confirm.
16
(cont.)
Measures
Do not start the boiler. Notify your
mains gas or LPG supplier.
Start the boiler.
Install a separate gas pressure gover-
nor upstream of the system and regu-
late the inlet pressure to 20 mbar for
natural gas or 50 mbar for LPG. Notify
your mains gas or LPG supplier.
3. Record the setting for the maxi-
mum output on the additional type
plate supplied with the "technical
documentation". Affix the type
plate next to the type plate on top
of the boiler.