Setting The Maximum Output - Viessmann VITODENS 222-F Installation And Service Instructions Manual

Further details regarding the individual steps
Supply (flow) pres- Supply (flow)
sure for natural pressure for LPG
gas
below 15 mbar below 25 mbar
15 to 25 mbar 25 to 45 mbar
above 25 mbar above 45 mbar

Setting the maximum output

You can limit the maximum output for heating operation. The limit is set via the
modulation range. The max. adjustable heating output is limited upwards by the boiler
coding card.
Weather-compensated control unit:
1. Press OK and å simultaneously
for approx. 4 s.
2. "Service functions"
3. "Max. output"
4. "Change?" Select "Yes".
A value flashes on the display (e.g.
"85"). In the delivered condition, this
value represents 100 % of rated out-
put.
5. Select required value.
Commissioning, inspection, maintenance
(cont.)
Measures
Do not start the boiler. Notify your mains
gas or LPG supplier.
Start the boiler.
Install a separate gas pressure governor
upstream of the system and regulate the
pre-charge pressure to 20 mbar for natu-
ral gas or 37 mbar for LPG. Notify your
mains gas or LPG supplier.
Constant temperature control unit:
1. Press OK and å simultaneously
for approx. 4 s.
2. Select Ú "3" and confirm with OK.
A value flashes on the display (e.g.
"85") and "A" appears. In the deliv-
ered condition, this value represents
100 % of rated output.
3. Select required value and confirm
with OK.
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