Reducing The Maximum Heating Output - Viessmann VITODENS 100-W Installation And Service Instructions Manual

Further details regarding the individual steps
9. Open the gas shut-off valve and start
the appliance.
Danger
Gas escaping from the test
connector leads to a risk of
explosion.
Check gas tightness at test
connector A.
Supply pressure (flow pressure)
For natural gas
below 17.4 mbar
(1.74 kPa)
17.4 to 25 mbar
(1.74 to 2.5 kPa)
above 25 mbar
(2.5 kPa)

Reducing the maximum heating output

The maximum heating output can be
reduced according to system require-
ments.
For LPG
below 25 mbar
(2.5 kPa)
25 to 47 mbar
(2.5 to 4.7 kPa)
above 47 mbar
(4.7 kPa)
Commissioning, inspection, maintenance
(cont.)
Note
The maximum pressure drop
between the gas shut-off valve and
test connector A at the gas train is
0.5 mbar (50 Pa).
Measures
Do not start the boiler. Notify your gas
supply utility or LPG supplier.
Start the boiler.
Install a separate gas pressure governor
upstream of the system and regulate the
flow pressure to 20 mbar (2.0 kPa) for
natural gas or 37 mbar (3.7 kPa) for LPG.
Notify your gas supply utility or LPG sup-
plier.
1. Switch ON the ON/OFF switch.
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