Changing To Operation With Lpg; Checking The Static And Supply Pressure - Viessmann VITODENS 111-W Installation And Service Instructions Manual

Further details regarding the individual steps

Changing to operation with LPG

In the delivered condition, the boiler is
set up for operation with natural gas. For
operation with LPG, change the gas noz-
zle and convert the gas type in the con-
trol unit.

Checking the static and supply pressure

Danger
CO build-up as a result of incor-
rect burner adjustment can have
serious health implications.
Carry out a CO test before and
after work on gas appliances.
Operation with LPG
Flush the LPG tank twice during com-
missioning or replacement. Purge the
tank and gas supply line thoroughly after
flushing.
A
1. Close the gas shut-off valve.
Commissioning, inspection, maintenance
(cont.)
Separate installation instruc-
tions.
Changing from LPG to natural gas - see
page 56.
2. Release screw inside test nipple A
on the gas train, but do not remove it;
then connect the pressure gauge.
3. Open the gas shut-off valve.
4. Check the static pressure.
Set value: max. 57.5 mbar
5. Start the boiler.
Note
During commissioning, the boiler can
enter a fault state because of airlocks
in the gas line. After approx. 5 s press
RESET to reset the burner.
6. Check the supply (flow) pressure.
Set value:
■ Natural gas: 20 mbar
■ LPG: 37 mbar
Note
Use a suitable measuring device with
a resolution of at least 0.1 mbar to
measure the supply pressure.
7. Take the action shown in the follow-
ing table.
25