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

Commissioning, inspection, maintenance
Further details regarding the individual steps

Converting 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 switch to the correct gas type at
the control unit.

Checking the static and supply pressure

Danger
CO formation 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
Purge the LPG tank twice during com-
missioning or replacement. Vent the tank
and gas connection line thoroughly after
purging.
A
1. Close the gas shut-off valve.
30
(cont.)
Separate installation instruc-
tions.
Conversion from LPG to natural gas, see
page 68.
2. Release the screw inside test con-
nector A on the gas train but do not
remove, then connect the pressure
gauge.
3. Open the gas shut-off valve.
4. Check the static pressure.
Set value: max. 57.5 mbar
(5.75 kPa)
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 (2.0 kPa)
■ LPG: 37 mbar (3.7 kPa)
Note
Use a suitable tester with a resolution
of at least 0.1 mbar (10 Pa) to check
the supply pressure.
7. Proceed as indicated in the following
table.