Checking The Gas Type - Viessmann VITODENS 343-F WS4A Installation And Service Instructions Manual

Commissioning, inspection, maintenance
Further details regarding the individual steps
3. c press this button again,
"Außentemperatur" (outside
temperature) is displayed.

Checking the gas type

The Vitodens is equipped with an electronic combustion control unit that adjusts
the burner for optimum combustion in accordance with the prevailing gas qual-
ity.
Consequently, for natural gas there is no adjustment required across the
entire Wobbe range.
The compact boiler can be operated in the Wobbe index range 10.0 to
3
16.1 kWh/m (36.0 to 58.0 MJ/m
Convert the burner for operation with LPG (see "Gas type conversion" on
page 31).
1. Determine the gas type and Wobbe
index by asking your local gas sup-
ply utility or LPG supplier.
30
4. b for the required language.
5. d to confirm.
3
).
2. Convert the burner for operation
with LPG (see page 30).
3. Record the gas type in the service
report on page 143.
(cont.)