Selecting The Language (If Required) Only For Weather-Compensated Control Units; Checking The Gas Type - Viessmann VITODENS 200-W Service Instructions Manual

Commissioning, inspection, maintenance
Further details regarding the individual steps
Selecting the language (if required)
pensated control units
Note
When the unit is first taken into opera-
tion the display is in German (default
language setting):
Select heating circuit (see step 1.)
Outside temperature (see step 3.)

Checking the gas type

The boiler is equipped with an electronic combustion control unit that adjusts
the burner for optimum combustion in accordance with the prevailing gas qual-
ity.
The boiler can be operated with natural gas 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 11).
1. Determine the gas type and Wobbe
index by asking your local gas sup-
ply utility or LPG supplier.
10
only for weather-com-
Press the following keys:
1. c "Heizkreis wählen" (select
heating circuit) is displayed.
2. d to confirm; wait approx. 4 s.
3. c press this button again,
"Außentemperatur" (outside
temperature) is displayed.
4. b for the required language.
5. d to confirm.
3
) without conversion.
2. Convert the burner for operation
with LPG (see page 11).
3. Record the gas type in the service
report on page 115.
(cont.)