Checking The Gas Type; Gas Type Conversion (Only For Operation With Lpg) - Viessmann VITODENS 200-W Service Instructions Manual

Further details regarding the individual steps

Checking the gas type

The boiler is equipped with an electronic combustion controller that adjusts the burner
for optimum combustion in accordance with the prevailing gas quality.
■ Consequently, for natural gas there is no adjustment required across the entire
Wobbe index range.
The boiler can operate in the Wobbe index range 9.5 to 15.2 kWh/m
3
54.7 MJ/m ).
■ Convert the burner for operation with LPG (see "Gas type conversion" on
page 13).
1. Determine the gas type and Wobbe
index by asking your local gas supply
utility or LPG supplier.
2. Convert the burner for operation with
LPG (see page 13).

Gas type conversion (only for operation with LPG)

A
Commissioning, inspection, maintenance
(cont.)
3. Record the gas type in the report on
page 140.
1. Set adjusting screw A on both gas
trains to "2".
2. Turn ON/OFF switch "8" ON.
3. Select the gas type in coding address
"82":
■ Call up code 2
■ Call up "General" (weather-com-
pensated control)
or
Group "1" (constant temperature
control)
■ In coding address "11", select
value "9"
■ In coding address "82", select
value "1" (LPG operation)
■ In code "11" select value ≠ "9".
■ End service functions.
4. Open the gas shut-off valve.
3
, (34.2 to
13