Checking The Gas Type; Gas Type Conversion (Only For Operation With Lpg); Checking The Static And Supply Pressure - Viessmann Vitodens 200-W Installation And Service Instructions For Contractors

Checking the gas type

The boiler is equipped with an electronic combustion
controller that adjusts the burner for optimum combus-
tion in accordance with the prevailing gas quality.
For operation with natural gas no adjustment is
■
therefore required across the entire Wobbe index
range.
The boiler can be operated in the Wobbe index
range 9.5 to 15.2 kWh/m
For operation with LPG the burner must be conver-
■
ted (see "Gas type conversion" on page 25).

Gas type conversion (only for operation with LPG)

A
Fig. 20

Checking the static and supply pressure

Danger
CO build-up as a result of incorrect 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 commissioning or
replacement. Vent the tank and gas connection line
thoroughly after flushing.
3 3
(34.2 to 54.7 MJ/m ).
Commissioning, inspection, maintenance
1. Determine the gas type and Wobbe index by asking
your local gas supply utility or LPG supplier.
2. For operation with LPG, convert the burner (see
page 25).
3. Record the gas type in the report on page 115.
1. Set adjusting screw
A
2. Turn on the ON/OFF switch
3. Select the gas type in coding address "82":
Call up code 2
■
Call up "General" (weather-compensated control
■
unit)
or
Group 1 (constant temperature control unit).
Select coding address "11" and value "9". Confirm
■
with OK. The display shows "11:0".
Select coding address "82" and set value "1"
■
(LPG operation). Confirm with OK.
Select coding address "11" and set value
■
Confirm with OK. The display shows "11:0".
End service functions.
■
4. Open the gas shut-off valve.
5. Affix label "G31" (supplied with the technical docu-
mentation) adjacent to the type plate on the cover
panel.
A
Fig. 21
on the gas train to "2".
.
8
"9".
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25