Checking The Gas Type; Gas Type Conversion (Only For Operation With Lpg); Checking The Static Pressure And Supply Pressure - Viessmann Vitodens 222-F Installation Instructions For Contractors

Venting the heating system
5. Open the gas shut-off valve.
Activating the venting function
Service menu
1. Press OK and simultaneously for approx. 4 s.
å
2. Select " " with and confirm with OK.
5
Ú
"ON" flashes.

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.

Gas type conversion (only for operation with LPG)

1. Turn on the ON/OFF switch
2. Select the gas type in coding address "82".
■ Calling up code 2
Call up "General" (control unit for weather-com-
■
pensated operation)
or
Group 1 (constant temperature control unit).
■ Select coding address "11" and set 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 "0".
■
Confirm with OK. The display shows "11:0".
■ End service functions.

Checking the static pressure and supply pressure

Danger
CO formation as a result of incorrect burner
adjustment can have serious health implications.
Always carry out a CO test before and after
work on gas appliances.
Operation with LPG
Purge the LPG tank twice on commissioning or
replacement. Vent the tank and gas connection line
thoroughly after purging.
(cont.)
3. Activate the venting function with OK.
4. Ending venting function:
■
■
. 3. Open the gas shut-off valve.
4. Affix label "G31" (supplied with the technical docu-
Commissioning, inspection, maintenance
"EL on" is shown constantly.
press .
ä
For operation with natural gas, no adjustment is
therefore required across the entire Wobbe index
range.
For operation with LPG, the burner must be conver-
ted (see following chapter).
mentation) next to the type plate.
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