Checking The Gas Type; Gas Type Conversion (Only For Operation With Lpg); Function Sequence And Possible Faults - Viessmann VITODENS 200-W Installation And Service Instructions Manual

Commissioning, inspection, maintenance

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 30).

Gas type conversion (only for operation with LPG)

A
Fig.22

Function sequence and possible faults

Control unit issues a heat
demand
Yes
Fan starts
Yes
Ignition
30
3 3
(34.2 to 54.7 MJ/m ).
Display
No After approx. 51 s fault F9
No
Fault EE
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 30).
3. Record the gas type in the report on page 123.
1. Set adjusting screw
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)
■ In coding address "11", select value "9"
In coding address "82", select value "1" (LPG
■
operation)
■ In code "11", select value
■ End service functions.
4. Open the gas shut-off valve.
5. Affix label "G 31" in a clearly visible position near
the gas train on the cover panel.
The label is supplied with the technical documenta-
tion.
No
A on the gas train to "2".
".
8
"9".
≠
Measures
Increase set value and en-
sure heat is drawn off
Check the fan, fan connect-
ing cables, power at the fan
and fan control
Check ignition module (con-
trol voltage 230 V across
plugs "X2.1" and "X2.2").
Check the gas supply.