Gas Type Conversion; Function Sequence And Possible Faults - Viessmann Vitodens 200 Service Instructions Manual
Type wb2a, 8.8 to 20.0 kw wall mounted gas fired condensing boiler natural gas and lpg version
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Also See for Vitodens 200:
- Technical manual (180 pages) ,
- Installation instructions manual (148 pages) ,
- Service manual (132 pages)
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Further details regarding the individual steps
Gas type conversion
Gas restrictor installation
instructions
Gas restrictor allocation
Gas type
Natural gas
mm
E
Natural gas
mm
LL
LPG P
mm
Function sequence and possible faults
Control unit is-
sues heat de-
mand
Yes
Fan starts
Yes
Air pressure
switch enables
start (contact
closed across
terminals "X8.10"
and "X8.11")
Commissioning, inspection, maintenance
Internal 7
gas restric-
tor
6.2
8.1
4.2
Display screen
No
after approx. 51 s
No
fault F5/F9
after approx. 51 s
No
fault E6/F5
(cont.)
Measures
Increase set
value and ensure
heat is drawn off
Check fan cables
and plug-in con-
nectors
Check fan cables
and plug-in con-
nectors, check
fan
11
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