Viessmann Vitodens 100-W Installation And Service Instructions Manual page 50

Gas type conversion
Converting from LPG to natural gas
4. Remove gas restrictor D from gas
train.
5. Fit gas train A with new gaskets
E and F.
Fixing screw torque C: 3 Nm.
Union nut torque B: 22 Nm.
Converting gas type on the control unit
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50
6. Remove or void gas type sticker on
the top of the boiler (next to the type
plate).
1. Turn ON/OFF switch ON.
2. Simultaneously turn rotary selectors
"tw" and "tr" to their central posi-
tion.
"SERV" appears on the display.
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3. Turn rotary selector "tr" anticlock-
wise within 2 s.
"A" and the set value flash on the
display.
(cont.)