Viessmann Vitodens 100-W Installation Instructions Manual page 16

GB
Changing the gas type at the control unit
Matching the burner output to the flue system
Installation and service instruc-
tions
Closing the control unit and starting the boiler
1. Close the control unit enclosure
and pivot the control unit back up.
2. Fit the front panel.
16
r r
(cont.)
3. Turn rotary selector "tr" fully anti-
clockwise within 2 s.
"A" and the new set value flash
on the display.
4. Use rotary selector "tw" to change
the control unit to natural gas or
LPG.
The display shows:
■ "0" for operation with natural gas
or
■ "1" for operation with LPG
5. The selected gas type has been
accepted when the value stops
flashing. The control unit enters
standard mode.
3. Start the boiler and check it is work-
ing correctly.
Installation and service
instructions