Checking The Gas Type - Viessmann Vitopend 100-W Installation And Service Instructions For Contractors

Further details regarding the individual steps
4. If the control unit was already on
before filling begins:
■ Simultaneously turn both rotary
selectors anti-clockwise as far as
they will go.
■ Switch OFF the ON/OFF switch on
the control unit and switch it ON
again after 3 s.
4
3
2
1
3
2
1
■ Turn rotary selector "tw" into the
control range for approx. 3 s and
then back again.
The servomotor of the diverter valve
moves to its centre position.
Note
The pump will run for approx.
10 min.

Checking the gas type

In the delivered condition, the boiler is
preset for natural gas E.
5
6
3s
4
5
6
Commissioning, inspection, maintenance
(cont.)
5. After the system has been fully
charged and vented, switch OFF the
ON/OFF switch at the control unit.
6. Close the fill valve in the heating
return (on site).
7. Close the shut-off valves on the heat-
ing water side.
The boiler can be operated in the Wobbe
index range W 11.4 to 15.2 kWh/m
s
(40.9 to 54.8 MJ/m
3
3 ).
19