Checking The Gas Type; Checking The Static Pressure And Supply Pressure - Viessmann Vitopend 100-W Installation And Service Instructions Manual

Further details regarding the individual steps
■ Turn rotary selector "tw" approx.
3 s into the control range and then
back again.
The servomotor of the diverter valve
goes into its centre position.
Note
The pump runs for approx. 10 min.
5. After the system has been fully filled
and vented, switch OFF the ON/OFF
switch at the control unit.

Checking the gas type

In the delivered condition, the boiler is
preset for natural gas E.
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 ).
1. Check the gas type and Wobbe index
(W ) with your gas supply utility or
s
LPG supplier and compare them with
the details above.
2. Convert the burner to the available
gas type in accordance with the
details provided by the gas supply
utility or your LPG supplier, if the
details do not match.
3. Record the gas type in the "Reports"
table.

Checking the static pressure and supply pressure

Danger
CO build-up as a result of incorrect burner adjustment can have serious health
implications.
Carry out a CO test before and after work on gas appliances.
Commissioning, inspection, maintenance
6. Close fill tap in the heating return (on
site).
7. Close the shut-off valves on the heat-
ing water side.
Wobbe index range W
W
s
Natural gas H
3
LPG P
Note
The indicated Wobbe index W
apply to the following ambient condi-
tions:
■ Air pressure: 1013 mbar
■ Temperature: 15 °C
(cont.)
s
3 3
kWh/m MJ/m
12.7 to 45.6 to
15.2 54.8
20.3 to 72.9 to
24.4 87.8
values
s
19