4.
Fill the heating system with water
and vent it, until the pressure indi-
cated at the pressure gauge is
higher (0.1 to 0.2 bar) than the inlet
pressure of the diaphragm expan-
sion vessel.
Minimum system pressure 0.8 bar,
permissible operating pressure
3 bar.
5.
Return the check valves to their
operating position.
Checking the gas type
Note
The boiler is set up in the factory for natural gas E.
The boiler can be operated in the Wobbe index range 12.0 to 16.1 kWh/m
3
(43.2
to 58.0 MJ/m
3
).
1.
Check the gas category and
Wobbe index (Wo) with your mains
gas or LPG supplier and compare
them with the details on the burner
label.
2.
Convert the burner in accordance
with the details provided by the
mains gas or LPG supplier to
match the fuel provided, if these
details diverge.
Conversion kit installation
instructions
3.
Record the gas type in the service
report on page 32.
Wobbe index range
Wobbe index Wo
Natural gas
LPG
E
LL
P
kWh/m
3
12.0 to 16.1
10.0 to 13.1
20.3 to 21.3
MJ/m
3
43.2 to 58.0
36.0 to 47.2
72.9 to 76.8
Changing the gas type (if required)
Conversion kit installation
instructions
Further details regarding the individual steps
(cont.)
7
Initial start-up, inspection, maintenance
5692
647
GB
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