22
B
C
A
Fig. 17
1.
Close the shut-off valves on the heating water side.
2.
Remove cover panel
A
.
3.
Connect the drain hose fitted at top valve
B
to a
drain connection.
4.
Open fill valve
C
and air vent valve
B
and vent at
mains pressure until no sound of escaping air can
be heard.
Note
Check the system pressure at the pressure gauge.
Never exceed 1.5 bar (150 kPa).
5.
First close valve
B
.
6.
When the required operating pressure has built up,
close valve
C
. Minimum system pressure 0.8 bar
(80 kPa)
Open the shut-off valves on the heating water side.
7.
Remove the drain hose again from top valve
B
and retain outside the boiler.
Changing the gas type
In the delivered condition, the boiler is set up for oper-
ation with natural gas (G 20).
For operation with a different gas type, install a conver-
sion kit and change the gas type at the control unit.
Separate installation instructions
Enter the selected gas type and the associated limits
for flue gas emissions in the table below.
For values, see separate installation instruc-
tions.
Commissioning, inspection, maintenance
Venting the boiler by flushing
(cont.)
5697789
Содержание Vitodens 111-W
Страница 5: ...5 13 Keyword index 58 Index Index cont 5697789...
Страница 59: ...59 5697789...
