37
ON/OFF
RESET
COMFORT
32
33
26
27
30
Fig. 15.6
41
42
43
44
45
39
40
Fig. 15.5
(fig. 15.5)
Domestic hot water circuit
- open cold water tap
40
- drain the hot water tank and appliance by
drawing off from the various hot water taps.
Heating circuit
- check that the heating outlet tap
41
and
heating return tap
42
are fully open
- open the filling taps
43
and
44
- close these taps when the needle of the
pressure gauge
37
(under the door of the
electrical unit cover) reaches the pressure
set in § 3
- drain the appliance and re-establish the
pressure
Gas circuit
- open the gas tap
39
- flush the gas circuit
- check the sealing over the whole gas circuit
(fig. 15.6)
- press the on/off button
26
on the control panel and
turn selector
32
to the “winter” operating mode. The boiler
pump will start up and three attempts will be made to ignite
the burner (display
S01
, then
S02
. After the third attempt,
the electronic control unit will shut the appliance down as
the gas supply has been cut off; the warning light
30
comes
on and “
A01
” appears on the display.
- leave the pump running until all the air has been
exhausted from the appliance.
- bleed the air from the radiators
- open the Domestic hot water circuit to eliminate all the air
from it
- check the appliance pressure, and if it has fallen, add
water to bring it back to 1 bar.
- check the exhaust gas evacuation duct.
- check that the ventilator inlets for the room are fully open
(type B appliances).
6. Reset the boiler by pressing the button
27
.
The burner comes on. If the first attempt fails, the gas pipe
must be purged;
repeat the operation until the burner ignites.
RESET
ON/OFF
15.4 Pressurisation
15.5 Commissioning
WARNING
:
It is very important to fully bleed the main heat exchanger of air when filling the boiler.
You must continue to bleed the heat exchanger from pump through the automatic air vent, through several
central heating and hot water cycles to ensure the air is fully bled from the system.
Refer to the installation manual for detailed guidance.
Failure to adequately bleed the boiler may damage the appliance and invalidate the warranty.
