ACV BNE 1 - Page 5

3
USER GUIDE
Operation of the pump:
The pump is controlled by the minimum thermostat, at the rear of the
boiler. This is pre-set to 45°C, delaying the activation of the boiler
pump when the burner starts, thus avoiding any risk of corrosion in the
combustion chamber.
Gauge pressure in the heating system
Your system must be equipped with a heating safety valve
calibrated to 3 bar.
Ensure that the system is always under water pressure. When the
system is cold and the air inside it has been vented, the gauge must
indicate a pressure of between 1 and 1.5 bar, depending on the
height of the building.
To add water:
(Fig. 9, page 7)
• Open the filling valve (5).
• Close the valve properly after filling.
• Vent the system and the boiler in order to obtain an accurate
reading of the pressure inside the heating circuit.
Safety valves (heating circuit) (Fig. 9, page 7 - item 2)
If water is found to be escaping from the safety valve, stop the
boiler and contact your installer for advice.
A monthly test is recommended:
Lift the lever on the drain cock for a few seconds to ensure that the
safety valve is working correctly.
If there is a problem after this short test,
please contact your installer for advice.
The water escaping from the safety valve may
be extremely hot and can cause severe burns.
Safety group (hot water circuit)
It is normal for water to escape from the safety group each time the
hot water tank is heated. A hot water expansion vessel may reduce
or even prevent this escape. (Fig. 10, page 7 - item 6)
A monthly test is recommended:
Lift the lever on the drain cock for a few seconds to ensure that the
safety valve is working correctly.
If there is a problem after this short test,
please contact your installer for advice.
Fig. 1: Control panel
Max
Min
Max
Min
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0
9
8
7
6
5
4
3
2
1
2
4
2
3
2
2
2
1
2
0
1
9
GRASSLIN
GRASSLIN
I
O
The water escaping from the safety group may
be extremely hot and can cause severe burns.
SETTING THE ACV BURNER TO SAFETY MODE
If the burner is not working:
1. The burner indicator lamp lights.
2. Press the burner reset button
(Fig. 2) on the burner.
3. If the burner still does not work, remove the boiler front panel
and reset the high limit thermostat on the top of the boiler
body
(Fig. 3).
4. If the problem persists, check your fuel oil level before contacting
your installer for advice.
1 3 4 5 8762
Fig. 2
Fig. 3