MAINTENANCE
COMMISSIONING
15
2. Vent the system.
3. Once you have vented the system, return the pressure to the
static pressure plus 0.5 bar.
Height of the heating system:
• 10 m
➠
heating circuit pressure = 1.5 bar
• 15 m
➠
heating circuit pressure = 2 bar
USING THE BOILER FOR THE FIRST TIME
1. Check the fuel oil supply connection and ensure that it is free
from leaks.
2. Check the electrical connection to the boiler and the boiler room
ventilation, and ensure that the flue gas discharge pipes and the
burner chamber plate are properly gas tight.
3. Set the boiler thermostat to between 60° and 90°C.
4. Place the Summer/Winter switch to the required position.
5. Place the main switch to “ON”.
6. Carry out the necessary venting operations, measurements and
settings.
RECOMMENDATION
It is compulsory to have the boiler serviced once a year. Boiler
servicing and checking must be carried out by a qualified engineer.
MAINTAINING THE BOILER
1. Isolate the boiler from the electrical supply at the switch on the
external control box and close the fuel oil supply valve.
2. Place the main switch on the control panel to “OFF”
(except for the
N-Mini).
3. Remove the boiler front panel (1)
(except for the N-Mini).
4. Loosen the two nuts or locking clamps for the N-Mini to open the
burner chamber plate (2).
5. Remove the insulating brick
(for the N-Mini only).
6. Remove the stainless-steel turbulators (3).
7. Brush the flue ways, clean the chamber and vacuum up any soot
deposits.
8. Check the insulation of the burner chamber plate (4).
9. Before reassembling, clean the burner combustion head (5).
10. Check that the thermostats and safety valves are working
correctly.
14
MAINTENANCE OF SAFETY EQUIPMENT
- Check that all thermostats and safety devicesoperate correctly: the
boiler thermostat and the manual reset high-limit thermostat (103°C).
- Check the heating circuit safety valves.
DRAINING THE BOILER
The water draining from the drain cock is
very hot and can cause serious burns.
Keep all persons away from running
hot water.
Draining the heating circuit
(fig. 20)
1. Place the main switch on the control panel to “OFF”, isolate the
boiler from the electrical power supply at the switch in the external
control box.
2. Close the isolating valves (8) in the heating circuit.
3. Connect a flexible tube to the drain cock (9).
4. Open the drain cock (9) to drain the heating circuit.
D A N G E R
HOT
FILLING THE HEATING CIRCUIT
IMPORTANT
If your “N” boiler is connected to an ACV tank, it is
essential to fill the domestic water circuit before the
heating circuit.
1. Open valves 5 and 8 to fill the heating circuit and make sure the
pressure does not exceed 2 bars.
9
5
6
2
1
3
8
8
4
7
fig. 20
fig. 21
1
2
3
5
4
