EN • 16
FILLING THE HOT WATER AND HEATING CIRCUITS
IMPORTANT
It is essential that the water tank is under pressure
before the heating circuit is filled.
1. Fill the hot water circuit and pressurise it.
2. Fill the heating circuit - do not exceed a pressure of 2 bar.
3. Vent the air in the top of the boiler.
4. Once you have vented the system, return the pressure to 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 gas or 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. Move the Summer/Winter switch to the required position.
5. Move the main switch to “ON”.
6. Carry out the necessary venting operations, measurements and
settings.
RECOMMENDATION
ACV recommends that you have the boiler serviced at least once
a year. Boiler servicing and checking must be carried out by a
qualified engineer.
MAINTENANCE OF BOILER
1. Isolate the boiler from the electrical supply at the switch on the
external control box, and close the gas or oil supply valve.
2. Move the main switch on the control panel to “OFF”.
3. Remove the chimney flue (G) to free the top of the boiler.
4. Remove the jacket top (A) and lift off the flue reducer (B).
5. Remove the baffles (C) from the flue ways (D) and clean them.
Replace these items if worn.
6. Remove the burner cover and burner [E].
7. Brush the flue ways (D).
8. Clean the combustion chamber (F) and the burner.
9. Check the condition of the seal on the burner chamber plate [H].
MAINTENANCE OF BURNER
See the technical and maintenance manual of the burner.
MAINTENANCE OF SAFETY EQUIPMENT
- Check that all thermostats and safety devices operate correctly:
boiler thermostat, thermal reset high limit thermostat and manual
reset high limit thermostat.
- Check the safety valves in both the heating circuit and the hot
water circuit.
COMMISSIONING AND MAINTENANCE
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
1. Move the main switch on the control panel to “OFF”, isolate the
boiler from the electrical supply at the switch on the external
control box and close the gas or oil supply valve.
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.
Draining the hot water circuit
1. Move the main switch on the control panel to “OFF”, isolate the
boiler from the electrical supply at the switch on the external
control box and close the gas or oil supply valve.
2. Release the pressure in the heating circuit until the pressure
gauge reads zero.
3. Close the tap (7) and the isolating valve (11).
4. Open the drain cock (9) and air vent (10) (first 9 then 10).
5. Allow the hot water circuit to discharge to the drain.
The drain cock (9) must be at ground level for the
circuit to drain fully.
Water escaping from the safety valve or safety
group can be extremely hot and cause very
serious burns.
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