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Draining the boiler’s primary circuit
1. Put the main switch on the control panel to OFF, cut the outside
power supply and close the gas-supply valve to the boiler.
2. Close the isolating valves (4) or manually set the 4-way valve (1)
to “0”.
3. Connect a flexible tube to the drain cock (7). Make sure it is
properly connected.
4. Open the drain cock and allow the hot water to flow into the
drain.
Drain the hot water circuit.
1. Put the main switch on the control panel to OFF, cut the outside
power supply and close the gas-supply valve to the boiler.
2. Release the pressure in the heating circuit until the pressure
gauge reads zero.
3. Close the cocks (1 and 8).
4. Open valve (9) and then (10).
5. Allow the hot water to flow into the drain.
The drain cock (9) must be at ground level for the
circuit to drain fully.
MAINTENANCE
SERVICE INTERVALS
ACV recommends that boilers should be serviced at least once a year.
The burner must be serviced and tested by a competent engineer.
If a boiler is subject to heavy use, it may require servicing more than
once a year - consult ACV for advice.
SERVICING THE BOILER
1. Turn OFF the on/off switch on the boiler control panel and isolate
external electrical supply.
2. Turn off the gas or oil supply to the boiler.
Vertical flue-gas outlet reducer
3. Take down and remove the flue lining to release the top of the
boiler.
4. Loosen the nuts and remove the chimney reducer.
5. Take out the turbulators from the flue ways to clean them.
6. Dismantle the chamber plate and remove the burner.
7. Brush the flue ways.
8. Clean the combustion chamber and the burner.
9. Replace the turbulators, the chimney reducer, and the flue lining;
check that the seal on the chimney reducer is in good condition.
Replace the seal if necessary.
Horizontal flue-gas outlet reducer
3. Loosen the nuts and remove the chimney reduction.
5. Take out the turbulators from the flue ways to clean them.
6. Dismantle the chamber plate and remove the burner.
7. Brush the flue ways.
8. Clean the combustion chamber and the burner.
9. Replace the turbulators, the chimney reducer, and the flue lining;
check that the seal between the chimney reducer and the
chimney is in good condition. Replace the seal if necessary.
SERVICING THE SAFETY DEVICES
- Check that all thermostats and safety devices are working properly.
- Test the safety valves on the central heating and hot water circuits.
SERVICING THE BURNER
- Check that the insulation and the seal on the chamber plate are in
good condition; replace them if necessary.
- Check and clean the burner and the electrodes. Replace the
electrodes if necessary
(1 x per year in normal usage conditions)
- Check that the safety devices are in good working order.
- Check the combustion
(CO2, CO, and gas pressure)
and record the
values and any other comments on page 23 of the service record.
DRAINING THE BOILER
Water flowing out of the drain cock may be
extremely hot and could cause severe scalding.
Keep people away from discharges of hot
water.
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