4.3.2 EMPTYING THE DOMESTIC HOT WATER TANK:1. Switch the mains power to the boiler off at the external switchinstalled by the electrician.2. Close valves (A) and (B).3. Open valves (C) and (D) (first C then D).4. Let the water drain away.5. When you have finished, return the valves to their initial positions.8. After allowing the circulator to work for a few minutes, set the on/offswitch to the OFF position, bleed the circulation pump and makesure that both the boiler and the system are properly bled. Adjustthe pressure to the static pressure (1 bar = 10 m – 1.5 bar = 15 m)+ 0.5 bar.9. The boiler is now ready to operate. Set the on/off switch to the ONposition, the summer/winter selector, the half and full powerswitches and the control thermostat all to the desired positionsAfter a few days in operation we advise you tocheck the quality of the electrical connections andalso make sure there is no air in either the boiler orthe system.Switch the power supply off from the outside boxbefore carrying out any work.84.4 RECOMMENDATIONACV recommend that boilers should be serviced at least once a year.This servicing work should be carried out by a competent technician.4.5 SPARE PARTSPlease refer to the specific document available from ACV or yourdistributor.3.1 FILLING THE HEATING AND DOMESTIC HOTWATER CIRCUITS1. Fill the domestic hot water circuit and bring it up to pressureIMPORTANTThe hot water tank must be pressurised before theheating circuit is filled.2. Fill the central heating circuit making sure that any air in the upperpart of the boiler and any air in the system is bled.3. Remove the front of the boiler.4. Check the electrical connections paying particular attention to thequality of the connections on the power circuit terminals.5. Set all the switches on the control panel to the OFF position andset the internal magneto-thermal circuit breaker to ON. Replacethe front of the boiler.6. Switch the boiler on from the external box.7. Set the on/off switch to the ON position and the summer/winterselector switch to the winter position.3 STARTING UP4.1 SERVICING THE BOILER1 - Set the on/off switch on the control panel to the OFF position andswitch the power off from the external box.2 – Remove the top panel and the front and carry out a visual inspectionof the boiler looking out for any leaking water.3 – Inspect the wiring looking for any sign of overheating.4 – Check that the screws on the connection terminal block are properlytightened.5 – Replace the front and the top panel.6 – Switch the boiler back on again.4.2 SERVICING THE SAFETY DEVICES- Check that the thermostats and safety devices are workingproperly.- Check the safety valves on both the central heating and the hotwater circuits.4.3 EMPTYING4.3.1 EMPTYING THE PRIMARY CIRCUIT (CENTRALHEATING):1. Switch the power to the boiler off at the mains switch installed bythe electrician.2. Close the boiler system’s isolating valves (1).3. Connect a hose to the drain cock (2) and make sure that it isproperly connected.4. Open the drain cock and allow hot water to flow out into the wastewater disposal system, check that air is being taken into thesystem, by opening the air vent, for instance.5. Once you have finished, put the drain cocks back into their originalpositions and adjust the pressure to the static pressure + 0.5 bar.4 SERVICINGThere is a risk of burns from hot water!To allow the tank to be emptied, valve (C) must be situatedat ground level.