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
Oil burner
MAINTENANCE
Draining the hot water circuit
1.Turn OFF the on/off switch on the boiler control panel, isolate external electrical supply, and turn off the gas or oil supply to the boiler.
2.Release the pressure in the heating circuit until the pressure gauge indicates zero bar.
3.Close stop cock (1) and turn off tap (8).
4.Open valve (9) then valve (10) (first 9 then 10).
5.Let the water empty into the drain.
-Check and if necessary clean the main filter on the oil line.
-Check the alignment of the nozzle: check, clean or change the nozzle and its filter, check that the electrodes and flame holder are clean and correctly adjusted.
-Reassemble and check that the safety components are working properly.
-Set the combustion parameters.
-Check the combustion (CO2, CO and burner pressure) and record the values and any remarks in the Service Record on page 24.
Gas burner
-Check that the insulation and gasket on the burner chamber plate are in good condition - replace if necessary.
-Check and clean the burner and electrodes. Replace electrodes if necessary (under normal use once a year).
-Check that the safety components are working properly.
-Check the combustion (CO2, CO and gas pressure) and record the values and any remarks in the Service Record on page 24.
DRAINING THE BOILER
3
1 2
4 
2 | 6 | |
8 | ||
| ||
| 7 | |
| 10 | |
| 11 | |
5 |
|
Water flowing out of the drain cock may be extremely hot and could cause severe scalding. Keep people away from discharges of hot water.
Draining the heating circuit
1.Turn OFF the on/off switch on the boiler control panel, isolate external electrical supply, and turn off the gas or oil supply to the boiler.
2.Close the isolating valves (4).
3.Connect a hose to the drain cock (7).
4.Open the drain cock to drain the primary circuit.
8
1 2 3 4
| 5 |
4 | 6 |
| |
| 7 |
9 
For the tank to be emptied, valve (9) must be situated at ground level.
SPARE PARTS
Please refer to the specific document available from ACV or your distributor.
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