MAINTENANCE INSTRUCTIONS
46
6.4 Draining the central heating system
If the need arises to drain the system, this can be done
as follows:
• Switch the system to “WINTER” mode and ignite the
boiler.
• Switch off the power supply to the boiler.
• Wait for the boiler to cool down.
• Connect a hosepipe to the system drain point and
locate the other end of the hose in a suitable
drainage system.
• Open the system drain valve (see fig. 1).
• Open the air vents on the radiators, starting with the
highest and moving down the system to the lowest.
• When the system has been drained, close the
radiator breather valves and the drain valve.
Draining the domestic hot water system
If there is a danger of freezing, the domestic hot water
system should be drained. This can be done as follows:
• Close the mains water supply valve.
• Joint the water draining pipe and open the cylinder
draining tap (see fig. 2 - A)
• Open all the hot and cold water taps.
• On completion, close all the previously opened
taps.
Boiler maintenance
It’s necessary to check and replace the magnesium
anode after a year or more frequently if the quality and
the water worn require it.
In order to check the anode functioning it’s necessary to
open the small valve situated on the top of the boiler
(see fig. 2 - B). If during this operations there is a water
leak, the anode has to be replaced because worn.
Otherwise, if there is any water leak the anode is still
functioning. Once this operation has been completed it’s
important to close the small valve.
Fig. 1
A
B
Fig. 2
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