10 Burner maintenance
Refer to the instructions supplied with the burner.
11 System maintenance
11.1 Water level
Regularly check the level of water in the system and top up if
required, taking care that cold water is not added suddenly into the
boiler when it is hot.
11.2 Draining
We advise you against draining the system unless it is absolutely
necessary.
20/09/2011 - 300016243-001-D
This operation should be required only a few times in each heating
season, with very low quantities of water; otherwise, look for the leak
and repair it.
P 320
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