10 Maintenance
10.1 General
Perform the standard checking and maintenance procedures once a
year.
Perform the specific maintenance procedures if necessary.
Caution
Maintenance operations must be completed by a qualified
installer.
During inspection or maintenance work, always replace all
gaskets of the disassembled parts.
Replace defective or worn parts with original spare parts.
An annual inspection is mandatory.
10.2
Standard inspection and maintenance operations
For a service, always perform the following standard inspection and
maintenance operations.
Danger of electric shock
Ensure that the boiler is disconnected from the power supply.
Caution
Check whether all gaskets have been positioned properly
(absolutely flat in the appropriate groove means they are gas,
air and water tight).
During the inspection and maintenance operations, water
(drops, splashes) must never come into contact with the
electrical parts.
10.2.1 Checking the water pressure
1. Check the water pressure.
Important
The water pressure is shown on the display of the control panel.
The water pressure must be at least 0.8 bar
2. Refill the central heating system if the water pressure is lower than 0.8
bar.
Important
The recommended water pressure is between 1.5 bar and 2 bar.
For more information, see
Refilling the system, page 111
10.2.2 Checking the expansion vessel
1. Check the expansion vessel and replace it if necessary.
10.2.3 Checking the ionisation current
1. Check the ionisation current at full load and at low load.
The value is stable after 1 minute.
2. Clean or replace the ionisation and ignition electrode if the value is
lower than 3 µA.
10 Maintenance
100 AMC 7686707 - v.01 - 06092018
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