30
4
To facilitate maintenance operations, if neces-
sary, unscrew the indicated plastic nut 1 and
turn down the panel.
Inspections and maintenance performed profes-
sionally and according to a regular schedule, as
well as the use of original spare parts, are of the
utmost importance for fault-free operation of the
boiler and to guarantee its long life.
Yearly maintenance of the appliance is mandatory
in compliance with Laws in force.
4.1 - INSPECTION AND MAINTENANCE
INSTRUCTIONS
To assure long-term functioning of your appliance and to avoid
altering its approved status, only original Unical spare parts
must be used.
If a component needs to be replaced:
• Disconnect the appliance from the electrical mains and make
sure that it cannot be reconnected accidentally.
• Close the gas shut-o valve upstream the boiler.
• If needed, and depending on the intervention to be carried
out, close any shut-o valves on the ow and return line of
the heating system, as well as the cold water inlet valve.
Once all maintenance operations are complete
resume boiler operation.
• Open the heating ow and return pipes, as well as the cold
water inlet valve (if closed previously).
• Vent and, if necessary, restore the heating pressure until
reaching a pressure of 0.8/1.0 bar.
• Open the gas shut-o valve.
• Switch the boiler on
• Make sure the appliance is gas tight and watertight.
Failure to perform Inspections and Maintenance
can entail material and personal damage.
INSPECTION AND
MAINTENANCE
Danger of burns!
during maintenance operations.
OBLIGATION!
wear gloves protective
To Next Page
Loading...
