22
Attention!
Do not mix the heating water with in-
correct concentrations of antifreeze or
anti-corrosion substances! This could
damage the gaskets and cause noise
during operation.
La Unical AG S.p.A. will not be held
liable for damage to persons, animals
or objects due to failure to comply with
the above instruction.
- make sure that all the connections are watertight.
- after commissioning the boiler (see par. 3.10) and
bringing the system to the operating temperature,
stop the boiler and repeat the air bleed operations.
- let the system cool down and, if necessary, return
the water pressure to 0.8/1 bar.
(See par. 4.4).
When the system connections have been completed,
the circuit can be lled.
This operation must be performed carefully, respect-
ing the following phases:
- open the radiator vent valves and make sure the
automatic valve is working properly in the boiler.
- open the lling tap gradually, making sure that
the automatic air release valves installed on the
system work properly.
- close the radiator air release valves as soon as
water comes out.
- check the pressure gauge until pressure reaches
approximately 0.8/1 bar.
- close the lling tap and bleed air once again
through the radiator air release valves.
3.8 - FILLING THE SYSTEM
The connection between the appliance
and the domestic waste system must
be made in compliance with the specic
reference standards.
NOTE!
Further details in the section
‘‘Technical Information’’ on the
boiler page of the Unical AG S.p.A.
website.
Danger of burns!
Attention to contact with ow pipe M
and (if boiler combi) with hot water
outlet pipe C.
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