INSTALLATION
16
4.3.
Filling the system
After completing all the hydraulic connections, the circuit may be filled with water. After filling
the system, open the radiators air valves to get rid of the air in the installation.
Verify that the installation pressure is according to the technical feature of the boiler. The
pressure must be verified through the boiler’s manometer. An additional manometer should be
installed on the cold water inlet to verify the cold pressure, at the lowest point of the installation,
at a point close to the boiler.
The whole installation must remain under nominal pressure for at least 10 minutes. During this
period, check that all the connections are tight and there are no water leakages. Make sure that
during this period no pressure drop appears.
After firing the boiler, make sure the network functions properly at working temperature and
pressure.
The hardness of the mains water supply affects the boiler’s life span. It is
recommended to use a water softener if water hardness exceeds 15
o
f.
Do not fill the system at the working pressure! When the boiler will be heated,
the water pressure will raise. Filling pressure must be at least 1 bar lower than
working pressure!
4.4.
Chain thermostat installation
ECOTWIN boiler is equipped with air door on the lower part
and is delivered with chain thermostatic regulator.
Install the regulator at the connection pipe on the upper
side of the boiler and pass the chain through the hook
provided on the air door.
Choose the desired boiler temperature from the
thermostat head (red scale is valid).
The thermostatic regulator controls the boiler temperature
by controlling the supply of combustion air. The chain
length must be adjusted so that when the set temperature
is reached the air door is in closed position and no air is
supplied.
