15
INSTALLATION
2.8 Filling the system
To fill the system:
– open the vent valves
– open all the system's shut-off devices
– slowly open the water tap
When water begins to leak out of the breather valves:
– close the breather valves
– complete system filling
– verify that you have reached the nominal pressure for the
system
– close the water tap
– check the tightness of the gaskets
It is recommended to repeat this operation after the de-
vice has been running for a few hours.
Regularly check the system's pressure.
A
Coil vent
A
2.9 Electric connections
The device leaves the factory fully wired up and needs only
the connection to the power supply, to any controls and ac-
cessories.
For the size of the power supply cable and safety devices, use
the following table.
Models
m.u.
400
600
800
Power conductor (phase+neutral)
mm²
1,5
1,5
1,5
protective conductor section on ground
mm²
1,5
1,5
1,5
Circuit breaker
A
2,0
2,0
2,0
N.B. The values indicated refer to a maximum line length of 15 m.
Make sure that:
• the characteristics of the electric network are adapted to
the absorption of the apparatus, considering also any oth-
er devices in parallel operation
• the power supply voltage and system frequency match to
the values indicated on the device's plate data
• the cables must be appropriate for the type of installation
in accordance with the applicable IEC standards
It is required:
• connect the device an efficient ground connection
• refer to the wiring diagrams in this booklet for any electri-
cal intervention
• the use of a dedicated main switch fitted with time-delay
fuse or with an automatic circuit breaker switch, installed
near the device
The device is equipped with suppression filter as laid
down by the applicable laws and standards. Use selective
circuit breakers to compensate for the micro-dispersion
on the ground of this device.
It is forbidden the use of gas and water pipes for ground-
ing the appliance.
If you need to replace the power cable, contact only qual-
ified staff and in compliance with the applicable national
laws.
Disconnect the main circuit breaker before making any
electrical connections and performing maintenance on
the equipment.
Access to the terminal block
Before doing any work, make sure that the supply power
is disconnect.
To connect the power supply: