MAINTENANCE AND OPERATING MANUAL
Installation
HAS T 070÷140
45
ENGLISH
EN
The data in this manual are not binding and they can be modified by the manufacturer without notice. Reproduction of this manual is strictly prohibited.
4.3.5 Electrical connections
The unit's connection to the power supply must be made in compliance with laws and prescriptions in force in the place of
installation.
The voltage, frequency and number of phases must comply with the data on the unit's nameplate. The power supply voltage
must not be outside the tolerances shown on the electrical diagram, even in terms of transients. Unless otherwise specified,
the frequency tolerance is +/-1% of the nominal value (+/-2% for short periods).
With a three-phase power supply the voltage must be symmetrical (the effective values of phase to phase voltages and
consecutive phase angles must be identical). In particular, unless otherwise indicated, the maximum permissible phase
imbalance is 2%, calculated according to the formula
Vavg = average phase voltage
The line conductor and neutral conductor are not interchangeable and their positions cannot be switched.
For the electrical power supply:
1.
Connect the unit (PE terminal in the electrical cabinet) to the electrical earthing system of the building.
2.
ensure automatic interruption of the power supply in the event of an insulation fault (protection against
indirect contact in compliance with the prescriptions of IEC 60364) by means of a residual current device (the
nominal trip current of which should normally be set to 0.03 A).
3. make sure the level of protection against indirect contact at the source of the power feeding cable is equivalent at
least to IP2X or IPXXB (refer to CEI EN 60529).
4. at the start of the power cable install a device that protects it from current surges (short-circuits) (refer to the
indications given in the electrical diagram).
5. use conductors rated to carry the maximum current required at the maximum operating ambient temperature,
according to the chosen installation type (IEC 5-60364-523) (see the indications on the electrical diagram).
6. it must be installed a safety device which limits the 17 kA peak short circuit current to its own nominal cut-off
power when the short circuit current at the operation point is higher than 10 kA effective.
Indications on the electrical diagram:
• maximum permissible size of the fuse type gG.
In general, fuses can be replaced by an automatic circuit breaker set in relation to the unit's maximum current
input (consult the manufacturer if necessary)
• section and type of power cable (if not already supplied):
Installation: insulated conductors or multicore cable in an overhead or wall-mounted cable duct (type C in
compliance with IEC 5-523-60364 1983) without any other cables in contact
cable type: copper conductors, 70 °C PVC insulation (unless otherwise specified) or 90 °C EPR insulation
4.3.6 Phase Monitor
The electronic controller, with the aid of a Phase Monitor (see unit wiring diagram), enables to control unit electric power
feeding, stopping the unit in case of incorrect phase sequence or phase failure.
Tripping of the Phase Monitor stops the unit and the relative alarm is displayed.
Some measure of instability on the power feeding line can be considered to be normal.
If the frequency of unit shut-downs caused by Phase Monitor tripping should increase, contact your electricity company in
order to solve the problem.
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