EBARA HERTZ ONE Manual página 19

5. OPERATION
The HERTZ ONE operates the unit as follows:
Starting and control of the first electric pump at variable speed with the inverter.
− Starting and control of the second and/or third (where expected) electric pump with mains supplied relay.
− Start and stop button for each electric pump with related signal light. (see chap. 8).
− Inverter change every electric pumps start; only for H.O. M 2x1,1MX.
− Button for the parameterization of the system. (see chap. 8).
− Four digit display of the instantaneous system parameters: (see tab. 9.1).
− Four digit display of the settable system parameters (see tab. 9.1.1).
− Protection of the electric pumps with indications in the alarms list of the type of alarm tripped (see tab. 9.3)
− Automatic operation switchover with pressure gauge in the event of the inverter control card blocking and/or
fault of the pressure transmitter. (The first inverter supplied pump is excluded).
− Control of the operating time of each electric pump with maintenance signalling.
− Automatic shutdown of the system after one minute, when the delivery is at zero litres/min.
− Rotation of the second and third electric pumps starting order.
− Automatic restart with a reduced reference pressure of 0.5 bar to avoid frequent starts.
− Fuse protection of the HERTZ ONE and the power supply line.
− Including cutout switch with door locking.
6. ELECTRICAL INSTALLATION.
The electrical power supply values indicated on the rating plate must be respected.
The electrical panel must be installed on a dry and vibration free surface and in an environment free of oxidising
and corrosive gases. If installed outside the panel must be protected as much as possible from direct irradiation.
Suitable steps must be taken to ensure that the external temperature of the panel is within the limits indicated
in chap. 4. High temperatures cause accelerated aging of all components causing more or less serious
failures.Those performing the installation should also make sure that the cable clips are correctly sealed.
Before connecting the power supply cables to the L1 – N terminals of the cutout switch, ensure that the power
distribution panel cutout switch is in the OFF (O) position and that the panel operation cannot be accidentally
restored again.
Closely observe all the regulations in force regarding safety and accident prevention.
Make sure that all the terminals are fastened securely.
Connect the cables in the terminal board according to the wiring diagrams shown on par.
Make sure that all the connection cables are in perfect condition, with the outer sheath undamaged.
WARNING! Fit a Class A 30 mA differential switch on the system that is protected against inopportune tripping with
a trip delay of 0.5 seconds.
Make sure the power supply is protected against short circuits by means of "AM" type fuses of:
HERTZ ONE
MODELS
GAUGE
DIMENSIONS
The system should ideally be correctly and safely grounded as required by the related standards.
Limit the length of the power supply cable based on the section of the cable used
Instrumental controls to be performed by the installer:
a) Stability of the protection conductors and of the main and auxiliary unipotential circuits
b) Insulation resistance of the electrical system
c) Differential protection efficiency test
d) Applied voltage test
e) Operating test
ENGLISH
HERTZ ONE HERTZ ONE
M 1 x-1,1M, M 2 x-1.1M
M 1 x-1.5T M 2x1.1MX
12 A AM 25 A AM
10x38 10x38
HERTZ ONE
M 3x-1.1M
32 A AM
14X51
18
7.1, 7.1.1 e 7.1.2.