MANUALE DI ISTRUZIONI / INSTRUCTION MANUAL
RADIATORI REMOTI / DRY COOLERS
RAN-RAL - Rev 1.0. - 11-10-2002 IT - EN
25 (32)
ELECTRICAL CONNECTIONS
A correct electrical connection, carried out accurately and in compliance with local regulations, is
extremely important in order to prevent accidents and to ensure long trouble free operation.
Before working on the electrical parts of the unit, make sure that the power is off and that the isolator
switch on the electrical panel is in the “O” position;
POWER SUPPLY CABLES
- PROTECTION
(
see wiring diagram SECA ......... attached)
The electric power supply must not be supplied by a connected unit but by the nearest electric panel.
Check that the voltage and frequency of the power supply correspond to the data shown on the nameplate of the
dry cooler.
Connect the power supply cable to the isolator introducing the cable into the switch box through an IP 55 rated
cable gland and screw the terminals down tightly.
The table indicates main electric power supply data used for power supply cable dimensioning.
IMPORTANT: Install an electrical protection (circuit breaker of appropriate rating) upstream
the power supply, all safety legislations regarding the installation site must be respected.
START-UP
Switch on the power supply to the dry cooler and close the isolator (switch to position ‘I’).
On “P” version, the fan motor starts automatically when the liquid temperature reaches the preset value of the
speed regulator (factory set).
CONTROL DEVICES - ADJUSTMENT
The radiator is equipped with an optional fan speed control device consisting in either:
1. ON-OFF thermostat control (constructive version
S
);
2. Modulating phase cut-off control (constructive version
P
);
The control device is pre-set in the Factory.
Whenever the calibration must be changed, follow the instructions
below.
The
Rgf
series is a mains voltage regulation device based on the principle of the regulation or cut-off of the
phase and has been designed to adjust the active voltage according to a control signal. The device has been
constructed for industrial use and complies with EMC Standards for industrial surroundings.
Adjustment is made through the regulation of the voltage of the mains simple harmonic current input.
The
Rgf
series voltage regulator is composed of an electronic board installed inside a techno-polymer container
with IP55 Protection Rating.
The control section is found on the board's upper side, while the power section is positioned on its lower side.
опубликовано topclimat.ru
