Ferroli RXA, Technical Manual

Page: 19 / 20

19
CONNECTIONS
Electrical connections
The electrical wiring must be carried out by qualified personnel in conformity with the current regulations in the country of use at
the time of installation. Before carrying out any work on the electrical system make sure the unit’s power supply line is
disconnected at the start.
N.B. Refer to the wiring diagram attached to the unit.
Connection to the power supply
The units come completely factory-wired and arranged for connection to the mains.
The power cables of the unit’s supply line must be taken :
-
for units with single-phase power supply : from a single-phase voltage system provided with neutral wire and separate
earth wire;
V = 230 V ± 10 %
f = 50 Hz
- for units with three-phase power supply : from a symmetrical three-phase voltage system provided with neutral wire and
separate earth wire.
V = 400 V ± 10 %
f = 50 Hz
The power cables must enter the unit through the holes provided in the side panel and be connected to the unit’s main switch.
The earth wire coming from the power supply line must be connected directly to the plate on the electrical panel to ensure the
equipotential connections of all the metal earths and the structural parts of the unit. The cables must be integrally fixed to the
unit’s structure using the special cable clamp on the electrical panel.
IMPORTANT
The power cables must have a section adequate for the power absorbed by the unit and be sized in conformity with the current
regulations. For sizing of the power supply line, always refer to the unit’s total FLI and FLA values, taking into account any
accessories fitted.
Protection upstream
An automatic switch suitable for ensuring protection against overcurrents and indirect contacts must be installed upstream.
Coordination between the line and switch must be carried out in compliance with the current regulations on electrical safety,
regarding the type of installation and the installation ambient conditions.
Connections to be made by the user
The wiring board inside the electrical panel contains dedicated terminals for the following connections.
General alarm
Live output (230V - max 2A) to be used for signalling the presence of an active alarm.
Output active : alarms present
Output not active : alarms absent
Remote standby
A remote device for turning the unit On/Off (selector, programmer clock, centralised supervision device, etc.) with a voltage-free
contact suitable for switching loads of very low power can be connected.
This function must be enabled by means of parameter (see the section “Adjustment and control”) and has priority over settings
made from keyboard.
Remote cooling-heating
It is possible to switch between cooling mode and heating mode from remote by connecting a device equipped with a voltage-
free contact suitable for switching loads of very low power.
This function must be enabled by means of parameter (see the section “Adjustment and control”) and has priority over settings
made from keyboard.
Remote control
It is possible to connect a remote control that has all the control and display functions available on the unit’s interface and
therefore enable complete remote control.
Pump control
The unit’s controller can directly activate the circulating pump by means of a voltage-free contact (max. absorption 4A).
The manufacturer declines all responsibility for any inaccuracies in this manual due to printing or typing errors.