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INSTALLATION OPERATIONS AND MAINTENANCE MANUAL - RXC/Hi SERIES
2.5 Electric box
The electric box is manufactured according to IEC 204-I / EN 60204-I standards and complete with door block disconnector,
CE insulation transformer. All motors and auxiliary circuits are protected against overload and short circuits by fuses
and/or circuit breakers. The electrical panel also includes the following components: General alarm contact, remote control
ON/OFF, summer/winter seasonal changeover contact, outdoor air temperature probe, supply air temperature probe, return
air temperature probe, recirculation air probe, defrost recovery probe, source exchanger defrost probe, pressure switches
for supply and return dirty filters.
2.6 Control system
The unit is complete with adjustment by means of a microprocessor electronic board with dedicated software and external
LCD display as user interface. Through the external or remote LCD display it is possible to set all the working set-points of the
unit and to visualize the operating states and possible alarm conditions present. Through the values acquired by the room
and air supply temperature probe, temperature control will be managed by activating the compressors with reference to the
winter and summer set-points. The unit can manage the automatic change of the room cooling or heating modes, the free-
cooling and free-heating conditions through the comparison with the fresh air temperature.
The heat capacity delivered by the heat pump unit will be continuously modulated through the speed variation of the inverter
refrigeration compressor. This variable mainly depends on the value of the supply air temperature with reference to the
fresh air conditions. This characteristic allows the operation at partial loads with a much higher energy saving compared to a
traditional group equipped with ON/OFF compressors.
2.7 Fans
Independently controllable, they consist of aerodynamically balanced, statically and dynamically balanced backward blade
centrifugal impellers with aerodynamic profile, made of galvanized steel. The impellers are directly coupled to brushless EC
brushless motors, with external rotor, operating via a 0-10V PWM or MODBUS-RTU modulating signal.
2.8 Additional coils
(external module)
External module that can accommodate heating and/or cooling coils with a high number of rows. The module can also
accommodate combined coils (water cooling, water and / or electric heating).
2.9 Test
Units are fully assembled and wired at the factory and subjected to a complete functional test before shipment. They are
manufactured in compliance with the safety standard of the Machinery Directive 2006/42/EC, the Low Voltage Directive
2006/95/EC, and the Electromagnetic Compatibility Directive 2004/108/EC and therefore complies with the "Health and
safety requirements" prescribed. Units are provided with CE markings, certificate of conformity, user and maintenance
manual.
2.10 Packing
Units are supplied on thick wooden pallets and wrapped in plastic film to protect against impacts during transport and
handling on site.
