Tandem Condensing Unit

RX35CX is a controller suited to control small and medium condensing units. It is able to manage up to two compressors (standard ON/OFF, digital scroll or inverter-controlled), and up to two ventilators (standard ON/OFF or modulated type). Moreover, the supported modulating ventilators can be both electronic ventilators (which use a 0÷10Vdc command signal) and ventilators controlled in phase-cut mode.

The RX35CX is characterized by its versatility; in fact, it can be used both in “entry level” condensing units (one compressor and one ventilator) and medium condensing units (up to 2 compressors whereof one with variable capacity). Specific functions for the regulation optimization, for the control of malfunctioning status and for the energy saving, make this controller one of the most completed and reliable for the customer.

Main features:

• Two relay outputs to drive ON-OFF compressors of ventilators, or for alarm signaling;
• One TRIAC output for ventilator speed modulation in phase-cut mode (MAX 300W)
• One analogue output (0-10Vdc or PWM type) for electronic ventilators control, inverter management or proportional repeater
• Up to 2 digital inputs free of voltage for external alarm management
• Two analogue inputs to be used with ratiometric pressure transducer (0.5-4.5Vdc)
• Up to 3 temperature probe inputs NTC10k, NTC50k or PT1000 type
• RS485 serial network connection to remote supervisor and cloud systems (Modbus RTU);