• Allows maintenance of the circuit
• Allows "partialised" working of the unit
Possibility of enabling/disabling the individual compressor
• Maintenance of the individual compressor
• Malfunction
Complete management of pump down function:
• With dedicated pressure switch
• Timed
• Via the low pressure switch
• Via the low pressure transducer
Circuit unloading function:
• From evaporator inlet high water temperature
• From condenser inlet high water temperature (unit with heat recovery) – Not Available
• From high condensing pressure
• From low evaporating pressure
Controlled loads maintenance signal function:
• Compressors
• Evaporator pumps
• Condenser pump
Circuit auxiliary relay function:
• Four completely configurable relay outputs, also released from normal working of the unit controlled,
managed by means of NTC or PTC temperature probes or with 4÷20mA – 0.5 Volt pressure transducer
Weekly working in energy saving mode:
• Up to three daily time bands (devices with RTC option)
• From digital input
Weekly working with automatic switch on and switch off:
• Up to three daily time bands (devices with RTC option)
Dynamic set-point function:
• Managed by NTC or 4÷20mA input
Changeover function:
• Automatic changeover between cooling and heating by NTC input
Remote OFF function:
• From configurable digital input
Remote heating cooling function:
• From digital input with configurable logic
Hot start function:
• Air/air unit
Defrost management:
• In temperature in pressure or with both (combined control)
• Forced defrost for start-up with low external air temperatures
• From digital input or timed
• Manual using the relevant key
Boiler function:
• With integration heaters
N° 2 outputs for the proportional control of the condensing fan speeds via external module (inverter
or single/three phase phase cut) with configurable signal:
• PWM
• 0÷10 Volt
• 4÷20 mA
N° 6 outputs for 0÷10V proportional or ON/OFF control
• To control the servomotors working in free cooling or heat recovery mode
• For driving an external relay
Complete alarms management
• With internal data logger alarms (up to 100 events)
Up to n° 2 programmable remote LCD terminals with customisable values display
• with NTC probe on board for room temperature display and temperature control (Not Available).
Supervision/tele-assistance/remote monitoring for complete control and supervision from local and
remote
• By means of network output with ModBus TCP / IP protocol (INTERNET / INTRANET)
• Directly by telephone line (MODEL WITH INTERNAL MODEM)
• Indirectly by means of GSM modem or XWEB serial modem (MODEL WITH RS232 OUTPUT
PREPARATION)
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