The EXPERT NANO 4CK is a 4 relays electronic thermoregulator designed to control refrigerated counters, display windows and static or ventilated refrigeration units with off-cycle or electrical defrosting in real time (RTC). It is fitted with three analogue inputs for NTC temperature probes, one of which is configurable as a digital input, an additional digital input, four relays for the compressor control, fans, defrosting function and alarm and buzzer. As option the connection to an echo temperature repetition.

Main characteristics
• Can be configured for hot, cold or neutral zone applications.
• Can be configured for managing day / night (automatic modification of the setpoint for energy saving) activated by time mode (real time clock) or by means of the digital input.
• Can be configured to manage two evaporators with dual temperature sensor for defrost termination.
• Defrosting can be configured for off-cycle, heating element or cycle inversion and frequency and durationcan be set. End-of-defrosting can be based on time or temperature.
• Clock for programmed defrost (RTC).
• Relay for controlling the compressor, evaporator fans, defrosting resistance and alarm (defrost and alarm outputs can be configured like light output).
• Key operated manual START/STOP defrosting.
• Key operated ON/OFF.
• Cold room light ON/OFF switch with key or by means of door switch (if one output is configured like cold room light).
• Display/adjustment of temperature with decimal point.
• Internal buzzer for acoustic signals.
• Flat front surface for easy cleaning and keys of ample dimension which can be customized with various colours (on request).
• High brightness display with increased icons and figures.
• PEGO programming philosophy guaranteeing immediate start-up.
• IP65 front protection. Two-fold fastening options: clips / screws.
• Extractable terminals.
• RS485 serial connection with Modbus-RTU or Telenet protocol.
• External transformer (optional).
• Temperature repeater (optional).