Split refrigeration units and heat pumps
AIRDUO NEXIA SP/CP - SP/CK
Indoor coil Outdoor coil
Outdoor unit SP
Air intake conditions Minimum Maximum Minimum Maximum Refrigeration 14ºC WB 22ºC WB 12ºC Heating 10ºC 27ºC -10ºC WB 15ºC WB
Centrifugal fans or plug-fans (optional)
With condensation pressure monitoring, operation down to -10ºC.
Indoor unit CP
Operation during “all seasons” via the condensation pressure control by damper The SP unit can incorporate a return Indoor air quality using different combinations of gravimetric and Free-cooling module (optional) with built-in plug-fan and posibility of cooling recovery circuit
Selection of the operating mode: COOLING, HEATING, AUTOMATIC, VENTILATION and DEHUMIDIFICATION. Modification of the setpoint. Continuous monitoring of operating parameters. Display of values measured by the sensors. Compressor time delays. Display of alarms by means of codes Intelligent defrostmanagement (on heat pump units). Control of the supply air temperature. Control of the compressor discharge temperature via a sensor. Setpoint compensation based on the outdoor temperature. Control of the ambient temperature thanks to the probe incorporated into TCO terminal. This probe can be replaced by an return or ambient probe that would be installed in the control board. Hourly and weekly time schedule. Diagnostic of faults and general alarms. Number of starts and runtime counters for the unit components. Humidity control. Free cooling heat management. Thermo-enthalpic and enthalpic free cooling management (with AVANT+ version only). Control of the minimum opening of the outdoor air damper. Control of auxiliary electrical heaters. Proportional control of an auxiliary hot water coil. Detection of fouled filters. Connection to a centralised management system (CMS) for supervision. Anti-fire safety This control can include a pGD1 terminal for maintenance as an option, which facilitates initial programming of the unit, modification of operating parameters and a description of alarms which are produced.
Casing made of galvanised sheet steel panels with polyester paint in RAL 7035 white. Free-standing frame.
Outdoor air circuit
Centrifugal belt-driven fan. Electric motor(s) with tensioner, class F, IP55 and internal heat protection. Dual-inlet impeller(s), with wheel with forward curved blades. Maintenance-free, lubricated ball socket. Coil(s) comprising copper tubing and aluminium blades. Condensate drain pan. Scroll type hermetic compressor(s), fitted on anti-vibration mounts. Direction of rotation and phase balance control. Crankcase heater. Thermostatic expansion valve(s) with external balancing (heat pump units). Four-way reversing valve. Particle separator(s), acid-resistant dryer filter(s) and liquid tank(s). Weldable refrigerant connections. Maximum equivalent length of the refrigerating line is 50 m (for greater distances, use an oil separator). High and low pressure switches. Control of the compressor discharge temperature. Anti-return valve integrated into the compressor. Main door switch. Thermal-magnetic protection for the compressor and fan motor supply line. Automatic control circuit switch. Complete electrical cabinet, fully wired. Insulated vertical unit cover to prevent condensation. IP55 protection. Power supply with neutral. Main earth connection. Compressor and fan motor assembly switches.
AVANT electronic control (models 90 to 182)/AVANT+ electronic control (models 200 to 485) This electronic module with microprocessor, comprising a control board and a TCO user terminal, provides the following functions: 574
HEAT PUMPS - AIR CONDITIONING - REFRIGERATION - AIR HANDLING - HEAT EXCHANGE - NA 17.01 A