Split refrigeration units and heat pumps
AIRDUO SK/CK - SK/CP
Indoor coil Outdoor coil
Air intake conditions Minimum Maximum Minimum Maximum Refrigeration 14ºC WB 22ºC WB 12ºC 48ºC Heating 10ºC 27ºC -10ºC WB 15ºC WB
With condensation pressure monitoring activated, operation down to -10ºC.
Defrost management (on heat pump units). All-season operation using evaporation and condensation pressure monitoring. Control of the supply air temperature. Monitoring of the compressor discharge temperature via a sensor. Setpoint compensation based on the outdoor temperature. Hourly and weekly time schedule. Diagnostic of faults and general alarms. Number of starts and runtime counters for the unit components. Optional functions: 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. Control of electronic fans. Detection of fouled filters. Connection to a centralised management system (CMS) for supervision. 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 steel panels with polyester paint in RAL 7035 white. Free-standing frame.
Galvanised steel panelled casing with RAL 7024 graphite grey and RAL 7035 white polyester paint coating. Freestanding frame.
Outdoor air circuit
Two-speed axial fan(s) with direct coupling to the motor (high-speed models 90 to 182 are wired). Class F sealed motor, IP54 with internal heat protection. Dynamicallybalanced propellers and external protective grille. Coil(s) comprising copper tubing and aluminium blades. Two designs: - Models 90 to 320: U coil - Models 360 to 600: V coils Condensate drain pan (models 360 to 600). Scroll type hermetic compressor(s), with sound insulation, fitted on anti-vibration mounts. Direction of rotation and phase balance control. Crankcase heater (heat pump units). Thermostatic expansion valve(s) with external equaliser (heat pump units). Four-way reversing valve (heat pump units). 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. Monitoring 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. Transformer for power supply without neutral included in the electrical cabinet. Main earth connection. Compressor and fan motor assembly switches.
Indoor air circuit
Coil comprising copper tubing and aluminium blades. Centrifugal belt-driven fan. Electric motor(s) with tensioner, class F, IP55 and internal heat protection. Dual-inlet turbine(s), with wheel with forward curved blades. Maintenance-free, lubricated ball socket. Reusable air filters, mounted on a frame. Condensate drain pan. Thermostatic expansion valve(s) with external equaliser (retaining valve on ICK series). Main door switch.
Refrigeration circuit Security features
AVANT electronic control (models 90 to 182) / AVANT+ electronic control (models 200 to 600) This electronic module with microprocessor, comprising a control board and a TCO user terminal, provides the following functions: 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.