Precision air handling cabinets
Support base for discharge into raised floor • low version (225-320 mm) • high version (320 to 525 mm) Supply plenum Acoustic plenum with noise trap Motorised intake damper Fire thermostat Hydraulic connection kit (chilled water and hot water coils) LON gateway. Changeover thermostat (only for CW) Raised floor pressure management (only for CW)
Description of external unit (DXA model)
CL2 type air condensing unit Supply: 400 V / 3-Ph / 50 Hz + N + E SCROLL hermetic compressor HP and LP safety pressostats Isolating and adjustment valves 1 cooling circuit Refrigerant: R410A Condensation pressure adjusted by electronic circuit board and pressure sensor. Speed variation on condenser fan Faults signalled to internal unit
Operation linked to fan Two-stage control (3 kW electric heater excepted) Two-stage or TRIAC control on EXPAIR Two high limit safety thermostats, automatic and manual reset
Immersed electrode humidifier with CPY board for feeding back information relating to the humidifier directly to the CIAT μAir CONNECT2 PLC: • Stainless steel electrodes with large surface area • 3 kg steam per hour rated flow rate < 3000 m3h • 8 kg steam per hour rated flow rate > 3000 m3h • Steam cylinder contained in one easily-removable item
Hot water coil
Coil with one row of copper tubes and aluminium fins. 2- or 4-way control valve fitted and connected. Optional connection hoses.
• Filling solenoid valves • Drain pump • Electronic circuit board controlling operation. • Diffusion jet • Water supply connection kit Only operates on mains water (conductivity 350 to 1250 μS/ cm, hardness 13 to 30°F), non demineralised or softened water
Control and supervision of units
CIAT μAir CONNECT2
1 4 7 .
2 5 8 0
3 6 9 -
- 160-character display containing instruction manual, operating reports, faults and corrective actions. Configurable PLC - Two fault levels - Operating time counter - RS 485 output using JBus or ModBus protocol - Master/slave type management possible. (Backup, rotation and additions between the units). - Optional LON gateway (only for CW). - Optional changeover thermostat (only on CW) - Optional raised floor pressure management (only for CW) 436
HEAT PUMPS - AIR CONDITIONING - REFRIGERATION - AIR HANDLING - HEAT EXCHANGE - NA 17.01 A