references
Roof top
SPACE PF 90 - 360
Free cooling management Running the unit in free cooling mode allows it to make best use of outdoor air conditions when these are more favourable than the return air conditions. This allows the cooling capacity to be reduced. Note: the free cooling function is never activated at the same time as the recovery circuit. The percentage of outdoor air can vary between 0% and 100%. Three options are available for free cooling management: Thermal, by comparing the temperatures. Enthalpic, by comparing the enthalpies. Thermo-enthalpic, by comparing the enthalpies and correcting for temperature. This is the optimum solution as it takes the variability of the climate into account. A dedicated recovery thermodynamic circuit, with independent control, adapted for air change requirements to improve the COP and EER of the whole unit. EC plug fan or centrifugal fan (MRC0 or MRC1 assemblies). Air circuit composed of copper tube coils and aluminium blades. Thermostatic expansion valve with external equaliser. Hermetic scroll compressor with acoustic insulation, fitted on anti-vibration mounts. Crankcase heater. Four-way reversal valve (heat pump units). Acid-resistant dehumidifier filter. Condensate drain pan.
return
recovery on extracted air
Specific humidity W (g/kg dry air)
Thermal free cooling
extraction
new air
Dry temperature Td (°C) Specific humidity W (g/kg dry air)
Enthalpic free cooling
main circuit supply
reversible recovery circuit
Dry temperature Td (°C)
ic thalp o-enng therm oli With free co
Specific humidity W (g/kg dry air)
Soft start for supply air fans and/or return air centrifugal fans (optional), increasing the warm-up time, mainly intended for installations with textile ducts. Required for motors of 15 kW and above. Differential pressure switch to detect fouled filters. Differential pressure switch for checking the air flow, for centrifugal fan (optional). Smoke detection unit compliant with the NF S 61-961 standard. Refrigerant leak detector with measuring sensor.
Thermo-enthalpic free cooling
ergy re en es mo Sav
Dry temperature Td (°C)
518
HEAT PUMPS - AIR CONDITIONING - REFRIGERATION - AIR HANDLING - HEAT EXCHANGE - NA 17.01 A