CRAH System


Canovate’s Computer Room Air Handlers (CRAHs) are designed for use in data centers, data processing rooms, telecom centers, and other applications where keeping thermo-hygrometric conditions constant year-round is important to ensuring the correct operation of electronic devices.

Thanks to their technologically advanced design, these close control units control the ambient temperature with remarkably high precision and, when humidity requires, adapt their cooling capacity to meet the room’s requirements. This is all managed automatically by the on-board microprocessors. The high technology employed during their design, together with the use of the best components available, make these units extremely reliable when operating continuously. These units can be installed easily in small spaces, and are accessible from the front side for service and maintenance. Assembling and testing are done in the factory.


Technical Features:

The unit’s enclosure is supported by a rigid frame and manufactured from galvanized steel, making the structure strong and suitable for extreme transport and handling conditions. The external panels, fixed to the frame with quick opening connections, are made of pre-painted steel sheets (RAL 9005), ensuring long-term durability. They are internally insulated with class 1 sound-proofing material, in conformity with international regulations, reducing the overall sound level of the unit and allowing an air-tight seal. All the front and side panels can be
dismantled to allow an easy access to the main components.

Our units’ EC centrifugal fans:

*  Are made with backward curved blades of high-performance composite materials

*  Are directly coupled to a three-phase electrical rotor with IP54 protection

*  Continuously regulate their speed by means of 0-10V signals sent and integrated to the control

*  Are fixed on supports that reduce the transmission of vibration to the frame

*  Have statically and dynamically balanced impellers with long-life bearings

*  Our EC fans also ensure a lower electrical absorption and sound level, when compared to traditional centrifugal fans. Adjusting their air flow to the head pressure requested on-site is possible.

The chilled water coils, manufactured with copper tubing and aluminum fins, are sized with a wide exchange surface and a low air crossing speed. This allows remarkable heat exchange, and reduces the pressure drops on the air side. They are equipped with purging air valves, three-way modulating valves with servomotors, and are electronically controlled.

The condensing drain tray, made of corrosion-proof stainless steel, is placed underneath the evaporating coil with a flexible pipe for condensing water discharge.

The water circuit’s pipes are entirely coated with insulation, and have a 3-way valve with modulating control and temperature probe. The electric board is in compliance with CE norms, protected by a panel that is separated by the air flow.

Canovate’s CRAH units have adiabatic humidity pads to adjust the humidity level of incoming ambient air. This yields an even more efficient cooling process, that costs 30% percent less energy than competitor models.

An air economizer option is available for ambient air temperatures below 24°C (75°F) so that ambient air is filtered and supplied directly inside the datacenter room. Thus, there is no need for connected chillers to operate.



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