Active Cooling - Cooling units



Roof cooling unit ETE. Specially designed for the installation to the top of the cabinet.

For active temperature management, we offer high-quality STULZ- Cosmotec A/C units under the Tritón brand. These A/C ETE units are designed for cooling the equipment in individual data cabinets (RDE and RIE cabinets with IP54 protection). These A/C units are intended for both industrial and office environments. These are compact units that extract the heat produced by the technology from the cabinet and transfer it to the immediate surroundings. Therefore, no ducting or other piping is needed, but on the other hand, sufficient air exchange in the area around the cabinet must be ensured.

The A/C unit consists of two separate air circulation circuits:

1. The inside circuit, which cools the installed equipment and enters the A/C unit, where the hot air is transferred to a cooling medium,

2. The cooling circuit with a compressor, which is cooled by a stream of ambient air.

Due to this arrangement, the ambient air is not mixed with the air from the inside of cabinet, and thus the humidity inside the cabinet is not affected. With improper settings of the unit, the excess humidity can condense on the equipment or can freeze inside the cooling unit, which can lead to its malfunction. It is therefore necessary to set up the A/C unit correctly and consider the ambient temperature and humidity. It is also possible to equip our data cabinet with a door sensor, which automatically shuts the compressor off when the door is opened. 

The A/C unit is equipped with an electronic controller, which can be easily installed in two different positions on the unit cover. This, together with the appropriate installation adapters for the cabinets, makes it possible to mount the A/C unit in a position where it can draw in the hot air and blow out cold air along the side panels or it can be installed in the front/rear orientation according to the customer’s requirements.
For the A/C to function properly, it is necessary to provide a sufficient ambient air circulation and its appropriate temperature. For more information, please refer to the manual of the respective A/C unit.


To fully utilize the potential of the A/C units by directing the cooling air precisely according to the needs of installed technologies, we supply installation adapters for RDE and RIE cabinets. This is a metallic panel which is screwed to the large-sized opening at the top of the cabinet where the installation of A/C is required. Adapters are symmetric, which means that rotating is simple. All sizes of the adapters are shown in the table below. For easy access to the controlling panel, it is possible to install it in two positions by simply plugging it into the connector (see installation manual).

Cooling units 800 mm wide can be mounted on cabinets 800 mm wide only.
Cooling units 600 mm wide can be mounted on cabinets 600 mm and 800 mm wide.

Operating conditions:

The ETE A/C unit is designed to work in a horizontal position as a roof unit for free-standing cabinets. It is also necessary to transport the unit in a horizontal position and install it accordingly. We offer adapters for installation on RDE and RIE data cabinets, which seal the A/C unit at the cabinet body and would also direct the cold air flow inside the cabinet. The units contain a drip tray, which collects condensation from the cooled space. Should there be an increase in condensation, (which can happen with higher air humidity, lowered temperature inside the cabinet, the door left open, etc.) it is necessary to install a safety condensate draining pipe and follow the mounting instructions described in the attached manual.

Operating environment:

Min. ambient temperature in the working condition: +20 ºC
Max. ambient temperature in the working condition: +50 ºC
Adjustable temperature range: 25 – 45 ºC


With regard to the demand of a maximum life-time of the unit’s equipment, those are the recommended parameters of the inner environment of the cabinet.
Temperature limits: from +10 till + 40 ºC
Relative humidity: 30 – 90 %
Surface temperature of the inner equipment of the cabinet should not fall below the condensation temperature.

The A/C unit can be installed on cabinets in such a way that it provides the required amount of cold air for the equipment being used.

There is an opening located at the top of the RIE and RDE cabinet, which requires the installation of an adapter. An appropriate reduction can set the right direction of the A/C unit and it also sets the stream of the hot/cold air along the sides or along the front/rear sides of the cabinet.

Warranty 12 months.

RAC-KL-ETE-X1 RAC-KL-ETE-X2* RAC-KL-ETE-X3 ** RAC-KL-ETE-X4 ** RAx-RV-X66-Z6 RAx-RV-X68-Y6 RAx-RV-X68-Z6 RAx-RV-X61-Y6 RAX-RV-X61-Z6 RAx-RV-X61-Y8 RAx-RV-X88-Y6 RAx RV-X88-Z6 RAx-RV-X88-Z8 RAx-RV-X81-Y6 RAx-RV-X81-Z6 RAx-RV-X81-Y8 RAx-RV-X81-Z8