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Technical System Catalogue Climate Control

Cooling units Selection criteria Enclosure climate control places ever greater demands on What type of ambient pollution, such as dust, oil and integration and adaptation to the local conditions and the chemicals, are the cooling units exposed to? existing process control and monitoring system. Rittal offers For bayed enclosure suites, the output irradiated from the right solution to suit every requirement. neighbouring units may also need to be taken into account. When selecting the appropriate cooling unit for your enclo- sure, please observe the following points: Good ventilation should be ensured at the site of installa- tion (for example, the heat dissipated by the cooling unit What is the installation type to IEC 890? may cause a significant rise in the temperature of small (see page 5, calculation bases) rooms). What ambient conditions are anticipated (max. ambient Particularly with poor ambient conditions, such as dirt or temperature and humidity)? small, unvented rooms, air/water heat exchangers should What is the required maximum internal temperature of the be used. enclosure Ti? What is the heat loss from electronic components inside the enclosure? Is there a requirement regarding the protection category to EN 60 529/IEC 529? Appropriate use of enclosure cooling units In order to ensure the proper use of enclosure cooling units, 7. The enclosure must be sealed on all sides (IP 54). the following points should be observed: 8. The air inlet and outlet openings in the internal circuit of 1. The unit must only be installed and opened by author- the cooling unit must not be obstructed. ised, expertly trained personnel. 9. The cold air flow should not be pointed directly at elec- 2. Choose a location for the cooling unit which ensures tronic components, to prevent the formation of conden- excellent ventilation. The site must be free from exces- sation. sive contamination and moisture. For example, the 10. The unit must only be installed horizontally, in accord- atmosphere must not contain any conductive dusts or corrosive media. ance with the prescribed installation position. The maxi- mum permissible deviation from the horizontal is 2°. 3. The mains connection data (connection voltage and fre- quency) specified on the rating plate must be observed. 11. After disconnecting from the supply voltage, the cooling circuit of the cooling unit must not be switched back on In the case of 400 V, 2~ cooling units, we recommend for at least 5 minutes. the use of transformer circuit-breakers, and for three- phase units, the use of motor circuit-breakers is advis- 12. The customer must not make any modifications to the able. cooling unit. 4. The prescribed electrical protection devices must be 13. The heat loss of the components installed in the enclo- connected upstream of the unit. No additional tempera- sure must not exceed the specific useful cooling output ture control may be connected upstream of the unit at of the cooling unit. the supply end. The pre-fuse specified on the rating 14. The installation instructions contained in the cooling unit plate should be provided as line protection. Observe manual must be observed in full. the locally valid regulations when installing. 5. Where a door contact switch is used, a shielded cable should be used in environments with increased levels of electromagnetic interference. 6. The temperature range specified on the rating plate must be observed when operating the cooling unit, both indoors and outdoors. Technical System Catalogue/Climate control 3 - 18


Technical System Catalogue Climate Control
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