Setting Up
76
6.9.2 Waste air system (only air-cooled version)
The installation of an exhaust air ducting requires an additional axial fan in the
exhaust air channel. With the exhaust air quantities given, the axial fan
compensates the pressure loss of the installed exhaust air channel
Please observe the following points:
• It is recommended to have a specialised company install and design the
exhaust air ducting (channel and axial fan) or to contact technotrans.
• The additional axial fan must be connected in parallel with the refrigeration
unit fans (observe electric circuit diagram).
• Provide a weather protection grid so that the refrigeration unit will be
protected against the ingress of cold outside air. This avoids low-pressure
trouble.
Fig. 30: Installation example
1 Exhaust air channel
2 Opening in ceiling
3 Axial fan
4 Exhaust air hood
5 Unit with air-cooled condenser
6 Shield grid
7 Opening in wall
Note
Make sure that there is no external back pressure when connecting
an exhaust air hood.
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