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3.6 Storage
The delivery sections generally are packed in nylon. This package is suitable to protect the AHU
during loading and unloading from bad weather, but not for outdoor storage. The insertion into a
dry area after unloading is therefore essential for the preservation of the unit.
Standstill maintenance
Prolonged standstill times can cause damage on motors, fans or pumps.
To avoid damage on to bearings, the rotors should be moved manually a few turns about once per
month. If the period between delivery and commissioning is more than 18 months, then the bearing
must be replaced. Also components such as belts must be checked and if necessary replaced.
Entfernen der Nylonverpackung
Remove the nylon packaging after delivery and place the units in a dry, weather
protected area: the risk of corrosion due to the lack of ventilation in combination
with a higher humidity under the nylon packaging is present – e.g. white rust may
be formed within a short time on galvanized surfaces. It can further arise an exces-
sively high temperature under the packaging, which can also cause damages at the
components.
If
you want to give pleasure to yourself, the planner, the owner and other observers of the AHU
then
we strongly recommend to cover and protect the unit against dirt and damage during the installa-
tion and commissioning, see Figure 23.
4
Foundation / erection
Space requirements:
At the location, proper maintenance and the removability of build in components shall be physically
possible. Therefore a free working space of unit width + 300 mm shall be available. On the back
site for mounting a 600 mm width passage should remain free.
According to EN 13053 and VDI 3803 it is not permitted, that the bottom of the AHU replaces the
building roof. Furthermore it is not permitted that the AHU takes over any function of the building,
neither in terms of tightness nor insulation.
Figure 23: Protection against dirt
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