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It is important, to tight initially the bolt connection at the base frame. This is to en-
sure an exact connection of the AHU parts.
Figure 28: Bolt connection base frame
5.1.4
Special features for roof AHUs and device separations at wet areas
For roof AHUs as well as at device separations directly before or after a wet area (e.g. cooler), spe-
cial actions for sealing the AHU must be carried out:
1. The sealing agent (Sikaflex) has to be applied instead of the sealing strip across the whole
flange of the AHU, 5 mm from the inner edge (see Figure 31). Immediately thereafter, the rele-
vant delivery sections have to be joined together and then bolted.
2. If the AHU separation is accessible at the inside via a door (see Figure 32), then the joints
(Figure 33) have to be closed over the entire outline with the supplied sealing agent (Sikaflex)
after bolting together the delivery sections.
Note: To prevent leaks, these actions shall also be performed when extreme operating conditions
are expected or wet cleaning is planned!
Figure 30: Sealing surfaces
28/115
Figure 29: Bolt connection angles
Figure 31: Sealing the frontal joints
V07-19.0
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