
Mechanical installation | 6
Operating instructions CMVpro 125-400 | Version 1-en
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Fig. 28:
Proper position of the casing drain
The casing drain shall always be located at the lowest point of the fan housing’s
current mounting position.
When mounting as a retrofit, an opening for the casing drain shall be cut in the
splinter protection.
• Weld drain pipe (outer diameter 0.8 in) to casing drain (type V)
_
24].
• Connect drain pipe to siphon.
6.9.1
Siphon calculations and execution
Required siphon height and installation height
h
h
H
2 H
Fig. 29:
Siphon height and installation height
Calculation formula with
SI-units:
Legend:
h = min. siphon height [mm]
p
stat
= static fan pressure [Pa]
H = installation height [mm]