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Figure 59: Drain valve
6.2
Drain for condensate and excess water
Each drain must be equipped with a siphon. Siphons are available as accessories from TRANE.
6.2.1
Standard siphons
A space-saving design of the necessary siphon height can be completed by TRANE on request.
Contact your sales representative for detailed information.
The following conditions are essential for correct operation:
-
At each drain a siphon must be connected.
Several drains may not be connected to one siphon.
-
-
The water from the siphon must run in a funnel.
Before starting, fill the siphon with water.
-
In the case of outdoor AHUs, an antifreeze mechanism has to be provided on
-
site.
The heights H1, H2 and H3 can be determined from the maximum negative pressure (p) and maxi-
mum pressure (p) in the section of the siphon or be determined by the information on the technical
data sheet as follows:
Total pressure
Dynamic pressure
Total static pressure p
1 mmWS = 9,81 Pa
H1 > 1113/9,81 = 114 mm + 15 mm (Safety) = about 130 mm
H2 = 65 mm
Siphon on suction side (in direction of airflow before the fan), see Figure 61.
H1 (mm) > p
(mm WS)
H2 (mm) > p/2 (mm WS)
V07-19.0
p
ges
p
dyn
= p
– p
stat
ges
dyn
Figure 60: Vent valve
= 1196 Pa
= 83 Pa
= 1113 Pa
37/115
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