Each condenser drain must be equipped with
a U-trap. The following conditions are essential
for correct operation:
1. At each drain a U-trap must be connected.
2. Several drains may not be connected to
one U-trap.
3. The water from the U-trap must run in a
funnel.
CONDENSATE DRAIN
4. Before starting, fill the U-trap with water.
5. The heights H1, H2 and H3 can be
determined from the maximum negative
pressure (p) and maximum pressure (p) in
the section of the U-trap or be determined
by the information on the technical data
sheet as follows:
• Total pressure pges = 1196 Pa
• Dynamic pressure pdyn = 83 Pa
• Total static pressure pstat = pges – pdyn =
1113 Pa
• 1 mmWS = 9,81 Pa
• H1 > 1113/9,81 = 114 mm + 15 mm
(Safety) = ca. 130 mm
• H2 = 65 mm
• U-trap intake side (in direction of airflow
before the fan), see Figure 54
• H1 [mm] > p [mm WS]
• H2 [mm] > p/2 [mm WS]
10 | ICEBOX FAN COIL UNITS IOM
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