Height of drain trap
NOTICE!
Risk of leakages due to incorrect installation!
Do not connect the condensate drain to the sew-
erage system without a drain trap or with an unsuit-
able drain trap as this may result in air getting into
the AHU.
–
Use the AHU only with a suitable drain trap.
–
Do not connect the drain trap to the drainage
pipe; the water from the drain trap should flow to
a gully.
–
Use a different drain trap for each condensate
drain. Do not connect condensate drains with
each other.
–
A distance from the floor must be maintained at
the drain trap of the negative pressure side.
Calculate the height of a drain trap as shown below.
Symbol:
P
- Pressure inside the air handling unit [Pa]; be
sure to use a positive value for calculations;
take the final differential pressure (filter etc.)
into consideration
1.5
- Safety factor to compensate for pressure fluc-
tuations in the system such as those resulting
from rapidly closing dampers (applies only to
positive pressure)
GR
- Base frame height [mm]
R
- Distance R [mm]; minimum distance between
condensate drain (centre line) and floor on the
positive pressure side.
X +
60
- Distance X + 60 [mm]; minimum distance
between condensate drain (centre line) and
floor on the negative pressure side
H
- Distance H [mm]; minimum distance between
base frame lower edge and floor
A
- Distance A [mm]; distance between base frame
lower edge and condensate drain (centre line);
depends on the base frame height (GR) and
unit width (B), see table
B
- Unit width (B)
Distance A
GR
Unit width
B
≤
2448 [mm]
B > 2448 [mm]
A
A
110
47
32
200
137
87
300
237
187
Negative pressure (extract air)
Fig. 24: Drain trap for negative pressure
Calculation to be used for negative pressure (2900 Pa
max.):
X = P / 10
X+35 has to be at least 140 mm
H = X + 60 – A
Calculation example for X-CUBE:
Given data:
P
- 1800 Pa
GR - 110 mm
B
- 1500 mm
A
- 47 mm, see table
X = 1800 Pa / 10 = 180 mm
H = 180 + 60 – 47 = 193 mm
Installation
Sizing and connecting the condensate drain
Air handling unit X-CUBE Ex
35
Содержание X-CUBE Ex
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