Komfovent Domekt CF 250 F, Installation And Service Manual

Page: 17 / 32

UAB KOMFOVENT we reserve the right to make changes without prior notice
D_20-07
17
4.1.1. Water trap installation for a unit section mounted on the suction side
Since the fans in most air handling units are last in the chain of functions and generate sub-atmospheric
pressure inside the unit,it is very important to correctly install the water trap. Because of that reason conden-
sate can be hardly eliminated from the air handling unit and the technical premise may get covered with con-
densate. Height H
1
must be at least equivalent in mm to half of the negative pressure inside the unit in mm water
gauge. Height H
2
must be at least equivalent in mm to the negative pressure inside the unit in mm water gauge.
Ø 32
25-240
106
DN 40
95
H
1
, H
2
140-310
Condensate Condensate
H
2
H
1
Precaution : The drainage siphon should be mounted on the outlet fit -
ting pipe of every drip tray for complete condensate drainage from the air
handling unit and prevention of penetration of offensive odours from an
effluent into the ventilation system.
In case of the outdoor operation of the air handling unit, the siphon and
the bleeders should be heated with an electric thermal cable (if ambient
air temperature t
amb
< 0 °C). The siphon and the bleeders should be heat-
insulated with an insulating material.
4.1.2. Water trap installation for a unit section mounted on the pressure side
Since the fans in most air handling units are not last in the chain of functions and generate over-atmos-
pheric pressure inside the cooling section. In such case the consisted condensate can be easily removed
from AHU and there will be no strict requirements for siphon‘s installation. A drainage siphon is enough with
a minimum rake.
RECOMMENDATION: The drainage siphon must be installed in connection with not less size pipe diam-
eter.
Any drainage systems must not be connected directly to the municipal sewage system. The condensate
tray shall be easily accessible for cleaning and disinfection.