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VTS reserves the right to implement changes without prior notice
Ventus Air Handling Units
1)
humidifying pad
2)
Ø10 coupling
3)
water supply for humidifying pad (High
pressure nylon hose Ø10mm)
4)
DN15 supply connection
5)
humidifier control box
6)
supply pipe
7)
water filter
8)
cut-off ball valve
9)
outlet connection DN25
10)
pump
11)
control valve
12)
relief valve
Fig.15. Evaporative humidifiers
a) Direct drain type VS 21-55
b) Circulating type VS 75-650
Connection for the water supply and water drainage should be done without mechanical stresses
which might result in mechanical damages or leakage. Each humidifying unit is assembled with
necessary external piping and tested for water tightness prior to delivery.
The supply system should provide normal quality tap water without excessive deposits of dirt and
other particles which could lead to excessive dust build-up on the surface of humidifying pads.
Evaporative humidifiers don't require any special water treatment before feeding the device.
Nevertheless a cut- off ball valve and strainer-type filtering device accessible for cleaning should be
installed on the supply piping (not included in delivery).
AHUs with humidifiers are supplied with a control cabinet to be installed outside the AHU. Control
box installation site must be protected from weather and to ensure temperature in the range from 5°C
to 40°C.
Direct drain humidifiers connect directly to the cabinet with a using a high pressure nylon hose
Ø10mm (supplied with a humidifier). To connect use the supplied Ø10 coupling. Make a hole in the
panel for the crossing humidifier supply pipe. Pipe in the hole protect with a header glands.
In the similar way connect water supply to the control cabinet.
If necessary, the pipe between the humidifier and control cabinet can be extended but not more than
5m.
For the humidifier with water circulating VS 75-650 powering-water should be connected to the
connection pipe (DN15) led out outside the inspection panel.
Types of the supply and drainage connection are specified in the table 5.
