11
4.3.2. Hydraulic connections for cell block or spray
nozzle humidifiers
The hydraulic connections must be arranged so as to
permit easy extraction of the evaporating block or the
distribution ramp.
The drain and overflow must be fitted with a siphon a not
connected directly to the drainage system pipe (section
4.4.). This operation is extremely important in order to
prevent tank overflows and resulting flooding of the unit
and the site of installation.
We recommend you install the following devices on the
hydraulic connection to the mains:
- a filter
- a pressure gauge
- a flow control valve that also allows exclusion of the
humidification system.
4.3.3. Humidification with cell block
Prior to start-up, check that the cell block is correctly
installed (section 6.4.2.).
At first-time start-up, check that the cell block is evenly
wetted; if you observe water jets on its surface, restore
the regular water flow by means of the tap.
4.3.4. Humidification with circulating pump
To avoid damaging the pump at first-time start-up, check
that:
- The hydraulic connection has been made properly, in
accordance with prevailing regulations
- The tank is clean and free of any residue resulting from
installation that could cause its blockage
- The water level inside the tank is kept at 20-30 mm
below the overflow.
Should a situation arise in which there is no water in the
tank, the pump motor would overheat and be irreparably
damaged. Conversely, if there is too much water in the
tank, an overflow may result, leading to flooding of the
unit and the installation room.
4.3.5. Ultrasonic,
steam
(submerged
electrodes),
compressed air humidification
For Air Treatment Units with the above-listed types of
humidification, you should consult the MANUAL supplied
with the humidifier.
4.3.6. Steams humidifier with submerged elements
In order to make the system operational, you must:
- Connect up the element electrically in accordance with
prevailing standards
- Connect the humidifier to the mains network; an on-off
valve must be included to exclude the humidification
section from the line
- Connect the overflow to the drain to prevent flooding in
the case of float malfunction.
Before starting up the humidification system, you must:
- check the proper operation of the microswitch which, in
order to protect the element, interrupts the flow of
current when the water level drops below a permitted
level.
- check the setting of the float to prevent the overflow of
water from the tank.
4.4
DRAINAGE AND SIPHONING
Before positioning the Air Treatment Unit make sure you
have sufficient room to install the siphon and drainage
pipe.
The humidification and cooling exchanger sections of the
TCF Units are fitted with a threaded drain pipe projecting
laterally about 80 mm.
To allow the regular outflow of water every drain must be
fitted with a correctly sized SIPHON (fig. 22).
