GB
9
1. GENERAL FEATURES ON STEAM HUMIDIFIERS
FUNCTION LOGIC
It is possible to create a flow of electric current
by simply applying tension to two electrodes
immersed into a water container. This makes
the water boil. In fact, water containing just a
very small quantity of salts, behaves as if it
were an electric resistance and closes the cir-
cuit between the two electrodes.
MAIN PARTS
Any steam requirement is controlled by the
electronic controller (R). It energises thecon-
tactor to supply power to the immersed elec-
trodes. Steam production is indicated on the
control display and the absorbed energy is
controlled by the current transformer (TAM).
When steam production drops below the set
value following a decrease of water level, the
controller instructs the solenoid valve (C) to fill
the charge tank (V) so as to allow water to flow
into the boiler by gravity.
The fill tank has two electrodes which measure
the conductivity of the feed water.
The ensures the best operation of the humidifi-
er in relation to the chemical characteristics of
the feeding water. On the top of the cylinder
there are two small high level electrodes (E):
they measure the water level and if it exceeds
the maximum selected value, water is dis-
charged through the relative discharge pipe.
The controller will instruct the drain solenoid
valve (S) to open/close on the basis of the
feeding water chemical characteristics. This
serves to maintain the best concentration of
salts within the cylinder and ensures the cor-
rect functioning of the humidifier.
(fig. 1 e 2)
V - Feed tank with electrodes for conductivity
measurement
E - Top level electrodes
T - Overflow pipe
B - Cylinder boiler
C - Feed valve
S - Discharge valve
R - Electronic control panel
ELECTRONIC CONTROLLER
The compact OEM humidifier is equipped with
the new microprocessor-based controller CDA
303.
The controller has a current transformer as well
as the operative contacts for the single-phase
function mode.
TECHNICAL CHARACTERISTICS T 93 e H2 T97 e H3
Production
Kg./h
3
3
Electrical absorption
amper
9,9
3,3
Power
kw
2,17
Feeding current
220/V/50 HZ
380/V/50 HZ
Monophase
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