GB
12
2. STEAM HUMIDIFIERS T98 EH4
PRINCIPLE
OF OPERATION
Applying an electrical current to two electrodes
submerged a container of water, there is a cir-
culation of electric current between them
which increases the temperature of the water
to the boiling point.
Water, in fact, because it contains a minimum
quantity of salts, behaves as an electrical
resistance that closes the circuit between the
two electrodes.
OPERATION AND EQUIPMENT
PARTS
When the production of team is requested, the
electronic control applies current to the elec-
trodes immersed in the water, closing the con-
tactor.
The production of steam is controlled by mea-
suring the current absorbed with an ampero-
metric transformer. When it descends below
the required value following a lowering of the
water level, the feed valve is opened allowing
water to fill the feed tank from which it
descends, by the force of gravity, to the inside
of the cylinder.
The two small top level electrodes, positioned
at the top of the cylinder, control that the water
level does not supersede the maximum value.
Beyond this maximum value, water is dis-
charged through the overflow pipe of the feed
tank.
The other two electrodes, positioned on the
feed tank, measure the conductivity of the
incoming water which is useful to the electron-
ic control for maximum efficiency of the humidi-
fier based on the chemical characteristics of
the water itself.
The discharge valve is activated by the control
unit and is frequency dependent upon the
characteristics of the incoming feed water
allowing it to maintain an optimal concentration
of salt within the cylinder.
A
V
E
T
B
C
S
V
E
B
R
S
C
T
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
