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Operating principle
In the electrode boiler humidifier, the current flowing between the electrodes in the water in the cylinder generates the
heat necessary to boil the water.
By controlling the water level and the concentration of salt measured in the steam cylinder (U1) using the feed water
solenoid valve (U8) and the boiler cylinder electric drainage valve (U9), the electric current is regulated by means of an
amperometric transformer (U11).
When steam is needed, the humidifier contact is closed (see the electrical diagram) which provides power to the immersed
electrodes. When the current falls below the value required as a result of the fall in the water level, the feed water solenoid
valve is opened (U8).
The boiler cylinder electric drainage valve (U9) is opened at intervals depending on the characteristics of the feed water
supply in order to maintain the optimum concentration of dissolved salts in the water in the cylinder (U1).
Feed water
Values for the feed water for medium-high level of conductibility of a humidifier with immersed electrodes.
Hydrogen ion activity
Specific conductibility at 20 °C
Total dissolved solids
Residual fixed at 180 °C
Total hardness
Temporary hardness
Iron + Manganese
Chlorides
Silica
Residual chloride
Calcium sulphate
Metallic impurities
Solvents, dilutents, soaps, lubricants
(1) Values dependent on the specific conductibility; in general: TDS @ 0,93 * s20; R180 @ 0,65 * s20
(2) not lower than 200% of the Chloride content in mg/l di Cl-
(3) not lower than 300% of the Chloride content in mg/l di Cl-
Connections
The installation of the humidifier requires connection to the feed tubes of the water drain.
PKG-SVX19B-E4
pH
, 20 °C
R
TDS
R180
TH
Drain
min 5 °
-
-
µS/cm
-
mg/l
-
mg/l
-
mg/l CaCO3
-
mg/l CaCO3
-
mg/l Fe + Mn
-
ppm Cl
-
mg/l SiO2
-
mg/l Cl-
-
mg/l CaSO4
-
mg/l
-
mg/l
valve
Filter
Siphon
LIMITS
Min.
7
300
(
)
1
(
)
1
100(
)
2
60(
)
3
0
0
0
0
0
0
0
Feed tubes
Max.
8.5
1250
(
)
1
(
)
1
400
300
0.2
30
20
0.2
100
0
0
63
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Troubleshooting
