Compu-aire MINI-TEMP PLUS Installation, Operation & Maintenance Instructions Manual page 22

4. steam Generator Type Humidifier
PRINCIPLE OF OPERATION
(See also Initial Start-Up)
AIR GAP
FILL CUP
OVERFLOW
t ,
Figure 26;
OPERATION SCHEMATIC
./ STEAM DISTRIBUTOR
ELECTRODES
CYLINDER
When the humidistat calls, the cylinder fills to 110% of the Full
Load Amperage (F. L. A.) or to the top of the cylinder
I
whichever
comes first.
If it reaches 110% F.L.A. the water heats and boils away to a level
giving only 90% F.L.A.
An electronic timer uses the rate of fall to determine the water
level. The objective is to concentrate current-carrying minerals
in the cylinder so that a smaller volume of water is required to
produce the rated steam output.
This achieve the longest life for the disposable cylinder because
of minimum electrode coverage and uses less energy because the high
concentration allows minimal drain rate.
When it reaches 90% F.L.A. the fill valve comes on. The drain
valve should only come on in addition if the water level is too low
and a dilution is required. Otherwise this fill boil cycle
continues until the water reaches an optimum low water level,
always maintaining an average of 100% F.L.A.
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