HygroMatik HeaterLine HL 12, Руководство пользователя

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Page 12
4. Operation and Installation
4.1 Mode of Action
The Imersion Heater Principle
One to five heater elements (8) are placed in a closed cylinder
and connected to alternating current. The cylinder (9) is filled
with tap water, fully demineralized water or partially softened
water. Heat generated by the heater elements increases water
temperature to approx. 100°C/212°F.
When fully demineralized water is used, the feed water is practi-
cally free of minerals. This ensures long life for the cylinder and
heater elements since virtually no mineral deposits can settle or
build up. Fully demineralized water minimizes the number of ser-
vice / maintenance checks.
When tap water is used, some of the minerals dissolved in the
water will settle in the cylinder as solids of various compositions.
Most of these scale deposits are removed by periodic flushing or
use of a heavy-duty blow-down pump. See section "Servicing
During Operation with Tap Water".
The generated steam has a temperature of about 100°C/212°F
and minimal positive pressure ("pressureless” steam). It is virtu-
ally demineralized and germ-free.
4.2 Installation and Method of Operation
By pressing the control switch („Pos. I”) the humidifier will be
turned on.
When the hygrostat or controller signals a demand for humidifi-
cation, the inlet solenoid valve (14) opens. The solenoid valve is
designed for pressures from 1bar min., 10bar max. / 14.7 psi
min., 147 psi max.
Water is fed into the cylinder (9).
The water level in the cylinder must be maintained within a spec-
ified range. If the water level is too high, the ellbow acts as a
safety overflow for water drainage. If the water level is too low, it
could cause the heater elements (8) to overheat. Therefore,
power supply to the heater elements is shut off when water lev-
els are too low.
The cylinder water level is controlled by a level control (6). The
level control consists of a stainless steel cylinder with two float
switches and three reed contacts. The float switches indicate the
water level in the steam cylinder: "Dry Run", "Humidification"
and "Max. Level". The control capsule is pressure-equalized.