RHOSS H51369, Инструкция по эксплуатации

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9. ACCESSORIES
For every evaporative cooling tower model various accessories and construction variants are available which can be
supplied together with the tower itself, and for some of them, even at a later stage as retrofit.
ELECTRICAL RESISTANCE ELEMENT
Serves to avoid ice formation in the basin during eventual plant shut-
downs in the cold/winter season.
It is supplied complete with the regulating thermostat.
LOW LEVEL CUT-OUT SWITCH
In the basin. Its purpose is to avoid that, if ever the supply of make-up
water is interrupted and the water level in the basin descends, the pump
draws in air going into cavitation or that, if the electric heating elements
are installed, these can operate without water being present in the basin. It
can also operate in an alarm function, providing a signal of anomalies in
the make-up system.
TWO SPEED MOTOR
It serves the purpose of modulating the cooling capacity of the evaporative
cooling tower as a function of the heat load in a given moment (if variable)
or in the colder seasons. It is controlled by thermostat located in the cold
water collecting basin, on the basis of the temperature of the latter.