9
7. Operating instructions
A. Heaters type EJK do not need to be supervised during operation.
However, if the water is hard, heating elements should be periodically
cleaned of boiler scale as it blocks the heat flow and therefore
increases the current consumption and may cause damages of heating
elements.
B. The temperature of water in tank is set by the temperature controller
knob. Remember that electric energy consumption and accumulation
of boiler scale increase at higher temperatures. Temperatures of water
achieved for various settings during tests at the manufacturer's are
shown in tab. 3.
Tab. 3
Water temperature for various settings of temperature control knob
Three phase heater
(3 ~ 400 V)
Description
In its extreme left position the temperature
controller operates as an anti-freeze protection
feature, that is, it turns the heater on only after the
temperature drops down to +5
o
C.
Ca.+20
o
C, lukewarm water, directly suitable for
washing in a washbasin, no accumulation of boiler
scale
Ca.+45
o
C, moderately hot water, slight
accumulation of boiler scale
Ca.+65
o
C, hot water, high accumulation of boiler
scale
.
