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1
PRODUCT TECHNICAL SPECIFICATION
1.1
FUNCTION DESCRIPTION
The screw-mounted electrical heating unit (heating unit) is designed exclusively for water heating. It is
designed as an additional heating source in water heaters connected in a system with solar collectors. It can
also be used as an additional source of heating in accumulation tanks. If the installation requirements are
obeyed, it can be used as the main source of heating by a heater, or for other purposes.
Water is heated by tubular heating element. The well includes the sensor of safety thermostat. Water
temperature is controlled by an external controller, which controls the heating. Heating can be carried out
in three power steps. In the event of a heating failure, the safety thermostat switches off the power supply
at all poles.
1.2
DESCRIPTION OF ACTIVITY
The operation is controlled by an external voltage of 230 VAC from a parent external controller connected to
terminals RS1, RS2, RS3. Heating can be carried out in three power steps. For example, for TJ 6/4" E 6 kW:
6 kW, 4 kW, 2 kW. Heating of the individual power steps is indicated by a green translucent colour
on the housing cover (Figure 2, Figure 9).
1.3
VOLTAGE
Before interfering with the wiring, it is essential to switch off the power supply!
And wait for at least one minute.
The voltage of phase L1 is the supply voltage for the PCB (printed circuit board). Unless there
is voltage L1 = the controller does not start the heating.
1.4
SIGNALLING
The PCB contains 7 LEDs (Figure 5, Figure 8)
Green colour indicating supply voltage "heating on": LED L1, LED L2, LED L3.
Green colour indicating "switching present": LED PWR
Red colour indicating controlling external "voltage present": RS1, LED RS2, LED RS3
1.5
ADVICE FOR CUSTOMERS
Prior to putting the heating element into operation, re-measuring of insulation resistance is
recommended. The i
nsulation resistance in cold must not be below 50 MΩ. If the insulation
resistance is lower, we recommend drying the heating element.
Both the electric and water installation must follow and meet the requirements and regulations
applicable in the country of use!
