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1 PRODUCT TECHNICAL SPECIFICATION
1.1
DESCRIPTION OF THE FUNCTION
The bivalent source for a heat pump with cascade control is designed exclusively for water heating. It is
designed as an additional heating to the heat pump, i.e., as a bivalent source to ensure thermal comfort
and possibly as a replacement for the heat pump in case of failure.
Water is heated by tubular heating element. The well includes the sensor of safety thermostat. Water
temperature should be controlled by thermal pump regulation. In case of a failure, the safety thermostat
switches off electricity supply in all poles at a temperature of 90–95 °C.
1.2
DESCRIPTION OF OPERATE
The operation is controlled by 230 VAC external voltage from the superior external controller connected to
the RS1, RS2, RS3 terminal. Heating can be performed in three power steps. For example for TJ 2" EHP 9 kW:
9 kW, 6 kW, 3 kW. The heating in the individual power steps is indicated by a green light on the body cover
(Figure 10).
1.3
VOLTAGE
Before working on the electrical installation, it is necessary to turn off the power supplies!
And wait at least one minute.
The L1 phase voltage is supplied to PCB (printed circuit board), if there is no voltage L1 =
the controller does not switch on the heating.
1.4
SIGNALING
PCB contains 7 pieces of LED indicators (Figure 6, Figure 9).
Green light indicating "heating switched on": LED L1, LED L2, LED L3.
Green light indicating supply voltage "switching present": LED PWR.
Red light indicating external control "voltage present": LED 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 insulation 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
relevant in the country of use!
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