Nibe DRAZICE TJ 2 EHP 6 kW Specification sheet

OPERATING AND
INSTALLATION MANUAL
BIVALENT SOURCE TO HEAT PUMP WITH
CASCADE REGULATION
TJ 2“ EHP 6 kW
TJ 2“ EHP 9 kW
Družstevní závody Dražice - strojírna s.r.o.
Dražice 69, 294 71 Benátky nad Jizerou
tel.: +420 / 326 370 911
e-mail: [email protected]

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CONTENTS
1 PRODUCT TECHNICAL SPECIFICATION....................................................................................................... 4
1.1 DESCRIPTION OF THE FUNCTION ...................................................................................................... 4
1.2 DESCRIPTION OF OPERATE................................................................................................................ 4
1.3 VOLTAGE............................................................................................................................................ 4
1.4 SIGNALING......................................................................................................................................... 4
1.5 ADVICE FOR CUSTOMERS.................................................................................................................. 4
1.6 DESIGN AND GENERAL HEATER DIMENSIONS................................................................................... 5
2 OPERATION AND FITTING INSTRUCTIONS................................................................................................. 6
2.1 INSTALLATION.................................................................................................................................... 6
2.2 ELECTRICAL INSTALLATION................................................................................................................ 8
2.2.1 GENERAL INFORMATION FOR ELECTRICAL INSTALLATION ....................................................... 8
2.2.2 WIRING DIAGRAM ..................................................................................................................... 8
2.2.3 APPLICATION SCHEME............................................................................................................... 9
2.2.4 WIRING DESCRIPTION................................................................................................................ 9
2.3 INSPECTION, MAINTENANCE........................................................................................................... 11
2.4 MOST FREQUENT FUNCTION FAILURES AND THEIR CAUSES .......................................................... 11
3 IMPORTANT NOTICES.............................................................................................................................. 12
3.1 INSTALLATION REGULATIONS.......................................................................................................... 12
3.1.1 OPERATING CONDITION.......................................................................................................... 13
3.1.2 OPERATING AND FAULT CONDITION, PCB SIGNALLING.......................................................... 14
3.1.3 FAULT EXTERNAL CONTACT..................................................................................................... 15
3.2 SPARE PARTS.................................................................................................................................... 15
3.3 DISPOSAL OF PACKAGING MATERIAL AND NON-FUNCTIONING PRODUCT.................................... 15

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CAREFULLY READ THIS MANUAL BEFORE INSTALLING THE PRODUCT
ACCESSORIES!
Dear customer,
Družstevní závody Dražice - strojírna s.r.o., would like to thank you for your decision to use a product of our
brand.
The product is not intended to be controlled by
a) people (including children) with reduced physical, sensual, or mental capacities, or
b) people with insufficient knowledge and experiences unless supervised by responsible person,
or unless properly instructed by such responsible person.
The manufacturer reserves the right for engineering modification of the product. The product is’t designed
for permanent contact with drinkable water.
It is recommended to use the product in indoor environment with air temperatures from +2 °C to +45 °C
and a relative humidity up to 80 %.
Product’s reliability and safety is proven by tests implemented by the Engineering Test Institute in Brno.
Made in the Czech Republic.
Meaning of pictograms used in the Manual
Important information for heater users.
Abiding by the recommendations of the manufacturer serves to ensure trouble-free operation
and the long service life of the product.
Caution!
Important notice to be observed.

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1PRODUCT 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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1.6 DESIGN AND GENERAL HEATER DIMENSIONS
The bivalent source consists of an electrical heating element with a connecting thread G 2“ (Figure 1). A safety
thermostat and a connection terminal block are placed under the wiring plastic cover.
Figure 1
Legend:
1 - bivalent source steel casing
2 - thermal insulation
3 - cover with wiring
Table 1
TYPE
OUTPUT
CONNECTION
RECOMMENDED
CIRCUIT BREAKER
VALUE
ELECTR.
PROTECTION
kW
A
TJ 2“ EHP 6 kW
2 - 6
3 PE-N AC 3x 230 V/50 Hz
3x 16
IP 44
TJ 2“ EHP 9 kW
3 - 9
3 PE-N AC 3x 230 V/50 Hz
3x 16
IP 44