Drazice TJ 6/4“ -2 Specification sheet

OPERATING AND
INSTALLATION MANUAL
SCREW-MOUNTED ELECTRICAL HEATING
UNIT
TJ 6/4“ -2
TJ 6/4“ - 2,5
TJ 6/4“ - 3.3
TJ 6/4“ - 3.75
TJ 6/4“ - 4.5
TJ 6/4“ - 6
TJ 6/4“ - 7.5
TJ 6/4“ - 9
Družstevní závody Dražice - strojírna s.r.o.
Dražice 69, 294 71 Benátky nad Jizerou
Phone.: [phone]
Fax: +420 / 326 370 980
e-mail: [email protected]

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CONTENTS
1 PRODUCT TECHNICAL SPECIFICATION....................................................................................................... 4
1.1 FUNCTION DESCRIPTION ................................................................................................................... 4
1.2 ADVICE FOR CUSTOMERS .................................................................................................................. 4
1.3 DESIGN AND GENERAL HEATER DIMENSIONS................................................................................... 4
2 OPERATION AND FITTING INSTRUCTIONS................................................................................................. 5
2.1 ASSEMBLY.......................................................................................................................................... 5
2.2 ELECTRICAL INSTALLATION................................................................................................................ 6
2.2.1 GENERAL INFORMATION for ELECTRICAL INSTALLATION ......................................................... 6
2.2.2 WIRING SCHEME........................................................................................................................ 6
2.3 HEATING UNIT OPERATION ............................................................................................................... 7
2.4 INSPECTION, MAINTENANCE............................................................................................................. 7
2.5 MOST FREQUENT FUNCTION FAILURES AND THEIR CAUSES ............................................................ 7
3 IMPORTANT NOTICES ................................................................................................................................ 8
3.1 INSTALLATION REGULATIONS............................................................................................................ 8
3.2 SPARE PARTS...................................................................................................................................... 8
3.3 DISPOSAL OF PACKAGING MATERIAL AND NON-FUNCTIONING PRODUCT...................................... 8

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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.
CAREFULLY READ THIS MANUAL BEFORE INSTALLING THE WATER HEATER!
Dear customer,
The Works Cooperative of Dražice – Machine Plant, Ltd., would
like to thank you for your decision to use a product of our
brand. With this guide, we will introduce you to the use,
construction, maintenance and other information on electrical
water heaters.
The manufacturer reserves the right for engineering modification of the product.
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%. 80%.
Product’s reliability and safety is proven by tests implemented by the Engineering Test Institute in Brno.
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.

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1PRODUCT 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. It is not intended
for use in stainless tanks. Types with extended cooling compartment can be used in accumulation tanks
marked with v6 and v7.
Water is heated by tubular heating element. Thermowell contains sensors of a safety fuse and a thermostat
(both devices are in a single block). The thermostat controls the set temperature of water. In case of
a failure, the safety fuse switches off electricity supply in all poles within the temperature range of 0 –90°C.
1.2 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 electric and water installation must follow and meet requirements and regulations
relevant in the country of use.
1.3 DESIGN AND GENERAL HEATER DIMENSIONS
The heating unit consists of an electrical heating element with a connecting thread G 6/4“.(Figure 2)
A thermostat and a safety fuse; the element's operation control light; and a connecting terminal board are
placed under the wiring plastic cover Chyba! Nenalezen zdroj odkazů. To use the OKC … NTR, NTRR, OKCE
… NTR, NTRR heaters in solar systems with reheat by means of electricity, the heaters have a G 6/4" neck
placed for mounting a secondary electrical heating unit. The heating unit is placed above the lower
exchanger.
Thermostat button Electrical wiring cover Heating element Thermostat control Control light
Figure 1
Figure 2

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TYPE
OUTPU
T
CONNECTION
connection
HEATING
TIME FROM
10°C TO
60°C
(approx 150
l)
HEATING
TIME
FROM
35°C TO
60°C
(approx
150 l)
ELECTR.
PROTECTI
ON
SET
TEMPERAT
URE SCOPE
UNIT
LENGTH
(L)
UNIT
LENGTH
(L1)
WEIGHT
kW
hrs
hrs
°C
mm
mm
kg
TJ 6/4“ – 2
2
1 PE-N AC
230 V/50Hz
4,5
2,2
IP 45
5 –74
-
380
1,6
TJ 6,4“ – 2,5
2,5
1 PE-N AC
230 V/50Hz
4
2
IP 45
5 –74
-
405
1,8
TJ 6,4“ – 3.3
3,3
3 PE-N AC
400 V/50Hz
2,7
1,5
IP 45
5 –74
325
-
2,0
TJ 6,4“ –
3.75
3,75
3 PE-N AC
400 V/50Hz
2,3
1,2
IP 45
5 –74
-
450
2,2
TJ 6,4“ – 4.5
4,5
3 PE-N AC
400 V/50Hz
2
1
IP 45
5 –74
-
500
2,3
TJ 6,4“ – 6
6
3 PE-N AC
400 V/50Hz
1,5
0,7
IP 45
5 –74
-
520
2,4
TJ 6,4“ – 7.5
7,5
3 PE-N AC
400 V/50Hz
1,3
0,6
IP 45
5 –74
575
685
2,4
TJ 6,4“ – 9
9
3 PE-N AC
400 V/50Hz
1
0,5
IP 45
5 –74
605
720
2,6
L - Screw-mounted electrical heating unit of TJ series
L1 - Screw-mounted electrical heating unit of TJ series with an extended cooling compartment
Table 1
2OPERATION AND FITTING INSTRUCTIONS
2.1 ASSEMBLY
The heating unit shall be mounted in the heater's neck. The end of the thread is provided
with a rubber seal. To ensure better tightness we recommend the screw joint being
additionally sealed with cannabis, a Teflon sealing tape or with a mastic sealant (be careful –
choose a mastic sealant suitable for demountable joints). Tighten the element properly.
If the cable bushing is not directed upright down, loosen the 4 screws on the plastic cover
bottom. Turn the cover (not more than by 180°) to the desired position and retighten the
screws. Check whether the live parts of the wiring do not touch.

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2.2 ELECTRICAL INSTALLATION
2.2.1 GENERAL INFORMATION FOR ELECTRICAL INSTALLATION
The heating unit is connected to a 230/400 V 50 Hz electrical network conductor with
a corresponding section and a protection adequate to the heating element output.
Notice: The power supply must contain a breaker disconnecting all poles of the network.
Perform the installation in compliance with applicable CSN standards.
2.2.2 WIRING SCHEME
TJ 6/4“ – 2 P= 2 kW TJ 6/4“ - 3,3 P = 1,1 kW TJ 6/4“ - 7,5 P = 2,5 kW
TJ 6/4“ - 2,5 P= 2,5 kW TJ 6/4“ - 3,75 P = 1,25 kW TJ 6/4“ – 9 P = 3 kW
TJ 6/4“ - 4,5 P = 1,5 kW
TJ 6/4“ – 6 P = 2 kW
Figure 3
Figure 4 Figure 5

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2.3 HEATING UNIT OPERATION
Simple control consists only of setting the desired temperature on the control thermostat knob. The setting
range is 5 -74°C. The recommended set temperature is 60°C approximately. The * symbol –fuse against
freezing 5-8°C. When the control light is on, the element is running.
2.4 INSPECTION, MAINTENANCE
Maintenance involves decalcification of the heating element in certain time intervals selected by water
hardness at the place of use. Damage to the heating element due to calcareous sediments is not accepted
by the manufacturer as a reason for complaint.
Notice: If the heating unit is used in an accumulation heater, the wear of the anode rod of
the heater may deteriorate. We recommend checking it more frequently. Consider the
instructions of the manufacturer regarding the exchange of the anode rod.
2.5 MOST FREQUENT FUNCTION FAILURES AND THEIR CAUSES
Table 2 Other potential failures –
FAILURE SYMPTOM
SOLUTION
The element operation
light is not on.
The safety fuse is non-self-returning.
It is activated by pressing a button on the
thermostat body.
If the heating element
fails, there is no
indication and the
control light is on even
when the thermostat is
active.
Have the heating unit repaired by an
authorised company.
Table 2
Do not attempt to repair the failure yourselves. Seek either expert or service help. It does
not take much for an expert to remove the defect. When making a repair appointment,
report the type and serial number you find on the performance plate of your water heater.

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3IMPORTANT NOTICES
3.1 INSTALLATION REGULATIONS
-When active, the element and the termowells have to be surrounded with a sufficient amount of
water from all sides.
-Thermic water flow must not be prevented.
-Mounting positions –horizontal or vertical from under.
-The length of the 6/4 “ neck shall not exceed 70 mm. If longer, the variant with an extended cooling
compartment has to be used.
-If the length of the neck is within 100 mm, it has to be extended on the water side, or undercut in
a minimum length of 40 mm to the minimal diameter of 50 mm.
-The maximum pressure in the tank is 10 bar.
Both the electric and water installation must follow and meet the requirements and
regulations relevant in the country of use!
3.2 SPARE PARTS
Always state the type of the heating unit and the name of the spare part when placing an order.
Thermostat and safety fuse Conductors
Sealing ring
3.3 DISPOSAL OF PACKAGING MATERIAL AND NON-
FUNCTIONING PRODUCT
A service fee for providing return and recovery of packaging material has
been paid for the packaging in which the product was delivered. The service
fee was paid pursuant to Act No 477/2001 Coll., as amended, at EKO-KOM
a.s. The client number of the company is F06020274. Take the water heater
packages to a waste disposal place determined by the town. When the
operation terminates, disassemble and transport the discarded and
unserviceable heater to a waste recycling centre (collecting yard), or contact
the manufacturer.
31-10-2016