operating and installation manual

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.: +420 /326 370 990
Fax: +420 / 326 370 980
E-mail: export@dzd.cz
CONTENTS
1
2
3
PRODUCT TECHNICAL SPECIFICATION ....................................................................................................... 4
1.1
FUNCTION DESCRIPTION ................................................................................................................... 4
1.2
ADVICE FOR CUSTOMERS .................................................................................................................. 4
1.3
DESIGN AND GENERAL HEATER DIMENSIONS................................................................................... 4
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 ............................................................................................................... 6
2.4
INSPECTION, MAINTENANCE ............................................................................................................. 7
2.5
MOST FREQUENT FUNCTION FAILURES AND THEIR CAUSES ............................................................ 7
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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CAREFULLY READ THIS MANUAL BEFORE INSTALLING THE PRODUCT
ACCESSORIES!
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.
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.
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.
-3-
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. 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 (Figure 1). 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.
Figure 1
Figure 2
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TYPE
OUTPUT
HEATING
TIME FROM
10°C TO 60°C
(approx.
150 l)
HEATING
TIME FROM
35°C TO 60°C
(approx.
150 l)
hrs
hrs
1 PE-N AC
230 V/50Hz
4.5
2.2
1 PE-N AC
230 V/50Hz
4
CONNECTION
kW
TJ 6/4" 2
TJ 6/4" 2.5
2
2.5
ELECTR.
PROTECTI
ON
SET
TEMPERATU
RE SCOPE
UNIT
LENGTH
(L)
UNIT
LENGTH
(L1)
WEIGHT
°C
mm
mm
kg
IP 45
5 - 74
-
380
1.6
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
2 OPERATION 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" - 2,5 P = 2.5 kW
TJ 6/4" - 3.3 P = 1.1 kW
TJ 6/4" - 3.75 P = 1.25 kW
TJ 6/4" - 4.5 P = 1.5 kW
TJ 6/4" - 6 P = 2 kW
TJ 6/4" - 7.5 P = 2.5 kW
TJ 6/4" - 9 P = 3 kW
Figure 3
Figure 4
Figure 5
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.
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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
FAILURE SYMPTOM
The element operation
light is not on.
If the heating element
fails, there is no
indication and the
control light is on even
when the thermostat is
active.
SOLUTION
The safety fuse is non-self-returning.
It is activated by pressing a button on the
thermostat body.
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.
-7-
3 IMPORTANT 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.
19-10-2017
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