ELEKTRA SelfTec DW User manual

SelfTec DW / DW F
®
ELEKTRA
• Self-regulating
heating cables
RU
Instrukcja montażu PL
Installation manual UK
Èíñòðóêöèÿ ïî ìîíòàæó
www.elektra.eu

Application
ELEKTRA SelfTec DW / DW F heating cables have
been designed to protect water pipes and
pipelines from freezing.
The cable can be installed:
• inside pipes,
• outside pipes, under the layer
of thermal insulation.
Placing the heating cables inside pipes can be
performed in pipelines already in operation.
Such installation method does not require
demounting of insulation and consequent
increase holes through the fabric of the building.
Heating cables can be installed inside pipes in
underground pipelines. The cable has been
approved for contact with drinking water.
Positioning the heating cable outside pipelines
is recommended for construction of new systems,
or for systems where thermal insulation hasn't
been laid yet.
®
3
UK

tin-coated multi-wire copper conductor
self-regulating conductive core
modified polyolefin insulation
PET covered aluminum foil shield
tinned copper braiding
modified polyolefin first outer sheath
LDPE second outer sheath certified
for drinking water applications
1
3
4
5
2
6
7
654321 7
SelfTec DW / DW F
®
ELEKTRA
4
Construction of the
ELEKTRA
heating cable
SelfTec DW
®

tin-coated multi-wire copper conductor
self-regulating conductive core
modified polyolefin insulation
PET covered aluminum foil shield
tinned copper braiding
fluoropolymer outer sheath
suitable for drinking water applications
1
3
4
5
2
6
Construction of the
ELEKTRA
heating cable
SelfTec DW F
®
654321
Characteristics
Power output of self-regulating heating cables
is the function of temperature, the values 10
and 16 W/m enable to assess the power output
at the temperature +10°C. The cables are
available on spools. They are terminated with
heat-shrink caps to protect against moisture.
5

After a cable segment has been cut off, the
cable remaining on the spool also needs to be
secured with a heat-shrink cap.
The cables need to be terminated with a joint
and connected to the power supply conductor.
For this purpose, the EC-PRO and ECM25-PRO
joint sets have to be applied (installation manuals
included in the sets).
Due to their properties, ELEKTRA SelfTec DW /
DW F can touch or cross and they are not prone
to local overheating. A significant advantage is
the possibility to cut the cables into segments of
required length.
- ELEKTRA SelfTec DW has a double-layer
sheath of halogen-free polyolefin and
LDPE certified for drinking water
applications
- ELEKTRA SelfTec DW F has a single-layer
fluoropolymer sheath suitable for drinking
water applications
• ELEKTRA SelfTec DW / DW F 10
- in 10°C on the pipe – 10 W/m
- in the ice water – 16 W/m
• ELEKTRA SelfTec DW F 16
- in 10°C on the pipe – 16 W/m
- in the ice water – 22 W/m
®
®
®
®
®
However, it is recommended
not to exceed the max. permissible heating
circuit length, as shown in Table 1.
Product features:
Technical parameters:
6
SelfTec DW / DW F
®
ELEKTRA

7
• power supply: 230V 50/60 Hz
• external dimensions:
7 x 10 mm (ELEKTRA SelfTec DW)
6x9mm(ELEKTRA SelfTec DW F)
• min. installation temperature: -25°C
• max. operating temperature: +65°C
• max. exposure temperature: +65°C
• min. cable bending radius: 3.5 D
• IP rating: IPX8
• max. protection: 16 A type C circuit breaker
• Product certificates: EAC, FBUZ, PZH Hygienic
Certificate (ELEKTRA SelfTec DW), NSF 61
(ELEKTRA SelfTec DW F)
• ISO 9001 quality system certification: IQNET,
PCBC
• CE marking
»
»
®
®
®
®

8
min.
switch-on
tempera-
ture
max. circuit length [m]
10 A 16 A 10 A 16 A
SelfTec
DW / DW F 10
®SelfTec
DW F 16
®
type C circuit breaker
-20°C
-15°C
0°C
+10°C
+10°C
in water
0°C
in ice
water
SelfTecDW/DWF
®
Table 1
SelfTec DW / DW F
®
ELEKTRA
75 110 55 75
80 115 60 80
95 120 70 90
100 125 80 100
65 70 55 60
55 65 40 55

9
Materials and tools
required for the installation of heating cables
• ELEKTRA SelfTec DW / DW F self-regulating
heating cable
• HL-T plumbing lead-through set for
/ ", / ", 1" pipes
• EC-PRO and ECM25-PRO joint sets
(with KF 0404 PRO junction box)
• tee joint for the pipe where the heating
cable will be entered
• sealing tape for pipes
• plumbing wrenches
required for the installation of heating cables
• ELEKTRA SelfTec DW / DW F self-regulating
heating cable
• EC-PRO and ECM25-PRO joint sets
(with KF 0404 PRO junction box)
• self-adhesive installation tape
• self-adhesive aluminium foil, min. 0.06 mm
thick, approx. 50 mm wide
• thermal insulation for pipes
inside pipes
outside pipes
®
®
1234

10
Installation of heating cables
inside pipes
Mount the plumbing tee joint on the pipeline
in order to position the heating cable inside
the pipe with the HL-T plumbing lead-through.
The set of plumbing lead-throughs for
1" pipes is available as an accessory. If the pipe’s
diameter is larger than 1”, use a reducing tee
joint with a proper branch (with internal thread
1”), on which the lead-through will be mounted.
The relevant self-regulating ELEKTRA SelfTec DW /
DW F heating cable should be cut to match the
pipeline’s length (the cable of the same length
or shorter).
The cables need to be terminated and connected
to the power supply conductor. For this purpose,
the EC-PRO and ECM25-PRO joint sets have to
be applied (installation manuals included in the
sets).
• Lead the cable through the elements of the
H-LT lead-through and enter through the tee
joint into the pipeline.
• When the cable has been entered, carefully
mount the lead-through to ensure that
the installation is tight.
1234
/", /",
H-LT
®
1. Entering the cable into a right angle
-shaped pipeline:
SelfTec DW / DW F
®
ELEKTRA

11
2. Entering the cable into a line-shaped
pipeline (the so called ”tapping”):
• Lead the cable through the elements of the
H-LT lead-through and then enter into the
pipeline through the tee joint.
12
plumbing HL-T lead-through
plumbing tee joint
1
2

12
• When the cable has been entered, mount
the tee joint on the pipeline.
• Then mount the HL-T lead-through.
When leading the cable is through the
H-LT lead-through, moisten it with water
to make it easier for the cable to slide
through.
Note:
SelfTec DW / DW F
®
ELEKTRA

13
When leading the cable through the HL-T
lead-through, the heating cable must not
become dirty.
Note:
Installation of heating cables
on the pipe
• The relevant self-regulating ELEKTRA
SelfTec DW / DW F heating cable should be
cut to match the pipeline’s length
(the cable should be longer and the surplus
is for the cold tail connection).
• Mount the heating cable alongside the pipeline
in its bottom part with self-adhesive installation
tape fixed with the spacing of 30 cm.
®

14
• For plastic pipelines, fix additionally self-
adhesive aluminum foil along the heating
cable to improve the temperature distribution
on the surface of the pipeline. Additionally,
the aluminum foil will secure the cable from
being pulled into the thermal insulation.
SelfTec DW / DW F
®
ELEKTRA
• After the heating cable has been installed on
the pipeline, place the thermal insulation on it.

15
Controls
Properly selected controls will ensure efficient and
at the same time economical operation of the
heating system. Self-regulating heating cables
always consume some amount of electric power,
even in temperatures above 0°C, therefore
application of a controller will ensure switch off
of the heating circuit, when required. Controllers
maintain the heating system on stand-by,
switching it on only when necessary.
Due to a high value of inrush current of
self-regulating heating cables, it is
recommended to provide power supply
to heating circuits through a contactor.
Note:
Controls of pipeline heating systems
ELEKTRA UTR60-PRO controller
When heating pipelines with heating cables, it is
recommended to apply temperature controllers
equipped with temperature sensors mounted on
the pipeline surfaces. The controllers below will
optimally serve this purpose:
for on support bracket mounting, load 16 A,
the maximum total power of directly connected
self-regulating heating cables is 1200 W.
The controller is equipped with a temperature
sensor for on-pipeline mounting, operating within

16
SelfTec DW / DW F
®
ELEKTRA
the range of -40°C up
to +120°C.
Adjustable hysteresis allows
to define precision of
temperature measurements.
for DIN bus mounting, load 16 A,
recommended total power
of directly connected
self-regulating heating cables
is 1200 W.
The controller is equipped
with a temperature sensor
for on-pipeline mounting.
ELEKTRA ETV-1991 controller
Installation of temperature sensors:
Sensor and heating cable mounted
in the pipeline

17
Sensor and heating cable mounted
on the pipeline
Final Check
After the heating cable has been installed in the
gutter or in case of pipe installation, after thermal
insulation has been laid, perform the
measurements of the heating cable insulation's
resistance, and test-run the heating circuits to
assess the correctness and safety of the system's
operation.
The heating cable insulation's resistance, as
measured with an appliance of the rated voltage
1000 V (megaohmmeter), should not drop below
50 M . Enter the results into the Warranty Card.Ù

For heating systems executed on:
• pipelines or steel tanks,
• as well as those equipped with insulation
made of processed metal
• pipeline, tank or insulation layer of processed
metal and
• PE conductor/heating cable’s shield to eliminate
damage during installation works on the system,
or associated metal processing.
perform the measurements of resistance of
the layer (layer tightness) between:
18
SelfTec DW / DW F
®
ELEKTRA

Warranty
ELEKTRA grants a 2 year-long warranty
(from the date of purchase) for the ELEKTRA
SelfTec DW / DW F heating cables.
®
Warranty conditions
1. Warranty claims require:
a. that the heating system has been executed
in full accordance with the Installation
Instructions herein,
b. presentation of the proof of purchase
of the heating cable under complaint.
2. The Warranty loses validity if any attempt
at repair has been undertaken by an
unauthorised installer.
3. The Warranty does not cover the damages
inflicted as a result of:
a. mechanical fault,
b. incompatible power supply or temperature
control,
c. lack of adequate overload and differential
protection measures in electric systems
supplying heating cables,
d. discord of the domestic heating circuit
with the current regulations in force.
4. Within the Warranty herein, ELEKTRA undertakes
to bear exclusively the costs required to cover
the necessary repairs to the heating cable itself,
or to exchange the cable. 19

The Warranty claims must be registered
with the proof of purchase, in the place
of purchase or the offices of ELEKTRA
company.
Note:
20
SelfTec DW / DW F
®
ELEKTRA