ELEKTRA SelfTec PRO Series User manual

RU
Instrukcja montażu PL
Installation manual UK
Инструкция по монтажу
Installation Manual
®
ELEKTRA SelfTec PRO
Self-regulating Heating Cables
www.elektra.eu

3
Table of Contents
1. Applications 4
2. Self-regulation: principle of operation 5
3. Characteristics and technical properties 7
4. General information 10
- Protecting pipelines against freezing 10
- Protection of gutters and downpipes against
snow and ice deposition 12
5. Controls 16
6. Materials and tools 19
7. Installation 20
- Protection of pipelines against freezing 20
- Protection of gutters and downpipes against
deposition of snow and ice 24
8. Power supply and termination 29
9. Power supply system 31
10. Check of the ready system 31
11. Warranty Card 33

1. Applications
®
ELEKTRA SelfTec PRO heating cables with heat output
10, 20 and 33 W/m are intended for
1. Anti-frost protection of
• water fixtures,
• sprinkler systems,
• fat drainage pipelines,
2. maintaining required temperature of transported
agent in pipes and pipelines,
3. prevention of snow and ice deposition
• in gutters,
• in downpipes, roof edges and roof runners,
• in roof drains,
®
additionally, ELEKTRA SelfTec PRO 33 W/m heating cables
can be applied in linear drainage of drives.
®
ELEKTRA SelfTec PRO TC heating cables are intended for
1. the anti-frost protection of central heating pipelines or process
heat pipelines during periods of breaks in operation,
2. the anti-frost protection of fat drainage pipelines
in case any danger of agent leakage exists,
3. linear drainage of drives, where petroleum derivate
substances are present.
Installation Manual Self-regulating Heating Cables
®
ELEKTRA SelfTec PRO
4

6 5 4 3 2 1
Tin-coated multi-wire copper conductor core
Self-regulating conductive polymer
Modified polyolefin insulation
PET covered AL foil shield
Tinned copper braiding shield
UV resistant halogen free outer sheath
1
2
3
4
5
6
2. Self-regulation: principle
of operation
Self-regulating cables consist of two copper cores in parallel, connected
with a core of crosslinked polymer with the addition of graphite.
The core is a self-regulating heating element with the resistance value
depending on the ambient temperature. The lower the ambient
temperature, the lower the core’s electrical resistance value and,
consequently, the higher heating power of the cable. The higher the
ambient temperature, the higher the core’s resistance and therefore
the lower the heating power of the cable.
Due to their properties, self-regulating heating cables can touch or
cross freely, with no danger of spot overheating. Another significant
advantage is the possibility to have cables cut into segments of any
required length.
Still, the max. permissible length of a heating circuit must be
observed, as estimated in table 2.
5
Construction of
®
the ELEKTRA SelfTec PRO heating cable

Heating power [W/m]
ELEKTRA SelfTec
ELEKTRA SelfTec
ELEKTRA SelfTec
®PRO 33
®PRO 20
®PRO 10
o
Temperature [ C]
®
Heating power of the ELEKTRA SelfTec PRO self-regulating cables
in the function of ambient temperature
Advantages of self-regulating heating cables:
• they can be cut on construction site into segments of required lengths
(max. permissible length values are given in table 2). This feature facilitates
the selection of the adequate self-regulating cable's length during
planning stage, as well as the process of installation,
• the ambient temperature's drop will cause the automatic increase of the
cable's heating power,
• they can touch or cross with no danger of overheating.
Note:
In ambient temperatures above 0°C, self-regulating heating cables
will not switch off, and will continue operation according to the
characteristics shown in the diagram.
6
Installation Manual Self-regulating Heating Cables
®
ELEKTRA SelfTec PRO
60
40
20
0
-20 020 40 60

3. Characteristics and technical
properties
®
Heating power of ELEKTRA SelfTec PRO heating cables
• 10 W/m
• 20 W/m
• 33 W/m
®
• ELEKTRA SelfTec PRO TC – 30 W/m
Heating power of self-regulating heating cables is the function of
temperature, the data from the diagram on page 6 give the heating power
value at +10°C. Self-regulating heating cables are available on spools,
terminated with a heat shrink cap to protect the cable against moisture.
The cable remaining on spool after the adequate cable segment has been
cut off, also requires protection by terminating it with the cap.
Self-regulating heating cables applied for installation of the heating system
must be terminated and connected to the power supply conductor. To do
this, installation joint sets EC-PRO or ECM25-PRO type can be used
(installation instructions included in packages).
7

®
SelfTec PRO TC – heating cables resistant against exposure to petroleum derivate substances
type/unit power
(10°C)
®
SelfTec PRO
10 W/m
®
SelfTec PRO
20 W/m
®
SelfTec PRO
33 W/m
®
SelfTec PRO TC
30 W/m
230 V ~ 50/60 Hz
~ 7 x 11 mm ~ 7 x 13 mm
-25°C
65°C
~ 6 x 13.5 mm
100°C
135°C
power supply off
85°C
power supply off
-30°C
self-regulating, shielded, single-side power supply
-50°C
2
1.3 mm
modified polyolefin
3.5 D
UV resistant
halogen free polyolefin
6 D
HFFR
XLEVA
tin-coated copper
2
1.1 mm
nickel plated copper
rated voltage
external dimensions of the cable
min. installation temperature
max. operation temperature
max. exposure temperature
type of heating cable
core cross-section
insulation
outer sheath
min. cable bending radius
8
table 1
Installation Manual Self-regulating Heating Cables
®
ELEKTRA SelfTec PRO

®
ELEKTRA SelfTec PRO heating cables feature:
• EAC product certificate,
• IQNET, PCBC system certificate according to ISO 9001,
• CE product marking.
9
table 2
type C protection
min.
installation
temperature
max. circuit length [m]
®
SelfTec PRO 20
20 W/m
®
SelfTec PRO 33
33 W/m
®
SelfTec PRO 10
10 W/m
switch on
temperature
®
SelfTec PRO TC 30
30 W/m
-20°C 85 125 180 45 65 90 120 50 65 85 100 69 91 103 103
-15°C 100 145 190 50 75 105 125 55 70 90 105 73 94 103 103
0°C 115 170 205 60 90 120 135 60 75 95 110 80 100 106 106
– – – 40 55 70 85 40 55 70 90 – – – –
+10°C 130 205 - 80 110 135 - 70 70 110 120 96 109 109 109
0°C in ice
water
10A 16A 10A 16A 20A 32A 40A16A 20A 32A
-30°C -50°C
20A 16A 20A 32A 40A

For protection of self-regulating heating cables, it is recommended to use
circuit breakers with type C characteristics.
Because of the inrush current which can significantly exceed the nominal
current value, max. lengths of the heating circuits should comply with the
lengths given in table 2. The values have been assessed for the min.
ambient temperature.
4. General information
Protecting pipelines against freezing
When protecting pipelines against freezing, or when maintaining agent
temperature, it is necessary to estimate the value of heat output per
1 metre of the pipeline of a particular diameter. The heat output should
balance heat losses of the pipeline. The heat losses depend from local
climate conditions, i.e.:
• min. ambient temperature,
• thickness of insulation mounted on the pipeline,
• the value of maintained temperature (in case of protection water
pipelines against freezing, +5°C is assumed).
Note:
Each heated pipeline must be equipped with thermal insulation.
Installation of heating cables should commence after hydraulic
pressure tests have been concluded.
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Installation Manual Self-regulating Heating Cables
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ELEKTRA SelfTec PRO

table 3 Heat losses
diameter of the pipeline
∆T
[°C]
thickness of mineral wool insulation
λ= 0.035W/mK
["]
[mm]
½ ¾ 1 1 1½ 2 3 4 5 6 8 10 12
15 20 25 32 40 50 65 80 100 150 200 250 300
10 20 7.3 9.0 10.6 12.8 15.3 18.4 23.1 27.8 34.0 49.6 65.1 80.7 96.2
30 11.0 13.4 15.8 19.2 23.0 27.7 34.7 41.7 51.1 74.4 97.7 121.0 144.3
40 14.7 17.9 21.1 25.6 30.6 36.9 46.3 55.6 68.1 99.2 130.3 161.3 192.4
50 18.3 22.4 26.4 32.0 38.3 46.1 57.9 69.5 85.1 124.0 162.8 201.7 240.5
60 22.0 26.9 31.7 38.4 45.9 55.3 69.4 83.5 102.1 148.8 195.4 242.0 288.6
20 20 4.8 5.7 6.5 7.7 9.0 10.6 12.9 15.3 18.4 26.3 34.0 41.8 49.6
30 7.2 8.5 9.7 11.5 13.4 15.8 19.4 23.0 27.7 39.4 51.1 62.7 74.4
40 9.6 11.3 13.0 15.3 17.9 21.1 25.9 30.6 36.9 52.5 68.1 83.7 99.2
50 11.9 14.1 16.2 19.1 22.4 26.4 32.4 38.3 46.1 65.7 85.1 104.6 124.0
60 14.3 17.0 19.5 23.0 26.9 31.7 38.8 45.9 55.3 78.8 102.1 125.5 148.8
30 20 3.9 4.5 5.1 5.9 6.8 7.9 9.5 11.1 13.2 18.4 23.7 28.9 34.0
30 5.8 6.7 7.6 8.8 10.2 11.8 14.2 16.6 19.8 27.7 35.5 43.3 51.1
40 7.7 9.0 10.1 11.8 13.5 15.7 19.0 22.2 26.4 36.9 47.3 57.7 68.1
50 9.6 11.2 12.7 14.7 16.9 19.7 23.7 27.7 33.0 46.1 59.2 72.1 85.1
40 20 3.4 3.9 4.3 5.0 5.7 6.5 7.7 9.0 10.6 14.5 18.4 22.4 26.3
30 5.0 5.8 6.5 7.4 8.5 9.7 11.6 13.4 15.8 21.8 27.7 33.5 39.4
40 6.7 7.7 8.7 9.9 11.3 13.0 15.5 17.9 21.1 29.0 36.9 44.7 52.5
50 8.4 9.6 10.8 12.4 14.1 16.2 19.3 22.4 26.4 36.3 46.1 55.9 65.7
60 10.1 11.6 13.0 14.9 17.0 19.5 23.2 26.9 31.7 43.6 55.3 67.1 78.8
50 20 3.0 3.5 3.9 4.4 5.0 5.7 6.7 7.7 9.0 12.2 15.3 18.4 21.6
30 4.6 5.2 5.8 6.6 7.4 8.5 10.0 11.5 13.4 18.2 23.0 27.7 32.4
40 6.1 6.9 7.7 8.8 9.9 11.3 13.3 15.3 17.9 24.3 30.6 36.9 43.2
50 7.6 8.7 9.6 11.0 12.4 14.1 16.7 19.1 22.4 30.4 38.3 46.1 53.9
60 9.1 10.4 11.6 13.1 14.9 17.0 20.0 23.0 26.9 36.5 45.9 55.3 64.7
11

∆T – difference of ambient temperature and required agent temperature
(e.g. water) inside the pipeline
For losses smaller than e.g. 10 W/m, assume 10 W/m.
For protection of valves, elbows, T-joints or flanges, it is required to add
extra approx. 0.5 m of the heating cable per each element.
Protection of gutters and downpipes against
snow and ice deposition
In the systems of protection against snow and ice deposition, self-regulating
®
ELEKTRA SelfTec PRO 20 and 33 heating cables are applied which prevent:
• snow and ice deposition on roofs,
• water freezing in gutters and/or downpipes,
• formation of damp patches on building facades,
• formation of icicles.
To ensure max. effectiveness of operation of the heating system, heating
power value needs to be assessed depending from local climatic conditions
(i.e. min. ambient temperature, snowfall intensity and wind operation).
Recommended heating power values are given in table 4:
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Installation Manual Self-regulating Heating Cables
®
ELEKTRA SelfTec PRO
=
pipeline heat losses
(according to table 3)
heating cable power
(10, 20, 33 W/m)
x
lenght of
the heating cable
lenght of
the pipeline

ambient
temperatures
heating power
> -5°C -5°C ÷ -20°C -20°C ÷ -30°C < -30°C
gutters
downpipes
roof runners
roof edges
roof area
extending beyond
the building outline
20 W/m 20 – 40 W/m 40 – 60 W 60 W
20 W/m 20 – 40 W/m 20 – 40 W/m 40 W/m
2222
200 W/m 200 – 250 W/m 250 – 300 W/m 350 W/m
22 22
~150 W/m ~250 W/m ~300 W/m ~350 W/m
22 22
~250 W/m ~300 W/m ~350 W/m ~500 W/m
13
table 4

The values given above refer to a gutter of the Ø100-125 mm diameter.
Gutters of larger diameters require application of the 20 W/m higher heat
output.
Flat roofs, or when roof snow barriers are installed, which would cause
snow deposition, require increase of the given values with approx. 15%.
Selection of the optimal power range depends from the climate zone the
building is located in.
Heating gutters and downpipes of the width (diameter) 150 mm installed in
a building located in the climate zone with mild winters requires single-led
®
installation of ELEKTRA SelfTec PRO 20 or 33 heating cable. For wider
gutters (of a diameter larger than 150 mm), double-led installation of
®
ELEKTRA SelfTec PRO 20 or 33 heating cable is recommended.
In regions that receive large amounts of snowfall, it is recommended to
additionally heat the roof edge adjacent to the heated gutter (suggested
width of the heated roof surface is approx. 500 mm).
Note:
If the downpipe water is led directly to a drainage channel, it is
necessary also to heat the downpipe segment from the ground level
to the frost penetration depth.
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Installation Manual Self-regulating Heating Cables
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ELEKTRA SelfTec PRO

Double-led installation in a gutter
with single-led installation
in a downpipe
Double-led installation in a gutter
and downpipe
Single-led installation in a gutter
or downpipe
Examples of installation of self-regulating heating cables
in gutters and downpipes
15

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Installation Manual Self-regulating Heating Cables
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ELEKTRA SelfTec PRO
5. 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.
5.1. Controls of pipeline heating systems
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:
ELEKTRA UTR60-PRO controller
for on-pipe mounting, load 16A,
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 the range of
-40°C up to +120°C.
Adjustable hysteresis allows to define
precision of temperature measurements.
Note:
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.

ELEKTRA ETV-1991 controller
for DIN bus mounting, load 16A,
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 ETI-1552 controller
for DIN bus mounting, load 10A,
recommended total power of directly
connected self-regulating heating cables
is 800 W. The controller is equipped
with a dedicated sensor operating within
the range of -40°C up to +120°C.
ELEKTRA ETN-4 controller
for DIN bus mounting, load 16A,
recommended total power of directly
connected self-regulating heating cables
is 1200 W. The controller can cooperate
with two temperature controllers,
where the second one acts as
a limiting sensor. Adjustable hysteresis
allows to define precision of temperature
measurements. Equipped with an “on/off”
switch.
17

ELEKTRA TDR 4022-PRO controller
for DIN bus mounting in electric switchboards,
applied in extended and complex heating
systems, two relays, load 8A each,
recommended total power of directly
connected self-regulating heating cables
is 600 W. The controller allows to set two
temperature levels and to adjust hysteresis.
The controller cooperates directly with BMS systems
via ModBus or Televis protocols or in an analog mode
via a relay operating in the alarm mode.
5.2. Controls of gutter, downpipe and roof
heating systems
The most efficient and economical heating system will be controlled with
a device equipped with a temperature and moisture sensor. The system
will be then switched on only when both sensors indicate snowfall,
freezing rain or icing. Depending on the size of the system and number of
zones to be heated, ELEKTRA ETR2 controllers are recommended with one
moisture sensor, or ELEKTRA ETO2 controllers with one or two moisture
sensors and an external temperature sensor.
ELEKTRA ETOR2 controller
for DIN bus mounting, load 3x16A,
factory-equipped with one temperature
and moisture sensor, allows to connect
the second auxiliary moisture sensor
for protection of two heated zones.
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Installation Manual Self-regulating Heating Cables
®
ELEKTRA SelfTec PRO

ELEKTRA ETR2 controller
for DIN bus mounting, load 16A,
recommended total power of directly
connected self-regulating heating cables
is 1200 W. Designed for smaller heating
systems, will service one heated zone.
Factory-equipped with one temperature
and moisture sensor.
6. Materials and tools
required for cable installation on pipes
®
• ELEKTRA SelfTec PRO self-regulating heating cable
• ELEKTRA KF 0404-PRO power supply junction box
• ELEKTRA ECM25-PRO termination joint set with M25 gland
for installation in the power supply junction box
• ELEKTRA EC-PRO heat shrink termination joint set
• self-adhesive installation tape (available as accessory)
• self-adhesive AL foil min. thickness 0.06 mm, width approx. 50 mm
(available as accessory)
• thermal insulation for pipes
• temperature controllers
and
• diagonal cutting pliers
• fitter’s knife
• wire stripping pliers
• long nose pliers
19

• slotted screwdriver
• tube compressor
• hot air blower
• insulation resistance meter
required for cable installation in gutters
and downpipes
materials and tools as above, minus self-adhesive installation tape
and self-adhesive AL foil, plus:
• gutter and downpipe holder or spacing wire with clips
(available as accessory)
• spacing wire support bar (available as accessory)
• downpipe spacing wire holder
• copperplate (Cu) or galvanized sheet (ZnTi) installation holder
(protection for tiled or tar paper roofs – available as accessory)
• self-adhesive installation tape (protection for metal sheet roofs
– available as accessory)
7. Installation
Protection of pipelines against freezing
Depending from the selected cable length, the cable should be installed:
• single-led along the pipeline
• spirally
• single-led (multi-led) along the pipeline
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Installation Manual Self-regulating Heating Cables
®
ELEKTRA SelfTec PRO