ELEKTRA VCDR User manual

E
Protection of gutters, downpipes
and roofs against snow and ice
C
Characteristics
ELEKTRA VCDR
heating cables
The ELEKTRA VCDR heating cables meet the requirements of
EN-60335-1 and EN 60335-2-83 standards. They are manufactured as
2 core cables (single-sided power supply), with a power rating of 20 W/m,
finished with a 4m cold cable. The heating cables and power supply cables
are coated with a UV-resistant material.
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A
Advantages
S
Selection
ELEKTRA VCDR heating cables prevent:
Water freezing in gutters and downpipes and also prevent damage
to these systems
Accumulation of snow and ice on roofs
Development of seepage on facades of buildings
Development of icicles
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•
•
•
To insure effective operation of a heating system, the installed power must be
design.
Also most important thing is to take under consideration the location of the facility in
the climate zone, the diameter of downpipes and influence of the wind.
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T
Technical data
m W-
TYPE LENGTH POWER
TABLE 1 Technical data of VCDR20 cables
Other types available on special order.
The rated supply voltage of the cables is 230V; 50/60 Hz.
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VCDR 20/190 9.5 190
VCDR 20/235 12.0 235
VCDR 20/330 16.5 330
VCDR 20/380 19.0 380
VCDR 20/520 26.0 520
VCDR 20/600 29.0 600
VCDR 20/800 40.0 800
VCDR 20/1000 50.0 1000
VCDR 20/1140 57.0 1140
VCDR 20/1300 65.0 1300
VCDR 20/1560 78.0 1560
VCDR 20/1720 86.0 1720
VCDR 20/2050 102.0 2050
VCDR 20/2360 118.0 2360
VCDR 20/2710 135.0 2710
VCDR 20/3000 150.0 3000
VCDR 20/3450 175.0 3450

I
Installation in gutters
and downpipes
First Steps:
Measure the lengths of gutters and downpipes
Determine the unit heating power
Select appropriate cable length according to Table 1
When calculating the heating cable lengths take the following
into consideration:
If the calculated heating cable length does not have an exact
equivalent specified in Table 1, you can select a longer heating cable
and place the additional section in the gutter
You can select two heating sets, one set for the gutter and a separate
set for the downpipe
If the water from downpipes is drained directly into the sewage
system, then the section of the drainage pipe from ground level
to the frost penetration depth must be heated
•
•
•
•
•
•
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Examples of installation of the VCDR20 heating cable in a gutter
and downpipe
Single VCDR20 heating cable in a gutter
and downpipe assures the power of
20 W/m.
Double VCDR20 heating cable in the
gutter and downpipe assure the power
of 40 W/m.
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Double VCDR20 heating cable in the gutter
(40 W/m) and single cable in the downpipe
(20 W/m)
60 W/m of heating power in the gutter
– triple cable, and 40 W/m in the downpipe
– double cable
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Gutter spacing clip
Heating cables installed in a gutter
using the clips
Installation of heating cables in gutters
The following elements are used for installing heating cables in gutters:
Clips
ELEKTRA TMS installation tape
Gutter and downpipe spacing steel cord with clips
The mounting elements enable durable installation and maintaining uniform
distances between the heating cables. The distance between the clips or ELEKTRA
TMS tape sections must not exceed 40 cm.
•
•
•
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Spacing steel cord with clips
Heating cables installed in a gutter
using the spacing steel cord with clips
ELEKTRA TMS installation tape
(standard tape length – 10 m)
Heating cables installed in a gutter using
the ELEKTRA TMS tape
In climate zones and in areas with
heavy snowfalls the heating cables in
the gutter must be installed using
spacing steel cord with clips.
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Installing the heating cables in downpipes
The following heating cable installation methods can be used for downpipes:
1. When installing a single heating cable, the cable can be placed freely in the
downpipe without any mounting elements. However, the length of the downpipe
must not exceed 6m. Otherwise, heating cable sections must be fixed to
a steel cord or chain of similar strength. The supporting wire can be fixed to the
building structure or any steel element (rod, flat bar) installed directly over the
downpipe inlet.
2. When installing a double cable, use clips or ELEKTRA TMS installation tape to
install the cables. These mounting elements will assure maintaining a uniform
distance between adjacent sections of the cable. The distance between clips or
sections of installation tape must not exceed 40cm.
Downpipe spacing clip
Heating cables installed inside
a downpipe using sapcing clips
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Heating cables installed in a gutter using
the ELEKTRA TMS tape
If the downpipe length exceeds 12m,
use spacing steel cord with clips to
install a double heating cable.
Connection of gutter
and downpipe must be
secured with a stainless
flat bar in order to pre-
vent possible damage to
the heating cable.
Installation of heating cable below the
ground level
If the water from downpipes is drained
directly into the sewage system, then
the section of the drainage pipe from
ground level to the frost penetration
depth (approximately 1.0m) must be
heated.
ELEKTRA TMS installation tape
(standard tape length – 10m)
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Downpipe spacing steel cord with clips

Installing heating cables in roof
runners and on the edges of roofs
In areas with heavy snowfalls, heating
the gutters and downpipes does not
only assure complete removal of ice
and snow. It is also necessary to heat
the edge of the roof adjacent to the
gutter on the width of approximately
50 cm and roof channels.
Use clips/holders to install cables on the
roof edges. Example of heated roof edge
Installation tape for roof channels
Copper installation holder or Zinc-titanium
installation clips/holdres
These clips/holdres can be:
Fixed to the roof using
adhesive tape
Riveted to the roof
Suspended on insulated carrying
cable (shown in the figure above)
•
•
•
Use plastic installation tape to install
cables in roof channels. Installation
mesh made of stainless wires or
ELEKTRA TMS tape can also be used.
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Example of installation
of heating cables in roof
runner
C
Control
Small, single zone applications may be
controlled by ELEKTRA ETR2R
(max load 16A).
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ELEKTRA ETR2R controller with
temperature and humidity sensor

The ELEKTRA ETOR2 has
been developed to control
larger applications (max load 3 x
16A). It can control up to 2
zones or a single zone utilising 2
sensors. ETOR2 may also be
used to control 2 separate areas,
e.g. a driveway and gutters.
Those temperature controllers
switches the heating system on
only when two conditions are
fulfilled:
The ambient temperature
is within the programmed
range
•
•Humidity sensor signals
snowfall
The humidity sensor must be
installed on the bottom of the
gutter. The temperature sensor
must be installed outside the
building and must not be
exposed to sunlight (for example
on the north side of the
building).
Method of installing the humidity sensor inside the gutter
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ELEKTRA ETOR2 controller with
temperature and humidity sensor

S
Shock
protection
Complete fire safety of the ELEKTRA VCDR heating cable can be assured by:
•Connecting the heating cable shield to the electrical system
protective wire (PE)
•Installing a ∆≤30 mA residual current circuit breaker in the heating
system to protect against electric shock
•Measuring the resistance of insulation and wires of the heating cables
– the value of insulation resistance of each heating cable measured with
a 1000 V device must not be less than 10MΩ
ATTENTION: The residual current circuit breaker can be common for
the heating system and other loads providing this will
not cause the flow of residual current the value of which
will exceed its permissible sensitivity. Assessment of the
level of protection against electric shock for the heating
system must be carried out by an authorized ELEKTRA
technician or an electrician with valid licenses.
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SHOCK
PROTECTING
WITCH
TEMPERATURE
CONTROLLER
PE
L
L
L1
N
N
ELEKTRA VCDR
HEATING CABLE
Copper Screen
(green-yellow)
∆Ι
Protecting wire
(green-yellow)
Phase conductor (black or brown)
Neutral conductor (blue)
230V
Diagram showing the connection of heating cable
and the PE mains protective cable
bluebrown
O
Operation
Prior to every heating season the user should clean the gutters and downpipes
from leaves and debris – otherwise the heating quality will deteriorate, this can also
lead to overheating of the cables.
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ELEKTRA provides a 10-year warranty (from the date of purchase)
for the VCDR heating cables.
Warranty terms:
1) The complaint can only be recognized if:
a) The heating system is fitted according to this installation
manual by a licensed technician
b) A correctly filled out Warranty Card is produced
c) Heating cable proof of purchase is produced
2) Any repairs carried out by a person other than an authorized
ELEKTRA technician shall render the warranty null and void
3) The warranty does not cover damage caused by:
a) Mechanical damage
b) Incorrect power supply
c) Lack of overload protection and residual current protection
d) Electrical system installed contrary to applicable regulations
4) Under the warranty ELEKTRA shall only cover any costs related to repairing
or replacing the defective heating cable.
ATTENTION! Claims must be submitted together with the Warranty
Card and proof of purchase at the point of sale where the product
was purchased or at an ELEKTRA office.
W
Warranty
Card
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The Customer must keep the Warranty Card for the entire warranty period, i.e. 10 years.
Warranty period runs from the date of purchase.
Address
DETAILS OF INSTALLER / ELEKTRICIAN
Name & Surname
Address
Post Code Town
Professional body
enrolment number
Tel. Fax
E-mail
Post Code Town
Company Stamp /
Seal
Measurement results
Insulation resistance before installation
Insulation resistance after installation
NOTE!
Place the self-adhesive rating plate
attached to the product here
(must be carried out prior to installing
the heating system)
Date Installer signature
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INSTALLATION LOCATION
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ESG (EN) 98Grupa V5 06/12 B5 (2) h
ul. Marynarska 14
02-674 Warszawa, Poland
tel.: [phone]
fax: [phone]
e-mail: [email protected]
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SILVER ACE ’93 BRONZE HELMET ’97 SILVER HELMET ’98 GOLD HELMET ’97
GOLD MEDAL
MTP Poznań ’2001
BUSINESS GAZELLES
2007
BUSINESS GAZELLES
2006
BUSINESS GAZELLES
2008
FIRM OF THE YEAR
2008