ELEKTRA VCD7 User manual

elektra.eu
Instrukcja montażu
ELEKTRA
PL
• VCD7
• VCD10
• VC D17
Heating
Cables
Installation manual UK
Инструкция по монтажу RU

Application
ELEKTRA VCD7, VCD10 and VCD17 heating cables
are primarily intended for use in the rooms with atile
or natural stone oor covering. Additionally they
can be used with such oor covering materials as:
• Fitted carpet,
• Vinyl ooring,
• Parquet or other wooden covering,
• Laminate.
Fitted carpets and vinyl ooring, however, should
be suitable for use with electric underoor heat-
ing and bear the following markings:
ELEKTRA VCD heating cables are laid (at construc-
tion stage) on the screed oor or concrete sub-
oor with a layer of thermal insulation in order
to reduce heat loss. Then the cables are covered
with an anhydrite or cement screed.
tted
carpet
PVC
ooring
The applications of the ELEKTRA VCD heat-
ing cables also include protection of pipes
against freezing. The installation instructions
for this particular application is available at:
www.literature.elektra.eu.
!
3

ELEKTRA
Heating Cables
Characteristics
of the heating cables
• The heating cables are produced in ready-
made units of the following lengths:
ELEKTRA VCD7 from 11 up to 247 m,
ELEKTRA VCD10 from 7.5 up to 225 m,
ELEKTRA VCD17 from 5.5 up to 172 m.
• The cables are terminated at one end with
a2.5 m-long power supply conductor,
andajoint at the other.
• Heat output
ELEKTRA VCD7: 7 W/m,
ELEKTRA VCD10: 10 W/m,
ELEKTRA VCD17: 17 W/m.
• Power supply voltage: 230 VAC, 50/60 Hz.
• External dimensions: ≈ 5 x 7 mm.
• Min. installation temperature: -5°C.
• Min. cable bending radius: 3.5 D.
• Heating cables are screened, and their mains
connection via a residual current device con-
stitutes effective anti-shock protection.
Multi-wire
heating core
XLPE insulation
PET covered
aluminium foil shield
Tinned
copper braiding
Heat resistant PVC
external sheath
ELEKTRA VCD heating cables can be used as:
• primary room heating systems, constituting
exclusive heat source in rooms,
• secondary room heating systems, to achieve
the warm oor.
4

The label features the following pictograph:
Single-side powered
heating cables
Self-adhesive label
• “cold” power supply conductor
• double-core ELEKTRA VCD heating cable
• connecting joint between the power supply
conductor and the heating cable
1
2
3
Note:
Heating cables’ heating output may vary with
+5% and -10% from the label values.
Heating cables are designed for the rated voltage
230 VAC, 50 Hz.
!
1
2 3
5

ELEKTRA
Heating Cables
Materials and tools
required for the installation of heating cables
• ELEKTRA VCD heating cable,
• thermal insulation (XPS, hard styrofoam –
min. density 20 kg/m2or hard mineral wool),
• PE foil,
• ELEKTRA TME installation tape,
• temperature controller,
• 1.5 m-long protective conduit,
• 2.5 m-long protective conduit,
• deep installation box,
• ohmmeter,
• megaohmmeter,
• tools for wall chasing.
Note:
Never cut the heating cable.
Never shorten the heating cable, only the power
supply conductor may be shortened if required.
Never squash the “cold tail”.
Do not ever undertake on your own any at-
tempts to repair the heating cables, and in case
any damage is detected, report the damage to
an ELEKTRA authorized installer.
Never stretch or strain the cable excessively,
norhit it with sharp tools.
Do not install the ELEKTRA VCD heating cable
when ambient temperature drops below -5°C.
Do not lay the heating cable in places where xed
oor level furnishing has been planned (e.g. oor
level wardrobes).
Never lead the end joint and the connecting
joint between the heating cable and the power
supply conductor out of the surface. Both joints
must be placed within the layer of the concrete
or self-levelling screed.
Never bend the joint and end seal.
Do not use any nails or screws for the installa-
tion purposes.
!
6

Note:
Heating cables must be installed according with
the Instructions.
Mains connection of the heating cables should
be performed by an authorized electrician.
Heating cables should be always positioned
in the safe distance from other heat sources
(e.g. hot water pipes), the min. distance is 25 mm.
!
Type of
the
heating
system
Floor
type
Recom-
mended
heating
cables
Output per m2
of the oor
Warm
oor
Ceramic,
stone
and PVC
oorings
VCD10
VCD17 85 W/m²
Other
oorings VCD10 65 W/m²
Primary
heating
systems
Ceramic,
stone
and PVC
oorings
VCD7
VCD10
VCD17
Requires
designing the
heating system
and its controls
by a designer,
dealer or
authorized
installer.
Other
oorings
VCD7
VCD10
General information
Note:
The presence of the heating cable shall be made
evident by the posting of caution signs or mark-
ings, such as in the fuse box, at appropriate loca-
tions, such as at the power connection ttings
and/or at frequent intervals along the circuit and
be part of any electrical documentation follow-
ing the installation.
!
7

ELEKTRA
Heating Cables
Installation of the higher output (per1 m2) is nec-
essary if the oor warm-up time is to be reduced,
also if the heating system is not designed to oper-
ate continuously e.g. in hotel rooms, ofces etc.,
as well as when temperature controllers with
temperature setback are applied.
Min. permissible spacing between cables is as
follows:
Floor type VCD7 VCD10 VCD17
Stone or ceramic oorings 6cm 7 cm 10 cm
PVC 7cm 8cm 12 cm
Wood, tted carpet 8cm 10 cm —
Max. spacing between cables should not exceed
20 cm in order to prevent cold spots.
Types of screed
The two following screeds can be utilised with
oor heating:
• anhydrite screed – with the advantages of
short curing time (approx. 7 days), as well as
insignicant linear shrink and low porosity.
Large areas can be covered with this type
of screed (up to 300 m2), with no need for
expansion joints. Owing to low porosity, the
screed will efciently transfer heat and the
oor will warm up faster than in case of ce-
ment screed. This type of screed is, however,
sensitive to moisture and cannot be used in
rooms with continuous elevated moisture
levels;
• cement screed – with the advantage of mois-
ture and high temperature resistance. Due to
large linear shrink, with the oors larger than
3 0 m 2, when the side length exceeds 6 m,
expansion joints must be provided.
8

The screed should be separated from the side
walls with expansion tape. Screeds for oor heat-
ing must not be rigidly tied to the suboor or
walls (so called oating oor), to prevent down-
ward and sideward heat loss to the suboor and
external walls.
The length of the heating cables should be select-
ed so that they do not cross the expansion joints.
Only the power supply conduits (“Cold Tails”) can
cross the expansion joints. The Cold Tails have to
be installed in a metal protective conduit of the
length of approx. 50 cm.
*Please ensure that the screed thickness complies with local
building regulations.
Temperature control
A temperature controller is a core component
ofany oor heating system.
Controllers are used as the connecting element
between heating cables and domestic electric
circuit. Controllers will ensure the desired level
ofoor or air temperature.
• If heating cables act only as the supplement
of existing (primary) heating system, users will
be mostly interested in achieving the so called
warm oor – then temperature controllers
are recommended equipped with only oor
sensors maintaining desired levels of oor
temperature.
Technical
parameters
of oor screeds
Anhydrite
screed Cement screed
Screed thickness*35 – 60 mm 50 – 80 mm
Heat transfer 2 . 0 W / m .K1.0 – 1.1W/m.K
Curing time 7 days 28 days
Max. area with no
expansion joints 3 0 0 m ² 3 0 m ²
Porosity 8% 15 – 20%
9

ELEKTRA
Heating Cables
• If heating cables are meant as the primary
heating system, users will aim at achieving an
optimal level of room air temperature – then
temperature controllers are required with air
temperature measurement functionality,
i.e.acontroller with an air sensor and
limiting oor sensor (this controller type will
measure air temperature, and simultaneously
its oor sensor will protect oor and cable
from overheating).
For temperature control, manual controllers
maintaining steady temperature levels can be
applied, as well as programmable controllers
with daily or weekly temperature programming
options.
Heating system
Temperature controller type
Manual Programmable
Primary —
ELEKTRA
MWD5 WiFi
MCD5 1999
ELR 20
Secondary
(warm oor)
ELEKTRA
OTN 1991
ELEKTRA
MWD5 WiFi
MCD5 1999
ELR 20
Temperature controllers can be placed in a
common frame with a light switch (not UK)
Temperature
sensor
10