ELEKTRA VCD10, Installation Manual

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ELEKTRA
Heating Cables
Installation of the higher output (per 1 m
2
) is nec-
essary if the floor warm-up time is to be reduced,
also if the heating system is not designed to oper-
ate continuously e.g. in hotel rooms, offices 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 floorings 6cm 7 cm 10 cm
PVC 7cm 8 cm 12 cm
Wood, fitted 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
floor heating:
• anhydrite screed – with the advantages of
short curing time (approx. 7 days), as well as
insignificant linear shrink and low porosity.
Large areas can be covered with this type
of screed (up to 300 m
2 ), with no need for
expansion joints. Owing to low porosity, the
screed will efficiently transfer heat and the
floor 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 floors larger than
30 m
2
, when the side length exceeds 6 m,
expansion joints must be provided.
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