ELEKTRA VCD25, Руководство по установке

Страница: 6 / 38

ELEKTRA
Heating Cables
Note:
Heating cables must be installed according
to the Instructions.
Mains connection of the heating cables should
be performed by an authorized electrician.
!
General information
When protecting external areas from snow and
ice deposition, it is required to assess the required
heat output value per ft
2
(m
2
) of the surface.
Recommended heat output depends on the
regional climate conditions, i.e. minimum
ambient temperature, snowfall intensity
and wind strength.
The output higher than 28 W/ft² (300 W/m²) is re -
quired if the heated area is:
• exposed to low temperatures,
• exposed to wind operation from below:
bridges, stairs, loading ramps, overpasses
• located in regions of intense snowfall.
Ambient
temperature
Heat output
W/ft
2
(W/m
2
)
> 23°F (-5°C)
23°F (-5°C)÷-4°F (-20°C)
-4°F (-20°C)÷-22°F (-30°C)
< -22°F (-30°C)
19 W/ft² (200 W/m²)
28 W/ft² (300 W/m²)
37 W/ft² (400 W/m²)
47 W/ft² (500 W/m²)
Applying insulation layer to the surfaces exposed
to wind operation from below can improve the
effectiveness.
6