Em4-Cw-Cable Heating System; Additional Items - nVent RAYCHEM EM4-CW Manuel D'installation

EM4-CW-CABLE HEATING SYSTEM (1)

The heating cable "EM4-CW-Cable" is a constant
wattage heating device for a permanent
installation in concrete, screed or sand under
paving slabs.
It is a 400 Vac system regulated by a control unit.
(Control unit provided separately.)
EM4-CW-Cable is a pre-terminated and ready to
install heating cable with 1 cold lead connection
and a power output of 25 W/m of heating cable.
The cold lead cable has a length of 4 m and
should be installed in a conduit.
The minimum cable spacing is 8 cm. With 8 cm
spacing the power output will be 300 W/m².
Spacer, junction box (4) and supply
lead (9)
The plastics fixing strips (VIA-Strips-PL) maintain
the correct spacing of 8-10 cm.
Extension of the cold leads can be made via a
junction box. The connection between the control
panel and the junction box is made by a suitable
supply lead.

ADDITIONAL ITEMS

Conduits (5, 6)
Conduits (not included) are required to
protect the
• cold lead
• sensor connection lead.
Electrical Control Equipment
If nVent standard panels are not used, further
items will be required to complete the system:
• contactors
• circuit breakers
• residual current device (rcd) 30 mA.
• a controller
8 | nVent.com
Controller (8)
nVent offers control units specially designed
for ramp heating applications. They incorporate
combined temperature and moisture sensors to
ensure efficient operation of the system.
Panels (7)
nVent offers a range of standard panels
specifically designed for ramp heating
applications. Each panel contains a built in
control unit, plus circuit breakers and a residual
current device (rcd).
Storage of the cable
• Storage temperature range: –40°C to +45°C
• Store product in a clean, dry place.
Test Equipment
• 2500 Vdc insulation resistance tester (min.
500 Vdc)
• Ohmmeter