Installation Manual

The Purpose of Danfoss RX Heating Cables:
The RX de-icing cable is designed to prevent ice dams from forming on roofs and in gutters and
downspouts. When used and installed according to this manual, the RX system provides a path for
melted snow and ice to drain from the roof.
The Danfoss RX system is not designed to remove ice dams that have already formed, nor should it
be used for clearing the entire roof of snow.
Danfoss RX cables are not designed for anything but roof and gutter ice protection. Danfoss has
other products ideal for ground snow melting and pipe tracing. Consult your local distributor,
www.DanfossLX.com or call toll-free 1-866-676-8062 for further information.
A Timely Installation:
Do not install the RX heating system during the winter months or when snow or ice is present. As
the cables are clipped onto shingles using special clips, care must be taken not to damage the roof
shingles.
If ice dams, snow or ice are present, consult a professional roofing company for skilled advice.
Ideal installation temperature range (to prevent damage to shingles from tearing at hot
temperatures or cracking at cold temperatures when attaching the clips):
32°F - 80°F (0°C - 27°C).
Where should I heat my roof?
Typically heating cables are installed where ice dams tend to form, such as where snow and/or ice
are present below an area with melted snow. These areas are dependant on exposure to sunlight,
wind directions, and the shape of the roof. Ice dams may also form in a roof valley, around a dormer,
skylight or above the gutter. It may be necessary to only heat the gutter and downspout if no ice
dams have formed on the roof.
General Information and Planning
Refer to Appendix A to estimate the required cable length for your application.
Table 2 - Breaker Sizing: Required Current for RX De-icing Kits
Cable Sizing
Required Current (Amps)
1.4
4.5
2.6
3.3
3.8
6.3
9.0
10.2
Catalog Number:
088L3500
088L3505
088L3502
088L3503
088L3504
088L3508
088L3510
088L3511
4
TEL: [phone]. FAX: [phone]
Copyright 2009 Danfoss Inc.
088L3371- 07/2009