Installation Manual

Dormer Pattern:
Place the RX heating cable around the perimeter of the dormer, as in Figure 4.
Figure 4. Dormer Pattern
Valley Pattern
Route the cable a minimum of 3' up and down the valley; lengthen as appropriate for a higher
roof (Figure 5).
Figure 5. Valley Pattern
Other areas:
Other areas of the roof not mentioned here may also be heated using the triangle pattern to
prevent the formation of ice dams.
Gutters and Downspouts:
If a gutter is present, all gutters below heated areas of the roof must have a heating cable run
through to allow for the drainage of melted snow/ice. If a downspout is present along the route of
the gutter, drop the RX cable down and back up the downspout; continue the cable along the
gutter (Figure 6). If the downspout is at the end of the cable route, you need only to run a single
length down the downspout (Figure 6).
CAUTION: Install such that the heating cable does not touch, overlap or cross itself.
Figure 6. Cable routed back along the roof line in the gutter and downspouts
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Copyright 2009 Danfoss Inc.
088L3371- 07/2009