Installation Manual

Find the Required Cable Length
Table 1 - Summary of Cable Lengths
Item Required Cable Length (ft) Remarks
Roof Edge (Fig.A) See Table 2 Multiplier depends on roof overhang
Dormer Perimeter 1’ per linear foot Measure dormer perimeter
Roof Valley 6’ minimum Per valley 3’ up, 3’ down
Gutter 1’ per linear foot gutter Measure gutter length
Downspout 2’ per linear foot of downspout Cable loops down and up
Table 2 - Cable Length Multipliers and Roof Overhang
Eave Overehang “O” Loop Height “H”=”O”+6 Roof Multiplier
12” 18” 1.9
24” 30” 2.7
36” 42” 3.6
48” 54” 4.6
See Figure A for standard roof
Table 3 – Cable Length Calculations
Section Calculation Cable Length (ft)
1. Roof ______ x _________
Length x Multiplier
2. Dormers ______ x __________________
Number of x (sum up, over and down)
3. Valleys _____ x _ 6’’__
Number of x 6’
4. Gutters* _____ x _ 1’__
Length x 1’
5. Downspouts ______ x __________
Number of x (2 x height)
Total __________________
Part Numbers
Appendix A
H
O
RX Kits - 120V
*For gutters more than 4” wide, make two traces of RX cable in the gutter, ie multiply those gutter lengths
with widths >4” by 2.
Remember to make accurate measurements of the roof, overhang, gutters, valleys, and downspouts to enter
into the table above.
Fig. A
EXAMPLE:
24’ roof with overhang
24” use multiplier 2.7 i.e.
Cable length = 24’ x 2.7
= 64.8’
No dormers exist on this
roof
2 Valleys (x6’) = 12’
24’ gutter with 1 down
spout, 10’ in height
= 24’ x 1 = 24’
and 1 x (2 x 10’)
= 20’
Therefore total cable:
64.8’ + 12’ + 24’ + 20’
= 120.8’ (088L3505)
Part No.
Length
(feet)
Watts Amps Ohms
088L3500 30 170 1.4 85.7
088L3502 65 310 2.6 46.2
088L3503 80 390 3.3 36.4
088L3504 100 450 3.8 26.7
088L3505 120 535 4.5 23.1
088L3508 170 760 6.3 19.0
088L3510 230 1080 9.0 13.3
088L3511 265 1220 10.2 11.8
No. Shingle
Clips / Kit
25
25
50
50
75
100
100
125
Each kit comes with 10 spacer clips as standard.
11
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Copyright 2009 Danfoss Inc.
088L3371- 07/2009
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Toronto
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Phone: [phone]
Fax: [phone]
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Danfoss
RX
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