Installation & Operation Manual
RX Kits - 120V
Part
Numbers
Appendix A
Fig. A
EXAMPLE:
24' (7.32 m) roof with
overhang
24" (61 cm) use
multiplier 2.7 i.e.
Cable length =
24' (7.32 m) x 2.7
= 64.8' (19.8 m)
No dormers exist on this
roof
2 Valleys x 6' (1.83 m) =
12' (3.66 m)
24' (7.32 m) gutter with
1 down
spout, 10' (3.05 m) in
height
= 24' (7.32 m) x 1 =
24' (7.32 m)
and 1 x (2 x 10' (3.05 m))
= 20' (6.1 m)
Therefore total cable:
64.8' (19.8 m) +
12' (3.66 m) + 24'
(7.32 m) + 20' (6.1 m)
= 120.8' (36.8 m)
(088L3505)
12 | © Danfoss | FEC | 2020.02
Part No
Length
088L3500
30' (9.14 m)
088L3502
65' (19.8 m)
088L3503
80' (24.3 m)
088L3504
100' (30.5 m)
088L3505
100' (30.5 m)
088L3507
150' (45.7 m)
088L3508
170' (51.8 m)
088L3509
200' (61.0 m)
088L3510
230' (70.1 m)
088L3511
265' (80.8 m)
Each kit comes with 10 spacer clips as standard.
Find the Required Cable Length
Table 1 - Summary of Cable Lengths
Item
Roof Edge (Fig.A)
Dormer Perimeter
Roof Valley
Gutter
Downspout
Table 2 - Cable Length Multipliers and Roof Overhang
Eave Overehang "O"
12" (30.5 cm)
4" (10.2 cm)
36" (91.4 cm)
48" (122 cm)
See Figure A for standard roof.
Table 3 - Cable Length Calculations
Section
1. Roof
2. Dormers
3. Valleys
4. Gutters*
5. Downspouts
For gutters more than 4" (10.5 cm) wide, make two traces of RX cable in the gutter, ie multiply those gutter lengths
*
with widths >4" (>10.5 cm) by 2.
Remember to make accurate measurements of the roof, overhang, gutters, valleys, and downspouts to enter into
the table above.
RX Kits. For roof and gutter deicing applications
Watts
170
310
390
455
535
700
760
920
1080
1220
Required Cable Length
See Table 2
1' (0.31 m) per linear foot
6' (1.83 m) minimum
1' (0.31 m) per linear foot gutter
2' (0.61 m) per linear foot of downspout
Loop Height "H"="O"+6
18" (45.7 cm)
30" (76.2 cm)
42" (107 cm)
54" (137 cm)
Calculation
______ x ________
Length x Multiplier
_______ x _____________________
Number x (sum up, over and down)
______ x __6' (1.83 m)__
Number of x 6' (1.83 m)
______ x __1' (0.31 m)__
Length x 1' (0.31 m)
_________ x _________
Number of x (2 x height)
Danfoss
P: 1-888-DANFOSS (326-3677)
F: (416) 352-5981
W: www.LX.Danfoss.com
Amps
Ohms
1.4
85.4
2.6
46.9
3.3
37.0
3.8
32.2
4.5
26.9
5.8
20.6
6.3
19.0
7.7
15.6
9.0
13.3
10.2
11.8
Remarks
Multiplier depends on roof overhang
1' (0.31 m) per linear foot
Per valley 3' (0.91 m) up, 3' (0.91 m)
down
Measure gutter length
Cable loops down and up
Roof Multiplier
1.9
2.7
3.6
4.6
Cable Length
Total __________
AQ00008644904301-010201 / 088L3371
No. Shingle
Clips / Kit
25
25
50
50
50
75
100
100
100
125