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Installation & Operation Manual 

RX Kits. For roof and gutter deicing applications 

 

12 | © Danfoss | FEC | 2020.02

AQ00008644904301-010201 / 088L3371

RX Kits - 120V 
Part 
Numbers

Each kit comes with 10 spacer clips as standard.

Find the Required Cable Length

Item

Required Cable Length 

Remarks

Roof Edge (Fig.A)

See Table 2

Multiplier depends on roof overhang

Dormer Perimeter

1’ (0.31 m) per linear foot

1’ (0.31 m) per linear foot

Roof Valley

6’ (1.83 m) minimum

Per valley 3’ (0.91 m) up, 3’ (0.91 m) 
down

Gutter

1’ (0.31 m) per linear foot gutter

Measure gutter length

Downspout

2’ (0.61 m) per linear foot of downspout

Cable loops down and up

Table 1 - Summary of Cable Lengths

Eave Overehang “O”

Loop Height “H”=”O”+6

Roof Multiplier

12” (30.5 cm)

18” (45.7 cm)

1.9

4” (10.2 cm)

30” (76.2 cm)

2.7

36” (91.4 cm)

42” (107 cm)

3.6

48” (122 cm)

54” (137 cm)

4.6

Table 2 - Cable Length Multipliers and Roof Overhang

See Figure A for standard roof.

Section

Calculation

Cable Length

1.  Roof

______    x    ________ 
Length    x    Multiplier

2.  Dormers

_______    x    _____________________ 
Number    x    (sum  up, over and down)

3.  Valleys

______    x    __6’ (1.83 m)__ 
Number of    x    6’ (1.83 m)

4.  Gutters*

______    x    __1’ (0.31 m)__ 
Length    x    1’ (0.31 m)

5.  Downspouts

_________    x    _________ 
Number of    x    (2 x height)

Total __________

Table 3 - Cable Length Calculations

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.

Appendix A

Fig. A

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)

EXAMPLE:

*

Remember to make accurate measurements of the roof, overhang, gutters, valleys, and downspouts to enter into 

the table above.

Danfoss 

P: 1-888-DANFOSS (326-3677) 

F: (416) 352-5981 

W: www.LX.Danfoss.com

Part No

Length

Watts

Amps

Ohms

No.  Shingle 

Clips / Kit

088L3500

30’ (9.14 m)

170

1.4

85.4

25

088L3502

65’ (19.8 m)

310

2.6

46.9

25

088L3503

80’ (24.3 m)

390

3.3

37.0

50

088L3504

100’ (30.5 m)

455

3.8

32.2

50

088L3505

100’ (30.5 m)

535

4.5

26.9

50

088L3507

150’ (45.7 m)

700

5.8

20.6

75

088L3508

170’ (51.8 m)

760

6.3

19.0

100

088L3509

200’ (61.0 m)

920

7.7

15.6

100

088L3510

230’ (70.1 m)

1080

9.0

13.3

100

088L3511

265’ (80.8 m)

1220

10.2

11.8

125

Summary of Contents for RX Kits

Page 1: ...tallation Operation Manual Manuel d installation et d utilisation RX Kits Kits RX For roof and gutter deicing applications Pour les applications de d givrage de toiture et goutti re EN FR LX DANFOSS C...

Page 2: ...le of Contents Welcome Kit Contents 04 Specifications 04 General Information and Planning Sizing 05 Installation Instructions 05 Roofline Pattern 07 Skylight Pattern 07 Dormer Pattern 08 Valley Patter...

Page 3: ...arning labels in the appropriate area THIS RX KIT CONTAINS 1 Heating Cable 2 Shingle Clips 3 Warning Labels 4 6 ft power lead 5 Spacer Clips 6 Instruction Manual The installer of the Danfoss RX heatin...

Page 4: ...X heating cables can result in bodily harm property damage and fire Cable modification will render the warranty null and void and the manufacturer carries no further responsibility for the product Gen...

Page 5: ...installation begins Making a drawing of the roof and then chalking the cable locations on the roof surface may be helpful Remember to always exercise caution when on a ladder or roof See Appendix A to...

Page 6: ...167 6 cm 12 66 to 72 167 6 cm to 182 9 cm 13 Table 3 Triangle Heights Based upon standard shingle row height of 5 14cm The spacing at the base and top of each triangle should be 15 38 1 cm point to po...

Page 7: ...ent the formation of ice dams Figure 6 Cable routed back along the roof line in the gutter and downspouts Dormer Pattern Valley Pattern Other areas If a gutter is present all gutters below heated area...

Page 8: ...ings Double runs of RX cables may be used when ice problems are only present in the gutters Figure 7 CAUTION Install such that the heating cable does not touch overlap or cross itself Figure 7 Double...

Page 9: ...tom of triangles along roof edge Create a drip loop over the edge of the roof leaving at least 2 between the bottom of the drop loop and the gutter bottom Figure 10 Figure 11 Top of Triangles lift the...

Page 10: ...ranty DANFOSS RX KIT WARRANTY For a period of five 5 years from the date of purchase Danfoss warrants that the Danfoss RX Kit is free from defects in material design and workmanship The warranty is on...

Page 11: ...ers ______ x __1 0 31 m __ Length x 1 0 31 m 5 Downspouts _________ x _________ Number of x 2 x height Total __________ Table 3 Cable Length Calculations For gutters more than 4 10 5 cm wide make two...

Page 12: ...ques techniques 14 Informations g n rales et planification dimensionnement 15 Instructions d installation 15 Configuration de la ligne de toit 17 Configuration de la fen tre de toit 17 Configuration d...

Page 13: ...Danfoss RX L installateur des c bles chauffants Danfoss RX doit bien conna tre les m thodes d installation d crites dans ce guide ainsi que les conventions relatives au c blage lectrique L installatio...

Page 14: ...l par un interrupteur marche arr t avec voyant lumineux Il doit tre pourvu d une protection contre les d fauts de terre provenant d autres sources et d un raccordement lectrique situ dans une zone pro...

Page 15: ...505 120 540 4 5 26 9 088L3507 150 700 5 8 20 6 088L3508 170 755 6 3 19 0 088L3509 200 920 7 7 15 6 088L3510 230 1080 9 0 13 3 088L3511 265 1225 10 2 11 8 RX Kits 120V Figure 1 Illustration du toit Ins...

Page 16: ...rdeaux standard de 5 14 cm L espacement la base et au sommet de chaque triangle doit tre de 15 38 cm de point point Figure 2 Les hauteurs de triangle ne doivent pas d passer 20 pieds 6 m tres Elles do...

Page 17: ...Figure 6 Cable routed back along the roof line in the gutter and downspouts Configuration de la lucarne Configuration de la noue Autres zones S il y a une goutti re toutes les goutti res situ es en de...

Page 18: ...ffant en vitant qu il se touche se chevauche ou se croise Figure 7 Double passage de c ble dans les goutti res et les descentes d eau pluviale Remarque Lors du dimensionnement du trac il faut tenir co...

Page 19: ...ong de la bordure du toit Cr ez une boucle d gouttement sur la bordure du toit en laissant au moins 5 cm entre le bas de celle ci et le bas de la goutti re Figure 10 Figure 11 Partie sup rieure de la...

Page 20: ...0 60Hz 10 2A 120V 1225W Garantie GARANTIE DU KIT DANFOSS RX compter de la date d achat Danfoss garantit pour une p riode de cinq 5 ans que le kit Danfoss RX est exempt de d fauts de conception au nive...

Page 21: ...______ x __6 1 83 m __ Nombre de x 6 1 83 m 4 Goutti res ______ x __1 0 31 m __ Longueur x 1 0 31 m 5 Descentes d eau pluviale _________ x _________ Nombre de x 2 x hauteur Total __________ Tableau 3...

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