nvent RAYCHEM H908 Installation Instructions Manual Download

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Clamp

ties

WARNING

Fire and Shock Hazard

Self-regulating electrical

heating cable attached to this pipe:

Disconnect before servicing

Cord label

WARNING

Fire and Shock Hazard

Self-regulating electrical

heating cable attached to this pipe:

Disconnect before servicing

Clamp ties

Drip loop

De-icing

equipment

label

Cord label

Drip loop

• To prevent damage to the ground-fault equipment protection

device and to provide strain relief, use clamp ties to secure

the device to the wall near the receptacle. Be careful not to

damage either the cord or the ground-fault unit.

• The H908 should be mounted high up, away from passersby

to prevent damage to the unit and the risk of shock.

• Include a drip loop as shown to ensure any melt water can

drain off roof

• Plug the heating cable into a 15-A, 120-Vac grounded

outlet approved for wet locations.

• Make sure that:

– Cord label is readily visible.

– Indicator light on the ground-fault equipment

protection device is on.

– Receptacle is properly weatherproofed.

– Ground-fault equipment protection device and power

connection splice will not be submerged.

For pipe freeze protection

For roof and gutter de-icing

• Plug the heating cable into a 15-A, 120-Vac grounded outlet.
• Make sure that:

– Cord label is readily visible.

– Indicator light on the ground-fault equipment

protection device is on.

– Receptacle is properly weatherproofed (if outdoors).

– Ground-fault equipment protection device and power

connection splice will not be submerged.

Note: Pipe must be fully insulated

• To prevent damage to the ground-fault equipment protection

device and to provide strain relief, use clamp ties to secure

the device to the wall near the receptacle. Be careful not to

damage either the cord or the ground-fault unit.

Note: Pipe must be fully insulated.

Securing the Ground-Fault Device

Summary of Contents for RAYCHEM H908

Page 1: ...he black heating cable core is conductive and can short It must be properly insulated and kept dry Keep components and heating cable ends dry before and during installation Damaged bus wires can overheat or short Do not break braid or bus wire strands when scoring the jacket or core Bus wires will short if they contact each other Keep bus wires separated Heat damaged components can short Use a hea...

Page 2: ...1 o clock or 1 o clock position and at the 4 o clock and 8 o clock positions Example 1 Pipe size 1 in Lowest air temp 0 F Insulation thickness 1 2 in Metal pipe WinterGard H311 Plastic pipe WinterGard Plus H611 H621 WinterGard Wet H612 H622 Example 2 Pipe size 2 1 2 in Lowest air temp 20 F Insulation thickness 1 2 in Metal pipe 1 3 WinterGard Plus H611 or WinterGard Wet H612 Use 1 3 feet of heatin...

Page 3: ...before connection 3 Position and attach heating cable to pipe Be sure all piping to be traced is dry Install heating cable using straight tracing spiraling or multiple tracing according to the Heating cable selection and design section on page 2 For straight tracing install the heating cable on a lower half of the pipe for example in the 4 o clock or 8 o clock position Be sure to install the addit...

Page 4: ...ms inspect heating cables for signs of damage and verify the components are correctly installed If physical damage is found the entire damaged section must be removed and a new section of heating cable spliced in using only approved H910 splice kits If physical damage cannot be found the complete circuit should be removed and replaced with new heating cable To verify the ground fault circuit is fu...

Page 5: ... gutter and downspout The cable running in the gutter should remain against the bottom of the gutter Extend the top of each heating cable loop beyond where the wall joins the roof nVent recommends 2 foot clip spacing along the roof edge See the Heating cable design section Table 5 for spacing and layout information Use WinterGard H913 H914 roof clips to attach heating cable to the roof surface One...

Page 6: ...If physical damage is found the entire damaged section must be removed and a new section of heating cable spliced in using only approved H910 splice kits If physical damage cannot be found the complete circuit should be removed and replaced with new heating cable To verify the ground fault circuit is functioning test the H908 before each use Push in the test button The indicator light must turn of...

Page 7: ...atherproofed outlet approved for wet locations H913 H914 Roof clip H910 Tee End seal Clamp ties two places Clamp ties two places Power connection splice included with the H908 H908 Ground fault equipment protection device Weatherproofed outlet approved for wet locations Drip loops Drip loop Drip loop Note In all locations route and secure cable to avoid possible mechanical damage such as from ladd...

Page 8: ...nd wire Plug in cord 3 in Note Instructions generally show heating cable with braid and outer jacket Cables with no outer jacket look slightly different from those illustrated H908 POWER CONNECTION KIT Identify heating cable Stripped end of ground fault protection device 5 in tube 8 in tube 2 3 4 in 1 2A For all heating cables For H311 and H611 heating cables only Slide 8 inch tube and 5 inch tube...

Page 9: ...cket Score between bus wires at inner jacket Bend core to break free at inner jacket Peel core and any remaining material from bus wires Notch core at the end Twist back and peel bus wires from core Slide 1 8 inch x 1 inch shrink tubes over bus wires To shrink tubing move heat source continuously from side to side While shrinking ensure that tubes remain up against black core Trim bus wires For H6...

Page 10: ...e black wire Finish bus wire preparation Apply 5 inch shrink tube Connect bus wires Apply mastic to bus wires Trim bus wires Squeeze the mastic together Center the 5 inch heat shrinkable tube over the splice Make sure tube extends over the end of each heating cable and the cord Shrink the tube completely Start at the middle and work toward each end Keep heating after tube has shrunk to melt mastic...

Page 11: ...ect braid to ground wire Wrap black cloth tape evenly around crimp and splice Cover crimp completely Center the 8 inch heat shrinkable tube over the splice Make sure that the tube extends over the end of the heating cable and cord Shrink the tube completely Start at the middle and work toward each end Keep heating after tube has shrunk to melt adhesive inside tube Total heating time should be abou...

Page 12: ... braid Firmly push end seal onto the cable at least 11 2 inches Some gel may ooze out Do not twist or try to remove the end seal during or after insertion Do not reuse an end seal Firmly push end seal onto the cable at least 11 2 inches Some gel may ooze out Do not twist or try to remove the end seal during or after insertion Do not reuse an end seal Cleanly cut off the end of the cable Push the b...

Page 13: ...pproved for wet locations Make sure that Cord label is readily visible Indicator light on the ground fault equipment protection device is on Receptacle is properly weatherproofed Ground fault equipment protection device and power connection splice will not be submerged For pipe freeze protection For pipe freeze protection For roof and gutter de icing For roof and gutter de icing Plug the heating c...

Page 14: ...ect incidental or consequential Notwithstanding the foregoing nVent shall have no liability whatsoever unless a Buyer promptly notifies nVent in writing after discovery of an alleged nonconformity and includes a detailed explanation of the alleged nonconformity b Buyer promptly returns the goods to nVent postage prepaid at the address obtained by calling Customer Service at 1 800 545 6258 or 650 2...

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