Instruction Manual

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nVent.com/RAYCHEM | 3
Tape or
cable ties
FG heating
cable
12 inches
Waterproof covering
Pipe label
End view
1/2 in insulation
Figure 1. Straight-traced installation
Tape or
cable ties
FG heating
cable
12 inches
10 feet
Glass tape
(typical)
Heating
cable
Tape after spiraling
heating cable on pipe
Wrap loops in opposite direction
Pull heating cable
loop length
Apply glass tape before
spiraling heating cable on pipe
Waterproof covering1/2 in insulation
Pipe label
Figure 2. Spiral-traced installation
Heating cable installation
1. Prepare for installation.
• Store the heating cable in a clean, dry place.
• Complete piping pressure test.
• Prior to installing the cable, remove any sharp surfaces on
the pipe that might damage the heating cable.
• Review the FrostGuard heating cable design and compare
to materials received to verify that you have the proper
FrostGuard heating cable.
• Walk the system and plan the routing of the FrostGuard
heating cable on the pipe.
2. Position and attach heating cable to pipe.
• Be sure all piping to be traced is dry.
• Install heating cable, using straight tracing Figure 1, or
spiraling Figure 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 additional heating cable required for
valves, anges, etc. as shown in Figures 1 and 2.
• When the design calls for spiraling, begin by suspending
a loop every 10 feet as shown in Figure 2. To determine
the loop length, divide the FrostGuard length by your pipe
length and multiply by 10. For example, if you are using a
50 ft FrostGuard on a 40 foot pipe, leave a 12-foot loop of
heating cable at every 10-foot section of pipe. Grasp the
loop in its center and wrap it around the pipe. Even out the
distance between spirals by sliding the wraps along the
pipe. Use glass tape to secure the center of the loop to the
pipe.
• Fasten FrostGuard heating cable to the pipe at 1-foot
intervals using H903 berglass application tape or nylon
cable ties. Do not use vinyl electrical tape, duct tape, metal
bands, or wire.
• If excess cable remains at the end of the pipe, double it
back along the pipe.
3. Check the installation.
• Prior to installing thermal insulation, make sure the heating
cable is free of mechanical damage (from cuts, clamps,
etc.) and thermal damage (from solder, overheating, etc.).