Tape or
cable ties
W51 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 covering
1/2" insulation
Pipe label
Tape or
cable ties
W51 heating
cable
12 inches
Waterproof covering
Pipe label
End view
1/2" insulation
3
Figure 1 Straight-traced installation
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 Gardian heating cable design
and compare to materials received to verify
that you have the proper Gardian heating
cable.
• Walk the system and plan the routing of
the Gardian 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, flanges, 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 Gardian length by your
pipe length and multiply by 10. For
example, if you are using a 50 ft Gardian
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 Gardian heating cable to the pipe at
1-foot intervals using H903 fiberglass
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.).
