4
BEFORE INSTALLATION
1. The minimum installation temperature is -20°F
(-20°C).
2. Locating the heating cable on the roof.
A. Loop the heating cable on the overhang area of
the roof. The overhang area is the portion of the roof
which extends beyond the building’s outside wall.
The heating cable loop should extend into the gutter
to maintain a drainage path. It should also extend to
a point 6 inches above the line where the wall joins
the roof. The spacing of the loops should be at 2 foot
intervals. The minimum bending radius is six times
the minor diameter.
B. For flat roofs, the heating cable can be spaced as
appropriate for creating drainage paths.
C. Secure the heating cable to the roof using Warmup
roof clip kits for specified roof and gutter product.
Warmup recommends using two clips to form the
loop that extends over the gutter edge and one clip
to form the loop at the top of the overhang. For flat
roofs, secure the heating cable to the roof with a
clip at 3 foot intervals. See clip instruction sheet for
details.
D. It is recommended that a barrier (snow birds)
or snow fence be mounted on the roof above the
heating cable. This prevents damage to the heating
cable system due to ice slides. If desired, the heating
cable can be attached to the barrier with the Warmup
roof clips.
3. Locating the heating cable in gutters and
downspouts.
A. Run the heating cable in and along the gutter. It
is not necessary to attach the heating cable to the
gutter bottom.
B. When running the heating cable into, or out of the
gutter, use a Warmup roof clip to prevent abrasion of
the cable
C. In downspouts, the heating cable must extend
below the freezing level.
D. The heating cable can be looped in the downspout
if it is convenient to do so, such as when a downspout
is not at the end of a run.
Note
: Tee splices are not
permitted and void agency approvals.
E. Use a Warmup downspout hanger to protect the
heating cable from damage caused by sharp gutter
edges and to provide strain relief.
F. Protect any heating cable which protrudes past the
lower opening of the downspout.
4. Installing the installation accessories.
A. Install all end seals and splices prior to making
power connections.
B. Use only Warmup Installation Accessories. Refer
to the appropriate product literature for the correct
accessory catalog numbers for Power Connection Kit,
Roof Clip Kit, Splice Kit and Hanger Kit.
C. If these kits are not used, or if their instructions
are not followed, then the installation will not comply
with UL.
D. Use only UL Listed weather-proof junction boxes for
power connection.
5. Start-up requirements.
A. The power connection kit contains two caution
labels that must be visibly located. One must be at
the circuit breaker panel, the other on or next to the
ON/OFF control for the cable unit.
B. Prior to energizing the system, make sure the
heating cable is free of mechanical damage (nicks,
cuts, etc.) and thermal damage (solder, overheating,
etc.). Visually check all power connections, splices
and end seals. Perform 2500 VDC meggar check.
The meggar check is performed at the power
connection end of the cable between buss wire
and the grounding braid. The minimum acceptable
reading is 20 megohms. If the installation fails the
meggar test, check end seals, splice connections and
cable sheath for physical damage or areas where the
grounding braid has come in contact with the buss
wires or conductive core.
If physical damage can not be found and end seals
or splices are not the cause, then the complete circuit
should be removed and replaced with new roof and
gutter heating cable.
