Stelpro ProtecTHERM 120V Manuel D'instructions page 3

A. Pipe freeze protection
(Ambient temperature down to -20 °F/-29 °C)
Required material to install heating cable on pipes:
1. Preassembled ProtecTHERM cable.
2. Fiberglass tape (PT-FGT, sold separately) for metal pipes or
aluminum tape (PT-ALUT, sold separately) for plastic pipes.
3. Fire-resistant insulation.
Choosing a cable
Letters A to J represent all ProtecTHERM cables; see legend below.
Pipe Length (ft)
Pipe dia. Type 5' 10' 15' 20' 25' 30' 35' 40' 45' 50' 55' 60' 65' 70' 75' 80' 85' 90' 95' 100' 110' 120' 130' 140' 150'
A B C D E E E F F F G G G G G H H H H H I I J J J
1/2" Met.
A B C E E E E F F F G G G G G H H H H H I I J J J
Plast.
A B C D E E E E F F G G G G G H H H H H I I J J J
1" Met.
B B C D E E E F F G G G G G H H H H H I I I J J –
Plast.
A B C D E E E F F F G G G G G H H H H H I I J J J
1 1/2" Met.
B C D E E F F G G G H H H H I I I J J J – – – – –
Plast.
A B C D E E E F F G G G G G H H H H H I I J J J –
2" Met.
B C E F F G G G H H H I I J J – – – – – – – – – –
Plast.
2 1/2" Met. A B C D E E E F F G G G G G H H H H I I I J J J –
Plast. B D E F G G G H H I I J J – – – – – – – – – – – –
A B
CS061PR006 CS061PR012 CS061PR018
F G
CS061PR050 CS061PR075 CS061PR100
CS062PR050 CS062PR075 CS062PR100
NOTE: For each valve or spigot on pipe, an additional foot of cable is needed.
Pipe
Heating cable
Attaching cable to pipe
1. Prior to installing the cable, be sure all piping is dry, and any sharp
surface is removed.
2. Attach heating cable to pipe with straight, spiraling or multiple tracing.
3. If the heating cable is the same length as the pipe, run it straight along
the bottom of the pipe. If two cables are required, position them in the 4
and 8 o'clock positions. If three cables are required, position them in the
11 o'clock or 1 o'clock positions and 4 o'clock and 8 o'clock positions.
4. If the cable is less than double the pipe length, spiral the cable over the
length of pipe.
5. Any excess cable remaining at the end of the pipe can be doubled back
along the pipe.
6. Be sure to include any additional heating cable required for valves,
spigots, etc.
7. Secure the cable to metal pipe with fiberglass application tape (PT-
FGT, sold separately) or nylon cable ties. Do not use vinyl tape, metallic
products or wire. On plastic pipes, attach the full length of cable with
aluminum tape (PT-ALUT, sold separately).
Make sure the cable is in full contact with the pipe.
ProtecTHERM Instructions Manual
C D E
CS061PR024 CS061PR037
H I J
CS061PR125 CS062PR150
CS062PR125
Valve
Installing thermal insulation
1. Before insulating, inspect the cable to ensure that it is free of mechanical
damage, such as gouges or cuts, etc.
2. Cover the pipe, cables, connections, valves with at least 1/2" (12.7 mm)
thick fiberglass insulation or fire-resistant preformed foam. DO NOT leave
the cables exposed.
3. Make sure the insulation is waterproofed (with polyethylene or other
vapor barriers) in areas where water may come in contact with the
insulation.
4. On the outer surface of the pipe insulation, clearly indicate the presence
of an electric heating cable.
5. After installation is complete, turn the circuit breaker on to give power
to the cable. Standing water inside the pipe should feel warm within
approximately one hour.
Maintenance checks
Only a qualified individual should service or install the system.
Check yearly for any damage to the heating cable and check any ground fault
protection device for proper operation. If any damage to cable is found, DO
NOT operate until it is replaced.
B. Heating cables for roofs, gutters
and downspouts
Required material to install heating cable on roofs:
1. Preassembled ProtecTHERM cable.
2. Roof clips (PT-RC10, pack of 10 or PT-RC50, pack of 50, sold separately).
3. Hanger brackets (PT-RGCH, sold separately) and UV resistant cable ties.
Standard roof
Roof clip
Hanger bracket
Metal roof
Roof clip
Hanger bracket
Choosing a cable
1. Determine the total length of cable needed by adding the total roof
edge length (ft) x the corresponding multiplier in Table 1 according to
the length of the overhang + the roof edge length x 0.5 (length needed
to attach the cable on the roof to the cable running in the gutter) + the
total gutter length (ft), + the total downspout length (+ 1 ft).
2. If the downspout is in the middle of the run, double the length of cable
required for the downspout (add to the previous total).