Tyco 9800 Plastic Pipe Number of heating cable runs required, Example, English

Table 2. Plastic Pipe

Number of heating cable runs required

Plastic Pipe			Lowest Expected Temperature
Insulation	Pipe Size		20°F	0°F	–20°F	–40°F
Thickness			(–10°C)	(–20°C)	(–30°C)	(–40°C)
1/2"		1/2"	1	2	2
		3/4"	1	2	2	3
		1"	1	2	3	3
		1 1/4"	2	2	3
		1 1/2"	2	3	3
3/4"		1/2"	1	2	2	2
		3/4"	1	2	2	3
		1"	1	2	2	3
		1 1/4"	1	2	3	3
		1 1/2"	2	3	3
1"		3/4"	1	1	2	2
		1"	1	1	2	2
		1 1/4"	1	2	2	3
		1 1/2"	1	2	3	3
		2"	1	2	3	3
1 1/2"		3/4"	1	1	1	2
		1"	1	1	2	2
		1 1/4"	1	1	2	2
		1 1/2"	1	1	2	2
		2"	1	2	2	3

= Increase insulation thickness

1C. Calculate the total length of heating cable required.

Multiply the number of heating cable runs by your pipe length. Add one extra foot (30 cm) for each valve in your line. Add one extra foot (30 cm) for the distance to the power connection. For installations in a crock, add an additional 2 feet (60 cm) of heating cable. After cutting the Frostex heating cable to the length you need, proceed to Step 2.

Example:

Pipe size and material: 1 inch diameter, plastic

Lowest ambient temperature: -20°F (-30°C)

Pipe length:	16 feet (5m)
Valves:	1 ball valve is used

The water connection is in a crock.

From Table 2, Plastic Pipe, for -20°F (-30°C), either two or three runs of Frostex heating cable is required depending on pipe insulation thickness.

Optimal Pipe insulation thickness: 3/4"

Selecting 3/4" thick insulation requires two runs of Frostex heating cable installed along the entire length of the pipe (Table 2).

The total length of heating cable equals:

32 ft (10 m) 2 runs x 16 ft (5 m) of pipe

+1 ft (0.3 m) for one ball valve

+1 ft (0.3 m) for one power connection

+2 ft (0.6 m) for installing in a crock

Total length = 36 ft (11 m)

Note: Do not use more than 50 feet (15 meters) of heating cable per plug. If the total calculated length exceeds 50 feet

(15 meters), you will need additional 9800 FlexFit plugs and outlets. Longer circuit lengths will blow the nonreplaceable fuse in the 9800 FlexFit plug. If you require more than 50 feet per length (15 meters), call Tyco Thermal Controls for informa- tion on other products.

ENGLISH

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