Below are several downloadable documents about Thermostats and Insulation:
The use of a thermostat is optional with all Heat-Line self-regulating freeze protection systems. Heat-Line thermostats are designed to duty cycle the heating system in an ON/OFF operation. Depending on application, thermostats and insulation combined can improve performance and optimize energy efficiency by as much as 80 percent.
Heat-Line offers three thermostats, the GF-Stat, HLJ-STAT and KHL-STAT
GF-STAT - C-UL-US listed, NEMA 4X protection, 120 volt or 240 volt supply voltage, to be hard wired. Complete with integral 30 mA GFEP and 20' sensor lead (up to 500' available). The thermostat comes pre-set to maintain the Heat-Line system at 50°F / 10°C.
HLJ-STAT - UL listed, NEMA 1 General Purpose, 120 volt plug in device which requires no field wiring, complete with an 18 foot sensor lead. The thermostat comes pre-set to maintain the Heat-Line system at 50°F / 10°C.
KHL-STAT - Thermostat for use with Kompensator low voltage heating cables only.
For additional information please see "Energy Saving Tips"
One extremely important feature of self-regulating heating cables is the fact they can be thermally insulated without overheating concerns. The use of insulation tremendously reduces the required amount of heat (energy) required to keep a pipe from freezing. A thermally insulated pipe is not as susceptible to freezing and temperature change. The insulation creates better thermal consistency throughout the pipe and increases energy efficiency.
Heat-Line offers a closed cell polyethylene insulation sleeve which has a ¾" thick wall which provides an R-value of 4. Each sleeve comes pre-scored with a self-sealing feature in 6' lengths to fit 1" and 1 ¼" internal diameter pipes. Other insulation types are available for different pipe sizes and applications.
Depending on application, combining insulation and thermostatic control can increase energy savings by as much as 80%.
Do you require insulation?
Any section of pipe above the ground protected by a Heat-Line system is required to be thermally insulated.
In all new applications where freeze protected water pipe is being installed it is recommended insulation be added before the pipe is buried.
NOTE: For lake or river applications, insulation is only required to the water's edge (at low water mark).