Retro-DWS Installation
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Optional to
extend heating
cable into tank
HLA-120
H
E
A
T
°
W
E
D
AY
PM
Retro-DWS
Waste pipe
Insulation
Septic tank
HLA-120
H
E
A
T
°
W
E
D
AY
PM
HLA-120
thermostat
Note:
Heater into tank is optional
and not required in every install
Thermostat sensor
on coldest section
of pipe
DWS-GFC Installation
with HLA-120 Thermostat
Control Devices and Insulation Installation
Control devices are not required to operate the heating
cable system. They can be added for energy efficiency.
Thermostats
are used to duty cycle the system in an on/
off operation saving power consumption and maintain a
certain pipe temperature. A sensor lead must be placed on
the coldest section of pipe.
Timers
are used to duty cycle the system in an on/off
operation based on preset time intervals to save on power
consumption.
Insulation
is recommended for all new pipe installations,
even where the pipe is to be buried.
For existing pipe applications, insulation is only required
where the pipe is exposed to ambient outdoor tempera-
tures, and/or where the pipe is above the ground. Insulation
aids in heat retention making the heating cable more energy
efficient and providing cold weather reliability.
