Nelson™ Heat Trace Type AP ambient/contactor controlled 240 Vac (maximum) distribution panel has been specifically designed for use in freeze protection heat tracing systems operating in conjunction with a single control source.
This control source can be in the form of an ambient thermostat, snow sensing controller or any similar device. The ambient distribution panel can operate in two modes, automatically with the use of a control device or in manual override. The panel can be completely turned off during off-season periods.