How Summit Ice Melt Systems are Controlled

Summit Ice Melt Systems carries a selection of manual and automated mechanisms to efficiently operate our line of ice melt systems for roofs.  Our in-house panel shop ensures quality and safety at every step of production.

A popular residential favorite is our 4CDC Digital Controller. It is an advanced digital controller that uses a thermistor to determine ambient temperatures.  When the outdoor temperatures drop below a set temperature, the system is automatically energized.  When the outdoor temperature warms again, the system shuts off.

Summit is in the process of perfecting state-of-the-art solid-state single-zone controllers. Check back often for the latest developments.

Click here to learn about our commercial/industrial controllers.

Ultra-HECS Commercial/Industrial Controller data sheet
Ultra-HECS Controller Schematic

summit ice melt systems manufactures roof ice melt system heating controllers

Summit Ice Melt Systems’ Controller Panel Shop


For roof ice melt heating to eliminate ice dams, Summit manufacturers the 4CDC multi-zone ambient controller.

Summit Ice Melt Systems’
4CDC Ambient Sensing Digital Controller

Multi-Zone Controller Features

  • Summit Ice Melt Systems’ Multi-Zone controllers are the perfect match to any residential or small commercial Summit ice melt system installation.  It provides ambient temperature sensing digitally controlled operation for up to 4, 8, or 12 separate heating zones with 30A circuits each.
  • The digital readout provides a very user-friendly interface for users, and allows variations in programming to meet local conditions.
  • NEMA 4 (exterior installation) enclosures are included.
  • Set the controller to “Auto” mode and the system triggers when the temperature drops below a pre-set, field-adjustable temperature setting.
  • Set the controller to “Manual” mode for testing and manual operation.
  • The controller can be programmed for low-temperature cutoff.
  • The indicator light lets you know when the system is energized.
  • The ambient temperature sensor is mounted outdoors in an area typical of the coldest conditions, usually on the north exposure of the building. A built-in alarm notifies the operator if there is an error with the probe or short or open sensor leads.
  • Summit’s Multi-Zone controllers have been engineered and perfected by our Certified UL 508 panel building shop to ensure top performance and safety.
  • Summit’s Multi-Zone controllers provide On/Off/Manual operation of its S1 and S2 (120Vac to 277Vac) self-regulating heater cables by energizing up to 4, 8, or 12 individual branch circuits. Each branch circuit must be protected by a ground fault protection device per the NEC. A 120Vac protected circuit is required to energize the controller.
  • Select Summit’s PLUS ALL-Contactor controllers for greater safety and protection. (See below)

The 4-, 8-, and 12- CDC PLUS ALL-Contactor Controller Features

  • The 4-, 8- 12-CDC PLUS Controllers offer all the features of the STANDARD CDCs but protects all leads to junction boxes with contactor shut off protection. While the NEC permits a controller where only one leg is snapped off by the controller (leaving one hot lead to the junction box), the PLUS ALL-Contactor controller uses additional contactors to snap off all power to the junction boxes.

4 Circuit Controller Guide Multi-Circuit Standard Schematic Multi-Circuit PLUS Schematic 12 to 42 Circuit controller information and SchematicClick Here For Technical Info and Downloads