680

The Snow Melting Control 680 is designed to operate electric or hydronic equipment to melt snow or ice from any surface including driveways, walkways, business entrances, parking ramps, loading docks, hospital entrances, helipads and car wash bays. It communicates with Building Automation Systems using BACnet® or Modbus ® for alert notification, remote monitoring and adjustment capability. Up to two snow/ice sensors can be installed, thereby increasing detection area and providing backup redundancy in the case of sensor failure. Upon detection of snow or ice, the 680 operates an electric heating cable, a single hydronic condensing or non-condensing boiler, or a steam valve to provide heat to the snow melt load. The 680 provides boiler return protection by operating a mixing valve or variable speed injection mixing. Monitoring of energy consumption is possible when it is connected to an optional flow sensor.

• Automatic snow/ice detection, supports both in-slab and retrofit aerial sensors
• Energy monitoring, BACnet or Modbus communication
• Warm weather shut down, cold weather cut off
• Exercising
• Tandem snow/ice detection
• Idling
• Storm
• EconoMelt
• Slab protection