Watts Tekmar Snow Melting Control 654

Snow Melting Control 654

The Snow Melting Control 654 is engineered to efficiently operate electric or hydronic equipment, effectively melting snow or ice from various surfaces including driveways, walkways, patios, and commercial spaces like business entrances, parking ramps, and loading docks. It offers automatic control over surface temperatures to optimize energy usage and minimize operating costs.

Key Features:

  • Automatic snow/ice detection supports both in-slab and retrofit aerial sensors, ensuring reliable performance in diverse environments.
  • Manual start with timer and programmable schedule for flexible operation tailored to specific needs.
  • Compatible with tekmarNetĀ® communication for seamless integration and control.
  • Warm weather shut down and cold weather cut-out features enhance system efficiency and protect against unnecessary operation.
  • Supports snow melt zoning with priority and tandem snow/ice detection for targeted and effective snow melting.
  • Provides slab protection and storm features for enhanced durability and performance in challenging conditions.
  • Includes EconoMelt function and manual override for added control and convenience.
  • Features snow melt zone tracking, scenes, and Away key functionality for comprehensive management options.
  • Electric systems require a separate GFCI and electrical relay contactor, while isolation relays are necessary to operate line voltage pumps.


Ambient Conditions -4 to 122 degree F (-20 to 50 degree C), less than 90 percent RH non-condensing, outdoor use permitted when installed
Control Type Microprocessor control, this is not a safety (limit) control
Dimensions 5″ H x 3-1/4″ W x 15/16″ D (127 x 82 x 23 mm)
Enclosure Material White PVC plastic
Enclosure NEMA Rating NEMA 1
Modulating Output 0-10 V (dc), 500 ohms minimum load impedance, 4-20 mA 1 k ohms max load impedance
Power Supply 24 V (ac)plus / minus 10 percent, 60 Hz, Class 2, 16 VA standby, 100 VA fully loaded
Relay Capacity 24 V (ac) 2 A, 3.6 A combined
Sensor NTC thermistor, 10 k ohms at 77 degree F (25 degree Cplus / minus 0.2 degree C) Beta =3892