The Snow Melting Control 650 is designed to operate mechanical equipment to melt snow off of an outdoor slab. It can be used for any single zone electric or hydronic snow melting application that requires manual start/stop operation. This control uses Pulse Width Modulation (PWM) and slab Outdoor Temperature Reset to maintain slab temperature. It is capable of controlling a pump, valve, or electrical contact while reading outdoor air temperature.
CSA C US certified (approved to applicable UL standards)
Cold Weather Cut Off
Manual Override
Slab Outdoor Reset
Temporary Idle
Warm Weather Shut Down
| Control | Microprocessor control. This is not a safety (limit) control |
| Packaged weight | 1.3 lb. (600 g) |
| Dimensions | 4-3/4" H x 2-7/8" W x 7/8" D (120 x 74 x 22 mm) |
| Enclosure | White PVC plastic, NEMA type 1 |
| Approvals | CSA C US, meets class B: ICES & FCC Part 15 |
| Ambient conditions | Indoor use only, -20 to 120°F (-30 to 50°C), RH ≤90% Non-condensing |
| Power supply | 24 V (ac) ±10%, 50/60 Hz, 3 VA, 24 V (dc) ±10%, 0.03 A |
| Relays | 240 V (ac) 10 A, 1/3 hp |
| Sensors | NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C) ß=3892 |
| -Included | Outdoor Sensor 070 and Slab Sensor 072 |
| On time | 0:30 to 19:50 hours to Infinite' |
| Melting | 34 to 45°F (1 to 7°C) |
| Idling | Off, 23 to 34°F (Off, -5 to 1°C) |
| CWCO | Off, -22 to 23°F (Off, -30 to -5°C) |
| Temperature display | Fahrenheit / Celsius |
| Warranty | Limited 3 Year Warranty |
In most cases the current version of literature will work, otherwise use the piece of literature most closely matching the date code of your product.
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Product Submittal |
Jan 2011 - Present |
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Installation & Operation Manual |
Aug 2010 - Present |
Application Brochure |
Aug 2010 - Current |
More advanced application drawings can be found in our Solutions section.