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Tekmar 671 - WiFi Snow Melting Control, Pulse Width Modulation

The WiFi Snow Melting Control 671 operates hydronic and electric heating equipment designed to melt snow and/or ice from roads and walkways surfaces. The control works with tekmar Snow/Ice Sensor 090 or Snow Sensor 095 to automatically detect snow or ice and operates a single boiler, steam valve or electric cable to supply heat to the slab. The Watts® Home mobile application allows for remote operation and monitoring of the snow melting system from anywhere in the world.

Features:

Automatic software updates
Idling
Economelt
Manual storm
Automatic snow/ice detection
Supports both inslab and retrofit aerial sensors
Supports multiple zones with priority
Cold weather cut off
Warm weather shut down

Specifications

Agency Approvals: CSA C US, meets Class B: ICES & FCC Part 15
Ambient Conditions: -4 to 122 degree F (-20 to 50 degree C), less than 90 percent RH non-condensing, outdoor use permitted when installed inside an NEMA 3 enclosure
Analog Mixing Output: 0-10 V (dc) 500 ohms min impedance / 4-20 mA 1 k ohms max impedance
Boiler Modulation Output: 0-10 V (dc) 500 ohms min impedance / 4-20 mA 1 k ohms max impedance
Communications Type: WiFi 802.11n, 2.4 GHz, WPA2 encryption
Control Type: Microprocessor control. This is not a safety (limit) control
Dimensions: 6-5/8" H x 7-9/16" W x 2-13/16" D (170 x 193 x 72 mm)
Display: 3.5" color touchscreen
Enclosure Material: Blue PVC plastic
Enclosure NEMA Rating: NEMA 1
Floating Mixing Output: 230 V (ac), 5 A
Injection Mixing Output: 230 V (ac), 2.4 A, 1/6 hp, fuse T2.5 A 250V
Manual Melt Call: Short or 0 - 32 V(ac)
Power Supply: 115 V (ac)plus / minus 10 percent, 60 Hz, 20 VA
Relay: 230 V (ac), 5 A, 1/3 hp
Relay Capacity: 230 V (ac) 5 A, 1/3 hp
Sensor: NTC thermistor, 10 k ohms at 77 degree F (25 degree Cplus / minus 0.2 degree C) Beta =3892
Snow Melting Control Type: Snow Detector and Melting Control

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671 - WiFi Snow Melting Control, Pulse Width Modulation