Description

Tekmar 671 Snow Melting Control – Pulse Width Modulation

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 degrees F (25 degrees C plus / minus 0.2 degrees C) Beta=3892
• Snow Melting Control Type – Snow Detector and Melting Control

Installation Manual