Description
Tekmar 680 Snow Melting Control – BAS – Boiler & Mixing
Features:
- Idling
- Tandem snow/ice detection
- Slab protection
- Exercising
- Automatic snow/ice detection, supports both in-slab and retrofit aerial sensors
- EconoMelt
- Storm
- Energy monitoring, BACnet or Modbus communication
- Warm weather shut down, cold weather cut off
Specifications:
- Agency Approvals – CSA C US, meets class B: ICES & FCC Part 15
- Ambient Conditions – Indoor use only, 32 to 122 degree F (0 to 50 degree C), less than 90 percent RH non-condensing
- 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
- Boiler Pump Relay – 230 V (ac), 5 A, 1/3 hp
- Boiler Stage Relay -230 V (ac), 5 A
- Communications Type – BACnet IP, BACnet MSTP, Modbus MSTP
- Control Type – Microprocessor control, this is not a safety (limit) control
- Dimensions – 8-1/16″ H x 11-1/8″ W x 2-15/16″ D (204 x 282 x 74 mm)
- Display – 3-1/4″ color touchscreen, 320 x 205 pixels
- Enclosure Material – PC+ABS plastic with steel conduit connection walls
- Enclosure NEMA Rating – NEMA 1
- Floating Mixing Output – 230 V (ac), 5 A
- Flow Sensor – 4-20 mA, 20 V (dc) power supply by control
- Injection Mixing Pump – 230 V (ac), 2.4 A
- Power Supply – 115 V (ac) plus / minus 10 percent, 60 Hz, 43 VA standby, 320 VA max
- Pressure Sensor – 0.5 – 4.5 V (dc) ratiometric, 10k ohms min load, 5 V (dc) power supply by control
- Primary – System Pump Relay – 230 V (ac), 10 A, 1/2 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 Melting Control






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