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680 | Snow Melting Control - BAS, Boiler & Mixing | Tekmar

Brand: TekmarSKU: 680

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Overview Details for 680

Snow Melting Control - BAS, Boiler & Mixing

The Snow Melting Control 680 is designed to operate electric or hydronic equipment to melt snow or ice from any surface including driveways, walkways, business entrances, parking ramps, loading docks, hospital entrances, helipads and car wash bays. It communicates with Building Automation Systems using BACnet^® or Modbus ^® for alert notification, remote monitoring and adjustment capability. Up to two snow/ice sensors can be installed, thereby increasing detection area and providing backup redundancy in the case of sensor failure. Upon detection of snow or ice, the 680 operates an electric heating cable, a single hydronic condensing or non-condensing boiler, or a steam valve to provide heat to the snow melt load. The 680 provides boiler return protection by operating a mixing valve or variable speed injection mixing. Monitoring of energy consumption is possible when it is connected to an optional flow sensor.

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

Item Number	680
Brand	Tekmar
Category	Snow Melting Controls
Agency Approvals	CSA C US, meets class B: ICES & FCC Part 15, BTL Listed
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 degree F (25 degree Cplus / minus 0.2 degree C) Beta =3892
Snow Melting Control Type	Snow Melting Control