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