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Installation, Operation and Maintenance
BACnet Snow/Ice
Sensor Interface 681
WARNING
!
Please read carefully before proceeding with
installation. Your failure to follow any attached
instructions or operating parameters may lead to the
product's failure.
Keep this Manual for future reference.
IOM-T-681
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Table of Contents
Related Manuals for Watts tekmar 681
Summary of Contents for Watts tekmar 681
- Page 1 IOM-T-681 Installation, Operation and Maintenance BACnet Snow/Ice Sensor Interface 681 WARNING Please read carefully before proceeding with installation. Your failure to follow any attached instructions or operating parameters may lead to the product’s failure. Keep this Manual for future reference.
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Page 2: Table Of Contents
Table of Contents Page Important Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Installation Preparation . -
Page 3: Important Safety Information
It is your responsibility to ensure that this control is safely installed according to all applicable codes and standards . Watts is not responsible for damages resulting from improper installation and/or maintenance . This is a safety-alert symbol . The safety alert symbol is shown alone or used with •... -
Page 4: Installation
Installation Tools Required • tekmar or jeweler flathead screwdriver • Needle-nose pliers ® • Screwdriver for mounting hardware • Wire stripper Materials Required • 18 AWG, stranded solid cable (low-voltage connections) • Four #6 or #8 screws Packaging Contents The following are included in the product packaging: •... -
Page 5: Installing The Enclosure
Installing the Enclosure Installation Using Mount Holes and Screws Mounting Screw Secure enclosure using four #6 or #8 Install the front cover by Depress the two snaps wood screws. hooking the top catches on the bottom of the enclosure to release the and pivoting the cover into place. -
Page 6: 681 Electrical Schematic
681 Electrical Schematic Legend S1 = tekmar Snow/Ice Sensor 090 S2 = tekmar Outdoor Sensor 070 (Optional) S3 = tekmar Snow Sensor 095 S4 = tekmar Slab Sensor 072 -A, +B, G: BACnet MS/TP Communication SD Card: FAT 32, 32GB 24 V (ac) ±10%, 50 and 60 Hz, 17 VA Class 2 24 V(ac) MS/TP BAS Connection... -
Page 7: Communication Wiring
Communication Wiring The 681 can be connected to a Building Automation System to automatically operate a snow melting System . The BAS is the system master and the 681 the system slave . BACnet MS/TP communications uses a RS-485 connec- tion . -
Page 8: User Interface
User Interface Home Screen Slab Outdoor BACnet Snow/Ice Temperature Temperature status status status status Snow detected status Snow detected Go to symbol menu selection screen... -
Page 9: 681 Operation
681 Operation SNOW DETECTED: TRUE • The Snow/Ice Sensor 090 or Snow Sensor 095 has auto- matically detected snow or ice . • The 681 communicates to the BAS to signal snow or ice has been detected . SNOW DETECTED: FALSE •... - Page 10 MELT PENDING • Melt Pending is shown when the CWCO is present and the Snow/Ice Sensor 090 or Snow Sensor 095 detects moisture . WATER DETECTED • The Snow/Ice Sensor 090 or Snow Sensor 095 has detected moisture but this condition does not warrant snow melting to turn on .
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Page 11: Error Screen
Error Screen WARNING SYMBOL The 681 has a error message . Press the warning symbol to determine the error code and information on how to take corrective action . Refer to the Troubleshooting section for a list of error codes . -
Page 12: Menu Selection
Menu Selection The 681 has four settings menu: Setpoints, Toolbox, BACnet, and Sensors Back to Home Screen Setpoints Menu Description Range Default Access MELT SETPOINT User 32 to 95°F 36°F Select the desired temperature of the snow melt (0 .0 to 35 .0°C) (2°C) Installer surface when melting . -
Page 13: Toolbox Menu
Toolbox Menu Description Range Default Access VERSION Product: 681 User Software J1297 Installer Version: XXX . ERROR CODE User See Error Code Section The current error code is displayed . Installer ACCESS LEVEL User Select the access level . This determines which User, Installer User menus and items are available through the... -
Page 14: Bacnet Menu
BACnet Menu Description Range Default Access DEVICE ID 0 to 4194302 Installer Select the BACnet device number identification . ADDRESS 0 to 127 Installer Set the BACnet MS/TP MAC address . BAUD RATE 2400, 9600, Select the BACnet-MSTP data communication rate . 19k2, 38k4, 76800 Installer... -
Page 15: Sequence Of Operation
Sequence of Operation Snow Melting Overview Snow Detected: True The 681 communi- A snow melting system can offer a safe, conve- cates to the BAS to nient, and cost effective way of removing snow signal snow or ice is and ice from the snow melting slab and similar detected . -
Page 16: Snow Detected - True/False With Snow Sensor 095
Snow Detected: True/False Operation with the Snow Sensor 095 a timer to ensure all snow and ice has melted from With the Snow Sensor 095 automatic snow/ice the slab . detection occurs . The sensor is aerial mounted on a pole near the melting surface . The 681 includes a Sensitivity setting in the Setpoints menu that allows the installer to adjust The 681 continually monitors the sensor 095 for... -
Page 17: Multiple Zones
Snow Melting System with Multiple Zones Dividing a snow melting system into a num- zones, each zone requires a 681 with a Snow/Ice ber of snow melting zones reduces the size Sensor to detect snow or ice . Each 681 continu- requirements of the hydronic heating plant or the ously monitors one Snow/Ice Sensor 090 or one amperage of the electrical service panel . -
Page 18: Troubleshooting
Troubleshooting It is recommended to complete all wiring to ensure trouble free operation . Should an error occur, simply follow these steps: 1 . Find: If the 681 shows the Warning Symbol on the screen, it is indicating a problem on the system . -
Page 19: Technical Data
Error Messages (2 of 2) continued Description SNOW SENSOR BROWN WIRE ERROR The Interface is unable to read the brown wire connected to sensor . Check the sensor brown and black wires according to the sensor installation manual . Once the error has been corrected, the error message automatically clears . -
Page 20: Limited Warranty And Product Return Procedure
Limited Warranty and Product Return Procedure Limited Warranty The liability of tekmar under this warranty is limited. The Purchaser, by taking receipt of any tekmar product (“Product”), acknowledges the terms of the Limited Warranty in effect at the time of such Product sale and acknowledges that it has read and understands same.