background image

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.

The tekmar Limited Warranty to the Purchaser on the Products sold hereunder is a manufacturer’s pass-through 
warranty which the Purchaser is authorized to pass through to its customers. Under the Limited Warranty, each 
tekmar Product is warranted against defects in workmanship and materials if the Product is installed and used 
in compliance with tekmar’s instructions, ordinary wear and tear excepted. The pass-through warranty period is 
for a period of twenty-four (24) months from the production date if the Product is not installed during that period, 
or twelve (12) months from the documented date of installation if installed within twenty-four (24) months from 
the production date.

The liability of tekmar under the Limited Warranty shall be limited to, at tekmar’s sole discretion: the cost of parts 
and labor provided by tekmar to repair defects in materials and / or workmanship of the defective product; or to the 
exchange of the defective product for a warranty replacement product; or to the granting of credit limited to the 
original cost of the defective product, and such repair, exchange or credit shall be the sole remedy available from 
tekmar, and, without limiting the foregoing in any way, tekmar is not responsible, in contract, tort or strict product 
liability, for any other losses, costs, expenses, inconveniences, or damages, whether direct, indirect, special, sec-
ondary, incidental or consequential, arising from ownership or use of the product, or from defects in workmanship 
or materials, including any liability for fundamental breach of contract.

The pass-through Limited Warranty applies only to those defective Products returned to tekmar during the warranty 
period. This Limited Warranty does not cover the cost of the parts or labor to remove or transport the defective 
Product, or to reinstall the repaired or replacement Product, all such costs and expenses being subject to Purchaser’s 
agreement and warranty with its customers.

Any representations or warranties about the Products made by Purchaser to its customers which are different from 
or in excess of the tekmar Limited Warranty are the Purchaser’s sole responsibility and obligation. Purchaser shall 
indemnify and hold tekmar harmless from and against any and all claims, liabilities and damages of any kind or 
nature which arise out of or are related to any such representations or warranties by Purchaser to its customers.

The pass-through Limited Warranty does not apply if the returned Product has been damaged by negligence 
by persons other than tekmar, accident, fire, Act of God, abuse or misuse; or has been damaged by modifica-
tions, alterations or attachments made subsequent to purchase which have not been authorized by tekmar; or 
if the Product was not installed in compliance with tekmar’s instructions and / or the local codes and ordi-
nances; or if due to defective installation of the Product; or if the Product was not used in compliance with  
tekmar’s instructions.

THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, WHICH THE GOVERNING LAW 
ALLOWS PARTIES TO CONTRACTUALLY EXCLUDE, INCLUDING, WITHOUT LIMITATION, IMPLIED WARRANTIES OF 
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, DURABILITY OR DESCRIPTION OF THE PROD-
UCT, ITS NON-INFRINGEMENT OF ANY RELEVANT PATENTS OR TRADEMARKS, AND ITS COMPLIANCE WITH OR 
NON-VIOLATION OF ANY APPLICABLE ENVIRONMENTAL, HEALTH OR SAFETY LEGISLATION; THE TERM OF ANY 
OTHER WARRANTY NOT HEREBY CONTRACTUALLY EXCLUDED IS LIMITED SUCH THAT IT SHALL NOT EXTEND 
BEYOND TWENTY-FOUR (24) MONTHS FROM THE PRODUCTION DATE, TO THE EXTENT THAT SUCH LIMITATION IS 
ALLOWED BY THE GOVERNING LAW. 

Product Warranty Return Procedure

 All Products that are believed to have defects in workmanship or materials 

must be returned, together with a written description of the defect, to the tekmar Representative assigned to the 
territory in which such Product is located. If tekmar receives an inquiry from someone other than a tekmar Repre-
sentative, including an inquiry from Purchaser (if not a tekmar Representative) or Purchaser’s customers, regarding 
a potential warranty claim, tekmar’s sole obligation shall be to provide the address and other contact information 
regarding the appropriate Representative.

IOM-T-681   2139

 

© 2021 tekmar

Tel: 1-800-438-3903 • Fax: (250) 984-0815

 tekmarControls .com

All specifications are subject to change without notice

Need help? Go to our website or contact us.

tekmarControls.com | [email protected] | 1-800-438-3903  

Limited Warranty and Product Return Procedure

Summary of Contents for tekmar 681

Page 1: ...e 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 ...

Page 2: ...tected True False with Snow Ice Sensor 090 15 Snow Detected True False with Snow Sensor 095 16 Snow Detected True False with Snow Sensor 095 and Slab Sensor 072 16 Slab Temperature 16 Outdoor Temperature 16 Multiple Zones 17 Warm Weather Shut Down 17 Cold Weather Cut Off 17 Slab Target 17 Troubleshooting Error Messages 18 19 Technical Data 19 Limited Warranty and Product Return Procedure 20 Congra...

Page 3: ...d with a signal word DANGER WARNING or CAUTION a pictorial and or a safety message to identify hazards When you see this symbol alone or with a signal word on your equipment or in this manual be alert to the potential for death or serious personal injury This pictorial alerts you to electricity electrocution and shock hazards This symbol identifies hazards which if not avoided could result in deat...

Page 4: ...kaging Contents Front View Side View 19 32 33 mm Mounting Base 611 32 161 mm 51 8 130 mm 1 46 37 mm Choose the placement of the 681 early in the construction process to enable proper wiring during rough in Installation Location NOTICE Keep the 681 dry Avoid potential leakage onto the 681 Maintain relative humidity less than 90 in a non condensing environment Avoid exposure to extreme temperatures ...

Page 5: ...mounted on DIN rail back view Low Voltage Wiring Pull two conductor 18 AWG cable up to 500 feet 150 m long for the following equipment Outdoor temperature sensor Optional Pull four solid conductor 18 AWG cable up to 500 feet 150 m long for the following equipment Snow Sensor 095 Pull five solid conductor 18 AWG cable up to 435 feet 132 m long for the following equipment Snow Ice Sensor 090 Rough I...

Page 6: ...AS is not providing an outdoor air sensor Connect the Outdoor Sensor 070 sold separately to terminals 6 and 7 If the BAS has an outdoor air sensor this data can be shared with the 681 through BACnet 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 3...

Page 7: ...ct the A terminal on the BAS network to the RS 485 A terminal 8 Connect the B terminal on the BAS network to the RS 485 B terminal 9 Connect the ground G on the BAS network to the RS 485 Ref terminal 10 Communication Wiring The 681 is shipped pre programmed with com mon settings The 681 has an Installer access level that allows full access to all settings and a User access level that restricts the...

Page 8: ...8 Snow detected status Go to menu selection screen Snow detected symbol Home Screen BACnet status Snow Ice status Slab Temperature status Outdoor Temperature status User Interface ...

Page 9: ... when the out door temperature is below the CWCO temperature setpoint The 681 communicates to the BAS to signal snow or ice is not detected due to cold temperature WWSD is shown when the out door and slab temperature are above the WWSD temperature setpoint During WWSD the snow will melt naturally due to warm temperatures The 681 communicates to the BAS to signal snow or ice is not detected due to ...

Page 10: ...095 detects moisture The Snow Ice Sensor 090 or Snow Sensor 095 has detected moisture but this condition does not warrant snow melting to turn on The Snow Ice Sensor 090 temperature is above 120 F 49 C while the snow sensor heater is able to operate MELT PENDING WATER DETECTED SENSOR OVERHEATED ...

Page 11: ...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 Error Screen ...

Page 12: ... snow melting system is shut off during extremely cold weather Below this temperature the heat loss of the slab exceeds the capacity of the boiler or heating appliance 30 to 50 F Off 34 0 to 10 0 C 10 F 12 C Installer WARM WEATHER SHUT DOWN WWSD Select the temperature above which the snow melting system is shut off during warm weather This allows the snow or ice to melt off the slab naturally Auto...

Page 13: ...cess level This determines which menus and items are available through the user interface User Installer User User Installer UNITS Select if temperature is displayed in F or C F C F User Installer INFORMATION Product information F C SD Card Uptime BAS Outdoor Time Slab Target Slab Temperature Snow Detect Pending Snow Detect in Reset Installer LOAD FACTORY DEFAULT Select Yes to reload the factory d...

Page 14: ... of the RS 485 data bus 2400 9600 19k2 38k4 57k6 76k8 115k 76800 Installer Sensors Menu Description Range Default Access SNOW ICE Select if a Snow Ice Sensor 090 In slab or a Snow Sensor 095 Aerial is installed In Slab Aerial In Slab Installer OUTDOOR Current outdoor air temperature Select if the outdoor air temperature is measured by the outdoor local sensor or provided by the BAS Local BAS BAS I...

Page 15: ...ch snow or ice may be pres ent When moisture is detected the 681 shows Snow Detected True in the Home Screen When the sensor is dry and the slab is up to tar get temperature the 681 will transition to Snow Detected False Snow Ice Sensor 090 Snow Detected True False Operation with the Snow Ice Sensor 090 Snow Detected True The 681 communi cates to the BAS to signal snow or ice is detected Snow Dete...

Page 16: ...s that either a Snow Ice Sensor 090 or a Slab Sensor 072 is installed The Snow Ice Sensor contains a built in slab temperature sensor while the Aerial Snow Sensor 095 requires the Slab Sensor 072 The 681 continually monitors the sensors for the slab tem perature conditions This value is communicated to the BAS through BACnet MS TP to cycle the heat source and the mixing device to control the slab ...

Page 17: ...erature exceeds the WWSD setting by 1 F 0 5 C and when the slab temperature exceeds 34 F 1 C The 681 exits WWSD when the outdoor air temperature falls 1 F 0 5 C below the WWSD setting or if the slab temperature falls below 34 F 1 C This allows the Melting Setpoint setting to be set higher than the WWSD This is useful when high slab temperatures are required to melt the snow or ice Maintaining the ...

Page 18: ...n the BAS menu OUTDOOR SENSOR ERROR The Interface is unable to read the Outdoor Sensor 070 This error also occurs when the BAS sys tem has failed to communicate the outdoor temperature for more than 30 minutes The Interface assumes an outdoor temperature of 32 F 0 C Check the outdoor sensor wire according to the sensor installation manual It may be necessary to replace the outdoor sensor Once the ...

Page 19: ...n the bundle configuration Optional tekmar type 070 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 SNOW ICE SENSOR ERROR The Interface is unable to pro...

Page 20: ... customers which are different from or in excess of the tekmar Limited Warranty are the Purchaser s sole responsibility and obligation Purchaser shall indemnify and hold tekmar harmless from and against any and all claims liabilities and damages of any kind or nature which arise out of or are related to any such representations or warranties by Purchaser to its customers The pass through Limited W...

Reviews: