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Tekmar 090 - User Manual

Tekmar 090
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Snow/Ice Sensor 090/094, Sensor Socket 091
Installation & Operation Manual
090
_
D
01/14
Snow Melting
Replaces: 07/09
© 2014
090_D - 01/14
1 of 8
A Watts Water Technologies Company
The tekmar Snow / Ice Sensor 090 / 094
and tekmar Sensor Socket 091 are used
with all tekmar snow / ice melt controls.
The 090 has a 65’ (20 m) cable while the
094 has a 208’ (63 m) cable.
The Snow / Ice Sensor is designed to sit
flush with the slab surface after being
mounted into the Sensor Socket. The
socket is installed directly into the snow
melt slab halfway between the heating
elements or pipes.
The sensor measures the slab temperature,
sensor surface temperature and sensor
surface moisture level.
Snow/Ice Sensor 090/094
Snow/Ice Sensor Socket 091
3–7/16"
(87 mm)
1–3/4"
(45 mm)
3/16"
(5 mm)
090 Cable length 65' (20 m)
094 Cable length 208' (63 m)
Ø 7/8" (22 mm)
3–13/16"
(97 mm)
3–1/8" (80 mm)
3–1/2" (89 mm)
3/4"
(19 mm)
Snow/Ice Sensor 090/094
Automatic snow/ice detection
Slab temperature sensing
Long wire included so in field splicing
is not necessary
Designed for long life in driveway and
walkway installations
For use with tekmar Snow Melting
Control type: 654, 661, 662, 664, 665
or 667.
•
•
•
•
•
Snow/Ice Sensor Socket 091 Features
Provides mounting solution for
Snow/Ice Sensor 090/094
Includes mounting plate
•
•

Table of Contents

Question and Answer IconNeed help?

Do you have a question about the Tekmar 090 and is the answer not in the manual?

Summary

Installation & Operation Manual

Snow;Ice Sensor 090;094 Overview

Details the tekmar Snow/Ice Sensor 090/094, including cable lengths.

Snow;Ice Sensor Socket 091 Overview

Details the tekmar Sensor Socket 091 for mounting the sensor.

Product Features

Lists key features of the Snow/Ice Sensor 090/094 and Socket 091.

Step 1 - Check the Contents

Step 2 - Sensor Installation

Location of the Sensor

Guidance on selecting an optimal location for the snow/ice sensor on the slab.

Conduit Installation

Instructions for running conduit for the sensor cable from socket to control.

Sloped Surface Installation

How to install the sensor on sloped driveways for proper drainage.

Socket Mounting

Details on installing the sensor socket using the provided mounting plate and rebar.

Concrete Installation

Procedures for placing concrete around the sensor socket with a protective plug.

Brick Paver Installation

Recommendations for installing the socket with brick pavers for thermal conduction.

Sensor and Cable Installation

Steps to connect the sensor cable and secure the sensor into the socket.

Existing Socket Placement

Advice for placing the sensor into an existing 091 socket, including screw usage.

Environmental Considerations

Notes on avoiding salt/brine contamination and proper maintenance for sensor performance.

Sensor Maintenance

Guidelines for cleaning the sensor to ensure proper water detection and performance.

Step 3 - Electrical Connections

Step 4 - Test the Sensor

Technical Data

Sensor 090 Specifications

Technical specifications for the Snow/Ice Sensor 090, including dimensions and materials.

Socket 091 Specifications

Technical specifications for the Snow/Ice Sensor Socket 091, including dimensions and included parts.

Sensor 094 Specifications

Technical specifications for the Snow/Ice Sensor 094, including dimensions and cable length.

Limited Warranty and Product Return Procedure

Summary

Installation & Operation Manual

Snow;Ice Sensor 090;094 Overview

Details the tekmar Snow/Ice Sensor 090/094, including cable lengths.

Snow;Ice Sensor Socket 091 Overview

Details the tekmar Sensor Socket 091 for mounting the sensor.

Product Features

Lists key features of the Snow/Ice Sensor 090/094 and Socket 091.

Step 1 - Check the Contents

Step 2 - Sensor Installation

Location of the Sensor

Guidance on selecting an optimal location for the snow/ice sensor on the slab.

Conduit Installation

Instructions for running conduit for the sensor cable from socket to control.

Sloped Surface Installation

How to install the sensor on sloped driveways for proper drainage.

Socket Mounting

Details on installing the sensor socket using the provided mounting plate and rebar.

Concrete Installation

Procedures for placing concrete around the sensor socket with a protective plug.

Brick Paver Installation

Recommendations for installing the socket with brick pavers for thermal conduction.

Sensor and Cable Installation

Steps to connect the sensor cable and secure the sensor into the socket.

Existing Socket Placement

Advice for placing the sensor into an existing 091 socket, including screw usage.

Environmental Considerations

Notes on avoiding salt/brine contamination and proper maintenance for sensor performance.

Sensor Maintenance

Guidelines for cleaning the sensor to ensure proper water detection and performance.

Step 3 - Electrical Connections

Step 4 - Test the Sensor

Technical Data

Sensor 090 Specifications

Technical specifications for the Snow/Ice Sensor 090, including dimensions and materials.

Socket 091 Specifications

Technical specifications for the Snow/Ice Sensor Socket 091, including dimensions and included parts.

Sensor 094 Specifications

Technical specifications for the Snow/Ice Sensor 094, including dimensions and cable length.

Limited Warranty and Product Return Procedure

Overview

  1. Function Description
  2. Important Technical Specifications
  3. Usage Features
  4. Maintenance Features

The tekmar Snow/Ice Sensor 090/094 and Sensor Socket 091 are components designed for use with tekmar snow/ice melt controls, including types 654, 661, 662, 664, 665, or 667. These devices are intended for installation in snow melt slabs to detect snow and ice conditions, enabling automatic activation of the snow melting system.

Function Description

The Snow/Ice Sensor 090/094 is an in-slab sensor that measures three key parameters: slab temperature, sensor surface temperature, and sensor surface moisture level. This allows for automatic snow/ice detection and slab temperature sensing. The sensor is designed to sit flush with the slab surface after being mounted into the Sensor Socket 091. The socket is installed directly into the snow melt slab, ideally halfway between the heating elements or pipes, to ensure representative readings.

Important Technical Specifications

Snow/Ice Sensor 090 (In-slab, 65 ft. (20 m) Wire)

  • Literature: 090_D, 090_C
  • Packaged weight: 4.4 lb (2000 g)
  • Dimensions: 1-3/4" H x 3-7/16" OD (45 mm H x 87 mm OD)
  • Sensor material: Silicon brass
  • Cable Material: 65 ft. (20 m) 5 conductor stranded wire with polyethylene jacket
  • Approvals: CSA C US with tekmar Snow Melting Controls
  • Operating range: -30 to 170°F (-34 to 77°C)
  • Included: 4 #4-40, 7/16" machined, stainless steel screws; 4 #6-32, 3/8" flathead, slotted, stainless steel screws

Snow/Ice Sensor 094 (In-slab, 208 ft. (63 m) Wire)

  • Literature: 090_D, 094_C
  • Packaged weight: 10.4 lb (4762 g)
  • Dimensions: 1-3/4" H x 3-7/16" OD (45 mm H x 87 mm OD)
  • Sensor material: Silicon brass
  • Cable Material: 208 ft. (63 m) 5 conductor stranded wire with polyethylene jacket
  • Approvals: CSA C US with tekmar Snow Melting Controls
  • Operating range: -30 to 170°F (-34 to 77°C)
  • Included: 4 #4-40, 7/16" machined, stainless steel screws; 4 #6-32, 3/8" flathead, slotted, stainless steel screws

Snow/Ice Sensor Socket 091

  • Literature: 090_D, 091_C
  • Packaged weight: 1.5 lbs (670 g)
  • Socket material: Silicon brass
  • Dimensions: 3-13/16" H x 3-1/2" OD (97 mm H x 89 mm OD)
  • Approvals: CSA C US with tekmar Snow/Ice Sensor 090
  • Included: One polyethylene protective cap, one polyethylene mounting plate, and eight #6-32 x 3/8" screws

The sensor contains two 10k Ohm thermistors: one for slab surface temperature and one for sensor heater temperature. The sensor also detects surface water. The heating element resistance between the red and black wires should be approximately 50 Ohms. The water detection resistance between blue and black wires should be 2,000,000 Ohms when dry, and between 10,000 and 300,000 Ohms when wet.

Usage Features

  • Automatic Snow/Ice Detection: The sensor continuously monitors slab conditions to automatically detect the presence of snow or ice.
  • Slab Temperature Sensing: Provides accurate temperature readings of the slab surface.
  • Long Wire Included: The 090 model comes with a 65' (20 m) cable, and the 094 model with a 208' (63 m) cable, reducing the need for in-field splicing.
  • Durable Design: Engineered for long life in driveway and walkway installations.
  • Mounting Solution: The Sensor Socket 091 provides a dedicated mounting solution, including a mounting plate, to simplify installation and ensure proper sensor placement.
  • Compatibility: Specifically designed for use with tekmar Snow Melting Controls. Operation with third-party control systems may lead to electrolysis failures not covered by the tekmar Limited Warranty.

Installation Considerations:

  • Sensor Location: The sensor should be placed in a location representative of average slab temperature and moisture conditions, avoiding areas affected by abnormal temperature conditions (e.g., near buildings, hot air exhaust, sunny spots) or areas with poor drainage where standing water could accumulate.
  • Traffic Areas: While placing the sensor in traffic areas can trigger melting due to passing traffic (desirable in commercial settings), it may be preferable to locate it away from traffic in residential installations to reduce fuel consumption.
  • Sloped Surfaces: On sloped driveways, the sensor must be installed near the lowest elevation to ensure proper detection of runoff water.
  • Conduit: The sensor cable should be run in its own conduit, separate from high voltage wiring. The conduit from the sensor to the junction box should be shorter than the supplied cable length. Additional 18 AWG, 5-conductor cable can be spliced at the junction box to extend the total length up to 500' (150m).
  • Drainage: Adequate drainage under the socket is crucial for the sensor's longevity. The mounting plate includes a drainage hole.
  • Concrete/Paver Installation: A plastic plug is provided to prevent concrete from filling the socket during pouring. For brick pavers, surrounding pavers should be mortared to the socket for good thermal conduction.

Maintenance Features

  • Regular Cleaning: The sensor is installed in a harsh environment and can accumulate dirt, salt, and grime, which can inhibit proper water detection. It should be checked and cleaned regularly.
  • Cleaning Procedure: Before cleaning, the control power must be shut off. Use a soft bristle brush and warm soapy water to clean the sensor surface. Avoid using a steel wire brush, as it can damage the sensor. Thoroughly dry the sensor surface with a paper towel before re-powering the control.
  • Salt and Brine Contamination: Exposure to de-icing agents (road salt, magnesium chloride, calcium chloride) can compromise water detection and permanently damage the sensor. It is recommended to locate the sensor away from areas exposed to these agents, such as tire track areas or near curbs where contaminated water may splash.

Tekmar 090 Specifications

General IconGeneral
BrandTekmar
Model090
CategoryAccessories
LanguageEnglish