Tekmar 518 Installation And Operation Manual
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Tekmar 518 Installation And Operation Manual

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Installation & Operation Manual
Thermostat 518
Introduction
The Thermostat 518 accurately controls the room temperature for a hydronic
heating zone using Pulse Width Modulation (PWM) technology. Simple up and
down buttons and a display with large type make this thermostat easy to read and
use. The 518 automatically detects a single auxiliary sensor to measure either
outdoor, floor or remote room temperature. This easy to install thermostat is a
direct replacement for tekmar Thermostats 507 and 508.
© 2016 tekmar 518 _ D - 06/16
Zoning

Energy Saving Features

• Away Input
• Auto Heating Cycle

Additional Features

• Radiant Floor Heating
• Pulse Width Modulation
• Auxiliary Sensor Input
• Outdoor & Floor Temperature
Display
• Backlight
• Freeze Protection
518 _ D
06/16
Replaces: 03/13

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Summary of Contents for Tekmar 518

  • Page 1: Energy Saving Features

    The 518 automatically detects a single auxiliary sensor to measure either outdoor, floor or remote room temperature. This easy to install thermostat is a direct replacement for tekmar Thermostats 507 and 508.

  • Page 2: Table Of Contents

    Replacement Manuals are available at tekmarControls.com Do not attempt to service the thermostat. There are no user serviceable parts inside the thermostat. Attempting to do so voids warranty. © 2016 tekmar 518 _ D - 06/16 2 of 12...

  • Page 3: Installation

    • Locate the tab on the bottom of the thermostat. • Push the tab with either your thumb or with a screwdriver. • Lift the thermostat front away from the thermostat’s base. © 2016 tekmar 518 _ D - 06/16 3 of 12...

  • Page 4: Mounting The Thermostat

    • Fasten the thermostat base to the wall using the wood screws to the wall anchors. • Terminate wiring to the wiring strip. Do not over tighten wiring screws. Hand tighten only. • Push the thermostat front onto the thermostat base. © 2016 tekmar 518 _ D - 06/16 4 of 12...

  • Page 5: Thermostat Wiring

    No Power No Power No Power Rh W1 S1 Rh W1 S1 Rh W1 S1 Com Away Do not over tighten wiring screws. Hand tighten only. Transformer 115 V (ac) © 2016 tekmar 518 _ D - 06/16 5 of 12...

  • Page 6: Testing The Thermostat Wiring

    DC power supplies the voltage should measure between 10 to 30 V (dc). 3. If the voltage on the R and C wire terminations is continuous and the thermostat display is not on, the thermostat may have a fault. Contact your tekmar sales representative for assistance.

  • Page 7: User Interface

    MODE OFF The floor has reached the The heating system is off. floor maximum temperature. AWAY WARNING SYMBOL Operating at the away Indicates an error is present. temperature. © 2016 tekmar 518 _ D - 06/16 7 of 12...

  • Page 8: Sequence Of Operation

    Rooms with large windows preventing Feels cool to the touch under heating in the evening. 40 to 45°F (5 to 7°C) Freeze protection for garages. Feels cold to the touch © 2016 tekmar 518 _ D - 06/16 8 of 12...

  • Page 9: Programmable Settings

    Default: 85°F (29.5°C) SET AWAY Set the away temperature. Range: OFF, 40 to 122°F (4.5 to 35.0°C) Default: 50°F (10.0°C) ESCAPE Release the buttons to return to the home screen. © 2016 tekmar 518 _ D - 06/16 9 of 12...

  • Page 10: Troubleshooting

    The built-in air temperature sensor has an open circuit fault. Do not confuse this error with the auxiliary room sensor short circuit error. This error cannot be field repaired. Contact your wholesaler or tekmar Room sales representative for details on repair procedures.

  • Page 11: Frequently Asked Questions

    30 V (ac/dc) 2 A, Class 2 circuits Sensor NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C) ß=3892 – Included None – Optional tekmar type # 070, 072, 073, 076, 077, 079, 084 © 2016 tekmar 518 _ D - 06/16 11 of 12...

  • Page 12: Limited Warranty And Product Return Procedure

    (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;...

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