Tekmar 518 Thermostat-FEATURED

Tekmar 519 Radiant Thermostat Specification Sheet


Tekmar 519 Radiant Thermostat


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.


Tekmar 518 Thermostat Specification Sheet-FIG.1


Thermostat 518 One Stage Heat
Literature 518_C, 518_D, 518_Q, 518_U
Control Microprocessor control. This is not a safety (limit) control
Packaged weight 0.53 lb. (240 g)
Dimensions 3-11/16″ H x 3″ W x 15/16″ D (94 x 76 x 24 mm)
Enclosure White PVC plastic, NEMA type 1
Approvals Meets Class B: ICES & FCC Part 15
Ambient conditions Indoor use only, 32 to 122°F (0 to 50°C), RH ≤90% non-condensing
Power supply 10 to 30 V (ac/dc), 50/60 Hz, 1.8 VA standby, 56 VA max fully loaded, Class 2
Relay 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
Warranty Limited 3 Year (See 518_D for full warranty)

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

Scan code for quick link to product page on tekmarControls.com

Tekmar 518 Thermostat Specification Sheet-FIG.2

An auxiliary sensor must be used to measure any auxiliary sensor temperatures.

Sample Application Drawing

Below is a sample application drawing for this product. This application may include other tekmar products that are required for installation. More sample applications can be found at tekmarControls.com.

Sample Mechanical diagram


  • P1 = Manifold Pump
  • S1 = Optional Slab Sensor 079
  • T1 = 24 V (ac) Transformer 009
  • Z1 = Zone Valve

Tekmar 518 Thermostat Specification Sheet-FIG.3

Sample Electrical diagram

Tekmar 518 Thermostat Specification Sheet-FIG.4

All specifications are subject to change without notice

Tel: (250) 545-7749 • Fax: (250) 984-0815


Tekmar 519 Radiant Thermostat Specification Sheet

Other  Manual: Tekmar 519 Radiant Thermostat Quick Set-up Guide

Tekmar 519 Radiant Thermostat User Manual

Tekmar 519 Radiant Thermostat Installation and Operation Manual


Tekmar 519 Radiant Thermostat Specification Sheet





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