Tekmar 518 - User Manual

© 2016 tekmar 518
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D - 06/16
518
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D
06/16
Zoning Replaces: 03/13
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.
Introduction
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
Thermostat 518
Installation & Operation Manual

Summary

Important Safety Information

Installation

Preparation

Mounting The Thermostat

Thermostat Wiring

Switching Relay Wiring

Wiring diagram and instructions for using a switching relay with the thermostat.

Testing the Thermostat Wiring

Testing the Power

Procedure to verify power supply to the thermostat and identify potential issues.

Testing the Heat Zone Output Wiring

Steps to check voltage on output wires to confirm heating device operation.

Programmable Settings

User settings

Installer settings

Troubleshooting

Error Messages

Descriptions and meanings of error messages displayed by the thermostat.

Tekmar 518 Specifications

General

Category	Thermostat
Type	Programmable
Voltage	24 VAC
Display	LCD
Programming	7-day Programmable
Application	Residential
Temperature Range	40°F to 90°F
Power Source	Hardwired
Wiring	2-wire
Dimensions	4.5 x 3.5 x 1 inches (114 x 89 x 25 mm)