Thermostat 518
Installation & Operation Manual
518
_
D
03/13
Zoning
Replaces: New
© 2013
518_D - 03/13
1 of 12
A Watts Water Technologies Company
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
Auto Heating Cycle•
Additional Features
Radiant Floor Heating
Pulse Width Modulation
Auxiliary Sensor Input
Outdoor & Floor Temperature
Display
Backlight
Freeze Protection
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