© 2020 521_D - 12/20
2 of 28
A Watts Water Technologies Company
Congratulations on the purchase of your new tekmar
®
thermostat.
This manual will step through the complete installation, programming and sequence
of operation for this control. At the back, there are tips for control and system
troubleshooting.
Getting Started
Table of Contents
Getting Started ...............................2
Important Safety Information ...............3
Installation ...........................................4
Preparation .....................................4
Removing The Thermostat Base ....4
Mounting The Thermostat ...............5
Slab Sensor 079 Installation ...........6
Slab Sensor 079 Wiring .................7
Slab Sensor 079 Testing .................8
Temperature vs. Resistance Table ... 8
Thermostat Wiring .....................9-11
Testing the Thermostat Wiring ......12
Switch Settings ..................................13
User Interface ....................................14
Home Screen ................................14
Symbols Description .....................14
Programmable Settings .....................15
Fan Menu ......................................15
Set Temp Menu .............................16
Time Menu ....................................17
Schedule Menu ........................18-19
Setup Menu ............................. 20-21
Sequence of Operation ......................22
Mode Button Operation ................22
Heating Operation .........................22
Cooling Operation .........................23
Fan Operation ...............................23
Time Clock ....................................24
Programmable Schedule ..............24
Optimum Start ...............................25
Temperature Adjustment...............25
Access Levels ...............................25
Troubleshooting .................................26
Error Messages ............................26
Frequently Asked Questions .........27
Technical Data ..............................27
Limited Warranty and Product
Return Procedure .........................28
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