MrPEX Systems 5110519 Operation Manual
Radiant Thermostat 5110519
Installation & Operation Manual
519_D
04/17
Zoning
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The Radiant Thermostat 519 accurately
controls the room and/or floor 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. A Slab Sensor 5110079
is included to measure floor temperature
to protect the floor from overheating and
enhance comfort. This easy to install
thermostat is a direct replacement for
the tekmar Thermostat 509.
Introduction
Energy Saving Features
• Auto Heating Cycle
Additional Features
• Radiant Floor Heating
• Pulse Width Modulation
• Floor & Air Temperature Control
• Outdoor & Floor Temperature
Display
• Backlight
• Freeze Protection
• Includes Slab Sensor 5110079
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Congratulations on the purchase of your new MrPEX® 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
Preparation
Installation
Table of Contents
Getting Started ....................................2
Installation ....................................................2
Preparation .............................................2
Removing The Thermostat Base ....3
Mounting The Thermostat ................ 4
Slab Sensor 5110079 Installation ...5
Slab Sensor 5110079 Wiring ............. 6
Slab Sensor 5110079 Testing ........... 7
Temperature vs. Resistance Table ..... 7
Thermostat Wiring ...............................9
Testing the Thermostat Wiring ..... 10
User Interface.............................................11
Home Screen ........................................11
Symbols Description .......................... 11
Sequence of Operation ...........................12
Heating Operation .............................. 12
Programmable Settings ..........................13
Troubleshooting ........................................ 14
Error Messages ................................... 14
Frequently Asked Questions .......... 15
Technical Data ..................................... 15
Limited Warranty and Product
Return Procedure ............................... 16
Improper installation and operation of this control could result in damage to
the equipment and possibly even personal injury or death. It is your responsibility
to ensure that this control is safely installed according to all applicable codes and
standards. This electronic control is not intended for use as a primary limit control.
Other controls that are intended and certified as safety limits must be placed into
the control circuit.
Caution
• Jeweller screwdriver
• Phillips head screwdriver
• Wire Stripper
Tools Required
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Choose the placement of the thermostats early in the construction process to
enable proper wiring during rough-in.
Consider the following:
• Interior Wall.
• Keep dry. Avoid potential leakage onto the control.
• Relative Humidity less than 90%. Non-condensing environment.
• No exposure to extreme temperatures beyond 32-122°F (0-50°C).
• No draft, direct sun, or other cause for inaccurate temperature readings.
• Away from equipment, appliances, or other sources of electrical interference.
• Easy access for wiring, viewing, and adjusting the display screen.
• Approximately 5 feet (1.5 m) off the finished floor.
• The maximum length of wire is 500 feet (150 m).
• Strip wire to 3/8” (10 mm) for all terminal connections.
• Use standard 4 conductor, 18 AWG wire.
Installation Location
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Materials Required
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• 18 AWG LVT Solid Wire
(Low Voltage Connections)
Removing The Thermostat Base
To remove the thermostat base:
• 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.
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Mounting The Thermostat
Wall
Thermostat
Front
Thermostat
Base
If mounting directly to the wall:
• Drill holes and install the wall anchors.
• Feed the wiring through the large hole in the thermostat base.
• Fasten the thermostat base to the wall using the wood screws to the wall
anchors.
• Terminate wiring to the wiring strip.
• Push the thermostat front onto the thermostat base.
3 1/4”
(83 mm)
Stud
Gang
Box
Thermostat
Front
Thermostat
Base
Adapter Plate
5110012
If a single gang box is used:
• Adapter Plate 5110012 is required (sold separately).
• Feed the wiring through the hole in the adaptor plate and the thermostat
base.
• Fasten the adaptor plate to the gang box.
• Fasten the base of the thermostat to the adaptor plate.
• Terminate wiring to the wiring strip.
• Push the thermostat front onto the thermostat base.
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Thick Floor Coverings (greater than 3/8” (10 mm))
If a thick floor covering is to be installed directly to the subfloor, a groove 1/8” (4
mm) wide by 1/16” (2 mm) deep can be cut into the back of the flooring material to
accommodate the wire for the sensor. Ensure that the sensor is located in such a
position that the attached wire is able to reach to a suitable junction location.
Splices under the floor covering should be avoided
to ensure trouble free operation. A groove 3/16”
(5 mm) wide by 3/16” (5 mm) deep by 1-3/4” (45
mm) long should be cut to accommodate the
sensor. The sensor should be located mid way
between the heating elements to ensure a proper
temperature reading.
NOTE: If it is not practical to cut a groove in the
surface covering, follow the installation method
used for thin floor coverings.
Slab Sensor 5110079 Installation
Thin-Set or Thin-Pour Applications
If the floor covering is to be installed over either a thin-set or thin-pour material of
sufficient depth, the 5110079 slab sensor can be placed directly into either the
thin-set material or the thin-pour material
and covered over. Ensure that the sensor is
located in such a position that the attached
wire is able to reach to a suitable junction
location. Splices within the thin-set or thinpour should be avoided to ensure trouble free
operation. The sensor should be located mid
way between the heating elements to ensure
a proper temperature reading.
Tiles
Thin-set
Electric
Cables
Thin Floor Coverings (less than 3/8” (10 mm))
If a thin floor covering is to be installed directly to the subfloor, a groove 1/8” (4
mm) wide by 1/16” (2 mm) deep can be cut into the surface of the subfloor to
accommodate the wire for the sensor. Ensure that the sensor is located in such
a position that the attached wire is able to
reach to a suitable junction location. Splices
under the floor covering should be avoided to
ensure trouble free operation. A groove 3/16”
(5 mm) wide by 3/16” (5 mm) deep by 1-3/4”
(45 mm) long should be cut to accommodate
the sensor. The sensor should be located mid
way between the heating elements to ensure
a proper temperature reading.
Hardwood
Subfloor
Hardwood
Subfloor
New Installations
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