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© 203 Watts Radiant

Relay

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518

R

Rh W1 S1

Com

No Power

R C

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8
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C

519

R

Rh W1 S1

Com

No Power

L

N G

5 V (ac)

Floor 

Sensor 079

Relay

Transformer

Install field

jumper wire

R to Rh

24-Volt Master Zone Control Module

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1

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24V  0

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C

518

R

Rh W1 S1

Com

No Power

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519

Rh W1 S1

Com

No Power

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C

R

1

2

4

24 V (ac)

Power

Floor 

Sensor 079

24-Volt Master Zone Control 

Module for 4 Volt Actuators

Order: 8006626

24 V (ac)

Valve Actuator

Install field

jumper wire

R to Rh

Summary of Contents for Radiant 519

Page 1: ...ddown buttonsanda display with large type make this thermostat easy to read and use A Floor Sensor 079 is included to measure floor temperature to protect the floor from overheating and enhance comfort Introduction Energy Saving Features Auto Heating Cycle Additional Features Radiant Floor Heating Pulse Width Modulation Floor Air Temperature Control Outdoor Floor Temperature Display Backlight Free...

Page 2: ...oper installation and or maintenance Installation 3 Preparation 3 Removing The Thermostat Base 3 Mounting The Thermostat 4 Floor Sensor 079 Installation 5 Floor Sensor 079 Wiring 6 Floor Sensor 079 Testing 7 Temperature vs Resistance Table 7 Thermostat Wiring 8 Testing the Thermostat Wiring 10 User Interface 11 Home Screen 11 Symbols Description 11 Sequence of Operation 12 Heating Operation 12 Pro...

Page 3: ...ect 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 Loca...

Page 4: ...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 If a single gang box is used Adapter Plate 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 Term...

Page 5: ...cated in such a position that the attached wire is able to reach to a suitable junction location Splices within the thin set or thin pour 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 ...

Page 6: ...sor is located in such a position that the attached wire is able to reach to a suitable junction location Splices within the grout should be avoided to ensure trouble free operation Remove the appropriate grout line and place the sensor and wire in the floor Re grout the area Tiles Thin set Subfloor Retrofit Installations The Floor Sensor 079 is supplied with 10 3 m of cable If a longer length is ...

Page 7: ... a very high resistance there may be a broken wire a poor wiring connection or a defective sensor If the resistance is very low the wiring may be shorted there may be moisture in the sensor or the sensor may be defective To test for a defective sensor measure the resistance directly at the sensor location Once the test has been completed reconnect the S1 and Com wires to the thermostat Temperature...

Page 8: ... 538 170 77 1 403 Temperature Resistance F C 175 79 1 281 180 82 1 172 185 85 1 073 190 88 983 195 91 903 200 93 829 205 96 763 210 99 703 215 102 648 220 104 598 225 107 553 Temperature vs Resistance Table Continued Zone Valve C 518 R Rh W1 S1 Com No Power C 519 R Rh W1 S1 Com No Power Zone Valve 24 V ac Transformer L N RC Floor Sensor 079 Install field jumper wire R to Rh Thermostat Wiring ...

Page 9: ...e R to Rh 24 Volt Master Zone Control Module 1 1 2 3 4 5 6 2 4 1 2 4 1 2 4 24V 0 A B 1 2 4 A 1 2 4 A B 1 2 4 A B 1 2 4 A B 1 2 4 A B 1 2 1 2 B 1 2 1 2 1 2 1 2 C 518 R Rh W1 S1 Com No Power C 519 Rh W1 S1 Com No Power R C R 1 2 4 24 V ac Power Floor Sensor 079 24 Volt Master Zone Control Module for 14 Volt Actuators Order 81006626 24 V ac Valve Actuator Install field jumper wire R to Rh ...

Page 10: ... shuts off intermittently there may be a short circuit from the W1 wire to ground or the power supply is too small to power the load Testing the Heat Zone Output Wiring 1 Touch the button and set the heating temperature above the current room temperature Make sure the display does not flash Max if using a floor sensor 2 When the Heat On symbol appears on the display use an electrical meter to chec...

Page 11: ...ned on MODE OFF The heating system is off Warning Symbol Indicates an error is present MIN The floor is at or below the floor minimum temperature Max The floor has reached the floor maximum temperature User Interface Home Screen Symbols Description ...

Page 12: ...or sensor is connected the thermostat will maintain the desired air temperature as well as a minimum floor temperature This operation is recommended for areas with large windows that allow the sun to shine into a room and keep it warm without the need for heat This can allow the floors to cool off during the afternoon When the sun goes down it can take a long time for the floors to get warm again ...

Page 13: ...e button to view the software version ESCAPE Release the and buttons to return to the home screen Installer settings Press the and buttons together for 5 more seconds auxiliary sensor Select the type of auxiliary sensor Available when an auxiliary sensor is automatically detected Range NONE no auxiliary sensor ROOM Indoor Sensor FLOR Slab Sensor OUT Outdoor Sensor Default OFF Room SENSOR Select if...

Page 14: ...re sensor has a short circuit fault Do not confuse this error with the auxiliary room sensor short circuit error This error cannot be field repaired Contact your wholesaler or Watts Radiant sales representative for details on repair procedures AUXILIARY SENSOR OPEN CIRCUIT error The auxiliary sensor has an open circuit Check for loose or damaged wires Locate and repair the problem as described in ...

Page 15: ... 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 30V ac dc 2 A Class 2 circuits Sensor NTC thermistor 10 kΩ 77 F 25 C 0 2 C ß 3892 Included Floor Sensor 079 Floor Sensor 079 extra Package...

Page 16: ...the Products d Any freight or delivery costs related to the Product or any related electrical products Watts Radiant assumes no responsibility under this Limited Warranty for any damage to the Product caused by any trades people visitors on the job site or damage caused as a result of post installation work This Limited Warranty shall be invalidated by any abuse misuse misapplication or improper i...

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