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© 203 Watts Radiant
Symptom
Look for...
Corrective Action
Display powering
on and off.
Measure voltage at
wiring terminals R
and C.
The power supply transformer
may have limited VA capacity. A
transformer with a larger VA rating is
recommended.
Thermostat does
not heat.
Mode Off
Thermostat must be in Mode Heat in
order to provide heating.
Radiant Thermostat 519
Air/Floor, Digital, 24V, incl floor sensor 079
Literature
IOM-WR-Radiant_Thermostat-59, PG-WR-Radiant_Thermostat-59,
ES-WR-Radiant_Thermostat-59, IS-WR-Radiant_Thermostat-59
Control
Microprocessor control. This is not a safety (limit) control
Packaged weight
0.6 lb. (270 g)
Dimensions
3-/6” H x 3” W x 5/6” D (94 x 76 x 24 mm)
Enclosure
White PVC plastic, NEMA Type
Approvals
Meets Class B: ICES & FCC Part 5
Ambient conditions Indoor use only, 32 to 22°F (0 to 50°C), RH ≤90% non-
condensing
Power supply
0 to 30 V (ac/dc), 50/60 Hz, .8 VA standby,
56 VA max fully loaded, Class 2
Relay
30 V (ac/dc) 2 A, Class 2 circuits
Sensor
NTC thermistor, 0 kΩ @ 77°F (25°C ±0.2°C) ß=3892
– Included
Floor Sensor 079
Floor Sensor 079
, extra
Packaged weight
0. lb. (50 g)
Dimensions
3/6” OD x -/2” (5 mm OD x 38 mm)
Sensor Material
36 stainless steel, 0’ (3 m) 24 AWG, 300 volt PVC insulated Zipcord
Approvals
CSA C US
Operating range
-58 to 22°F (-50 to 05°C)
Sensor
NTC thermistor, 0 kΩ @ 77°F (25°C ±0.2°C) ß=3892
Frequently Asked Questions
Technical Data
WARNING:
This product contains chemicals
known to the State of California to cause cancer
and birth defects or other reproductive harm.
For more information: www.watts.com/prop65