Troubleshooting – Issues
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.
Heat not on
Mode Off or Cool
Thermostat must be in Mode Heat in
order to provide heating.
Floor Max
The floor has reached the maximum
operating temperature.
Room is too hot due to
floor heating being on
Floor Min
Lower the Set Floor temperature
setting.
Cooling not on
Mode Off or Heat
Thermostat must be in Mode Cool in
order to provide cooling.
Technical Data
SetPoint 521 Programmable Thermostat
Two Heat or Heat-Cool (Includes Sensor 079)
Control
Microprocessor control. This is not a safety (limit) control
Packaged weight
0.6 lb. (290 g)
Dimensions
3
11
⁄
16
" H x 3” W x
15
⁄
16
" D (94 x 76 x 24 mm)
Enclosure
White PVC plastic, NEMA type 1
Approvals
Meets Class B: ICES & FCC Part 15, CE
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, Class 2
Relay
30 V (ac/dc) 2 A, Class 2 circuits
Sensor
NTC thermistor, 10 kΩ at 77°F (25°C ±0.2°C) ß=3892
– Included
Slab Sensor 079
Floor Sensor (A3040079)
10' (3 m) wire
Dimensions
3
⁄
16
" OD x 1
1
⁄
2
" (5 mm OD x 38 mm)
Enclosure
316 stainless steel, 10' (3 m) 24 AWG, 300 volt PVC-insulated zipcord
Approvals
CSA C US
Operating range
-58 to 221°F (-50 to 105°C)
Sensor
NTC thermistor, 10 kΩ at 77°F (25°C ±0.2°C) ß=3892
27
SetPoint 521 Programmable Thermostat Installation and Operation Manual
