Installation Instructions

10
Specifications
Temperature Ranges
Heat: 40 °F to 90 °F (4.5 °C to 32.0 °C)
Cool: 50 °F to 99 °F (10.0 °C to 37.0 °C)
Operating Ambient Temperature
37 °F to 102 °F (2.8 °C to 38.9 °C)
Shipping Temperature
20 °F to 120 °F (28.9 °C to 48.9 °C)
Operating Relative Humidity
5% to 90% (non-condensing)
Physical Dimensions in inches (mm) (H x W x D)
41/16” H x 41/16” W x 15/32” D
103.5 mm H x 103.5 mm W x 29 mm D
Installer system test
To perform a System Test:
1 Press and hold CENTER and buttons for
approximately 3 seconds to enter advanced
menu.
2 Use to go to TEST. Press Select to enter
System Test.
3 Use to change between Heat, Cool, Fan,
Em. Heat (TH4210U only), or Ver (thermostat
version information). Press Select.
4 Press to turn heat, cool, or fan on. Press to
turn them off.
5 Use the Home button to exit the System Test.
System test System status
Heat
0
Heat Off
1
Heat On
2
Heat On (TH4210U only)
Cool
0
Cool Off
1
Cool On
Fan
0
Fan Off
1
Fan On
Em. Heat
(TH4210U only)
0
Em. Heat Off
1
Em. Heat On
Electrical Ratings
Terminal Voltage (50/60Hz) Running Current
W Heating 2030 Vac 0.021.0 A
W2 (Aux) Heating (TH4210U only) 2030 Vac 0.021.0 A
E Emergency Heat (TH4210U only) 2030 Vac 0.020.5 A
Y Compressor Stage 1 2030 Vac 0.021.0 A
G Fan 2030 Vac 0.020.5 A
O/B Changeover 2030 Vac 0.020.5 A
L/A Input 2030 Vac 0.020.5 A
NOTE: Not for use with 250, 500, or 750 MV systems.