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Lux P621U - 5-1-1 Day Programmable/Manual, 2 Heat/1 Cool, Universal Thermostat

Item: P621U
MFR: P621U
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5-1-1 Day Programmable/Manual, 2 Heat/1 Cool, Universal Thermostat

For Use on:
Heating and cooling systems, including single and multi-stage heat pumps
2 stage heating and 1 stage cooling

Not For Use On:
Electric baseboard heat (120-240V)

2 AA Alkaline (included)

  • Universal compatibility for all system types except electric baseboard heat
  • A program for weekdays, Saturday & Sunday can be different
  • User selectable programmable or non-programmable operation
  • Exclusive Lux® Speed Slide™ for easy programming
  • User selectable periods per day (2 or 4)
  • Graphical filter monitor
  • Keyboard lockout for unauthorized users
  • Adjustable heat/cool temperature limits
  • Adjustable vacation hold (for 1-30 days)
  • Smart recovery - enables the set temperature to be reached by the programmed time
  • Temporary temperature override
  • Large lighted one touch display


NameLux P621U - 5-1-1 Day Programmable/Manual, 2 Heat/1 Cool, Universal Thermostat
Gemaire Item NumberP621U
Manufacturer Product NumberP621U
SKU - PIM Number1366804189462
ERP Number337988
Unit of MeasureEACH
Weight0.5 Pound (lb.)
Length1.5 Inches (in)
Width4.8 Inches (in)
Height5.5 Inches (in)
Hazardous MaterialNo
EPA Cert RequiredNo
Country of OriginCHN
Voltage24 VAC
Electrical ConnectionDNA
Electrical Rating1.5 Amps per terminal at 24Volts AC
Power MethodBattery or System Powered
Batteries IncludedYes
750mV CompatibleYes
Auto ChangeoverNo
Built In Wi-FiNo
Change/Check RemindersYes
Daylight Savings Time ReadyNo
Display OptionsNo
Displays Outdoor TemperatureNo
Heat Pump CompatibleYes
Indoor Remote SensorNo
Low Battery IndicatorYes
Programmable FanNo
Stages Cool1
Stages Heat2
Temperature Settings per Day4
Vacation ModeYes
Battery BackupYes
Accuracy+ or - 1 degree
IncludesInstallation Kit and Manual
Sensing ElementNo
Ambient Temperature Range45°F to 90°F (7.2°C to 32.2°C)
Application2 Heat 1 Cool
Differential Temperature+ or - 1 degree
Dual Transformer CompatibleNo
Fan SwitchingNo
Inside Depth1"
Inside Height3 1/4"
Inside Width5 1/4"
Number of HVAC Zones1
Operating Temperature Range14°F to 122°F (-10°C to 50°C)
Removable InterfaceNo
Switch ActionNo
System SwitchingNo
Temperature Range45°F to 90°F (7.2°C to 32.2°C)
Terminal DesignationsO, B, G, Y, RC, RH, W1, A, W2, C
Warranty Offered3 Year Limited
Energy Star RatedNo
Programming5/1/1 Day, Manual
GEM - Case Quantity