Freeze Protection, Special Wiring Notes

9.W2 This terminal is active when the thermostat is calling for a second stage of furnace or electric heat. It will remain inactive unless two stages of heating have been specified in the installer setup menu.

10.E This terminal is active when the thermostat is calling for Emergency heat in a heat pump sys- tem. This terminal also powers freeze protection if it is desired. It will be active below 40°F(5°C) regardless of mode or battery condition or other unforeseen condition.

11.B This terminal is live at any time the unit is in Heat mode.

12.TC Future indoor temperature sensor common. May be wired to a maximum of three external indoor sensor units.

13.T Future indoor temperature sensor. May be wired to a maximum of three external indoor sen- sor units.

14.OT Future first of two terminals dedicated to the outdoor temperature sensor. Polarity of these leads does not matter.

15.OT Future second of two terminals dedicated to the outdoor temperature sensor. Polarity of these leads does not matter.

3.5.2 FREEZE PROTECTION

The PSP722E incorporates a mechanical thermal switch which may be used to prevent a freeze-up by calling for heat in the event the unit has accidentally been turned off or its batteries have not been replaced as recommended.

● This switch is available at the E terminal of the thermo- stat. In most systems using this feature will require wiring a jumper between the W1 and E terminals. The thermostat will call then for the first stage of heat, in fur- nace mode, or Aux heat in heat pump mode. See EMER-

GENCY HEAT.

● The nominal temperature set point of this switch is 40°F(5°C).

3.5.3 SPECIAL WIRING NOTES

● In heat pump mode, AUX heat is available at W1.

● In heat pump mode, Emergency Heat is activated from the E terminal. This terminal also provides freeze protec- tion and it will be active below a nominal temperature of 40°F(5°C).

3.5.4 COMMON WIRING OPTIONS

Though not shown here additional second stages may be used where applicable. Be sure to enable them properly in the Installer Setup menu.

W2 is second stage heat

E is emergency heat and freeze protection

Y2 is second stage cool or second stage heat pump

OPTIONAL O or B terminals may be used to power heat- ing dampers or changeover valves in any system config- uration.

OPTIONAL C terminal may be connected to a system

common to power the thermostat from the system in any wiring configuration.

WARNINGS: 1. A B wire is sometimes used as a

common wire. Connecting a common B wire to the B termi- nal in these systems will likely cause damage to the thermo- stat and/or HVAC system. Do not connect a wire to the B ter- minal if you are unsure whether it may be wired to a system common.

2.If Both Y and C wire are present, then C is common. Tape it off or connect it to the C terminal to allow the system to power the thermostat.

OPTIONALC, X, B, TC	C	Transformer Common
	B	B	Changeover Valve
	O	O	Use O or B not both

3.5.5SINGLE STAGE HEATING SYSTEM LABEL CROSS REFERENCE

	Previous Thermostat	New Thermostat
System	Terminal Marking	Terminals	Wire To
All 2 Wire Heat	RH, R, RC, V, 5	RH	Transformer
	W, H, 4	W1	Heating Valve
3 Wire	RH, R, RC, V, 5	RH	Transformer
	W, 4	W1	Heat Control
3 Wire	B, C	Tape Off *	*
3 Wire
(one wire is "F or G")	RH, R, 5, V	RH	Transformer
	W, 4	W1	Heating Valve
	G, F	G	Fan Relay

3.5.6SINGLE STAGE COOLING SYSTEM LABEL CROSS REFERENCE

	Previous Thermostat	New Thermostat
System	Terminal Marking	Terminals	Wire To
2 Wire	RC, R, V	RC	Transformer
	Y, Y1, C	Y1	Cooling Relay
3 Wire	RC, R, V	RC	Transformer
	Y, Y1, C	Y1	Cooling Relay
	G, F	G	Fan Relay

3.5.7SINGLE STAGE FURNACE HEATING AND SINGLE STAGE COOLING SYSTEM LABEL CROSS REFERENCE

	Previous Thermostat	New Thermostat
System	Terminal Marking	Terminals	Wire To
4 Wire
(heat & cool with
single transformer)	RH, RC, R, V	RH & RC, w jumper	Transformer
	W, W1	W1	Heating Relay
	Y, Y1, C	Y1	Cooling Relay
5 Wire	G,F	G	Fan Relay
5 Wire
(heat & cool with
two transformers)	RH	RH	Heating Transformer
	RC	RC	Cooling Transformer
	W, W1	W1	Heating Relay
	Y, Y1, C	Y1	Cooling Relay
	G,F	G	Fan Relay

3.5.8 TWO STAGE HEAT, SINGLE STAGE COOL, HEAT

PSP722E specifications

The Lux Products PSP722E is a cutting-edge programmable thermostat designed to provide homeowners with greater control over their heating and cooling systems. With a sleek design and user-friendly interface, this device offers a perfect blend of functionality and style, making it an attractive addition to any home.

One of the standout features of the PSP722E is its 7-day programmable scheduling capability. This allows users to set different temperature settings for each day of the week, accommodating varying schedules and ensuring that the home is at the perfect temperature when occupants are present. This feature not only enhances comfort but also promotes energy efficiency, as users can set lower temperatures during times when the house is unoccupied.

The thermostat is equipped with an easy-to-read LCD display that provides clear visibility of the current temperature settings and schedule. The intuitive interface allows homeowners to navigate through the various options with ease, making adjustments simple, even for those who may not be tech-savvy. Furthermore, the backlit screen ensures visibility, even in low-light conditions.

Energy savings are further maximized by the built-in energy-saving features. The Smart Recovery technology allows the thermostat to learn the amount of time it takes to reach a desired temperature, adjusting the heating or cooling schedule accordingly. This means that the system will start operating earlier if necessary, ensuring that the home reaches the desired temperature by the scheduled time, without wasted energy.

The Lux Products PSP722E is compatible with a wide range of HVAC systems, including gas, oil, electric, and heat pump units. This versatility makes it a suitable option for various home configurations, allowing it to easily replace most existing thermostats without the need for additional wiring or modifications.

Moreover, the thermostat features a user-friendly interface that includes one-touch buttons, making it easy to adjust the temperature settings on the fly. Users can also toggle between Fahrenheit and Celsius, catering to personal preferences.

In summary, the Lux Products PSP722E programmable thermostat combines advanced scheduling capabilities, energy-efficient technologies, and an intuitive design to enhance comfort and efficiency in any home. Its versatile compatibility with different HVAC systems makes it an ideal choice for homeowners looking to upgrade their heating and cooling controls while promoting energy savings.