Lux Products P621U Thermostat User Manual

P621U

SMART TEMP^®UNIVERSAL

5/1/1-DAY PROGRAMMABLE THERMOSTAT

(FOR BOTH CONVENTIONAL AND HEAT PUMP SYSTEMS)

INSTALLATION AND OPERATING INSTRUCTIONS

52161

IMPORTANT!

• Please read all of these instructions carefully before beginning

installation.

• Label every wire terminal designation on your existing thermostat wiring

before removing your old thermostat.

• Ignore the color of the wires since they may not comply with any

standard. Please connect wires using the terminal letter designations.

Thank you for your confidence in our product. To obtain the best results from

your investment, please read and follow the installation procedures carefully, and

one step at a time. This will save you time and minimize the chance of damaging

either the thermostat or possibly your heating and cooling system. These

instructions may contain information beyond that which may be required for your

particular installation.

CAUTIONS AND WARNINGS . . . . . . . . . . 2

SYSTEM COMPATIBILITY . . . . . . . . . . . . 3

FEATURES . . . . . . . . . . . . . . . . . . . . . . . 4

TOOLS YOU MAY NEED . . . . . . . . . . . . . . 4

MOUNTING LOCATION . . . . . . . . . . . . . . 5

REMOVE OLD THERMOSTAT . . . . . . . . . . 5

INSTALL THERMOSTAT BASE . . . . . . . . . 6

WIRING INFORMATION . . . . . . . . . . . . . . 6

WIRING DIAGRAMS . . . . . . . . . . . . . . . . 8

HARDWARE SETUP OPTIONS . . . . . . . . 17

COMPLETE THE INSTALL . . . . . . . . . . . 19

FRONT PANEL ITEMS . . . . . . . . . . . . . . 19

OPERATING INSTRUCTIONS . . . . . . . . . 21

TEMPERATURE PROGRAMS . . . . . . . . . 23

ADVANCED FEATURES . . . . . . . . . . . . . 24

BATTERY REPLACEMENT . . . . . . . . . . . 31

TECHNICAL ASSISTANCE . . . . . . . . . . . 31

LIMITED WARRANTY . . . . . . . . . . . . . . 32

MERCURY NOTICE . . . . . . . . . . . . . . . . 32

WARNING: Use Energizer^®or DURACELL^®Alkaline Batteries Only.

Energizer^®is a registered trademark of Eveready Battery Company, Inc.

DURACELL^®is a registered trademark of The Procter & Gamble Company

CAUTIONS AND WARNINGS:

• This thermostat requires batteries to operate and failure or sub-standard

performance of the batteries may impair or prevent the correct operation of

the thermostat. Use Duracell^®or Energizer^®alkaline batteries ONLY for all

LUXPRO thermostats requiring batteries. BE SURE TO CHANGE THE BATTERIES

AT LEAST ONCE A YEAR, or whenever you see the LO BATT indication on the

screen. Failure to follow these battery instructions could result in property

damage and/or personal injury.

• The electrical rating for this thermostat is 1.5 Amps per terminal, with a

maximum total load of 3.0A for all terminals combined.

• The thermostat contains parts that may wear out through use and are

susceptible to failure if over-loaded or used in a manner other than as

indicated in the documentation.

• Check unoccupied residences regularly to ensure that all systems are

operating properly.

• Check any heating/air-conditioning system including this product before

operation and at regular intervals.

• Electrical interference, static electricity, failure or substandard performance of

batteries, wiring defects in the installation and/or characteristics of the

connected HVAC devices may prevent the system from regulating heating and

cooling as anticipated.

• The thermostat is a sensitive device and dropping the product can cause

damage to critical components. If the product is dropped or shaken violently

during transport or installation then it should be replaced immediately.

• Persons with physical or mental limitations may not be able to promptly

respond to a malfunction of the heating/air-conditioning system.

• All residents should be made aware of the potential in any system for

malfunctions that could cause continuous heating or cooling and should be

familiar with the operation and location of the heating/cooling appliance on/off

switch.

• Read the instruction manual completely before installing the thermostat. You

should consult a qualified HVAC technician or an electrician if you do not fully

understand the installation instructions.

P621U

LCD Display Screen

Fan Mode

Switch

Set Slide

Switch

FAN

AUTO

SET

DAY

5 36

FAN

RUN

DAY/TIME

HEAT

TEMP PROG

AIR FILTER

FILTER

72 %L^EFT40

ET 74

TEMPERATURE

HEAT

SETBACK

HOLD

OFF

EMER

COOL

System Mode

Switch

UP / DOWN Buttons

SYSTEM COMPATIBILITY:

The electrical rating for this thermostat is 1.5 Amps per terminal, with a

maximum total combined load of 3.0A for all terminals combined.

COMPATIBLE WITH:

• Most 24-volt heating and cooling systems

• 1 or 2 stage Heat / 1 stage Cool: Gas, Oil or Electric systems

• 1 or 2 stage Heat / 1 stage Cool: Heat Pump systems

• 3-wire hydronic (hot water) zone valves

• Gas Millivolt heaters

NOT COMPATIBLE WITH:

• 120/240 VAC line-voltage systems (without a transformer), ask your LUXPRO

dealer for thermostats to control these systems.

FEATURES:

• 1 or 2-Heat / 1-Cool, 5/1/1-day programming

• Universal Compatibility for all system types

• Weekdays, Saturday, and Sunday can be programmed separately

• Exclusive LUX^®Speed Slide^TMfor easy programming

• User-selectable periods per day (2 or 4)

• User-selectable programmable or non-programmable operation

• LuxLight^®EL (Electro-Luminescent) lighted display

• Programmable air filter life timer

• Graphical filter monitor

• Keypad lockout for unauthorized users

• Manual temperature hold

• Adjustable vacation hold (1 to 30 days)

• Temporary temperature override

• Adjustable temperature differential / cycle-rate

• Adjustable 2nd heat stage Offset setting

• User temperature calibration

• Adjustable heat/cool set temperature limit stops

• Smart recovery

• Dual-powered (battery and/or 24-volt system powered)

• Battery-free memory storage

• F/C temperature display

• 12/24-hour clock display

• 5/2-minute selectable time delay for equipment protection

TOOLS YOU MAY NEED:

• Screwdrivers

• Wire Stripper

• Wire Cutter

• Drill with assorted drill bits (new installations only)

MOUNTING LOCATION:

On replacement installations, mount the new thermostat in place of the old one

unless the conditions listed below suggest otherwise. On new installations,

please follow these general guidelines:

1. Mount the thermostat on an inside wall, about 5 ft. (1.5m) above the floor.

2. Do not locate the thermostat where air circulation is poor such as in a corner,

alcove, or behind a door that is normally left open.

3. Do not locate the thermostat where unusual heating or cooling conditions may

be present, such as: direct sunlight, above a lamp, television, or radiator, or on

a wall next to an exterior door or window.

4. Do not locate in a damp environment, as this can lead to corrosion that may

shorten thermostat life.

5. If painting or construction work is still ongoing, cover the thermostat

completely or wait until this work is complete before installation.

WARNING:

All wiring must conform to the local codes and ordinances that are in your

particular location.

REMOVE OLD THERMOSTAT:

1. Turn OFF the electricity to all heating and cooling

components. Do not turn the electricity back on until

all work is completed.

2. Remove the front portion of your old thermostat to

expose the wiring connections.

3. Write down the letters printed near each wire terminal

that is used, and also the color of each wire that is

connected to it. Self-adhesive wire labels are also

enclosed.

4. Carefully remove the wires one at a time, and bend them in a manner so that

they do not fall back inside the wall. Do not allow bare wire ends to touch

each other.

5. Loosen the mounting screws for the old thermostat and carefully remove it

from the wall.

INSTALL THERMOSTAT BASE:

THERMOSTAT TOP VIEW

1. Strip wire insulation leaving only 3/8 in. (9.5mm) bare wire ends, and clean off

any corrosion present.

2. Fill the wall opening with non-combustible insulation to prevent drafts from

affecting the thermostat’s normal operation.

3. Separate new thermostat housing using your thumb and index finger. Provide

pressure in opposite directions to the release tabs on the top of the housing,

in the directions shown in the diagram shown above.

4. Route the wires through the opening in the new thermostat base plate, and

hold the base against the wall. Try to line up the screw holes from the prior

thermostat, and install the mounting screws.

5. If the previous holes cannot be used, hold the thermostat base against the

wall so that it appears straight and level (position the base for best

appearance) and mark for the new screw holes. Attach the base to the wall

using the screws provided (use the supplied plastic anchors if needed when

mounting to a soft material such as drywall).

WIRING INFORMATION:

CONNECTING THE WIRES:

When attaching the wires to the thermostat, please ensure that the bare wire

ends are held ALL the way into the terminal block while the screw is being

tightened.

WIRING DIAGRAM NOTES:

(Important, please read all notes before connecting wires)

• If the information provided in the following wiring diagrams does not clearly

represent or match your system, please refer to the “TECHNICAL ASSISTANCE”

section of this manual, and contact us before removing any of your existing

thermostat wiring.

• All of the dashed wires shown in the wiring diagrams are either optional, or

their usage depends upon your specific system type or brand. For example:

Diagram #1 shows the fan wire as optional. If your system does not have a

fan, than this terminal will not be used.

• Terminal letters shown in black represent typical wiring applications.

Depending upon the brand of your specific system or thermostat, your terminal

letters may not match exactly. Terminal letters shown in gray represent other

possible wiring designations that you might see on your existing thermostat

terminals.

• The optional “C” terminal is used for powering the thermostat by the 24-volt

system, using the System Common wire. This can be used alone, or in

addition to installing batteries as a backup. NOTE: connecting the System

Common wire to the thermostat is not necessary for heating and cooling to

function properly.

• If your old thermostat has both a “Y” and “C” wire both present, then “C” is

most likely a System Common wire.

• For Heat Pump systems, you will use either the “O” terminal or the “B”

terminal on this thermostat, but not both. If your old thermostat has both an

“O” and a “B” wire present, then “B” is likely a System Common wire and may

be connected to the “C” terminal. Connecting a System Common wire to this

thermostat’s “B” terminal may damage the thermostat, and also your heating

and cooling system.

• Some Heat Pump systems have a wire for AUX electric heat (usually W2), and

also a separate wire for Emergency electric heat (usually E). This thermostat

uses the W2 terminal for both AUX and Emergency Heat. Tape off your “E”

wire, and confirm that all components function without it.

• If replacing an old thermostat that has a mechanical clock, there may be two

wires labeled as “C” for the clock power. Tape off these wires and do not

connect them to the “C” terminal of this thermostat.

WIRING DIAGRAMS:

DIAGRAM

SYSTEM TYPE / DESCRIPTION

PAGE #

CONVENTIONAL:

HEAT PUMP:

HEATING ............................................................9

1-STAGE OR 2-STAGE

2, 3, 4, 5 WIRES

HEATING ..........................................................10

3-WIRE ZONE VALVE

3, 4 WIRES

COOLING ..........................................................11

1-STAGE

3, 4 WIRES

HEATING AND COOLING .....................................12

1-STAGE HEAT

4, 5 WIRES

HEATING AND COOLING .....................................13

2-STAGE HEAT

5, 6 WIRES

HEATING AND COOLING .....................................14

TWO-TRANSFORMERS

5, 6 WIRES

HEATING AND COOLING .....................................15

SINGLE-STAGE ONLY

4, 5 WIRES

HEAT PUMP:

HEATING AND COOLING .....................................16

WITH AUX / EMERGENCY HEAT

5, 6 WIRES

HARDWARE SETUP OPTIONS:

On the thermostat’s circuit board, there is a row of DIP switches, labeled #1

through #8. The position of these switches will change how the thermostat

operates, and also how information is conveyed to you on the LCD display

screen. If you make any changes to these options, the changes are not

recognized unless you either: change the position of the HEAT/OFF/COOL mode

switch, or press the “HW RST” (Hardware Reset) button on the circuit board. The

use of this button is further described in the “ADVANCED FEATURES” section of

this manual.

These option switches are very small and should be moved carefully using

objects such as: eyeglass screwdriver, fine-point pen, toothpick, or similar. The

listing below describes the available choices for each option switch:

SWITCH #1 (SYSTEM): [OFF/DOWN = FURN, default] This setting is used for the

majority of all heating systems that are not heat pumps. Examples for this

setting would be: natural gas furnace, hot water baseboard heat, and oil heat.

[ON/UP = HP] Use this setting if you have a heat pump unit (which looks just like

an outside air conditioning unit, but is used for both cooing and heating).

SWITCH #2 (TYPE): [OFF/DOWN = PROG, default] The thermostat controls the

room temperature by following temperature program periods that you set up

based upon your daily routine. [ON/UP = MAN] The thermostat operates manually

just like a mechanical or non-programmable model. This method of operation is

very basic and only shows the room temperature and set temperature; there are

no temperature programs, days of the week, or clock times.

SWITCH #3 (PERIODS): [OFF/DOWN = 4, default] The thermostat uses four

temperature program periods in both heating and cooling (MORN, DAY, EVE, and

NITE). Each period has a separate start time and a set temperature. [ON/UP = 2]

The thermostat operates in the same manner as above, however there are only

two temperature program periods for heating and cooling (DAY and NITE). This

may be more convenient if you are typically home during the day, and only need

the set temperature to be different while you are sleeping.

SWITCH #4 (SCALE): [OFF/DOWN = F, default] All temperature values are

displayed using the Fahrenheit scale. [ON/UP = C] This setting displays all

temperature values using the Celsius scale.

SWITCH #5 (TIME): [OFF/DOWN = 12 HR, default] This setting displays the clock

times and temperature program period start time values on the screen using US

standard AM and PM values. [ON/UP = 24 HR] This setting displays the clock and

temperature program period start time values on the screen using the 24 HR

military-time format (17:30 hours, 22:00 hours, without using AM/PM).

SWITCH #6 (DELAY): [OFF/DOWN = 5 MIN, default] This sets the minimum length

of time that Heat or Cool must remain either On or Off, before it will

automatically switch to the alternate On or Off state. This internal delay prevents

rapid cycling of your system and provides equipment protection particularly for

cooling units. The 5-minute setting is fine for most applications. [ON/UP = 2

MIN] If you feel that your system may need to cycle more frequently than the

thermostat is allowing, then you may use the 2-minute setting.

SWITCH #7 (RECOVERY): [OFF/DOWN = DISABLE, default] The Early Recovery

feature affects how the thermostat transitions from an energy saving setback

(DAY and NITE) program period, to a comfort (MORN and EVE) program period

temperature, when it is following the daily temperature programs. When this is

disabled, the thermostat makes a set temperature change at the beginning of an

upcoming period's start time. [ON/UP = ENABLE] The Early Recovery feature will

calculate the capability of your system and turn on the heating or cooling early

so that the temperature in your home reaches the desired set point as close as

possible to the start of the period. During the time that the thermostat is

performing a recovery, the word “RECOV.” will be shown in the display screen.

SWITCH #8 (BATTERY MONITOR): [OFF/DOWN = ON, default] This setting,

regularly monitors the battery level, and shows “LOW BAT” on the screen if the

batteries need to be replaced. Use this setting at all times when batteries are

present in the thermostat. [ON/UP = OFF] This setting only applies if you are

NOT physically using batteries in the thermostat, and are powering the

thermostat entirely from the system (“C” wire terminal).

GAS / ELEC SLIDE SWITCH (FAN OPERATION):

This switch is a physical component by itself on the

circuit board, and is much larger than the DIP

switches listed above. [DOWN = GAS, default] This

setting lets the heating system control the blower

fan automatically by itself. Systems that would

typically use the “GAS” setting would be: natural

gas, propane, or oil furnaces. This setting has no

effect upon Cool mode operation. [UP = ELEC/HP]

This setting runs the system’s blower fan when

BATTERY

ELEC

GAS

heat is called for, and is required for heating systems that do not control their

own fan while the thermostat is in HEAT mode. Heat pump systems, and units

with an electric heating element typically require this setting.

COMPLETE THE INSTALL:

Once the hardware options are set, install two new Energizer^®or DURACELL^®

"AA" size alkaline batteries. Ensure that the batteries are installed in the proper

direction as per the markings shown in the battery tray. If the batteries were

already installed before changing the hardware setup options, change the

position of the HEAT/OFF/COOL System Mode switch to accept the new hardware

option switch settings.

FRONT PANEL ITEMS:

These items below are all located behind the door on the front of the thermostat.

To open the door, pull outwards using the small indentation in the center of the

top edge of the thermostat housing.

HEAT / OFF / COOL, SYSTEM MODE SWITCH: Set this switch to HEAT to control

your heating system, and COOL to control your cooling system. The OFF position

will disable both the heating and cooling units.

AUTO / ON, FAN MODE SWITCH: When this switch is in AUTO, the blower fan (if

present in your system) will automatically cycle on and off by itself while heating

or cooling is running. When in the ON position, the blower fan will run constantly

with or without a demand for heating or cooling, even when the System Mode

switch is in the OFF position.

NOTE: The Fan Mode switch only works if your system provides a wire for the

thermostat’s “G” wire terminal, to control a blower fan. The Fan Mode switch

has no effect in systems that do not have a blower fan (such as a hot water

radiator system).

MULTI-FUNCTION, SET SLIDE SWITCH: This switch provides an easy way to

quickly access the most commonly used thermostat settings. This switch has 4

individual positions, and unless a specific setting is being adjusted, this switch

should always remain in the RUN position for the thermostat to control the room

temperature. The other Set Slide switch positions are described in greater detail

in the ADVANCED FEATURES section. NOTE: this switch is only operable when the

thermostat is in “Programmable” mode. When the thermostat is used in

“Manual” control mode, all 4 of the switch positions will act like the RUN

position, except the “AIR FILTER” position.

SETBACK BUTTON: This button activates and deactivates the SETBACK feature,

which overrides the set temperature for an adjustable duration. This feature is

described in greater detail in the ADVANCED FEATURES section.

UP / DOWN BUTTONS: The UP and DOWN buttons are used to adjust any item

that can be changed by the user. Examples are the set temperatures, clock

times, and days of the week. In many cases, an item may be flashing if it can

currently be adjusted.

HOLD BUTTON: This button activates and deactivates the manual Temperature

Hold feature.

EMER BUTTON: When in Normal Run mode, the usage of this button varies

depending upon your specific system configuration. For heat pump systems,

pressing this button enables your emergency heat function, which is described in

greater detail in the OPERATING INSTRUCTIONS section. For conventional

systems, there is no such thing as emergency heat, so this button will have no

effect.

NEXT BUTTON: This button is mostly used while setting items such as software

options, and temperature program periods. When there are several items on the

screen that can be changed, usually one of them is flashing indicating that it can

be adjusted. Pressing the NEXT button will cycle through which item is flashing.

OPERATING INSTRUCTIONS:

SET DAY AND TIME: Place the Set Slide Switch into the DAY/TIME position. With

the day flashing, press UP or DOWN to set the day of the week. Press NEXT and

the clock time will start flashing. Use UP or DOWN to set the time, making sure

the AM/PM indication is correct. Holding the UP or DOWN buttons will make the

clock digits scroll rapidly. Return the Set Slide switch to the RUN position when

finished.

HEATING AND COOLING: Basic operation of your heating or cooling system can

be obtained with the Set Slide Switch in the RUN position and choosing either

HEAT or COOL on the System Mode switch. The temperature can be adjusted

using the UP and DOWN buttons. When the thermostat is first powered up, it will

follow a default temperature routine that is preset from the factory (shown

below).

PERIOD

HEAT MODE

COOL MODE

MORN 6:00 AM 70 °F (21 °C) 6:00 AM 78 °F (26 °C)

DAY

EVE

8:00 AM 62 °F (17 °C) 8:00 AM 82 °F (28 °C)

6:00 PM 70 °F (21 °C) 6:00 PM 78 °F (26 °C)

NITE 10:00 PM 62 °F (17 °C) 10:00 PM 75 °F (24 °C)

EMERGENCY HEAT: (Heat Pump Configuration Only). While in normal Heat mode

with the Set Slide switch in the RUN position, one single press of the EMER

button will activate Emergency Heat mode. A single press again will end

Emergency Heat mode, and return back to normal Heat mode. While in

Emergency Heat mode, the word “EMER” will also be shown in the middle portion

of the display screen. If a power loss occurs while in Emergency Heat mode, the

thermostat will continue to remain in Emergency Heat mode even after the power

comes back on.

Emergency Heat mode will prevent the first stage of your heat pump system from

turning on, and use only the “W2” heat terminal (Auxiliary Heat) as the primary

heating source. This will not only prevent the heat pump from wasting energy if

outdoor temperatures are too low to support efficient operation, but it could also

prevent damage to the heat pump if outside temperatures are below the

manufacturer’s recommendations. As every heat pump has different operating

characteristics, you should refer to your heat pump literature to determine when

to disable the heat pump and run in Emergency Heat mode.

LCD DISPLAY BACKLIGHT: The display screen is lighted to assist viewing at

nighttime, or in locations with low light levels. A press of any button on the front

panel will light the display for approximately 10 seconds. Any button presses

that occur while the light is on will reset the 10-second timer, causing the screen

to remain illuminated for an additional 10 seconds.

TEMPERATURE OVERRIDE: While in Program RUN mode, the set temperature can

be temporarily changed by pressing UP or DOWN. The set temperature will return

to the programmed value stored in memory when the start time of the next

upcoming program period is reached (Morn, Day, Eve, Nite). While a Temporary

Override is in effect, the word “OVERRIDE” will be shown in the display screen.

An Override may be cancelled moving the mode switch to OFF, then back to HEAT

or COOL.

MINIMUM RUN TIME: The thermostat has a default internal time delay of 5

minutes between load-on and load-off activations to prevent heating or cooling

system damage, which can occur from very frequent cycling. If heating or

cooling does not turn on right away with a manual change in set temperature,

please wait at least 5 minutes and the system should resume normal operation.

TEMPERATURE HOLD: A Temperature Hold is used for maintaining a fixed set

temperature. Once a Hold is initiated, the thermostat will maintain the set

temperature indefinitely. A Hold may be used for days, weeks, or even months at

a time, as long as the thermostat has adequate power. To enter Hold mode:

press the HOLD button one time and the word “HOLD” will appear in the display.

To cancel a Hold, press the HOLD button one more time. If a complete power

failure occurs during a Temperature Hold, the thermostat will continue to remain

in Hold mode even after the power comes back on. NOTE: If you plan to leave

the thermostat in Hold mode for an extended duration (unattended), it is

advisable to install new Energizer^®or DURACELL^®"AA" size alkaline batteries

prior to leaving to ensure reliable operation of your heating and cooling system.

STATIC NOTICE: This thermostat is protected against normal static electric

discharges, however to minimize the risk of damaging the unit in extremely dry

weather, please touch a grounded metal object before touching your thermostat.

TEMPERATURE PROGRAMS:

By default, this thermostat has 4 separate program periods for both Heat and

Cool mode, they are: MORN, DAY, EVE, and NITE. Each period ends at the start

time of the following period. The heat programs are set in HEAT mode, and the

cool programs are set in COOL mode.

NOTE: If the thermostat is configured to use only 2 periods per day instead of 4

(HARDWARE SETUP OPTIONS), the thermostat will only use the DAY and NITE

periods. The MORN and EVE periods will not be visible on the screen.

SET TEMPERATURE PROGRAMS: Move the Set Slide switch to the TEMP PROG

position. Programming will start with all 5 weekdays, Monday through Friday (all

grouped together). Use the UP/DOWN buttons to adjust the start time for the

MORN period, then press the NEXT button to advance. Use the UP/DOWN buttons

to adjust the set temperature for the MORN period, then press the NEXT button to

advance. Now adjust the start time and set temperature for the DAY period,

pressing the NEXT button after each to advance. Continue with these same steps

to adjust the start times and set temperatures for the EVE and NITE program

periods.

When the NITE period is finished for the weekdays, the thermostat will advance

forward to the Saturday program, with the MORN period start time flashing.

Perform the same steps that you used for setting the weekday periods, pressing

the NEXT button to advance through each flashing value.

When the Saturday NITE period is finished, the thermostat will advance forward

to the Sunday program, with the MORN period start time flashing. Perform the

same steps that you used for setting the Saturday periods, pressing the NEXT

button to advance through each flashing value. Return the Set Slide switch to

the RUN position when you are finished.

ADVANCED FEATURES:

TEMPERATURE SWING AND OFFSET SETTING: A thermostat works by turning

your heating or cooling system on and off whenever the room temperature varies

from the desired set-point temperature. The amount of this variation is called

the swing. Generally your system should cycle on about 3 to 6 times per hour. A

smaller swing number makes the system cycle more frequently, so the room

temperature is more precise and constant. A larger swing number will make the

system remain on for a longer duration each time and decreases the number of

cycles per hour. There is only one Swing setting, and this determines the cut-in

and cut-out points for both the first and second stages (if present), in both Heat

mode and Cool mode.

NOTE: The Swing and Offset settings need to be performed in a timely manner, as

the thermostat will timeout and automatically exit these adjustment screens after

approximately 10 seconds without a button press.

TO CHANGE THE SWING SETTING: Ensure that the System Mode switch is in the

OFF position and the Set Slide switch is in the RUN position. Press and hold the

HOLD button for at least 5 seconds. The words “SET” and “SWING” will appear

on the screen, along with a single flashing digit. Use the UP/DOWN buttons to

change the number value between 1 and 9 (0.25F to 2.25F, in 0.25F degree

increments). Number 1 is the default setting. Press the NEXT button to accept

the swing setting and proceed to the OFFSET setting.

TO CHANGE THE OFFSET: After the Swing value has been accepted, the words

“SET” and “OFFSET” will be shown on the screen, along with a flashing digit.

This setting is shown as a number of degrees, and is similar in nature to the

Swing however this only effects the operation of the second (auxiliary) heating

stage, if present. The setting range for Offset is from 0 to 9 degrees. When set

to 0 degrees, the second heating stage is completely disabled while in regular

Heat mode (Emergency Heat mode will still function for heat pump

configurations). An Offset value from 1 to 9 degrees will determine the number

of degrees from the set point that will be required for the second heating stage

to turn on. This setting can be used to conserve energy in situations where the

second heating stage is more costly to operate when compared to the first stage.

Cut-In / Cut-Out

(1^stStage)

70˚F Set

Temperature

Swing

Setting=

#2 (+/- 0.5˚F)

Offset **

Setting=

4˚F degrees

(2^ndStage) **

Cut-In / Cut-Out

DEGREES (F)

** = Only applies if a second

heat stage is present

TEMPERATURE CALIBRATION: The internal temperature sensor in this thermostat

is accurately calibrated at the factory, and in most cases alterations to this

setting should not be needed. The Temperature Calibration feature allows you to

manually offset the measured temperature by as much as plus or minus 5°F

(3°C) degrees from its original value. This feature can be useful to match or

synchronize this thermostat to another one or more, if multiple thermostats are

used in the same home.

NOTE: The Temperature Calibration setting need to be performed in a timely

manner, as the thermostat will timeout and automatically exit the adjustment

screen after approximately 10 seconds without a button press.

TO CHANGE THE TEMPERATURE CALIBRATION: Ensure that the System Mode

switch is in the OFF position and the Set Slide switch is in the RUN position.

Press and hold both the UP and DOWN buttons together for at least 5 seconds.

The words “SET” and “CAL” will appear on the screen, along with a single

flashing temperature digit. Use the UP/DOWN buttons to change the number of

degrees of adjustment. 0° degrees is the default value, and means no correction

is being applied. Press the NEXT button to accept the setting.

SETBACK FEATURE: The setback feature is similar to both a Temperature

Override and a Temperature Hold, in that both are used to maintain a fixed set

temperature instead of following a programmed daily routine. A Setback can be

considered the same as a Temperature Override, which can last for a longer

duration that you can adjust from 1-12 hours, or 1-30 days. By default, when a

Setback is activated in Heat mode, the set temperature used will be 5F (3C)

degrees lower than the current set temp. For Cool mode, the set temperature

used will be 5F (3C) degrees higher than the current set temp.

TO START A SETBACK: Ensure that the System Mode switch is in either the Heat

or Cool position, and that the Set Slider is in the RUN position. Press and hold

the SETBACK button for at least 2 seconds. The screen will change and show the

words “HOURS LEFT” and “OVERRIDE”, along with two digits. Use the UP/DOWN

buttons to set the duration for how long you would like to maintain a fixed set

temperature (from 1 to 12 hours). If you would like to set the duration for longer

than 12 hours, keep pressing the UP button. The display will change from

“HOURS LEFT” to “DAYS LEFT”, with an available duration of 1 to 30 days. Once

your desired Setback duration is shown on the screen, you can either wait for the

screen to advance forward on its own, or press the NEXT button (behind the door)

one time to jump ahead rapidly. Now use the UP/DOWN buttons to select your

desired set temperature that will be used for the Setback duration. Just like the

previous step, you can either wait for the screen to advance on its own, or press

the NEXT button to advance and return to the Normal Run screen.

TO CANCEL A SETBACK: While in the Normal Run screen, press and hold the

SETBACK button for at least 2 seconds. The word “OVERRIDE” will disappear

from the screen and the Setback will be cancelled. Moving the System Mode

switch or Set Slide switch, will also cancel a Setback.

TEMPERATURE LIMIT STOPS: There are two independent set temperature limit

stops: a maximum heat set temperature, and a minimum cool set temperature.

These stops do not prevent a user from performing normal actions like

Temperature Override or Hold. The Heat Limit Stop prevents the set temperature

from being adjusted higher than the heat limit setting. The Cool Limit Stop

prevents the set temperature from being adjusted lower than the cool limit

setting. Each of these temperature stops is user adjustable in one-degree

increments, and these settings are protected by a selectable 2-digit code to

prevent unauthorized tampering. By default, this 2-digit code is “00”, and the

temperature stops can be used as-is with this code.

NOTE: The Temperature Limit Stop settings need to be performed in a timely

manner, as the thermostat will timeout and automatically exit the setting screens

after approximately 10 seconds without a button press.

TO SET THE HEAT LIMIT STOP: Place the System Mode switch in the OFF position,

and the Set Slide switch in the RUN position. Press and hold the UP button while

sliding the System Mode switch from OFF to HEAT. The words “TEMP STOP” and

“LOCK CODE” will appear on the screen, along with two digits. Use the UP/DOWN

buttons to select the proper code to access the heat limit setting. Press the

NEXT button to accept the setting. If the code you tried was not correct, the

thermostat will exit and return to the Normal Run screen with no changes made.

If the entered code is correct, the screen will add the word “SET” and display the

current heat set temperature limit. Use the UP/DOWN buttons to adjust the

maximum heat set temperature value. Press the NEXT button to accept the

setting and return to the Normal Run screen in heat mode.

TO SET THE COOL LIMIT STOP: Place the System Mode switch in the OFF position,

and the Set Slide switch in the RUN position. Press and hold the DOWN button

while sliding the System Mode switch from OFF to COOL. The words “TEMP

STOP” and “LOCK CODE” will appear on the screen, along with two digits. Use

the UP/DOWN buttons to select the proper code to access the cool limit setting.

Press the NEXT button to accept the setting. If the code you tried was not

correct, the thermostat will exit and return to the Normal Run screen with no

changes made. If the entered code is correct, the screen will add the word “SET”

and display the current cool set temperature limit. Use the UP/DOWN buttons to

adjust the minimum cool set temperature value. Press the NEXT button to accept

the setting and return to the Normal Run screen in cool mode.

TO CHANGE THE TEMPERATURE STOP LOCK CODE: Place the System Mode switch

in the OFF position, and the Set Slide switch in the RUN position. Press and hold

the NEXT button for at least 5 seconds. The words “TEMP STOP” and “LOCK

CODE” will appear on the screen, along with two digits. Use the UP/DOWN

buttons to enter the current code (“00” by default) and press the NEXT button

one time. The word “SET” will now be displayed. Use the UP/DOWN buttons to

choose a new 2-digit code between “00” and “99”. Press the NEXT button to

accept the setting. The screen will flash briefly to confirm the code change, and

return to the Normal Run screen in Off mode.

IF YOU FORGET YOUR TEMPERATURE STOP CODE: The code can be reset to the

factory default “00” by performing the following steps. Place the System Mode

switch in the OFF position, and the Set Slide switch in the RUN position. Press

and hold the NEXT and HOLD buttons together for at least 10 seconds. The

screen will start flashing, and display words “SET”, “TEMP STOP” and “LOCK

CODE”, along with the new code of “00”. After a couple seconds, the screen will

automatically return to the Normal Run screen in Off mode.

KEYPAD LOCKOUT: You can lock the front panel buttons to prevent unauthorized

tampering of your thermostat settings.

NOTE: These keypad lock instructions need to be performed in a timely manner.

The 4-button sequence which locks the thermostat must be entered within a 10-

second timeframe, or the keypad lockout sequence will have to be entered again

from the beginning.

TO LOCK THE KEYPAD: Start with the System Mode switch in either the HEAT or

COOL positions, and the Set Slide switch in the RUN position. Perform a single

press of each button, in the following sequence: NEXT, NEXT, NEXT, HOLD.

TO UNLOCK THE KEYPAD: Start with the System Mode switch in either the HEAT

or COOL positions, and the Set Slide switch in the RUN position. Perform a single

press of each button, in the following sequence: NEXT, NEXT, NEXT, HOLD. The

padlock should no longer be present, with the thermostat now unlocked. If the

padlock is still on the screen, please try to enter the 4-button sequence again.

GRAPHICAL AIR FILTER MONITOR: In most systems that use a blower fan and air

ducts, there is an air filter that is either replaceable or requires cleaning. The

filter is usually located in the air handler, where the blower fan is. This

thermostat feature assists you with keeping track of proper maintenance and/or

periodic replacement intervals for your system’s filter.

The Graphical Filter Monitor displays a visual bar graph in the center of the

screen, which shows the amount of air filter life remaining (in % percent), since

the last time the air filter timer has been reset. Each dot in the filter bar graph

equals 10 percent (example: 4 dots shown means 40 percent filter life

remaining). This feature is for information purposes only, and does not affect the

operation of your heating or cooling equipment, or the thermostat. When the

filter usage duration has completly expired, the vertical filter bar graph will be

empty, and the word “FILTER” will flash on the screen.

TO SET THE AIR FILTER DURATION: Move the Set Slide switch to the “AIR FILTER”

position. The words “SET DAYS” will be shown on the screen, along with the

word “FILTER” and 2-3 characters at the top right corner of the display. Press

either of the UP/DOWN buttons to select the desired filter duration (in days) from

the following choices: OFF, 30, 60, 90, 120, 180, or 365. If the filter duration

value is set to “OFF”, then the Air Filter Monitor will be completely disabled.

Return the Set Slide switch to the RUN position when you are finished.

TO RESET THE FILTER USAGE COUNTER: Move the Set Slide switch to the “AIR

FILTER” position. The three small digits at the bottom of the screen tell you the

quantity of filter days remaining. Pressing the NEXT button will toggle the

display between showing the days remaining as a number, or a graphical

precentage remaining using the vertical bar graph. Press both the UP and DOWN

buttons together at the same time, and the usage counter will return to the

beginning of the value that it originally started counting from. Refer to the

previous paragraph, should you wish to change the starting value for the filter

monitor. Return the Set Slide switch to the RUN position when you are finished.

HARDWARE RESET: The Hardware Reset button (labeled “HW

RST”) is a small round push button that is located towards the

right side if the circuit board, just below the battery holder.

Pressing this button will cause the LCD display screen to

become fully populated, the heating and cooling load relays to

cycle off, read the position of the Hardware Setup Option

switches, and will perform an internal system check of the thermostat

HW RST

components. If your thermostat appears to be acting in an erratic manner,

pressing the Hardware Reset button may remedy this behavior. The temperature

programs are not erased when a hardware reset is performed, however the clock

will have to be changed to match the current day and time.

SOFTWARE RESET: The Software Reset button (labeled “SW

RST”) is a small round push button that is located towards the

left side if the circuit board, just below the battery holder. A

Software Reset is used to erase all heating and cooling

SW RST

temperature programs, and any user-adjustable software

values such as: Swing, Offset, and Calibration, to their original

factory default values. To perform a Software Reset, press and hold the Software

Reset button for at least 5 seconds. The LCD display screen will become fully

populated, than return to normal. The thermostat will still retain the current day

and ttime even after a Software Reset has been performed.

COMPRESSOR PROTECTION BYPASS: This optional feature permits the installer

or service technician to temporarily disable the built in compressor protection

delays. This is most useful for diagnosing and testing the heating and cooling

systems after installation is complete, and should not be used during normal

operation. To activate this feature, press and hold both the NEXT and HOLD

buttons, while also perform a single press of the Hardware Reset button (the LCD

display screen will become fully populated). Continue to hold the NEXT and

HOLD buttons until the LCD display screen returns to normal. All compressor

protection delays (in all modes of operation) will be disabled for 5 minutes. After

the 5-minute duration has expired, the thermostat will return to normal operation

automatically.

BATTERY REPLACEMENT:

This thermostat is powered by two “AA” Alkaline batteries. The batteries should

be replaced AT LEAST once per year to ensure reliable operation (or sooner, if the

“LOW BATT” icon appears at the top of the display screen). The batteries are

located on the back of the thermostat, at the top of the circuit board. The front

portion of the thermostat can be removed from the back half by pulling straight

outwards on the top and bottom of the thermostat housing, at the large

indentations that are present in the center of the top and bottom edges.

When installing new batteries, we recommend using only brand new Energizer^®

or DURACELL^®, “AA” size alkaline batteries. Please observe the polarity

markings shown in the battery compartment to ensure proper installation. When

finished, line up the front of the thermostat to the base, and firmly press together

to securely latch the front and back halves together properly.

TECHNICAL ASSISTANCE:

If you have any problems installing or using this thermostat, please carefully and

thoroughly review the instruction manual. If you require assistance, please

contact our Technical Assistance department at 856-234-8803 during regular

business hours between 8:00AM and 4:30PM Eastern Standard Time, Monday

through Friday. You can also receive technical assistance online anytime day or

night at http://www.luxproproducts.com. Our website offers you troubleshooting

guides, answers to the most common technical questions, and also permits you

to email your questions to our technical support staff at your convenience.

LIMITED WARRANTY:

If this unit fails because of defects in materials or workmanship within three

years of the date of original purchase, LUX will, at its option, repair or replace it.

This warranty does not cover damage by accident, misuse, or failure to follow

installation instructions. Implied warranties are limited in duration to three years

from the date of original purchase. Some states do not allow limitations on how

long an implied warranty lasts, so the above limitation may not apply to you.

Please return malfunctioning or defective units to the location from which the

purchase was made, along with proof of purchase. Please refer to “TECHNICAL

ASSISTANCE” before returning thermostat. Purchaser assumes all risks and

liability for incidental and consequential damage resulting from installation and

use of this unit. Some states do not allow the exclusion of incidental or

consequential damages, so the above exclusion may not apply to you. This

warranty gives you specific legal rights and you may also have other rights,

which vary from state to state. Applicable in the U.S.A. and Canada only.

MERCURY WARNING AND RECYCLING NOTICE:

Mercury is considered to be a hazardous material. If this product is replacing a

thermostat that contains mercury in a sealed tube, contact your local waste

management authority for instructions regarding recycling and proper disposal.

It may be unlawful in your state to place it in the trash.