Lux Products Thermostat P621Uc User Manual

P621Uc

SMART TEMP^®UNIVERSAL 5/1/1-DAY

PROGRAMMABLE OR NON-PROGRAMMABLE THERMOSTAT

(FOR BOTH CONVENTIONAL AND HEAT PUMP SYSTEMS)

INSTALLATION AND OPERATING INSTRUCTIONS

52176

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 . . . . . . . . . . . . . . 7

WIRING DIAGRAMS . . . . . . . . . . . . . . . . 9

COMPLETE THE INSTALL . . . . . . . . . . . 18

FRONT PANEL ITEMS . . . . . . . . . . . . . . 18

SYSTEM CONFIGURATION AND

SETUP OPTIONS. . . . . . . . . . . . . . . . . . 20

OPERATING INSTRUCTIONS . . . . . . . . . 23

TEMPERATURE PROGRAMS . . . . . . . . . 25

ADVANCED FEATURES . . . . . . . . . . . . . 26

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

TECHNICAL ASSISTANCE . . . . . . . . . . . 32

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

MERCURY NOTICE . . . . . . . . . . . . . . . . 33

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

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P621Uc

LCD Display Screen

Fan Mode

Switch

Set Slide

Switch

FAN

AUTO

SET

DAY

FAN

RUN

DAY/TIME

HEAT

TEMP PROG

AIR FILTER

FILTER

%LEFT

SET

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.

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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)

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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.

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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).

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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 BASE PLATE NOTICE:

This thermostat model is part of a family of similar models that have the same

general visual appearance. Even though this base plate may look the same as

base plates from other models, the wiring connections may have different

terminal letters for different purposes. Please do not interchange the back plates

and/or thermostat front halves of other similar looking models. Doing so may

cause undesired heating and/or cooling operation to occur.

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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.

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WIRING DIAGRAMS:

DIAGRAM

SYSTEM TYPE / DESCRIPTION

PAGE #

CONVENTIONAL:

HEAT PUMP:

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

1-STAGE OR 2-STAGE

2, 3, 4, 5 WIRES

HEATING ..........................................................11

3-WIRE ZONE VALVE

3, 4 WIRES

COOLING ..........................................................12

1-STAGE

3, 4 WIRES

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

1-STAGE HEAT

4, 5 WIRES

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

2-STAGE HEAT

5, 6 WIRES

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

TWO-TRANSFORMERS

5, 6 WIRES

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

SINGLE-STAGE ONLY

4, 5 WIRES

HEAT PUMP:

HEATING AND COOLING .....................................17

WITH AUX / EMERGENCY HEAT

5, 6 WIRES

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COMPLETE THE INSTALL:

INSTALL BATTERIES INTO THERMOSTAT: Install two brand new Energizer^®or

DURACELL^®“AA” size alkaline (only) batteries, into the thermostat’s battery

compartment. Ensure the batteries are installed in the proper direction.

GAS / ELEC CIRCUIT BOARD OPTION (“G” TERMINAL FAN OPERATION): This

setting is a plastic shorting cap called a jumper. This jumper must remain

installed, and set to either GAS or ELECTRIC for your system to work properly.

This setting changes how your system’s blower fan (if applicable) is controlled

while the thermostat is in HEAT or EMERG HEAT mode, when the Fan switch in

the AUTO position. This setting does not affect the fan operation while in COOL

mode.

When set to “GAS”, the blower fan is controlled solely by the heating system

itself. Systems that would typically use the “GAS” setting would be: natural gas,

propane, or oil furnaces, and boilers.

NOTE: If your blower fan does not operate

properly after installation, move the Gas /

Electric option to the “Electric” setting.

BATTERY

When set to “ELEC”, the blower fan is

controlled directly by the thermostat. This

setting is required for heating systems

that do not control their own fan, such as

HEAT PUMPS, and units that only have an

electric-resistive heating element as the

heat source.

ELEC

GAS

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

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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.

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SYSTEM CONFIGURATION AND SETUP OPTIONS:

Setup options for how the thermostat will function, along with choosing your

particular system type, are performed using a menu on the display screen.

TO ACCESS THE SETUP MENU: Move the System Mode switch into the OFF

position, and then hold down the EMER button for approximately 5 seconds until

the screen changes. The menu will always start with item #1, and is advanced to

each following item by a single press of the NEXT button. The options for each

item are changed using the UP or DOWN buttons.

ITEM #01 (CLK = CLOCK FORMAT): [12Hr, default] This displays the clock times

using standard AM and PM values. [24Hr] This displays the clock times using the

military-time format (example 22:00 hours, without using AM or PM).

ITEM #02 (TMP = TEMPERATURE SCALE): [F, default] Shows all temperature

values in Fahrenheit. [C] Shows all temperature values Celsius.

ITEM #03 (THERMOSTAT TYPE): [PROG, default] Use this setting for following a

daily program routine. [MAN] This setting omits the program routine and

operates as a manual style non-programmable thermostat. This is very basic and

only shows the room temperature and set temperature on the screen, with no

clock.

ITEM #04 (PERD = PERIOD QUANTITY): [4P, default] Thermostat uses four

periods per day (called MORN, DAY, EVE, and NITE). [2P] The thermostat uses two

periods per day (called DAY and NITE).

ITEM #05 (RCV = EARLY RECOVERY): [OFF, default] Program Set Temperature

values start to occur at exactly the period start times. [ON] Early Recovery

affects how the transition occurs when changing from the NITE to the MORN

period, and when changing from the DAY to the EVE period. The thermostat

calculates how long it takes for your home to recover from a setback on a daily

basis, and turns on ahead of time in order to reach the target set point of the

next upcoming program period by the period’s start time. While in a recovery,

the word “RECOV.” will be shown on the display screen.

ITEM #06 (SYSTEM MODE): [FURN, default] This is for the majority of heating

systems that are not Heat Pumps, such as a gas furnace or hot water boiler. [HP]

Use this setting if you have a Heat Pump system, which uses the outdoor unit as

the primary heat source and may also contain an electric heating element as a

backup heat source. When set to “HP”, ensure that you have also set the

Gas/Electric circuit board option to “ELEC”, as described in the “COMPLETE THE

INSTALL” section.

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ITEM #07 (DLAY = DELAY TIME): [5, default] Thermostat waits 5 minutes before

turning the system back on after it was last run. This internal delay prevents

rapid cycling and provides equipment protection. The 5 minute setting is fine for

most applications. [2] Same operation as above but reduced to 2 minutes

between state changes.

ITEM #08 (TEMPERATURE SWING): 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.

Use the UP/DOWN buttons to change the number value between 1 and 9.

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.

ITEM #09 (STAGE-2 OFFSET): [2, default] This setting is adjusted as a number

from 0 to 9. When set to 0 (ZERO), the second heating stage is completely

disabled while in regular Heat mode (however 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.

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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

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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

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

to disable the heat pump and run in Emergency Heat mode. In general for most

heat pump systems, use Emergency Heat mode whenever the outside

temperature is less than 32°F (0°C) degrees.

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.

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.

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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

(SYSTEM CONFIGURATION AND 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.

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ADVANCED FEATURES:

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

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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 “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.

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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 “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 “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”, “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.

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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.

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HARDWARE RESET: The Hardware Reset button (labeled “HW

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

middle of 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, and will perform an internal system check of the

HW RST

thermostat 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: A Software Reset is used to erase ALL heating and cooling

temperature programs, and to return all user-adjustable software settings back

to their original factory default values. To perform a Software Reset, first ensure

that the thermostat’s Keypad Lockout is not enabled and then move the System

Mode switch to the OFF position. Press and hold the UP, DOWN, and NEXT

buttons all together for at least 5 seconds. The LCD display screen will become

fully populated (let go of buttons at this point), and than return to normal. The

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

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.

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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

“LO BATT” appears in the display screen). The batteries are located on the back

of the thermostat’s circuit board. The front portion of the thermostat can be

removed from the back half by using the tabs on the top edge of the thermostat

housing.

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.

BATTERY GRAPHIC: Anytime that batteries are

physically present in the thermostat, there will be

a visual indication of the remaining battery life

available on the thermostat’s display screen.

When brand new batteries are installed in the

battery compartment, this graphic should indicate

full battery life remaining with all bars present.

Over time, as the battery life decreases to the

point of having only 1 bar left, the Temperature

and Clock digits will start to alternate between

showing their normal content, and the words “LO

BATT”. At this point the batteries will need to be

replaced as soon as practical to avoid uninterrupted operation of your heating

and/or cooling system. In most cases, the thermostat will be capable of

providing you approximately two months of normal operation once the point of 1

bar left has been reached, and the screen shows the words “LO BATT”.

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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.

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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.

DAY

FAN

HEAT

FILTER

%LEFT

SET

SETBACK

HOLD

Mt. Laurel, New Jersey 08054, USA

http://www.luxproproducts.com

856-234-8803

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