TX500U SMART TEMP ® UNIVERSAL 5/2-DAY PROGRAMMABLE THERMOSTAT (FOR BOTH CONVENTIONAL AND HEAT PUMP SYSTEMS) I N S TA L L AT I O N A N D O P E R AT I N G I N S T R U C T I O N S 52105 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.
TX500U Fan Mode Switch LCD Display Screen FAN AUTO 5:36FANP TU ON DAY 72 F̊ HEAT HEAT 74 F̊ ROOM TEMPERATURE SET SET Set Slide Switch RUN DAY/TIME TEMP PROG AIR FILTER HOLD OFF EMER COOL NEXT System Mode Switch UP, DOWN and HOLD 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.
FEATURES: • • • • • • • • • • • • • • • • • • • • • 1 or 2-Heat / 1-Cool, 5/2-day programming Universal Compatibility for all system types Weekdays and Weekends can be programmed separately Exclusive LUX ® Speed Slide TM for 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 Keypad lockout for unauthorized users Manual temperature hold Temporary temperatur
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.
INSTALL THERMOSTAT BASE: Large Indentation: Front Housing Release Small Indentation: Door Release 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. Route the wires through the opening in the new thermostat base plate, and hold the base against the wall.
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.
WIRING DIAGRAMS: DIAGRAM SYSTEM TYPE / DESCRIPTION #1 CONVENTIONAL: HEATING .............................................8 1-STAGE OR 2-STAGE 2, 3, 4, 5 WIRES #2 CONVENTIONAL: HEATING .............................................9 3-WIRE ZONE VALVE 3, 4 WIRES #3 CONVENTIONAL: COOLING............................................10 1-STAGE 3, 4 WIRES #4 CONVENTIONAL: HEATING AND COOLING ...........................11 1-STAGE HEAT 4, 5 WIRES #5 CONVENTIONAL: HEATING AND COOLING .................
FAN WIRE MAY NOT BE PRESENT IN ALL SYSTEMS B G RH SYSTEM 24V TRANSFORMER HEATER STAGE 1 O P T I O N A L B* 4 V C X C W1 W2 W2 RH STAGE 2 A F W W1 R SYSTEM COMMON RC G Y Factory RH-RC Jumper Wire Installed 1-STAGE OR 2-STAGE, HEATING ONLY (INCLUDING MILLIVOLT) (2-WIRE HEAT USE “RH” & “W1”) NOTE: THE BLACK TERMINAL LETTERS ARE TYPICAL, GRAY TERMINAL LETTERS ARE BRAND SPECIFIC FAN O 2, 3, 4, 5 WIRES #1
B G CLOSE 3-WIRE ZONE VALVE OPEN OPEN = Heat On CLOSE = Heat Off B* 4 V C X C W1 A W2 RH A W W1 R RH SYSTEM COMMON RC SYSTEM 24V TRANSFORMER Y Factory RH-RC Jumper Wire Installed HOT WATER HEATING ONLY (WITH A 3-WIRE ZONE VALVE) NOTE: THE BLACK TERMINAL LETTERS ARE TYPICAL, GRAY TERMINAL LETTERS ARE BRAND SPECIFIC O 3, 4 WIRES O P T I O N A L #2
B Y1 F 6 Y Y G FAN G W1 SYSTEM COMMON RH SYSTEM 24V TRANSFORMER V RC R RC Factory RH-RC Jumper Wire Installed 1-STAGE, COOLING ONLY A AIR CONDITIONER W2 C O P T I O N A L B* X C NOTE: THE BLACK TERMINAL LETTERS ARE TYPICAL, GRAY TERMINAL LETTERS ARE BRAND SPECIFIC O 3, 4 WIRES #3
FAN G RC 6 SYSTEM 24V TRANSFORMER C O P T I O N A L B* C 4 W2 X HEATER A W1 W W1 SYSTEM COMMON V RH R Y1 RH F RC Y Y G AIR CONDITIONER B Factory RH-RC Jumper Wire Installed CONVENTIONAL (NON HEAT PUMP) 1-STAGE HEATING AND 1-STAGE COOLING NOTE: THE BLACK TERMINAL LETTERS ARE TYPICAL, GRAY TERMINAL LETTERS ARE BRAND SPECIFIC O 4, 5 WIRES #4
FAN G RC 6 SYSTEM 24V TRANSFORMER HEATER STAGE 2 C O P T I O N A L B* C 4 W2 W2 X STAGE 1 A W1 W W1 SYSTEM COMMON V RH R Y1 RH F RC Y Y G AIR CONDITIONER B Factory RH-RC Jumper Wire Installed CONVENTIONAL (NON HEAT PUMP) 2-STAGE HEATING AND 1-STAGE COOLING NOTE: THE BLACK TERMINAL LETTERS ARE TYPICAL, GRAY TERMINAL LETTERS ARE BRAND SPECIFIC O 5, 6 WIRES #5
G V 6 V R RH RH COOL 24V TRANSFORMER C B* C 4 HEATER W2 X A W1 W W1 HEAT 24V TRANSFORMER SYSTEM COMMON R Y1 F RC RC Y Y G AIR CONDITIONER B Factory RH-RC Jumper Wire REMOVED 1-STAGE HEATING AND 1-STAGE COOLING WITH TWO SEPARATE 24V TRANSFORMERS NOTE: THE BLACK TERMINAL LETTERS ARE TYPICAL, GRAY TERMINAL LETTERS ARE BRAND SPECIFIC FAN O 5, 6 WIRES O P T I O N A L #6
O B Y1 F 6 Y Y G FAN G W1 A HEAT PUMP W2 C CUSTOMER INSTALLED Y-W1 Jumper Wire SYSTEM COMMON RH SYSTEM 24V TRANSFORMER V RC R RC Factory RH-RC Jumper Wire Installed SINGLE-STAGE HEAT PUMP SYSTEM WITH NO AUX OR EMERGENCY HEAT O P T I O N A L B* X C NOTE: THE BLACK TERMINAL LETTERS ARE TYPICAL, GRAY TERMINAL LETTERS ARE BRAND SPECIFIC REVERSING VALVE O ** Use “O” or “B” Terminals, Never Both 4, 5 WIRES #7
O B FAN G Y1 F RH HEAT PUMP W1 A AUX / EMERG.
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.
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).
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).
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.
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.
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.
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.
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.
71 70 69 68 Cut-In / Cut-Out (1st Stage) 70˚F Set Temperature Swing Setting= #2 (+/- 0.
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.
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.
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.
TO RESET THE FILTER USAGE COUNTER: Move the Set Slide switch to the “AIR FILTER” position. The three small digits at the top of the screen tell you the quantity of filter days remaining. Press both the UP and DOWN buttons together, 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.
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).
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.luxproducts.com.
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.
5:36FANP TU DAY 72 F̊ HEAT 74 F̊ ROOM SET HOLD Mt. Laurel, New Jersey 08054, USA http://www.luxproducts.