LUX SMART TEMP TX500b Series - ELECTRONIC THERMOSTAT Manual

FEATURES

• The TX500 can be used with most 24 volt gas, oil or electric heating and air conditioning systems or gas millivolt heating systems. It cannot be used with 120 volt heating systems or heat pumps. Ask your dealer for other LUX thermostats to control those systems.
• The TX500 is programmable. There are four programming periods per day. Each period can be programmed separately.
• You can use the built-in time/ temperature programs, or alter them to suit your schedule. The TX500 provides separate programming for weekdays and weekends — for both heating and cooling. You can override the programmed temperatures for as little as one programming period or for an entire vacation.
• In cool weather, when the system switch is set to HEAT, the TX500 will maintain cooler "set back" room temperatures to save energy. It will then change to warmer "comfort" settings - all automatically, at specified times during the day.
• In warm weather, when the system switch is set to COOL, the TX500 will maintain warmer "set back" room temperatures to save energy. It will then change to cooler "comfort" settings - all automatically, at specified times during the day.
• A large liquid crystal display shows time, day of the week, and room and set temperatures.
• 5/2 Minute Selectable Minimum Run/Off Time for Short Cycle/Compressor Protection.
• Two Energizer^® or DURACELL^® "AA" alkaline batteries (not included) are used to retain your time and temperature programs.

INSTALLATION

To avoid electrical shock and to prevent damage to the furnace, air conditioner, and thermostat, disconnect the power supply before beginning work. This can be done at the fuse box, at the circuit breaker, or at the appliance.

Please read all instructions carefully before beginning installation.

TOOLS REQUIRED
#1 Phillips screwdriver (small) Drill with 3 ⁄ 16 -in. (4.8mm) bit

THERMOSTAT LOCATION
On replacement installations, mount the new thermostat in place of the old one unless the conditions listed below suggest otherwise.

On new installations, follow the guidelines listed below.

1. Locate the thermostat on an inside wall, about 5 ft. (1.5m) above the floor, and in a room thatis used often.
2. Do not install it where there are unusual heating conditions, such as: in direct sunlight; near alamp, radio, television, radiator, register, or fireplace; near hot water pipes in a wall; near a stove on the other side of a wall.
3. Do not locate in unusual cooling conditions, such as: on a wall separating an unheated room; or in a draft from a stairwell, door, or window.
4. Do not locate in a damp area. This can lead to corrosion that will shorten thermostat life.
5. Do not locate where air circulation is poor, such as: in a corner or an alcove; or behind anopen door.
6. Do not install the unit until all construction work and painting has been completed.
7. This thermostat does not require leveling.

REMOVING THE OLD THERMOSTAT

Read instructions carefully before removing any wiring from existing thermostat. Wires must be labeled before they are removed. When removing wires from their terminals, ignore the color of the wires since these may not comply with the standard.

Switch electricity to the furnace and air conditioner OFF; then proceed with the following steps.

• Remove cover from old thermostat. Most are snap-on types and simply pull off. Some have locking screws on the side. These must be loosened.
  
• Note the letters printed near the terminals. Attach labels (enclosed) to each wire for identification. Remove and label wires one at a time. Make sure the wires do not fall back inside the wall.
• Loosen all screws on the old thermostat and remove it from the wall.

MOUNTING THETX500 ON THE WALL

1. Strip insulation (9.5mm) from wire ends and clean off any corrosion.
   

INSTALLING BATTERIES/ MAINTENANCE

The TX500 requires two new Energizer^® or DURACELL^® "AA" size alkaline batteries to operate your furnace and retain its programming in memory. Replace the batteries when the LO BATT indicator appears in the display or at least once a year.

Use Energizer® or DURACELL® Alkaline Batteries Only.

1. Remove fresh batteries from their carton.
2. Remove body of thermostat as described at bottom of first column.
3. Remove the used batteries.
4. Install two new Energizer^® or DURACELL^® "AA" size alkaline batteries in the battery compartment. Observe the polarity marking shown in the compartment. Place body back on wall.
5. Place the body back on the wall. Hook the top of the body onto the base, swing the body down and snap the body onto the base.
   

Installation is now complete. Be sure to turn the power back on to your heating and/or air conditioning system. If this is the first time you are installing batteries, the thermostat will display "SUN 12:00 AM" Within 90 seconds the thermostat will begin to display the room temperature alternately with the time. To correct the display, see "Setting the TIME and DAY," after you set the programs.

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. Our web site offers you answers to the most common technical questions, and also permits you to email your questions to our technical support staff at your convenience.

OPERATION

The TX500 alternately displays the current time and the room temperature. It also displays the day of the week and the currently active control program that is controlling the temperature: MORN, DAY, EVE, or NIGHT.

The set point temperature will appear in the right side of the display. In the winter, set the system switch to HEAT to control your heating system. In the summer, set the switch to COOL to control your air conditioner. In spring and fall or when windows are open, you can set the system switch OFF.

Setting the FAN switch to AUTO automatically runs your system's fan during heating and cooling. Setting the FAN switch to ON runs your system's fan continuously even without heating or cooling.

THE BUILT-IN ENERGY STAR^® PROGRAMS

Push in the RESET key. This sets the built-in heating and cooling programs. To review the built-in programs, rotate the dial to SET WEEKDAY PROGRAM or SET WEEKEND PROGRAM.

You can use the built-in programs as shown, or change them as you wish. Each day is divided into four periods. Each period has its own starting time and temperature.

The dial must be in the RUN position to close the door.

PROGRAMMING THE TX500

You can change any of the preset times and/or temperatures to suit your schedules for the weekday and weekend programs. Each day is divided into four periods: Morning, Day, Evening, and Night. Each period is programmed for HEAT and for COOL.

A blank programming chart is provided below for you to record your temperature settings in that chart.

Select HEAT to program the TX500 for controlling your heater.

OR Select COOL to program the TX500 for controlling your air conditioner.

Rotate dial to SET WEEKDAY PROGRAM. To program the WEEKEND, rotate the dial to SET WEEKEND PROGRAM. With dial on SET WEEKDAY PROGRAM, you will see this display.

To change the start time for MORN.

To program temperature.

To change the temp. setting for MORN.

To move to DAY.

To change start time for DAY.

To program temperature.

To change the temp. setting for DAY.

To move to EVE.

To change the start time for EVE.

To program temperature.

To change the temp. setting for EVE.

To move to NIGHT.

To change the start time for NIGHT.

To program temperature.

To change the temp. setting for NIGHT.

Rotate dial to RUN position to start the programs.

SETTING THE TIME AND DAY

The TX500 is protected against normal static electric discharges. However, in extremely dry weather you should touch another metal object before the TX500 to avoid potential loss of programs.

Open the drop down door on the front of the thermostat. Rotate the dial to the SET DAY/TIME position. You should see the display pictured above with a flag pointing to a day of the week flashing. When you are finished setting the day and time, rotate the dial to RUN to return to normal operation or to another position to continue programming.

To change To set current time. The To change the current day.time (e.g."12:00 AM") current time.

will be flashing.

To change current day.

To set current time. The time (e.g."12:00 AM") will be flashing.

To change the current time.

TEMPERATURE OVERRIDE AND TEMPERATURE HOLD

These features let you change the current Set Temperature without changing the programs stored in your thermostat's memory.

TEMPORARY TEMPERATURE OVERRIDE

• Press UP/DOWN to change the current temperature setting. The OVERRIDE indicator appears on display.
• The Override feature will be automatically canceled at the start of the next program period.
• To cancel OVERRIDE prior to next program period press UP/DOWN until original set temperature appears. OVERRIDE indicator will disappear from display.
  

VACATION TEMPERATURE HOLD

• Press HOLD. Adjust temperature as desired with UP/DOWN.
• Temperature setting will not change even after next program period begins.
• To clear, press HOLD again.
  

ADVANCED FEATURES

TEMPERATURE SWING

A thermostat works by turning your heating or cooling system on and off whenever the room temperature varies a certain number of degrees from the set-point temperature. This variation is the "swing."

Your system should cycle on about 3 to 6 times per hour. A smaller swing number increases the number of cycles, so room temperature is more constant. A larger swing number decreases the number of cycles, to save energy in most cases.

SWING SETTINGS

Dial must be in the run position

Press together

To change swing

Press to set.

5 MIN/2 MIN MINIMUM ON/OFF TIME

Your thermostat has an internal timer built in to protect your compressor. The timer forces a minimum on/off time of 5 minutes. You may change this minimum on/off time to 2 minutes. To accomplish this, place the jumper labeled JP3 over both pins. You must press the small reset button on the face of the thermostat for the changes to take effect.

CHANGING FROM °F TO °C AND A 12HR CLOCK TO A 24HR CLOCK

• 
  Making these changes will require you to reset the thermostat. Copy any of your customized programs onto the chart below. This will be your reference to reenter the programs afterwards.
• Located at the top center of the thermostat are two jumpers - C/F and 12/24.
• To change to Celsius - remove jumper - C/F.
• To change to a 24HR clock - remove jumper- 24/12H.
• Press the reset key on the front of the thermostat for changes to take effect.
• Reprogram as necessary.
  

PROGRAMMING CHART