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Programmable Heat-Pump Thermostat
TAYSTAT 540
OWNER’S GUIDE
Pub. No. 22-5185-01
69-1229
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FEATURES HOLD KEY OVERRIDES PROGRAM INCREASE KEY: The Trane Co. sells comfort systems. OR HOLDS TEMPERATURE INDEFINITELY. INCREASE TEMPERATURE, Comfort is achieved through matching the LCD DISPLAY SET TIME, OR SCROLL correct equipment and controls. This THROUGH DAYS OF WEEK. thermostat is designed to provide the SELECT KEY: SET maximum comfort for your needs. CURRENT DAY AND Hold Select TIME, OR SET Some of the basic offerings are: PM PROGRAM DAY AND TIME. • Program up to four time periods
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Your thermostat displays the current day, time, period, temperature and system ( for heating or for cooling) in normal mode. In programming mode, only the setting or settings being programmed display. For example ÒSa SuÓ (Saturday Sunday) displays while programming the weekend schedule. All settings are explained below: CURRENT TEMPERATURE TEMPORARY DISPLAYS DISPLAYS. HEATING AND DURING TEMPORARY SET DISPLAYS COOLING SETPOINT DISPLAYS TEMPERATURE HOLD. WHILE SETTING DURING PROGRA
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PROGRAMMING YOUR SET PM THERMOSTAT M12591 CLOCK Note: While setting the current time, SET Setting the Current Day and Time displays. To set or reset the current day and time, follow these instructions. 2. To set Day of Week, press Select again. Press s or t to set current day. IMPORTANT Always press the keys with your SET fingertip or similar blunt tool. Sharp objects like pen and pencil points will damage the keyboard. M12593 Note: To exit the programming mode at 3. Press Hold to exit programmi
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Organizing Your Schedule Your thermostat can be set for four time periods (Wake, Leave, Return, and Sleep) for the weekday schedule (Monday through Friday), and four time periods for the weekend schedule (Saturday and Sunday). Without additional programming, your thermostat follows the same preprogrammed schedule for both weekdays and weekends (see Table 1). WAKE Choose the time you want your heating or cooling system to start to reach your comfort temperature after the SLEEP period. How? Cons
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RETURN Choose the time you want your heating or cooling system to start to reach your comfort temperature after the energy-savings LEAVE period. How? Consider the time required to reach your comfort level. Adjust the Return time to earlier when you know it will take the system longer to reach your comfort temperature. SLEEP Set the time you want your heating or cooling system to start to reach your sleep temperature. To use this period as an energy-savings mode, set the temperature lower dur
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The preprogrammed schedule is shown in Table 1. You may keep this schedule or organize your own. Schedules are adjustable as often as you wish. If you decide to keep this schedule, no further programming is necessary. Table 1. Preprogrammed Weekday and Weekend Schedule. Period Time Heat Setpoint Cool Setpoint Wake 6:00 AM 70 F (21 C) 78 F (26 C) Leave 8:00 AM 62 F (17 C) 85 F (29 C) Return 5:00 PM 70 F (21 C) 78 F (26 C) Sleep 10:00 PM 62 F (17 C) 75 F (24 C) To begin programming
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Customizing Your Weekday Schedule Use Table 2 to organize your weekday schedule. Fill in the times and temperatures you want to program. The names of the four periods are filled in for you. Table 2. Your Weekday Schedule. Heating Cooling Period Start Time Temperature Temperature Wake Leave Return Sleep Pub. No. 22-5185-01 69-1229 8
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Customizing Your Weekend Schedule Use Table 3 to organize your weekend schedule. Fill in the times and temperatures you want to program. The names of the four periods are filled in for you. Table 3. Your Weekend Schedule. Heating Cooling Period Start Time Temperature Temperature Wake Leave Return Sleep Note: Start Time is the time your thermostat begins to reach the desired temperature. Note: The thermostat cannot be set higher than 99°F (37°C) or lower
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Setting the Weekday Program IMPORTANT Hold Select Always press the keys with your PM fingertip or similar blunt tool. Sharp objects like pen and pencil points will damage the keyboard. 1. Slide the SYSTEM switch to the setting you want to program (Heat or Cool). SYSTEM FAN Cool Off Heat Em. Ht. Auto On Throughout programming, the thermo- M17336 SYSTEM SWITCH stat displays a flame (heating) or snowflake (cooling) to help you identify which mode you are program- NOTE: To exit the pr
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2. Set weekday Wake time and tempera- SET ture. a. Press Select four times. Press s or t to set Wake time. M17332 SET Note: When setting the Weekday Program, AM the days Mo Tu We Th Fr display. 3. Set weekday Leave time and tempera- M17331 ture. a. Press Select. Press s or t to Note: Schedule times are programmable in set Leave time. increments of 15 minutes. For each press, the time increases or decreases SET by 15 minutes. AM b. Press Select. Press s or t to set Wake temperature. M17333 Pub
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b. Press Select. Press s or t to b. Press Select. Press s or t to set Leave temperature. set Return temperature. SET SET M17314 M17312 5. Set weekday Sleep time and tempera- 4. Set weekday Return time and tempera- ture. ture. a. Press Select. Press s or t to a. Press Select. Press s or t to set Sleep time. set Return time. SET SET PM PM M17315 M12628 Pub. No. 22-5185-01 69-1229 12
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b. Press Select. Press s or t to Setting the Weekend Program set Sleep temperature. Note: For initial programming, you must set SET the weekday schedule as shown in Setting the Weekday Program before you can access weekend program- ming. If your weekday is already M17316 programmed, you can access weekend programming by pressing Select 12 IMPORTANT: times. Before pressing another key, continue with Setting the Weekend 1. Set weekend Wake time and tempera- Program. ture. a. Press Select. Press s
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b. Press Select. Press s or t to 2. Set weekend Leave time and tempera- set Wake temperature. Example ture. shows Cool setting. a. Press Select. Press s or t to set Leave time. SET SET AM M17318 Note: When setting the Weekend Program, M17319 the days Sa Su display. b. Press Select. Press s or t to set Leave temperature. SET M17320 Pub. No. 22-5185-01 69-1229 14
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3. Set weekend Return time and tempera- 4. Set weekend Sleep time and tempera- ture. ture. a. Press Select. Press s or t to a. Press Select. Press s or t to set Return time. set Sleep time. SET SET PM PM M17321 M17323 b. Press Select. Press s or t to b. Press Select. Press s or t to set Return temperature. set Sleep temperature. SET SET M17322 M17324 Pub. No. 22-5185-01 15 69-1229
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5. Press Select. End displays. Temporary Temperature Hold 1. Press s or t key twice to set a SET temporary temperature. TEMPORARY M17325 PM M17326 PM Note: The temporary temperature setting remains in effect until the next program period. To cancel, press M17300 Hold twice and wait five seconds. 6. Return to Step 1., Setting the Week- day Program to program the opposite mode, (heating) or (cooling). Your weekday and weekend schedules are now programmed. Pub. No. 22-5185-01 69-1229 16
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Indefinite Temperature Hold System and Fan The Hold key allows you to hold a tempera- Use the SYSTEM and FAN switches to change the settings. ture indefinitely. When Hold is active, Hld displays continuously. System Setting 1. Press Hold. To select the desired system setting, slide the SYSTEM switch in the lower right corner of 2. Press s or t key to set indefinite the thermostat. temperature setting. Hold Select PM M17327 3. To cancel, press Hold and wait five FAN SYSTEM seconds. Auto On Cool
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SYSTEM settings control the thermostat operation as follows: Cool: Normal setting for months when your home needs cooling (air condition- M17329 ing). Digital display shows a snowflake when cooling is on. NOTE: In the programming mode, the Off: Both heating and cooling are off. and indicate the system setting. Heat: Normal setting for months when your home needs heating. Digital display Fan Setting shows a flame when heating is on. To select the desired fan setting, slide the Em. Ht.: Swit
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Auto: Normal setting for most homes. points to Em Ht when the system is in Some systems may delay the fan emergency heat mode. The indicator may s turning on and off with the equip- also point to Aux Ht if the system calls for ment. additional back-up heating. On: The fan runs continuously. Use for INDICATOR improved air circulation and air quality. Em Ht FAN Aux Ht Auto On Set Room M10287 FAN SWITCH M10273 Auxiliary Heat The auxiliary heaters assist the heat pump under normal conditions
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Minimum Off-Timing CAUTION Your thermostat comes equipped with a Equipment Damage Hazard. minimum off-timer. At certain times during Can cause permanent damage to heating or cooling, the system will not start up the compressor or other equipment. again for at least five minutes after it turns off To avoid possible equipment damage, (compressor is off and canÕt be heard). This do not operate cooling when outside occurs when you change the SYSTEM switch temperature is below 50°F (10°C). position w
