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Programmable Thermostat
ASYSTAT 340
OWNER’S GUIDE
Pub. No. 12-5026-01
69-1609
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FEATURES HOLD KEY OVERRIDES PROGRAM OR HOLDS TEMPERATURE INDEFINITELY. INCREASE KEY: American Standard sells comfort systems. INCREASE LCD DISPLAY Comfort is achieved through matching the SETPOINT, OR ADVANCE correct equipment and controls. This TO NEXT STEP. thermostat is designed to provide the SELECT KEY: maximum comfort for your needs. Hold Select TO SET TIME Some of the basic offerings are: AND DAY. TUE DECREASE KEY: Program up to four time periods and DECREASE temperature settings to
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Your thermostat displays the SET DISPLAYS WHILE CURRENT TEMPERATURE DISPLAYS. SETTING THE CLOCK. HEATING OR COOLING SETPOINT current day, time, period, DISPLAYS DURING PROGRAMMING. temperature and system ( for CURRENT TIME DISPLAYS TEMPORARY DISPLAYS heating and for cooling) in IN NORMAL MODE. DURING TEMPORARY normal mode. In programming PERIOD START TIME DISPLAYS TEMPERATURE HOLD. IN PROGRAMMING MODE. mode, only the setting or settings being programmed CURRENT DAY DISPLAYS IN SET T
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SET PROGRAMMING YOUR PM THERMOSTAT M12591A 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 ▲ or ▼ 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. Note: To exit and save the time and day M18565 setting at any time, press H
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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 your weekday an
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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. 12-5026-01 8 69-1609
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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 Always press the keys with your Hold Select 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). FAN SYSTEM Auto On Cool Off Heat Throughout programming, the thermo- M20540 stat displays a flame (heating) or snowflake (cooling) to help you Note: To exit the programming mode at any identify which mode you are program- tim
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2. Set weekday Wake time and tempera- SET ture. a. Press Select four times. Press ▲ or ▼ to set Wake time. SET M18564 Note: When setting the Weekday Program, the days MON TUE WED THU FRI display. M18570 3. Set weekday Leave time and tempera- Note: Schedule times are programmable in ture. increments of 15 minutes. For each a. Press Select. Press ▲ or ▼ to press, the time increases or decreases set Leave time. by 15 minutes. SET b. Press Select. Press ▲ or ▼ to set Wake temperature. M18566 Pub.
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b. Press Select. Press ▲ or ▼ to b. Press Select. Press ▲ or ▼ to set Leave temperature. set Return temperature. SET SET M18561 M18562 5. Set weekday Sleep time and tempera- 4. Set weekday Return time and tempera- ture. ture. a. Press Select. Press ▲ or ▼ to a. Press Select. Press ▲ or ▼ to set Sleep time. set Return time. SET SET M18567 M18568 Pub. No. 12-5026-01 12 69-1609
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b. Press Select. Press ▲ or ▼ to Setting the Weekend Program set Sleep temperature. SET Note: For initial programming, you must set the weekday schedule as shown in Setting the Weekday Program before you can access weekend program- ming. If your weekday is already M18563 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 ▲
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Example shows Cool setting. b. Press Select. Press ▲ or ▼ to set Leave temperature. b. Press Select. Press ▲ or ▼ to SET set Wake temperature. SET M18551 M18549 3. Set weekend Return time and tempera- ture. Note: When setting the Weekend Program, a. Press Select. Press ▲ or ▼ to the days SAT SUN display. set Return time. 2. Set weekend Leave time and tempera- SET ture. a. Press Select. Press ▲ or ▼ to set Leave time. SET M18552 Pub. No. 12-5026-01 M18550 14 69-1609
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b. Press Select. Press ▲ or ▼ to b. Press Select. Press ▲ or ▼ to set Return temperature. set Sleep temperature. SET SET M18553 M18555 5. Press Select. End displays. 4. Set weekend Sleep time and tempera- ture. SET a. Press Select. Press ▲ or ▼ to set Sleep time. SET M18556 After five seconds, your thermostat displays the current day, time and temperature. M18554 Pub. No. 12-5026-01 15 69-1609
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Note: The temporary temperature setting remains in effect until the next program period. To cancel, press Hold twice and wait five seconds. M18557 Indefinite Temperature Hold 6. Return to Step 1., Setting the Week- The Hold key allows you to hold a tempera- day Program to program the opposite ture indefinitely. When Hold is active, Hld mode, (heating) or (cooling). displays continuously. Your weekday and weekend schedules are 1. Press Hold. now programmed. 2. Press ▲ or ▼ key to set
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3. To cancel, press Hold and wait five seconds. Hold Select System and Fan Use the SYSTEM and FAN switches to change the settings. FAN SYSTEM System Setting Auto On Cool Off Heat To select the desired system setting, slide the SYSTEM switch in the lower right corner of M20541 SYSTEM SWITCH the thermostat. SYSTEM settings control the thermostat operation as follows: Cool: The thermostat controls the cooling. Off: Both the heating and cooling are off. Heat: The thermostat controls the heating
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Heat and Cool Indicators Fan Setting Indicates a call for heating. To select the desired fan setting, slide the FAN switch in the lower left corner of the Indicates a call for cooling. thermostat. Hold Select M18548 Note: In the programming mode, the and indicate the system setting. FAN SYSTEM Auto On Cool Off Heat M20542 FAN SWITCH FAN settings control the system fan as follows: Auto: Fan operates with equipment. On: Fan operates continuously. Pub. No. 12-5026-01 18 69-1609 PM TUE
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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 cooling, the system will not start up again for the compressor or other equipment. at least five minutes after it turns off (com- To avoid possible equipment damage, pressor is off and cant be heard). This occurs do not operate cooling when outside when you change the SYSTEM switch temperature is below 50°F (10°C). position while the
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TROUBLESHOOTING GUIDE Symptom Possible Cause Action Display will not Thermostat is not Check if the thermostat is mounted and come on. being powered. latched on the wallplatemount and latch the thermostat on the wallplate. Check if the circuit breaker is trippedreset the circuit breaker. Check if the fuse is blownreplace the fuse. Check if the system switch is in the Off positionset to Heat or Cool. Temperature The upper or lower Check that the temperature setpoints are settings will not tem
