Programmable Thermostat ASYSTAT 340 OWNER’S GUIDE Pub. No.
FEATURES HOLD KEY OVERRIDES PROGRAM OR HOLDS TEMPERATURE INDEFINITELY. American Standard sells comfort systems. Comfort is achieved through matching the correct equipment and controls. This thermostat is designed to provide the maximum comfort for your needs. Some of the basic offerings are: INCREASE KEY: INCREASE SETPOINT, OR ADVANCE TO NEXT STEP. LCD DISPLAY Hold Select PM SELECT KEY: TO SET TIME AND DAY. TUE • Program up to four time periods and temperature settings to complement your lifestyle.
Your thermostat displays the current day, time, period, temperature and system ( for heating and for cooling) in normal mode. In programming mode, only the setting or settings being programmed display. For example “SAT SUN” (Saturday Sunday) displays while programming the weekend schedule. SET DISPLAYS WHILE SETTING THE CLOCK. CURRENT TEMPERATURE DISPLAYS. HEATING OR COOLING SETPOINT DISPLAYS DURING PROGRAMMING. CURRENT TIME DISPLAYS IN NORMAL MODE. PERIOD START TIME DISPLAYS IN PROGRAMMING MODE.
PROGRAMMING YOUR THERMOSTAT SET PM CLOCK M12591A Note: Setting the Current Day and Time 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 fingertip or similar blunt tool. Sharp objects like pen and pencil points will damage the keyboard. Note: While setting the current time, SET displays. SET To exit and save the time and day setting at any time, press Hold.
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.
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.
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.
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. Period Heating Temperature Start Time Cooling Temperature Wake Leave Return Sleep 8 Pub. No.
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. Period Heating Temperature Start Time Cooling 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 than 50°F (10°C). 9 Pub. No.
Setting the Weekday Program IMPORTANT Always press the keys with your fingertip or similar blunt tool. Sharp objects like pen and pencil points will damage the keyboard. Hold Select PM TUE 1. Slide the SYSTEM switch to the setting you want to program (Heat or Cool). FAN Auto On Throughout programming, the thermostat displays a flame (heating) or snowflake (cooling) to help you identify which mode you are programming.
2. Set weekday Wake time and temperature. a. Press Select four times. Press ▲ or ▼ to set Wake time. SET SET M18564 Note: When setting the Weekday Program, the days MON TUE WED THU FRI display. M18570 3. Set weekday Leave time and temperature. a. Press Select. Press ▲ or ▼ to set Leave time. Note: Schedule times are programmable in increments of 15 minutes. For each press, the time increases or decreases by 15 minutes. SET b. Press Select. Press ▲ or ▼ to set Wake temperature. M18566 11 Pub. No.
b. b. Press Select. Press ▲ or ▼ to set Leave temperature. SET Press Select. Press ▲ or ▼ to set Return temperature. SET M18561 M18562 5. Set weekday Sleep time and temperature. a. Press Select. Press ▲ or ▼ to set Sleep time. 4. Set weekday Return time and temperature. a. Press Select. Press ▲ or ▼ to set Return time. SET SET M18567 M18568 12 Pub. No.
b. Setting the Weekend Program Press Select. Press ▲ or ▼ to set Sleep temperature. Note: For initial programming, you must set the weekday schedule as shown in Setting the Weekday Program before you can access weekend programming. If your weekday is already programmed, you can access weekend programming by pressing Select 12 times. SET M18563 IMPORTANT: Before pressing another key, continue with Setting the Weekend Program. 1. Set weekend Wake time and temperature. a. Press Select.
Example shows Cool setting. b. b. Press Select. Press ▲ or ▼ to set Wake temperature. Press Select. Press ▲ or ▼ to set Leave temperature. SET SET M18551 3. Set weekend Return time and temperature. a. Press Select. Press ▲ or ▼ to set Return time. M18549 Note: When setting the Weekend Program, the days SAT SUN display. 2. Set weekend Leave time and temperature. a. Press Select. Press ▲ or ▼ to set Leave time. SET SET M18552 M18550 14 Pub. No.
b. Press Select. Press ▲ or ▼ to set Return temperature. b. SET Press Select. Press ▲ or ▼ to set Sleep temperature. SET M18553 M18555 5. Press Select. End displays. 4. Set weekend Sleep time and temperature. a. Press Select. Press ▲ or ▼ to set Sleep time. SET SET M18556 After five seconds, your thermostat displays the current day, time and temperature. M18554 15 Pub. No.
Note: The temporary temperature setting remains in effect until the next program period. To cancel, press Hold twice and wait five seconds. Indefinite Temperature Hold M18557 6. Return to Step 1., Setting the Weekday Program to program the opposite mode, (heating) or (cooling). The Hold key allows you to hold a temperature indefinitely. When Hold is active, Hld displays continuously. Your weekday and weekend schedules are now programmed. 1. Press Hold. Temporary Temperature Hold 2.
3. To cancel, press Hold and wait five seconds. Hold System and Fan Select PM TUE Use the SYSTEM and FAN switches to change the settings. System Setting FAN Auto On To select the desired system setting, slide the SYSTEM switch in the lower right corner of the thermostat. SYSTEM Cool Off Heat SYSTEM SWITCH M20541 SYSTEM settings control the thermostat operation as follows: Cool: The thermostat controls the cooling. Off: Both the heating and cooling are off.
Fan Setting Heat and Cool Indicators Indicates a call for heating. Indicates a call for cooling. To select the desired fan setting, slide the FAN switch in the lower left corner of the thermostat. Hold Select PM M18548 TUE Note: In the programming mode, the and indicate the system setting. FAN Auto On SYSTEM Cool Off Heat FAN SWITCH M20542 FAN settings control the system fan as follows: Auto: Fan operates with equipment. On: Fan operates continuously. 18 Pub. No.
Minimum Off-Timing CAUTION Your thermostat comes equipped with a minimum off-timer. At certain times during cooling, the system will not start up again for at least five minutes after it turns off (compressor is off and can’t be heard). This occurs when you change the SYSTEM switch position while the compressor is off or when you change the temperature setting, causing the compressor to turn off. The minimum offtimer is also triggered during power interruption and power restoration.
TROUBLESHOOTING GUIDE Symptom Possible Cause Action Display will not come on. Thermostat is not being powered. Check if the thermostat is mounted and latched on the wallplate–mount and latch the thermostat on the wallplate. Check if the circuit breaker is tripped–reset the circuit breaker. Check if the fuse is blown–replace the fuse. Check if the system switch is in the Off position–set to Heat or Cool. The upper or lower Temperature temperature limits settings will not were reached.
Troubleshooting (Contiuned) Symptom Possible Cause Action Heating will not come on. No power to the thermostat. System selection is not set to Heat. Heating setpoint is below room temperature. Check that the setpoint is above room temperature–reset temperature or wait for room temperature to fall. Check if the circuit breaker is tripped–reset the circuit breaker. Check if the fuse is blown–replace the fuse. Check if the system switch at the equipment is in the Off position–set to Heat position.
Troubleshooting (Contiuned) Symptom Possible Cause Action System on indicator and is lit, but no warm or cool air is coming from the registers. Heating/cooling equipment turns on the fan when the equipment has reached the setpoint. Wait a minute after seeing the flame or snowflake and then check the registers. System on indicator or is flashing Minimum off timer is in effect. Wait five minutes until the minimum off timer is complete. 22 Pub. No.
LIMITED WARRANTY Low Voltage Room Thermostats This warranty is extended by American Standard Inc., to the original purchaser and to any succeeding owner of the real property to which the Thermostat is originally affixed, and applies to products purchased and retained for use within the U.S.A. and Canada. If any part of your Thermostat fails because of a manufacturing defect within five years from the date of the original purchase, Warrantor will furnish without charge a new thermostat.
Parts will be provided by our factory organization or an authorized service organization in your area listed in the yellow pages. If you wish further help or information concerning this warranty, contact: American Standard Inc. Troup Highway Tyler, TX 75711-9010 Attention: Manager, After Sales Support CUSTOMER ASSISTANCE If, after reading this guide, you have any questions concerning the operation of your thermostat, please call the Thermostat Customer Assistance Helpline at 1-800-500-2041.
