Trane TAYSTAT 540 User manual

OWNER’S GUIDE
Pub.No. 22-5185-01
Programmable Heat-Pump Thermostat
TAYSTAT 540
69-1229

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FEATURES
The Trane Co. 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:
•Program up to four time periods and
temperature settings to complement
your lifestyle.
•Set different schedules for weekdays
and weekends.
•Programs are permanently held in
memory in the event of a power failure.
•Indefinite temperature hold.
•Preprogrammed for your convenience.
M14312
FAN SYSTEM
Auto On Cool Off Heat Em. Ht.
Hold Select
PM
DECREASE KEY:
DECREASE
TEMPERATURE,
SET TIME, OR SCROLL
BACKWARD THROUGH
DAYS OF WEEK.
SELECT KEY: SET
CURRENT DAY AND
TIME, OR SET
PROGRAM DAY
AND TIME.
INCREASE KEY:
INCREASE
TEMPERATURE,
SET TIME, OR SCROLL
THROUGH DAYS OF WEEK.
HOLD KEY OVERRIDES PROGRAM
OR HOLDS TEMPERATURE INDEFINITELY.
LCD DISPLAY
FAN SWITCH
AUTO: FAN RUNS ONLY
WHEN SYSTEM OPERATES.
ON: FAN RUNS
CONTINUOUSLY.
SYSTEM SWITCH. SLIDE TO
COOL, OFF, OR HEAT FOR
PROGRAMMING. SLIDE TO
COOL, OFF, HEAT, OR EM. HT.
FOR CURRENT SETTING.

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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 “Sa Su” (Saturday Sunday) displays while programming the
weekend schedule. All settings are explained below:
TEMPORARY
PM
M14308
SET
Mo Tu We Th Fr Sa Su
WAKE LEAVE RETURN SLEEP
DURING NORMAL MODE, THE
CURRENT PERIOD DISPLAYS.
DURING PROGRAMMING,THE
PERIOD BEING PROGRAMMED
DISPLAYS (WAKE, LEAVE,
RETURN OR SLEEP).
FLAME DISPLAYS DURING
HEATING OR WHILE
PROGRAMMING HEATING
SETPOINT. SNOWFLAKE
DISPLAYS DURING COOLING
OR WHILE PROGRAMMING
COOLING SETPOINT.
CURRENT TEMPERATURE
DISPLAYS.HEATING AND
COOLING SETPOINT DISPLAYS
DURING PROGRAMMING.
TEMPORARY DISPLAYS
DURING TEMPORARY
TEMPERATURE HOLD.
SET DISPLAYS
WHILE SETTING
THE CLOCK.
CURRENT TIME DISPLAYS
IN NORMAL MODE. PERIOD
START TIME DISPLAYS IN
PROGRAMMING MODE.
CURRENT DAY DISPLAYS
IN NORMAL MODE.
MONDAY THROUGH FRIDAY
DISPLAY DURING WEEKDAY
PROGRAMMING MODE.
SATURDAY AND SUNDAY
DISPLAY DURING WEEKEND
PROGRAMMING MODE.

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PROGRAMMING YOUR
THERMOSTAT
CLOCK
Setting the Current Day and Time
To set or reset the current day and time,
follow these instructions.
IMPORTANT
Always press the keys with your
fingertip or similar blunt tool. Sharp
objects like pen and pencil points will
damage the keyboard.
Note: To exit the programming mode at
any time, press Hold.
1. To set Current Time, press Select twice.
Press ▲or ▼to set current time.
Note: While setting the current time, SET
displays.
2. To set Day of Week, press Select
again. Press ▲or ▼to set current day.
SET
PM
M12591
3. Press Hold to exit programming mode.
M12593
SET

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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? Consider the time required to reach your comfort level. Adjust the
Wake time to earlier when you know it will take the system longer to
reach your comfort temperature.
LEAVE Choose the time you want your heating or cooling system to start an
energy-saving mode while you are away at work or school.
How? Set the Leave temperature lower during heating season, and
higher during cooling season.

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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 during heating season, and higher during cooling season.

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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 and weekend schedules, fill in Tables 2 and 3.

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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.
Period Start Time
Heating
Temperature
Cooling
Temperature
Wake
Leave
Return
Sleep

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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.
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).
Period Start Time
Heating
Temperature
Cooling
Temperature
Wake
Leave
Return
Sleep

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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.
1. Slide the SYSTEM switch to the setting
you want to program (Heat or Cool).
Throughout programming, the thermo-
stat displays a flame (heating) or
snowflake (cooling) to help you
identify which mode you are program-
ming. At the end of Setting the Week-
end Program, you are prompted to
return to this step to program the
opposite mode. Example shows Cool
setting.
NOTE: To exit the programming mode at
any time, press Hold (the thermostat
saves your changes).
M17336
FAN
Auto On
Hold Select
PM
SYSTEM SWITCH
SYSTEM
Cool Off Heat Em. Ht.