Trane TAYSTAT 540 Thermostat User Manual

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Programmable Heat-Pump Thermostat  
TAYSTAT 540  
OWNER’S GUIDE  
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FEATURES  
HOLD KEY OVERRIDES PROGRAM  
OR HOLDS TEMPERATURE INDEFINITELY.  
INCREASE KEY:  
INCREASE  
TEMPERATURE,  
SET TIME, OR SCROLL  
THROUGH DAYS OF WEEK.  
The Trane Co. sells comfort systems.  
Comfort is achieved through matching the LCD DISPLAY  
correct equipment and controls. This  
thermostat is designed to provide the  
maximum comfort for your needs.  
SELECT KEY: SET  
CURRENT DAY AND  
TIME, OR SET  
PROGRAM DAY  
AND TIME.  
Hold  
Select  
PM  
Some of the basic offerings are:  
Program up to four time periods and  
temperature settings to complement  
your lifestyle.  
DECREASE KEY:  
DECREASE  
TEMPERATURE,  
SET TIME, OR SCROLL  
BACKWARD THROUGH  
DAYS OF WEEK.  
FAN  
Auto On  
SYSTEM  
Cool Off Heat Em. Ht.  
Set different schedules for weekdays  
and weekends.  
SYSTEM SWITCH. SLIDE TO  
FAN SWITCH  
COOL, OFF, OR HEAT FOR  
PROGRAMMING. SLIDE TO  
COOL, OFF, HEAT, OR EM. HT.  
FOR CURRENT SETTING.  
AUTO: FAN RUNS ONLY  
WHEN SYSTEM OPERATES.  
ON: FAN RUNS  
Programs are permanently held in  
memory in the event of a power failure.  
CONTINUOUSLY.  
M14312  
Indefinite temperature hold.  
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Preprogrammed for your convenience.  
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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:  
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.  
SET  
TEMPORARY  
PM  
Mo Tu We Th Fr Sa Su  
WAKE LEAVE RETURN SLEEP  
CURRENT DAY DISPLAYS  
IN NORMAL MODE.  
MONDAY THROUGH FRIDAY  
DISPLAY DURING WEEKDAY  
PROGRAMMING MODE.  
SATURDAY AND SUNDAY  
DISPLAY DURING WEEKEND  
PROGRAMMING MODE.  
FLAME DISPLAYS DURING  
HEATING OR WHILE  
DURING NORMAL MODE, THE  
CURRENT PERIOD DISPLAYS.  
DURING PROGRAMMING, THE  
PERIOD BEING PROGRAMMED  
DISPLAYS (WAKE, LEAVE,  
RETURN OR SLEEP).  
PROGRAMMING HEATING  
SETPOINT. SNOWFLAKE  
DISPLAYS DURING COOLING  
OR WHILE PROGRAMMING  
COOLING SETPOINT.  
M14308  
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PROGRAMMING YOUR  
THERMOSTAT  
SET  
PM  
M12591  
CLOCK  
Setting the Current Day and Time  
To set or reset the current day and time,  
follow these instructions.  
Note:  
While setting the current time, SET  
displays.  
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.  
SET  
M12593  
Note:  
To exit the programming mode at  
any time, press Hold.  
3. Press Hold to exit programming mode.  
1. To set Current Time, press Select twice.  
Press or to set current time.  
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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  
SLEEP  
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.  
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  
6:00 AM  
Heat Setpoint  
70°F (21°C)  
Cool Setpoint  
78°F (26°C)  
Wake  
Leave  
Return  
Sleep  
8:00 AM  
5:00 PM  
10:00 PM  
62°F (17°C)  
70°F (21°C)  
62°F (17°C)  
85°F (29°C)  
78°F (26°C)  
75°F (24°C)  
To begin programming your weekday and weekend schedules, fill inTables 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.  
Heating  
Temperature  
Cooling  
Temperature  
Period  
Start Time  
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.  
Heating  
Temperature  
Cooling  
Temperature  
Period  
Start Time  
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).  
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Setting the Weekday Program  
IMPORTANT  
Hold  
Select  
Always press the keys with your  
fingertip or similar blunt tool. Sharp  
objects like pen and pencil points will  
damage the keyboard.  
PM  
1. Slide the SYSTEM switch to the setting  
you want to program (Heat or Cool).  
FAN  
Auto On  
SYSTEM  
Cool Off Heat Em. Ht.  
Throughout programming, the thermo-  
M17336  
SYSTEM SWITCH  
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).  
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2. Set weekday Wake time and tempera-  
ture.  
SET  
a. Press Select four times. Press ▲  
or 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-  
ture.  
M17331  
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  
AM  
b. Press Select. Press or to  
set Wake temperature.  
M17333  
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b. Press Select. Press or to  
b. Press Select. Press or to  
set Leave temperature.  
set Return temperature.  
SET  
SET  
M17314  
M17312  
5. Set weekday Sleep time and tempera-  
ture.  
4. Set weekday Return time and tempera-  
ture.  
a. Press Select. Press or to  
set Sleep time.  
a. Press Select. Press or to  
set Return time.  
SET  
SET  
PM  
PM  
M17315  
M12628  
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b. Press Select. Press or to  
Setting the Weekend Program  
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 program-  
ming. If your weekday is already  
programmed, you can access weekend  
programming by pressing Select 12  
times.  
SET  
M17316  
IMPORTANT:  
Before pressing another key,  
continue with Setting the Weekend  
Program.  
1. Set weekend Wake time and tempera-  
ture.  
a. Press Select. Press or to  
set Wake time.  
SET  
AM  
M17317  
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b. Press Select. Press or to  
set Wake temperature. Example  
shows Cool setting.  
2. Set weekend Leave time and tempera-  
ture.  
a. Press Select. Press or to set  
Leave time.  
SET  
SET  
AM  
M17318  
Note: When setting the Weekend Program,  
M17319  
the days Sa Su display.  
b. Press Select. Press or to  
set Leave temperature.  
SET  
M17320  
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3. Set weekend Return time and tempera-  
ture.  
4. Set weekend Sleep time and tempera-  
ture.  
a. Press Select. Press or to  
set Return time.  
a. Press Select. Press or to  
set Sleep time.  
SET  
SET  
PM  
PM  
M17321  
M17323  
b. Press Select. Press or to  
b. Press Select. Press or to  
set Return temperature.  
set Sleep temperature.  
SET  
SET  
M17322  
M17324  
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5. Press Select. End displays.  
Temporary Temperature Hold  
1. Press or key twice to set a  
SET  
temporary temperature.  
TEMPORARY  
PM  
M17325  
M17326  
PM  
Note:  
The temporary temperature setting  
remains in effect until the next  
program period. To cancel, press  
Hold twice and wait five seconds.  
M17300  
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.  
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Indefinite Temperature Hold  
System and Fan  
Use the SYSTEM and FAN switches to  
change the settings.  
The Hold key allows you to hold a tempera-  
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  
the thermostat.  
2. Press or key to set indefinite  
temperature setting.  
Hold  
Select  
PM  
M17327  
3. To cancel, press Hold and wait five  
FAN  
Auto On  
SYSTEM  
Cool Off Heat Em. Ht.  
seconds.  
M17336  
SYSTEM SWITCH  
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SYSTEM settings control the thermostat  
operation as follows:  
Cool: Normal setting for months when your  
home needs cooling (air condition-  
ing). Digital display shows a  
M17329  
snowflake  
Both heating and cooling are off.  
Heat: Normal setting for months when your  
when cooling is on.  
NOTE: In the programming mode, the  
Off:  
and  
indicate the system setting.  
home needs heating. Digital display  
Fan Setting  
To select the desired fan setting, slide the  
FAN switch in the lower left corner of the  
thermostat.  
shows a flame  
when heating is  
on.  
Em. Ht.: Switch to this setting when your  
home needs heat, but your equip-  
ment needs servicing or is not  
working properly. In this mode, the  
thermostat controls only the backup  
heat. The heat pump is off.  
FAN  
Auto On  
SYSTEM  
Cool Off Heat Em. Ht.  
M17337  
FAN SWITCH  
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Auto: Normal setting for most homes.  
Some systems may delay the fan  
turning on and off with the equip-  
ment.  
points to Em Ht when the system is in  
emergency heat mode. The indicator may  
also point to Aux Ht if the system calls for  
additional back-up heating.  
On:  
The fan runs continuously. Use for  
improved air circulation and air  
quality.  
INDICATOR  
Em Ht  
Aux Ht  
FAN  
Auto On  
Set  
Room  
M10287  
FAN  
SWITCH  
M10273  
Auxiliary Heat  
The auxiliary heaters assist the heat pump  
under normal conditions when low outdoor  
temperature occurs. The indicator points to  
Aux Ht when the auxiliary heating equipment  
operates.  
Emergency Heat  
The Emergency Heat feature allows you to  
“turn on” the electric heat section of the  
system by moving the system switch to the  
Em. Ht. position. The indicator flashes and  
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Minimum Off-Timing  
CAUTION  
Your thermostat comes equipped with a  
Equipment Damage Hazard.  
minimum off-timer. At certain times during  
heating or 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 off-  
timer is also triggered during power interrup-  
tion and power restoration. You will know the  
minimum off time is in effect by a flashing  
Can cause permanent damage to  
the compressor or other equipment.  
To avoid possible equipment damage,  
do not operate cooling when outside  
temperature is below 50°F (10°C).  
See equipment manufacturer instruc-  
tions. To avoid possible compressor  
damage, allow the compressor to  
remain off for five minutes before  
restarting.  
or  
on the display.  
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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.  
Temperature  
The upper or lower  
temperature limits  
were reached.  
Check that the temperature setpoints are  
within range:  
Heating: 50° to 99° F (10° to 37° C)  
Cooling: 50° to 99° F (10° to 37° C).  
settings will not  
change (Example:  
cannot set the  
heating higher or the  
cooling lower).  
(Contiuned)  
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Troubleshooting (Contiuned)  
Symptom  
Possible Cause  
Action  
Heating will not  
come on.  
No power to the  
thermostat.  
System selection is room temperature to fall.  
Check that the setpoint is above room  
temperature–reset temperature or wait for  
not set to Heat.  
Heating setpoint is  
below room  
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.  
Wait five minutes for the system to respond.  
temperature.  
Cooling will not  
come on.  
No power to the  
thermostat.  
System selection is room temperature to rise.  
Check that the setpoint is below room  
temperature–reset temperature or wait for  
not set to Cool.  
Cooling setpoint is  
above room  
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 Cool position.  
Wait five minutes for the system to respond.  
temperature.  
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Troubleshooting (Contiuned)  
Symptom  
Possible Cause  
Action  
System on indicator Heating/cooling  
Wait a minute after seeing the flame or  
snowflake and then check the registers.  
and  
is lit,  
equipment turns on  
but no warm or cool the fan when the  
air is coming from  
the registers.  
equipment has  
reached the  
setpoint.  
System on indicator Minimum off timer is Wait five minutes until the minimum off timer  
or  
is  
in effect.  
is complete.  
flashing.  
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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 one year from the date of  
the original purchase, Warrantor will furnish without charge a new thermostat. Any local transporta-  
tion, related service labor and diagnosis calls are not included.  
This warranty does not cover failure of your Thermostat if it is damaged while in your possession or if  
the failure is caused by unreasonable use. In no event shall Warrantor be liable for incidental or  
consequential damages. In no event shall any implied warranty of merchandise or fitness for use  
exceed the term of the limited warranty stated above.  
Some states do not allow limitations on how long an implied warranty lasts or do not allow the  
exclusion or limitation of incidental or consequential damages, so the above limitation may not apply to  
you. This warranty gives you specific legal rights, and you may also have other rights which vary from  
state to state.  
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Parts will be provided by our factory organization or an authorized service organization in your area.All you  
need to do is look us up in the Yellow Pages or write to the address given below. 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 1-877-880-3381, Monday-Friday, 7:00 am-5:30 pm, Central  
time.  
For service, contact your local heating and cooling contractor.  
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American Standard Inc.  
Troup Highway  
Pub. No. 22-5185-01  
® U.S. Registered Trademark  
Tyler, TX 75711-9010  
69-1229 6-99 G.H. Printed in Mexico  

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