Trane TAYSTAT 540 Thermostat User Manual

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

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.

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

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

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.

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,

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

b. Press Select. Press ▲ or ▼ to

set Wake temperature.

M17333

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b. Press Select. Press ▲ or ▼ to

set Leave temperature.

set Return temperature.

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

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

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

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

M17321

M17323

b. Press Select. Press ▲ or ▼ to

set Return temperature.

set Sleep temperature.

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

M17325

M17326

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

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.

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

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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