Legrand RT-24 User Manual

Rt-24, Warning

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Please read all instructions before installing

DESCRIPTION AND OPERATION

The RT-24 is an astronomic time clock that controls the connected light or fan

either manually or through user programmed times.
Upon installation the user enters the correct longitude/latitude coordinates,

date, and local time. (See SETUP.) This ensures that once the schedules are

programmed, the load turns ON/OFF at the correct local times.

Lighted Switch

To help locate the switch button in a dark room, a green LED illuminates the ON/

OFF button while the controlled load is OFF. When the load is ON, the LED is OFF.

INSTALLATION & WIRING

WARNING

Disconnect power at the circuit breaker

before installing this product.

1. Prepare the switch box

After the power is turned OFF at

the circuit breaker box, remove

the existing wall plate and

mounting screws. Pull the old

switch from the wall box.

2. Identify the type of circuit

In a single pole circuit, two single

wires connect to two screws on

the existing switch. A ground

wire may also be present and

connected to a ground terminal

on the old switch. A neutral wire

should also be present in the

wall box.

SPECIfICATIONS

Voltage…………………….. ...........................................120/277VAC, 50/60Hz

Load

@120VAC…………. .........................0-800W tungsten or ballast, 1/6HP

@277VAC…………. ...........................................0-1200W ballast, 1/6HP

Environment……………….. ................................................ Indoor Use Only

Operating Temperature…… ......................32˚ to 131˚ F (0˚ to 50˚ C)

Humidity………………….. ............................... 95% RH, non-condensing

Tools Needed

Insulated Screwdriver

Wire Strippers

Syracuse, NY 13221-4822

WARNING

Only connect the RT-24 to a Single Pole Circuit.

The RT-24 is not suitable for 3-way switching.

If the existing wiring does not match the description for a Single

Pole Circuit, you should consult with a qualified electrician.

3. Prepare the wires.

Tag the wires currently connected to the existing switch,

so that they can be identified later. Disconnect the wires.

Make sure the insulation is stripped off the wires to

expose their copper cores to the length indicated by the

“Strip Gage” (approximately ½ inch).

4. Wire the time switch.

Twist the existing wires together with the wire leads on the RT-24 as indicated

in the table below. Cap them securely using the wire nuts provided.

Power wire from the circuit (hot)

to

Black wire on RT-24

Power wire from the lamp or fan (load) to

Red wire on RT-24

Neutral wires from the circuit

to

White wire on RT-24

Ground wire from the circuit

to

Ground terminal on RT-24

5. Put the RT-24 in the wall box with the display

positioned above the ON/Off button.

Secure it to the wall box with the screws provided.

6. Attach the cover plate.
7. Restore power to the circuit.

Turn on the breaker or replace the fuse.

SETUP

To access the programming buttons, place your finger

or screwdriver behind the lip at the top of the ON/OFF

button and pull it toward you. Slide the ON/OFF button

down over the wallplate.

Buttons

The three programming buttons

are used to set up the astronomic

time switch according to the user’s

preferences and location.

RT-24 Menu Options

From the standard display,

known as the “MAIN PAGE”

press and release the ↑

button to enter SETUP menu.

Press the ↓ button to

move to desired SETUP

menu option.

When the option that

you want to program is

highlighted, press the

CENTER button.

SETUP

SET TIME AND DATE

LOCATION

PREFERENCES

SCHEDULING

MAIN PAGE

DST

PM

Tue 03/31/2009

12:04

PROG

SETUP

SET TIME AND DATE

LOCATION

PREFERENCES

SCHEDULING

MAIN PAGE

Once in the SETUP menu if there is no activity for 10 minutes, the unit

automatically exits out to the MAIN PAGE.

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RT-24

Astronomical

Time Clock

Wall Switch

Call 800.223.4185 for Technical Support

Display

Lighted Switch

ON/OFF button

Strip Gage

1/2"

12.7 mm

Call 800.223.4185 for Technical Support

SET TIME AND DATE MENU

Within the SET TIME AND DATE menu you will enter the correct time, date and

Daylight Savings Time (DST) start and end days.

Setting

Steps

TIME
Hour

1. From the SETUP menu highlight SET TIME AND

DATE and press the CENTER button. TIME should be

highlighted.

Press the CENTER button to highlight hour.
2. Press the ↓ button to decrease hour or the ↑ button

to increase hour.

3. Press the CENTER button to save hour setting and

move highlighted cursor to minute.

Minute

Follow step 2 above.
Press the CENTER button to save time setting.

DATE

1. Press the ↓ button to highlight DATE.

Month

1. Press the CENTER button to highlight month.
2. Press the ↓ button to decrease the month or the ↑

button to increase the month.

3. Press the CENTER button to save month setting and

move highlighted cursor to day.

Day

Follow step 2 above.
Press the CENTER button to save day setting and move

highlighted cursor to year.

Year

Follow step 2 above.
Press the CENTER button to save year setting.

DAYLIGHT

SAVINGS TIME

(DST)

Factory Default Setting: DST ENABLED (The unit will

automatically adjust for Daylight Savings Time). Press

the ↓ button to highlight DST

DST
When enabled,

DST appears in

the upper right

corner of the

MAIN PAGE.

1. Press the CENTER button to highlight ENABLED.
2. Press the ↑ button to switch between ENABLED and

DISABLED.

3. Press the CENTER button to save DST setting.

Start - Week

(Input week when

DST starts)

1. Press the ↓ button to highlight START. Press the

CENTER button to highlight 1st.

2. Press the ↓ button to decrease the week of the

month or the ↑ button to increase the week of the

month.

3. Press the CENTER button to save the week and move

highlighted cursor to the month.

Start – Month

(Input month

when DST starts)

Follow step 2 above.
Press the CENTER button to save month.

End – Week

Press the ↓ to highlight End. Follow same steps for

Start – Week.

End – Month

Follow same steps for START - Month.

To exit SET TIME AND DATE menu, press the ↓ button to highlight PREVIOUS

menu. Press the CENTER button to select and return to the SETUP menu.

LOCATION MENU

Within the LOCATION menu you will be required to enter the local longitude/

latitude coordinates and time zone. If you do not know this information, you can

use a search engine on the Internet. In the search field, type the words “longitude

and latitude.” It is necessary to enter the longitude and latitude in degrees. Then

perform a second search for “time zone.”

Setting

Steps

TIME ZONE

1. From the SETUP menu highlight LOCATION and press

the CENTER button. TIME ZONE should be highlighted.

Press the CENTER button to select the time zone.
2. Press the ↓ button to decrease the time zone.

Press the ↑ button to increase the time zone.

3. Press the CENTER button to save time zone setting.

LONGITUDE

1. Press the ↓ button to highlight LONGITUDE. Press the

CENTER button to select the longitude

Follow step 2 above.
Press the CENTER button to save longitude setting.

LATITUDE

1. Press the ↓ button to highlight LATITUDE. Press the

CENTER button to select the latitude.

Follow Step 2 above.
Press the CENTER button to save latitude setting.

To exit the LOCATION menu, press the ↓ button to highlight PREVIOUS MENU.

Press the CENTER button to select and return to the SETUP menu.

PREfERENCES

The PREFERENCES menu allows the user to customize the unit’s features

including the time/date format, sound and flash.
Time format – choose between a 12-hour or 24-hour format
Date format – choose between MM/DD/YY or DD-MM-YY
Sound – When SOUND is enabled the RT-24 will beep every 5 seconds when the

load is going to be turned OFF in less than a minute. It will also beep each time

the user presses the ↑, the CENTER, or the ↓ button. A small ear icon will

appear on the MAIN PAGE when sound is enabled.

Flash – When FLASH is enabled the RT-24 turns OFF the load for 1 second and

then turns it back ON to warn the user that the load is turning OFF in 1 minute.

When flash is enabled, a lightening bolt icon will appear on the MAIN PAGE.

Setting

Steps

TIME FORMAT

1. From the SETUP menu highlight PREFERENCES

and press the CENTER button. TIME FMT should be

highlighted.

Press the CENTER button to select time format.
2. Press ↑ button to change format.
3. Press the CENTER button to save time format setting

and to move highlighted cursor back to TIME FMT.

DATE FORMAT

1. Press the ↓ button to highlight DATE FMT. Press the

CENTER button to select date format.

Follow step 2 above.
Press the CENTER button to save date format.

SOUND

1. Press the ↓ button to highlight SOUND. Press the

CENTER button to select the sound setting.

Follow step 2 above to enable or disable sound.
Press the CENTER button to save setting.

FLASH

1. Press the ↓ button to highlight FLASH. Press the

CENTER button to select the flash setting.

Follow step 2 above to enable or disable flash.
Press the CENTER button to save setting.

To exit the PREFERENCES menu, press the ↓ button to highlight PREVIOUS

MENU. Press the CENTER button to select and return to the SETUP menu.

SCHEDULING

The RT-24 has 8 programs allowing the user flexibility in setting schedules to turn

the connected load ON/OFF.

Setting

Steps

PROGRAM

1. From the SETUP menu highlight SCHEDULING and

press the CENTER button. PROGRAM should be

highlighted.
Press the CENTER button to select program #.

2. Press the ↓ button to decrease the program and

the ↑ button to increase the program #.

3. Press the CENTER button to save the program #.

Day(s) - Set the

days of the week

the lights will

turn ON for that

particular program

1. Press the ↓ button to highlight DAY(s). Press

the CENTER button to select the days when the

program will operate.

2. Press the ↑ to choose the day(s); choices include:

- None (program is not in use).
- All (program turns ON the connected load every day).
- Mon – Fri (program turns ON the connected load

Monday through Friday).

- Weekends (program turns ON the connected load

Saturday and Sunday.

- Each individual day of the week (choose the day of

the week that the connected load should turn ON).

Press the CENTER button to save setting.

ON – Program the

time the connected

load turns ON

Press the ↓ button to highlight ON. Press the CENTER

button to select what time the load will turn on.
Follow step 2 above to set the ON time; choices

include:

- TIME (program a specific time to turn ON the load).
- DUSK (program up to 99 minutes before or after

dusk for the load to turn ON. Note: this is one of the

reasons that it is important that the correct time

zone, longitude/latitude coordinates are entered so

that the time switch can determine when dawn and

dusk will take place).

- DAWN (program up to 99 minutes before or after

dawn for the load to turn ON.

Press the CENTER button to save setting.

OFF – Program the

time the connected

load turns OFF

Press the ↓ button to highlight OFF. Press the CENTER

button to select what time the load will turn off.
Follow Step 2 above to set the OFF time; choices are

the same as for the ON time.
Press the CENTER button to save setting.

Follow the same steps to set Programs 1-8.
To exit the SCHEDULING menu, press the ↓ button to highlight PREVIOUS menu.

Press the CENTER button to select and return to the SETUP menu.

VIEWING SETTINGS

Once the RT-24 has been completely set up, it is possible to see the various

programs without needing to enter the SETUP menu. From the MAIN PAGE press

and hold the ON/OFF button. After 5 seconds the display changes to show the

sunrise and sunset time. Continue to press and hold the ON/OFF button. The

display will cycle through the 8 programs. Once the RT-24 has completed this

cycle, it will continue to cycle through the programs as long as the button is being

pressed.

MANUAL-ON

When the lights are turned ON manually, the word MANUAL appears on the

bottom left corner of the display. The load stays ON until it is manually turned

OFF or until a scheduled program turns the load off. For example, if the load was

scheduled to be turned OFF at a set time, such as 10:00 PM, and it was manually

turned ON before 10:00, then at 10:00 the load automatically turns OFF and the

program number that turned it OFF will replace MANUAL on the display.

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TROUBLESHOOTING

Lighted switch is Off, no load response to ON/Off button press:
- Make certain that the circuit breaker is on and functioning.
Lighted switch is ON, no load response to ON/Off button press:
- Check the light bulb and/or motor switch on the fan mechanism.
If load does not respond properly after following troubleshooting, turn Off

power to the circuit then check wire connections or call technical support.

POWER fAILURE

In the event of a loss of power to the RT-24, the unit will maintain the correct

time, location and settings for 72 hours.

PRODUCT RESET

The RT-24 has a reset button located under

the ON/OFF button. If the unit has lost power

for an extended period of time (more than 72

hours) and the unit appears to be functioning

abnormally (the display is not on or lights

are not turning ON/OFF according to the

appropriate schedule), it may be necessary

to reset the unit. Press and release the reset

button. The display will reset so that the Watt

Stopper logo appears as it does upon initial

power up. At this point, the user will be able to

set the date, time and location and reset the

programs.

Call 800.223.4185 for Technical Support

340897 12252_RT-24.indd 1-6

8/25/09 4:04 PM

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