1. Introduzione
This manual provides detailed instructions for the installation, setup, operation, and maintenance of the Intermatic ST01 24-Hour In-Wall Timer. The ST01 is a heavy-duty digital timer designed for in-wall flush mounting, suitable for controlling various electrical loads including incandescent and fluorescent lighting. Please read this manual thoroughly before installation and use to ensure safe and proper operation.

Image 1: Front view of the Intermatic ST01 24-Hour In-Wall Timer. This image displays the timer's digital LCD screen and control buttons, designed for flush mounting within a standard wall box.
2. Informazioni di sicurezza
WARNING: Risk of Electric Shock. Installation requires working with high voltage wiring. Always turn off power at the circuit breaker or fuse box before installation or servicing. Installation should be performed by a qualified electrician or trained personnel.
- Ùn installate micca cù e mani bagnate.
- Do not use in locations where it may be exposed to water or extreme humidity.
- Assicuratevi chì tutti i cunnessione di i fili sianu sicuri è conformi à i codici elettrici lucali.
- This device is rated for 120-277V, 15A, 1800W. Do not exceed these ratings.
- Solu per usu interni.
3. Cuntenutu di u pacchettu
Verificate chì tutti i cumpunenti sò presenti prima di principià l'installazione:
- Intermatic ST01 24-Hour In-Wall Timer (1 unit)
- Viti di muntatura (2 unità)
- Dadi per filu (3 unità)
- Manuale d'istruzzioni (Stu documentu)
4. Installazione
Segui questi passi per una stallazione sicura è curretta:
- Spegne l'alimentazione: Locate the circuit breaker or fuse that supplies power to the switch box where the timer will be installed. Turn off the power completely. Verify power is off using a voltagè testatore.
- Elimina l'interruttore esistente: Carefully remove the wall plate and unscrew the existing switch from the wall box. Disconnect the wires from the old switch, noting which wire was connected to which terminal (typically Line, Load, and Ground).
- Cablà u timer: The ST01 timer typically has three wires:
- Black (Line): Cunnette vi à u filu caldu chì vene da l'interruttore automaticu.
- Red (Load): Connect to the wire going to the light fixture or appliance.
- Verde (Terra): Connect to the bare copper or green ground wire in the wall box.
- Muntà u cronometru: Gently fold the wires into the wall box. Insert the timer into the wall box and secure it with the provided mounting screws.
- Installa a placa murale: Attach a standard wall plate (not included) over the timer.
- Ripristina l'energia: Riattivate a corrente à l'interruttore automaticu o à a scatula di fusibili.
Note: The ST01 is designed for flush mounting and requires a standard electrical wall box.
5. Configurazione iniziale è prugrammazione
À a prima accensione o dopu una mancanza di correntetage, the timer's internal CR2 lithium battery maintains settings, but you may need to set the current time and program schedules.
- Imposta l'ora attuale:
- Press u CLOCK buttone.
- Aduprà u ORA è MINUTU buttons to adjust the current time. The display operates in a 12-hour format (AM/PM).
- Press CLOCK torna per salvà è surtite.
- Program ON/OFF Schedules: The ST01 allows for multiple ON/OFF programs over a 24-hour period.
- Press u PROG buttone. U display mostrerà "1 ON".
- Aduprà ORA è MINUTU buttoni per impostà u tempu d'accensione desideratu per u prugramma 1.
- Press PROG di novu. U display mostrerà "1 OFF".
- Aduprà ORA è MINUTU buttoni per impostà u tempu di spegnimentu desideratu per u prugramma 1.
- Repeat for additional programs (e.g., "2 ON", "2 OFF", etc.) as needed.
- Press CLOCK to save all programs and return to normal operation.
Refer to the timer's LCD display for visual cues during programming.
6. Funziunamentu di u cronometru
Once programmed, the ST01 timer will automatically switch connected devices ON and OFF according to your set schedules. You can also manually override the timer:
- Manuale ON/OFF: Press u MANUALE button to cycle through ON, OFF, and AUTO modes.
- ON: U dispusitivu cunnessu resterà ACCESO, annullendu tutti i prugrammi.
- OFF: U dispusitivu cunnessu resterà SPENTU, annullendu tutti i prugrammi.
- AUTO: The timer will operate according to the programmed schedules. This is the default operating mode.
- Random Mode (if available): Some models may include a random mode for security. Consult the specific model's features if this is desired.
7. Mantenimentu
The Intermatic ST01 timer requires minimal maintenance:
- Pulizia: Wipe the timer's surface with a soft, damp tela. Ùn aduprate micca detergenti abrasivi o solventi.
- Batteria: The internal CR2 lithium battery maintains time and program settings during power outages. This battery is typically long-lasting and not user-replaceable. If the display becomes dim or settings are lost frequently, professional servicing may be required.
- Ispezione: Periodically inspect the timer and wall plate for any signs of damage or loose connections.
8. Risoluzione di prublemi
| Prublemu | Causa Possibile | Soluzione |
|---|---|---|
| U display di u timer hè viotu. | Nisuna alimentazione à u timer. | Verificate l'interruttore automaticu/fusibile. Assicuratevi chì i cunnessione di i fili sianu sicure. |
| U timer ùn si accende/spegne micca à l'ore prugrammate. | Incorrect programming or timer is in Manual ON/OFF mode. | Verify program settings. Ensure timer is in AUTO mode by pressing the MANUALE buttone finu à chì "AUTO" sia visualizatu. |
| Time or programs are lost after power outage. | Batteria interna bassa o scarica. | The CR2 lithium battery is designed for long life. If this occurs frequently, the unit may require replacement or professional service. |
| Connected device does not turn ON/OFF. | Faulty wiring, faulty load, or timer malfunction. | Verify wiring connections. Test the connected device directly. If issues persist, consult a qualified electrician. |
9. Specificazioni
- Mudellu: ST01
- Tipu: 24-Hour In-Wall Digital Timer
- Voltage: 120 - 277 V
- Ampera: 15 A
- putenza: 1800 W
- Poli: 1
- Operazione: ON/OFF, Digital, LCD Display
- Impostazione di u tempu: Formatu di 12 ore
- Batteria: CR2 Lithium (for memory backup)
- Température de fonctionnement : 32 °F à 104 °F (0 °C à 40 °C)
- Muntamentu: Muntatura à scorri
- Dimensioni (in generale): 2.75" H x 1.75" W x 1.46" D (70mm H x 44mm W x 37mm D)
- Culore: Biancu
- Materiale: Metallu
- Certificazioni: Certificatu CSA
- Cumpatibilità: Incandescent, Fluorescent lighting
- Pesu di l'articulu: 8 ounces (circa 227 grammi)
10. Garanzia è Support
For warranty information and technical support, please contact Intermatic customer service. Keep your purchase receipt as proof of purchase.
Serviziu Clienti Intermatic:
- Websitu: www.intermatic.com
- Refer to the official Intermatic websitu per l'infurmazioni di cuntattu è i dettagli di garanzia più recenti.





