1. Producte acabatview
The Intermatic ET8215C Astronomic Electronic Time Switch is designed for automated weekly scheduling of electrical loads. It features multi-volt operation, precise to-the-minute programming, and an astronomic function that automatically adjusts ON/OFF times based on local sunrise and sunset. This 2-circuit, 30-Amp time switch is housed in a durable Type 1 steel enclosure, providing reliable control for various lighting and electrical applications.

Figura 1: Frontal view of the Intermatic ET8215C Astronomic Electronic Time Switch with the cover open, showing the display and control buttons.
Característiques principals:
- Automated Weekly Scheduling: Enables automatic load switching according to a preset weekly schedule.
- Versatile Multi-Volt Operation: Compatible with 120-277 VAC at 50/60 Hz electrical systems.
- Precision To-the-Minute Programming: Allows for accurate load control and energy savings.
- Astronomic Feature: Provides automatic sunset ON and sunrise OFF settings, eliminating the need for separate photo controls.
- Còpia de seguretat de la bateria: Maintains programming during power outages.
- Automatic Daylight Saving Time Corrections: Adjusts automatically without user interaction.
2. Informació de seguretat
ADVERTÈNCIA: Risc de descàrrega elèctrica. More than one disconnect switch may be required to de-energize the equipment before servicing. Installation and servicing should only be performed by qualified personnel. Always disconnect power at the circuit breaker or fuse box before installing or servicing this device.
- Use 10-18 gauge copper conductors rated for at least 75°C (167°F) for all connections.
- Assegureu-vos que totes les connexions del cablejat siguin segures i que compleixin amb els codis elèctrics locals i nacionals.
- Do not remove the insulator covering the terminals unless instructed for wiring.
3. Contingut del paquet
Verifiqueu que tots els components siguin presents abans de començar la instal·lació:
- Intermatic ET8215C Astronomic Electronic Time Switch Unit
- 2 piles AAA (preinstal·lades o incloses per separat)
- Manual d'instruccions (aquest document)
4. Configuració i instal·lació
4.1 Muntatge de la carcassa
The ET8215C is designed for NEMA 1 indoor applications. Choose a suitable location that is dry, protected from extreme temperatures, and allows for easy access for wiring and programming. Secure the steel enclosure to a flat, stable surface using appropriate mounting hardware (not included).

Figure 2: The Intermatic ET8215C with its steel enclosure cover closed.
4.2 Instruccions de cablejat
The ET8215C supports multi-volt operation (120-277 VAC) and can be configured for two independently operated SPST circuits, one simultaneous operated DPST, or independently pulsed SPST for contactor and bell ringing applications. Refer to the internal wiring diagram and the following guidelines:
- Desconnecteu l'alimentació: Ensure all power to the circuit is OFF at the main breaker before proceeding.
- Recinte obert: Open the front cover of the time switch to access the wiring terminals and internal components.
- Seleccioneu Voltage: Localitza el voltage selection switch inside the unit. Set it to the correct voltage (120V, 208V, 240V, or 277V) corresponding to your electrical supply.
- Connecteu el cablejat: Follow the wiring diagram printed inside the enclosure. The terminals are typically labeled for Timer Power (1, 2), Line 1 (3), Load 1 (4), Line 2 (5), and Load 2 (6).
- Connexions segures: Assegureu-vos que totes les connexions dels cables estiguin ajustades i segures.
- Tancament tancat: Once wiring is complete and verified, close the front cover securely.

Figura 3: Primer pla view of the internal voltage interruptor de selecció.

Figura 4: Intern view showing the wiring diagram, terminals, and display.
4.3 Initial Power-up and Battery Installation
The unit requires 2 AAA batteries for memory backup and initial setup. These are typically included. If not already installed, open the battery compartment and insert the batteries, observing correct polarity.

Figura 5: Primer pla view of the battery compartment and control buttons.
After wiring and battery installation, restore power to the circuit. The display should illuminate, and the unit will be ready for programming.
5. Instruccions de funcionament
The ET8215C is programmed using the buttons located below the display. The primary buttons are MODE, DIA, RESET, ENTER NEXT, +, -, i ON/OFF.
5.1 Configuració de la data i l'hora actuals
- Premeu el botó MODE button repeatedly until the clock icon appears on the display.
- Utilitza el + or - botons per ajustar l'hora i, a continuació, premeu ENTER NEXT.
- Repeat for minutes, AM/PM, year, month, and day.
- Premeu ENTER NEXT per guardar i sortir.
5.2 Programació d'esdeveniments ON/OFF
The time switch allows for up to 28 ON/OFF events. Each event can be programmed for specific days of the week or daily.
- Premeu el botó MODE button repeatedly until 'PROG' appears on the display.
- The display will show 'ON 1'. Use + or - to select the desired event number (1-28).
- Premeu ENTER NEXT. Ús DIA to select the day(s) for this event (e.g., MO, TU, WE, TH, FR, SA, SU, or ALL DAYS).
- Premeu ENTER NEXT. Ús + or - to set the ON time for the event.
- Premeu ENTER NEXT. The display will show 'OFF 1'. Use + or - to set the OFF time for the event.
- Premeu ENTER NEXT to save the event. Repeat for additional events.
5.3 Using the Astronomic Feature
The astronomic feature allows the time switch to automatically adjust ON/OFF times based on local sunrise and sunset. This eliminates the need for manual adjustments due to seasonal changes.
- Premeu el botó MODE button repeatedly until 'ASTRO' appears on the display.
- Ús + or - to set your geographical location (e.g., by entering your latitude/longitude or a pre-defined zone). Refer to the full manual for detailed location setup.
- When programming an event, you can select 'SUNRISE' or 'SUNSET' instead of a specific time for the ON or OFF event.
- You can also set an offset (e.g., 15 minutes before sunset) if desired.
5.4 Anulació manual
To manually turn the load ON or OFF, press the ON/OFF button. This will temporarily override the programmed schedule until the next scheduled event occurs.
6. Manteniment
The Intermatic ET8215C is designed for minimal maintenance. The primary maintenance task is battery replacement.
6.1 Substitució de la bateria
The unit uses 2 AAA alkaline batteries for memory backup. If the display becomes dim or the unit loses its programming during a power outage, the batteries may need replacement. It is recommended to replace batteries every 3-5 years, or as needed.
- Desconnecteu l'alimentació: For safety, turn off power to the time switch at the circuit breaker.
- Recinte obert: Open the front cover of the time switch.
- Traieu les piles velles: Locate the battery compartment and remove the old AAA batteries.
- Instal·leu piles noves: Introduïu dues piles alcalines AAA noves, assegurant-vos de la polaritat correcta (+/-).
- Tancament tancat: Tanqueu la coberta frontal de manera segura.
- Restaura l'alimentació: Torneu a encendre l'alimentació al disjuntor.
7. Solució De Problemes
This section addresses common issues you might encounter with your ET8215C time switch.
| Problema | Causa possible | Solució |
|---|---|---|
| La pantalla està en blanc o tènue. | No power to the unit or dead batteries. | Check circuit breaker. Ensure unit is wired correctly. Replace AAA batteries. |
| Unit does not switch loads ON/OFF at programmed times. | Incorrect programming, manual override active, or wiring issue. | Review programming steps carefully. Check if manual override is active. Verify load wiring connections. |
| Astronomic feature not working correctly. | Incorrect location setting. | Ensure the correct geographical location (latitude/longitude or zone) is entered in the astronomic settings. |
| Difficulty with initial programming. | Desconeixement de la seqüència de botons. | Carefully follow the programming steps in Section 5. Practice the sequence without connecting loads if necessary. |
| Wiring seems confusing. | Complex electrical setup or unclear diagram interpretation. | Consult a qualified electrician for assistance with wiring. Refer to the internal wiring diagram and ensure all connections match your specific application. |
If problems persist after attempting these solutions, contact Intermatic customer support.
8. Especificacions
| Número de model | ET8215C |
| Voltage | 120-277 VAC, 50 / 60 Hz |
| Circuits | 2-Circuit |
| AmpErage Rating | 30-Amp |
| Tipus de tancament | Tancament d'acer tipus 1 |
| Dimensions (A x A x P) | 7.75" x 5" x 3" |
| Material | Acer d'aliatge |
| Color | Gris |
| Tipus de bateria | 2 piles alcalines AAA (incloses) |
| Estil de commutació | SPST/DPST |
| Aprovacions | CSA (Canada and US) |
| UPC | 078275089761 |
9. Garantia i Suport
9.1 Informació de la garantia
This Intermatic ET8215C Astronomic Electronic Time Switch comes with a Garantia limitada d'1 any. The warranty covers replacement of the unit due to manufacturing defects. It does not cover labor costs associated with removal or reinstallation of the unit.
9.2 Atenció al client
For technical assistance, troubleshooting beyond this manual, or warranty claims, please contact Intermatic customer support directly. Refer to the official Intermatic weblloc web o l'embalatge del producte per obtenir la informació de contacte més actualitzada.
També podeu visitar el Botiga Intermatic a Amazon per obtenir més informació sobre el producte i recursos.





