Introduction
The Intermatic SS7C Digital 7-Day Programmable Wall Switch Timer is designed to control lighting and heavy-duty loads such as fans and appliances. This timer offers precise control with up to six ON/OFF settings per day, totaling 42 settings per week. It features a digital clock, battery backup, and various programming options to suit your schedule.
Safety Information
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. If you are unsure about any part of these instructions, consult a qualified electrician. Do not exceed the electrical ratings of the device.
- Ensure power is disconnected before installation.
- Follow all local and national electrical codes.
- This device is for indoor use only.
Package Contents
Verify that all components are present before beginning installation:
- Intermatic SS7C Digital Wall Switch Timer Unit
- Mounting Screws
- Wire Nuts
- Instruction Manual (this document)
Setup and Installation
Tools Required: Screwdriver, Wire Strippers, Electrical Tape.
- Turn Off Power: Locate the circuit breaker or fuse that controls the power to the switch you are replacing. Turn it OFF. Verify power is off using a voltage tester.
- Remove Existing Switch: Carefully remove the wall plate and unscrew the existing switch from the wall box. Disconnect the wires from the old switch. Note the wiring configuration (e.g., line, load, ground).
- Wire the SS7C Timer: Connect the wires from the wall box to the SS7C timer using the provided wire nuts. Refer to the wiring diagram below for typical connections. Ensure all connections are secure.

Image: Front view of the Intermatic SS7C Digital Wall Switch Timer. This image shows the digital display and control buttons, which are essential for programming and operation.
- Line Wire: Connect to the timer's LINE terminal.
- Load Wire: Connect to the timer's LOAD terminal.
- Ground Wire: Connect to the timer's GROUND terminal.
- Neutral Wire (if applicable): Some installations may require a neutral wire. Consult your local electrical codes.
- Mount the Timer: Gently push the wired timer into the wall box. Secure it with the mounting screws. Attach the wall plate.
- Restore Power: Turn the power back ON at the circuit breaker or fuse box. The timer display should illuminate.
Operating and Programming
The SS7C timer allows for flexible programming with up to 6 ON/OFF settings per day.
1. Setting Current Time and Day
- Press the CLOCK button. The time display will flash.
- Use the HOUR and MINUTE buttons to adjust the current time.
- Press the DAY button to set the current day of the week.
- Press CLOCK again to save and exit, or wait a few seconds for it to save automatically.
2. Programming ON/OFF Events
The timer supports up to 6 ON/OFF programs per day, for a total of 42 per week.
- Press the PROG button. The display will show "1 ON".
- Use HOUR, MINUTE, and DAY buttons to set the desired ON time and day(s) for Program 1. You can select specific days (e.g., M, Tu, W, Th, F, Sa, Su), weekdays (M-F), weekends (Sa-Su), or all 7 days.
- Press PROG again. The display will show "1 OFF".
- Set the desired OFF time and day(s) for Program 1 using the HOUR, MINUTE, and DAY buttons.
- Repeat steps 1-4 for additional programs (2 ON/OFF through 6 ON/OFF).
- After setting all desired programs, press CLOCK to return to normal operation.
3. Manual Override
To manually turn the connected device ON or OFF outside of programmed times, press the ON/OFF button. This will temporarily override the current program until the next scheduled ON or OFF event.
4. Random Setting Feature
The random setting feature can be activated to vary ON/OFF times slightly, creating a lived-in appearance when you are away. Consult the full manual for specific activation steps for the random feature.
Maintenance
The Intermatic SS7C timer is designed for low maintenance. The internal battery backup maintains programming for up to three years, even during power failures.
- Battery Replacement: If the display becomes dim or programming is lost frequently during power outages, the internal battery may need replacement. This typically requires professional servicing or careful adherence to specific instructions not detailed here.
- Cleaning: Clean the timer's surface with a soft, damp cloth. Do not use abrasive cleaners or solvents.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Timer does not turn ON/OFF at programmed times. | Incorrect programming; Manual override active; Power interruption. | Review programming steps. Ensure manual override is not active. Check power supply. |
| Display is blank or dim. | No power to the unit; Internal battery low. | Check circuit breaker. If power is present, the internal battery may need replacement. |
| Programming is lost after power outage. | Internal battery is depleted or faulty. | The internal battery needs replacement. Contact support if within warranty. |
| Connected device does not respond. | Incorrect wiring; Faulty device; Overload. | Verify wiring connections. Test the connected device independently. Ensure load does not exceed timer's rating. |
Specifications
- Brand: Intermatic
- Model Number: SS7C
- Item Weight: 0.35 Pounds
- Number of Settings: 7-day programmable, up to 6 ON/OFF settings per day (42 per week)
- Screen Size: 1.5 Inches
- Color: White
- Manufacturer: INTERMATIC INC
- UPC: 078275056732
- ASIN: B0000BYDA2
Warranty and Support
This Intermatic SS7C Digital 7-Day Programmable Wall Switch Timer comes with a 1-year limited manufacturer's warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use.
For warranty claims, technical assistance, or further support, please contact Intermatic customer service. Keep your proof of purchase for warranty validation.
For the most up-to-date support information, please visit the official Intermatic website or refer to the contact details provided with your product packaging.