Introduction
This manual provides comprehensive instructions for the installation, programming, and operation of your Intermatic DT300CH Digital Timer. Please read this manual thoroughly before using the device to ensure proper function and safety.
Product Overview
The Intermatic DT300CH is a digital timer designed to automatically control the ON and OFF cycles of connected electrical devices. It features a manual override switch for immediate control and supports up to 20 ON/OFF settings with daily or weekly programming options. This timer is rated for 5A/500W tungsten/120V, 60 Hz applications.
This image displays the front of the Intermatic DT300CH Digital Timer, showing its circular design, digital display, and control buttons labeled 'MINUTE', 'HOUR', 'PROGRAM', 'ON/AUTO/OFF', 'CLOCK', and 'R'.
Setup
1. Initial Power-Up
- Plug the Intermatic DT300CH Digital Timer into a standard 120V AC wall outlet.
- The digital display should illuminate. If the display is blank, ensure the timer is securely plugged in.
2. Setting Current Time
- Press and hold the CLOCK button.
- While holding CLOCK, press the HOUR button to adjust the current hour.
- Continue holding CLOCK and press the MINUTE button to adjust the current minute.
- Release the CLOCK button once the correct time is set.
- To set the day of the week, press and hold the CLOCK button, then press the DAYS button to cycle through the days until the correct day is displayed.
Operating Instructions
1. Programming ON/OFF Times
- Press the PROGRAM button to enter programming mode. The display will show "1 ON".
- Use the HOUR and MINUTE buttons to set the desired ON time for program 1.
- Press the DAYS button to select the days of the week for this program (e.g., everyday, weekdays, weekends, specific days).
- Press PROGRAM again. The display will show "1 OFF".
- Use the HOUR and MINUTE buttons to set the desired OFF time for program 1.
- Repeat steps 3-5 for up to 20 ON/OFF programs.
- After setting all desired programs, press the CLOCK button to exit programming mode and return to the current time display.
2. Manual Override
To manually turn the connected device ON or OFF, press the ON/AUTO/OFF button. Each press will cycle through ON, AUTO, and OFF modes. In AUTO mode, the timer will follow the programmed schedule.
3. Resetting the Timer
To clear all settings and reset the timer to its factory defaults, use a pointed object (like a pen tip) to press the recessed R (Reset) button. This will erase all programmed times and the current time setting, requiring you to re-enter them.
Maintenance
- Keep the timer clean by wiping it with a dry, soft cloth. Do not use liquid cleaners or abrasive materials.
- Ensure the timer is not exposed to extreme temperatures, direct sunlight, or moisture.
- Do not attempt to open or repair the timer yourself. Refer to qualified service personnel for any repairs.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank. | No power or timer is not properly plugged in. | Ensure the timer is securely plugged into a live 120V AC outlet. Check the outlet with another device. |
| Timer does not turn ON/OFF at programmed times. | Timer is not in AUTO mode. Incorrect program settings. | Press ON/AUTO/OFF until "AUTO" is displayed. Review and correct program settings. Ensure current time and day are set correctly. |
| Timer loses settings after power outage. | Internal battery (if present) is depleted or not functioning. | This model may not have a battery backup or its internal rechargeable battery may have reached end-of-life. Re-enter settings. Consider replacing the unit if this is a persistent issue and a battery backup is expected. |
| Buttons are unresponsive. | Timer may be in an unresponsive state. | Press the recessed R (Reset) button using a pointed object. This will clear all settings. |
Specifications
- Brand: Intermatic
- Model: DT300CH
- Part Number: DT300CH
- Power Rating: 5A/500W Tungsten/120V, 60 Hz
- Number of Settings: Up to 20 ON/OFF programs
- Material: Plastic
- Color: White
- Item Weight: 4 ounces
- Package Dimensions: 6.1 x 3.5 x 2.4 inches
- UPC: 078275111288
Warranty and Support
Specific warranty information for the Intermatic DT300CH Digital Timer is not provided in this document. For detailed warranty terms, technical support, or service inquiries, please refer to the official Intermatic website or contact their customer service department.
You can visit the official Intermatic store for more information: Intermatic Store
