Introduction
This manual provides detailed instructions for the safe and efficient operation of your DEWENWILS TU-19 24-Hour Mechanical Plug-in Timer. This device is designed to automate the on/off cycles of indoor electrical appliances, offering convenience and energy savings. Please read this manual thoroughly before use and retain it for future reference.
Safety Information
- For indoor use only. Do not expose to water or damp conditions.
- Do not exceed the electrical ratings: 125VAC, 60Hz, 15A General, 10A/1250W Tungsten, 15A Resistive, 3/4HP.
- Ensure the timer is securely plugged into a grounded outlet.
- Do not use with appliances that could cause a hazardous condition if left unattended (e.g., heating appliances).
- Keep out of reach of children.
- Do not disassemble or modify the timer.
Product Overview
The DEWENWILS TU-19 mechanical timer features a simple dial-based programming system with dual 3-prong outlets. It is designed for ease of use and reliability.

Figure 1: Front view of the DEWENWILS TU-19 Mechanical Timer, showing the central dial and one of the side outlets.
Key Components:
- 24-Hour Dial: Displays time and allows for setting ON/OFF intervals.
- Push Pins: Each pin represents a 30-minute interval. Pushed down = ON, Pulled up = OFF.
- Current Time Arrow: Indicates the current time on the dial.
- Mode Switch: Allows selection between "Timer ON" and "Always ON" (Outlet ON).
- Dual 3-Prong Outlets: For connecting two devices simultaneously.

Figure 2: Labeled diagram of the DEWENWILS TU-19 Mechanical Timer, highlighting the programmable daily cycle dial, convenient side switch, and 2-grounded outlets.
Setup and Programming
Follow these steps to set up and program your DEWENWILS TU-19 timer:
- Set Current Time: Rotate the entire dial clockwise until the "Current Time" arrow aligns with the current time of day. The dial is marked with AM/PM hours.
- Program ON/OFF Times:
- Each segment (pin) on the dial represents 30 minutes.
- To set a period for the device to be ON, push the corresponding pins DOWN towards the center of the dial.
- To set a period for the device to be OFF, leave the corresponding pins UP (pulled away from the center).

Figure 3: Visual guide for setting the timer: 1) Rotate dial to current time, 2) Push pins down for ON times, 3) Set master switch to TIMER ON.
- Select Operating Mode: Use the slide switch on the side of the timer to select the desired mode:
- Timer ON (Clock Icon): The timer will operate according to your programmed ON/OFF pins.
- Always ON (Outlet ON Icon): The connected devices will remain continuously on, bypassing the timer settings.
- Plug into Wall Outlet: Insert the timer into a standard 3-prong 125V AC wall outlet.
- Connect Appliances: Plug your appliances into the dual 3-prong outlets on the sides of the timer. Ensure appliances are working correctly before relying on the timer.

Figure 4: Detailed view of the timer dial, illustrating how pins pushed down activate the device (ON) and pins pulled up deactivate it (OFF). Each pin represents a 30-minute interval.
Operating the Timer
Once set up, the timer will automatically turn your connected devices ON and OFF according to your programmed schedule. The dial will continuously rotate, and when the current time aligns with a pushed-down pin, the device will turn ON. When it aligns with a pulled-up pin, the device will turn OFF.

Figure 5: The timer plugged into a wall outlet, controlling a lamp. This demonstrates the daily repeat function, managing lights to reduce energy waste.
Typical Applications:
- Indoor lighting (lamps, room lights)
- Holiday decorations (Christmas lights)
- Plant grow lights
- Coffee makers
- Small electronics and appliances

Figure 6: A collage illustrating various appliances compatible with the DEWENWILS TU-19 timer, including lamps, fans, grow lights, Christmas lights, and coffee makers.
Maintenance
The DEWENWILS TU-19 Mechanical Timer requires minimal maintenance. To ensure optimal performance and longevity:
- Keep the timer clean and free from dust and debris. Use a soft, dry cloth for cleaning.
- Avoid exposing the timer to extreme temperatures or humidity.
- Regularly check the pins to ensure they are set correctly for your desired schedule.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not turn ON/OFF at programmed times. |
|
|
| Device is always ON or always OFF. |
|
|
| Timer dial is not rotating. | Timer is not receiving power. |
|
Specifications
- Model: TU-19
- Electrical Rating: 125VAC, 60Hz
- Max. Load: 15A General Purpose, 10A/1250W Tungsten, 15A Resistive, 3/4HP
- Intervals: 30-minute increments
- Daily Cycles: 24-hour repeating cycle
- Outlets: Dual 3-prong grounded outlets
- Certifications: ETL Listed
- Dimensions: 2.3 x 2.3 x 2.3 inches
- Item Weight: 5.3 ounces
- Material: Plastic
Warranty and Support
For warranty information or technical support, please refer to the product packaging or contact DEWENWILS customer service directly. Contact details are typically available on the manufacturer's website or included in the product documentation.





