DEWENWILS Photocell Transformer-300W
DEWENWILS 300W Low Voltage Landscape Transformer User Manual
Model: Photocell Transformer-300W
Introduction
Thank you for choosing the DEWENWILS 300W Low Voltage Landscape Transformer. This manual provides important information regarding the installation, operation, and maintenance of your transformer. Please read it thoroughly before use and retain it for future reference.
This transformer is designed to convert 120V AC household voltage to a safer 12V/14V AC, ideal for LED landscape lighting, spotlights, and pathway lights. It features a built-in photocell sensor and timer functions for automated operation.
Safety Information
Always follow basic safety precautions when installing and operating electrical equipment. Failure to do so may result in injury or property damage.
- Ensure the power is disconnected before installation or maintenance.
- This transformer is suitable for outdoor use only.
- Do not immerse the transformer in water.
- The total wattage of connected lights should not exceed 80% of the transformer's capacity (240W for this 300W model).
- Use only low voltage landscape lighting fixtures with this transformer.
- Consult a qualified electrician if you are unsure about any part of the installation.

Product Features
- Built-in Dusk to Dawn Sensor: Automatically turns landscape lighting on at dusk and off at dawn.
- Countdown Timer: Allows setting the transformer to turn off automatically 1-9 hours after dusk.
- Memory Function: Retains the selected mode even after a power outage (after running in the mode for at least 24 hours).
- Durable & Waterproof: Constructed from high-performance metal material for weather resistance and longevity.
- Overload/Short Circuit Protection: Features a circuit breaker for safety.
- Dual Voltage Output: Provides 12V AC and 14V AC options for lighting connections.

Installation
Mounting the Transformer
The transformer is designed for wall mounting. Use the built-in hanging holes to secure it to an outdoor wall or sturdy surface. Ensure the mounting location is protected from direct heavy rain and is easily accessible for operation.
- Choose a suitable outdoor location near a 120V AC power outlet.
- Mark the positions for the mounting screws using the transformer's hanging holes as a template.
- Drill pilot holes if necessary and secure the transformer firmly to the wall using appropriate screws (not included).

Wiring Landscape Lights
Connect your low voltage landscape lights to the transformer's output terminals. The transformer provides 12V AC and 14V AC output options. For shorter cable runs or fewer lights, 12V AC is typically sufficient. For longer runs or more lights, 14V AC can help compensate for voltage drop.
- Ensure the transformer is unplugged from the power outlet.
- Strip approximately 1/2 inch of insulation from the ends of your landscape lighting cables.
- Connect the wires to the desired 12V or 14V output terminals. Use the "COM" (common) terminal for the other wire.
- Tighten the screw connections securely to ensure good contact.
- Organize excess wires using the integrated cable clip to maintain a neat and tidy installation.
- Ensure the total wattage of all connected lights does not exceed 240W (80% of 300W).

Operating Instructions
The transformer features a simple control panel with a digital display and two buttons (▲ and ▼) for mode selection.
Mode Selection
Press the ▲ or ▼ buttons to cycle through the available operating modes:
- Always ON Mode: The lights will remain on continuously. The digital display will show "ON".
- Auto (Dusk to Dawn) Mode: The lights will automatically turn on at dusk and turn off at dawn. The digital display will show "AUTO". This mode utilizes the built-in photocell sensor.
- Countdown Timer Mode: The lights will turn on at dusk and automatically turn off after a set number of hours (1-9 hours). The digital display will show the selected hour (e.g., "5" for 5 hours). Press ▲ or ▼ to adjust the countdown duration.


Memory Function
Once a mode is selected and the transformer operates in that mode for at least 24 hours, the memory function will activate. This means the transformer will recall and resume the last selected mode even after a power interruption.
Maintenance
The DEWENWILS Low Voltage Landscape Transformer requires minimal maintenance. Regular checks can ensure optimal performance and longevity.
- Cleaning: Periodically wipe the exterior of the transformer with a soft, damp cloth to remove dirt and debris. Do not use abrasive cleaners or solvents.
- Photocell Sensor: Ensure the photocell sensor (located on the front panel) is clean and unobstructed by dirt, leaves, or other objects to ensure proper dusk-to-dawn operation.
- Connections: Annually inspect all wiring connections to ensure they are secure and free from corrosion.
- Circuit Breaker: If the circuit breaker trips (bounces out), disconnect the power, check for overloaded lights or short circuits in your landscape lighting system, resolve the issue, and then press the circuit breaker to reset it.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Lights do not turn on. |
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| Lights stay on continuously (in Auto or Timer mode). |
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| Lights flicker or are dim. |
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Specifications
| Feature | Specification |
|---|---|
| Brand | DEWENWILS |
| Model | Photocell Transformer-300W |
| Power Source | Corded Electric |
| Input Voltage | 120V AC |
| Output Voltage | 12V AC / 14V AC |
| Wattage | 300W |
| Current Rating | 25 Amps |
| Product Dimensions | 4"D x 6"W x 8.6"H |
| Mounting Type | Wall Mount |
| Material | High-performance metal |
| Certifications | ETL Listed |

Warranty and Support
DEWENWILS products are designed and manufactured to the highest quality standards. For warranty information, technical support, or customer service inquiries, please contact DEWENWILS directly through their official website or the retailer where the product was purchased.
Please have your model number (Photocell Transformer-300W) and purchase date ready when contacting support.
For more information, visit the DEWENWILS Store on Amazon.
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