Watt Stopper DT-300 Dual Technology Ceiling Occupancy Sensor Instruction Manual

1. Introduction

1.1 Product Overview

The Watt Stopper DT-300 is a dual technology ceiling occupancy sensor designed to automatically control lighting based on occupancy detection. It integrates both Passive Infrared (PIR) and Ultrasonic technologies to provide comprehensive coverage and reliable performance. This sensor is suitable for various commercial and institutional applications, ensuring energy savings by turning lights off when spaces are unoccupied.

Figure 1: Watt Stopper DT-300 Ceiling Occupancy Sensor, front view.

1.2 Key Features

• Dual Technology: Combines PIR and Ultrasonic for enhanced detection accuracy.
• 360-Degree Coverage: Provides wide area detection from a ceiling mount.
• Low Profile Design: Architecturally appealing and unobtrusive appearance.
• SmartSet Technology: Automatically selects optimal settings for various spaces.
• Manual-On Capability: Accepts low voltage switch input for manual activation.
• Depluggable Terminal Wiring: Facilitates quick and easy installation.
• Walk-Through Mode: Increases energy savings potential.
• Isolated Relay: Allows interface with Building Control Systems (BAS) and HVAC systems.
• Certifications: UL and cUL listed for safety and performance.

2. Installation and Setup

2.1 Components

The DT-300 sensor typically consists of the sensor head and a power pack (e.g., BZ-50). Ensure all components are present before beginning installation.

Figure 2: DT-300 Sensor (left) and BZ-50 Power Pack (right).

Figure 3: Rear view of the DT-300 sensor showing the depluggable terminal block, alongside the BZ-50 power pack.

2.2 Wiring Diagram

Proper wiring is crucial for the sensor's functionality. Refer to the diagram below for connecting the DT-300 sensor to its power pack and the lighting load. Always ensure power is disconnected before performing any wiring.

Figure 4: Detailed wiring diagram for the BZ-50 Power Pack, illustrating connections to the DT-300 sensor, lighting load, and power source.

2.3 Mounting Instructions

1. Select Location: Choose a central ceiling location within the desired coverage area (up to 1000 sq ft). Avoid placing near HVAC vents or direct sunlight, which can affect sensor performance.
2. Prepare Opening: Create an appropriate opening in the ceiling for the sensor and power pack.
3. Connect Wiring: Follow the wiring diagram (Figure 4) to connect the sensor to the power pack and the power pack to the building's electrical system and lighting load.
4. Mount Sensor: Secure the DT-300 sensor into the ceiling opening.
5. Mount Power Pack: Secure the power pack in an accessible location, typically above the ceiling or in a junction box.
6. Restore Power: Once all connections are secure and verified, restore power to the circuit.

3. Operation

3.1 Dual Technology Detection

The DT-300 sensor utilizes both PIR and Ultrasonic technologies. Lighting will turn on when both technologies detect occupancy. Once the lights are on, detection by either technology is sufficient to keep the lights on. This dual detection method helps minimize false triggers and ensures reliable occupancy sensing.

3.2 Manual-On Operation

The sensor supports manual-on operation via a low voltage switch. If a switch is connected, users can manually turn on the lights. The sensor will then maintain the lights based on occupancy detection, turning them off after the set time delay when no occupancy is detected.

3.3 Time Delay and Walk-Through Mode

The sensor features an adjustable time delay, which determines how long the lights remain on after the last detected occupancy. The Walk-Through Mode is an energy-saving feature that reduces the time delay if a person quickly enters and exits the space, preventing the lights from staying on unnecessarily.

4. Maintenance

4.1 Cleaning

To ensure optimal performance, periodically clean the sensor lens and housing with a soft, dry cloth. Avoid using abrasive cleaners or solvents, as these can damage the sensor's components.

4.2 Sensor Checks

Regularly verify the sensor's detection capabilities by walking through the coverage area. If the sensor is not responding as expected, refer to the troubleshooting section. No specific calibration is typically required for this model under normal operating conditions.

5. Troubleshooting

5.1 Common Issues and Solutions

6. Technical Specifications

6.1 General Specifications

• Model: DT-300
• Brand: Watt Stopper
• Technology: Dual (Passive Infrared & Ultrasonic)
• Mounting Type: Ceiling Mount
• Coverage Area: Up to 1000 sq ft (360 degrees)
• Power Source: Corded Electric (requires compatible power pack)
• Color: White
• Product Dimensions: 4.5"D x 4.5"W x 1.02"H (114.3mm diameter x 25.9mm deep)
• Item Weight: 6.4 ounces
• Certifications: UL, cUL Listed
• Compatible Devices: Lighting Controls, Building Automation Systems (BAS), HVAC Systems
• UPC: 754182913824

6.2 Environmental

• Operating Temperature: 32 Degrees Fahrenheit (Note: This value typically represents a minimum; refer to full product datasheet for complete range.)

7. Warranty and Customer Support

7.1 Warranty Information

The Watt Stopper DT-300 Ceiling Occupancy Sensor comes with a Five-Year Limited Warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. For specific terms and conditions, please refer to the official warranty documentation provided with your product or visit the manufacturer's website.

7.2 Contact Information

For technical assistance, warranty claims, or further product information, please contact Watt Stopper customer support:

• Website: www.wattstopper.com
• Phone: 800-879-8585