1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of the Enerlites MWOS-W Motion Sensor Switch. This device integrates both Passive Infrared (PIR) and Ultrasonic sensing technologies to detect occupancy and control lighting automatically. Proper installation and configuration are essential for optimal performance.
2. Safety Information
WARNING: RISK OF ELECTRIC SHOCK. IMPROPER INSTALLATION CAN RESULT IN SERIOUS INJURY OR DEATH.
- Turn OFF power at the circuit breaker or fuse before installation.
- Installation must be performed by a qualified electrician or trained personnel.
- Ensure all wiring connections are secure and comply with local electrical codes.
- This device requires a neutral wire for operation.
- Do not use with loads exceeding the specified ratings.
3. Package Contents
- Enerlites MWOS-W Motion Sensor Switch
- Wire Nuts
- Wall Plate
- Instruction Manual
4. Product Features
- Dual Technology Sensing: Combines Passive Infrared (PIR) and Ultrasonic sensors for enhanced accuracy in detecting occupancy and fine motion.
- Reduced False Triggers: The dual technology minimizes instances of lights turning off while a room is still occupied.
- Customizable Settings: Adjustable time delay, detection range, and light level.
- Multiple Operating Modes: Supports Occupancy (Auto ON/Auto OFF) and Vacancy (Manual ON/Auto OFF) modes.
- Walk-Through Mode: Automatically turns lights off after 3 minutes if no activity is detected after 30 seconds following an occupancy detection.
- Daylight Harvesting: Integrated light level sensor keeps the load OFF if sufficient natural light is present.
- Coverage: Up to 1200 sq. ft. for major movement (PIR) and 400 sq. ft. for minor movement (Ultrasonic).
Image: Overview of the MWOS-W sensor's key features, including dual technology detection, occupancy/vacancy modes, working modes, and adjustable sensitivity/time delay options.
5. Installation
5.1 Wiring Diagram
The MWOS-W requires a neutral wire for proper operation. Ensure the circuit breaker is OFF before proceeding with wiring.
Image: Wiring diagram showing the required neutral wire connection (black, red, green, white wires) and an illustration of the PIR and Ultrasonic detection ranges. Installation height is recommended between 4-5 feet.
5.2 Installation Steps
- Turn Off Power: Locate the circuit breaker controlling the switch location and turn it OFF. Verify power is off using a voltage tester.
- Remove Existing Switch: Carefully remove the existing wall plate and switch from the electrical box.
- Identify Wires: Identify the Line (hot), Load, Neutral, and Ground wires. The MWOS-W requires a neutral wire.
- Wire Connections: Connect the wires from the MWOS-W to the corresponding wires in the electrical box using wire nuts:
- Black wire (MWOS-W) to Line (hot) wire.
- Red wire (MWOS-W) to Load wire.
- White wire (MWOS-W) to Neutral wire.
- Green wire (MWOS-W) to Ground wire.
- Mount Switch: Carefully fold the wires and insert the switch into the electrical box. Secure it with the provided screws.
- Install Wall Plate: Attach the decorative wall plate.
- Restore Power: Turn the power back ON at the circuit breaker.
6. Operation and Settings
The MWOS-W features adjustable settings to customize its performance. These settings are accessed by removing the movable face cover on the front of the switch.
Image: Close-up view of the MWOS-W sensor switch with its movable face cover removed, revealing the Fresnel lens, indicator lights, mode selection/time delay DIP switches, ultrasonic setting, light setting, and Off/Occupancy/Vacancy mode switch.
6.1 Mode Selection / Time Delay (DIP Switches)
The DIP switches allow configuration of the time delay and trigger modes. Refer to the diagram on the device for specific switch positions and their corresponding settings.
- Time Delay: Options include 5-second test, 30 seconds, 5, 10, 15, 20, 25, and 30 minutes.
- Trigger Modes: Set the triggering condition among:
- Either PIR or Ultrasonic sensor detects motion.
- Only PIR sensor detects motion.
- Only Ultrasonic sensor detects motion.
- Both PIR and Ultrasonic sensors detect motion.
6.2 Occupancy/Vacancy Mode Switch
This switch determines how the light turns ON:
- OCC (Occupancy): Lights turn ON automatically when motion is detected and turn OFF automatically after the set time delay when no motion is detected.
- VAC (Vacancy): Lights must be turned ON manually (by pressing the button) but will turn OFF automatically after the set time delay when no motion is detected.
- OFF: Keeps the load off regardless of motion.
6.3 Ultrasonic Setting
Adjusts the sensitivity of the ultrasonic sensor. Higher sensitivity detects finer movements but may also increase false triggers in certain environments.
6.4 Light Setting (Daylight Harvesting)
This setting determines the ambient light level at which the sensor will keep the lights OFF, even if motion is detected. This feature saves energy by preventing lights from turning on when natural light is sufficient. There are 4 adjustable daylight saving levels.
6.5 Walk-Through Mode
This mode can be enabled or disabled via DIP switch settings. When enabled, if no activity is detected after 30 seconds following an initial occupancy detection, the lights will automatically turn off after only 3 minutes, overriding the main time delay setting.
7. Detection Coverage
The MWOS-W provides comprehensive coverage due to its dual technology:
- PIR (Passive Infrared): Detects major movements up to 40 feet in front and 20 feet on the sides, covering approximately 1200 sq. ft.
- Ultrasonic: Detects minor movements up to 40 feet in front and 20 feet on the sides, covering approximately 400 sq. ft. This is particularly useful for detecting subtle motions like typing or reading.
Image: Illustration of PIR motion sensor coverage, indicating its effectiveness for detecting movement in larger areas like an office reception desk.
Image: Depiction of ultrasonic sensors at work, showing how they reduce false triggers while accurately sensing motion, even subtle movements in an office setting.
8. Maintenance
The Enerlites MWOS-W Motion Sensor Switch requires minimal maintenance.
- Cleaning: To clean the surface of the switch, use a soft, damp cloth. Do not use abrasive cleaners or solvents, as these can damage the finish or internal components.
- Sensor Obstruction: Ensure the sensor lens is not obstructed by furniture, decorations, or dust, as this can impair detection performance.
9. Troubleshooting
If the sensor switch is not functioning as expected, refer to the following common issues and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Lights do not turn ON automatically. |
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| Lights turn OFF while room is occupied. |
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| Lights turn ON unexpectedly. |
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| No power to the switch. |
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10. Specifications
- Model Number: MWOS-W
- Voltage: 120/277VAC
- Incandescent Load: 800W
- Technology: Passive Infrared (PIR) and Ultrasonic
- Mounting Type: Embedded (Wall)
- Color: White
- Neutral Wire: Required
- Coverage: Major movement up to 1200 sq. ft., Minor movement up to 400 sq. ft.
- Time Delay Settings: 5-sec test, 30 seconds, 5, 10, 15, 20, 25, 30 minutes
- Operating Modes: Occupancy (Auto ON/Auto OFF), Vacancy (Manual ON/Auto OFF)
- Certifications: UL Listed
- Package Dimensions: 5 x 2 x 2 inches
- Item Weight: 0.81 ounces
11. Warranty and Support
ENERLITES products are designed for quality and reliability. For warranty information or technical support, please refer to the contact details provided with your purchase or visit the official ENERLITES website. Keep your purchase receipt for warranty claims.
