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Highlights trip relay indication, high/low level LEDs, compact design, adjustable sensitivity, and pump protection.
Details model, power supply, input sensor types, indications, sensitivity range, reset, and trip delay.
Emphasizes adherence to all safety codes, symbols, and instructions for safe operation and instrument protection.
Provides guidance on connections, handling, installation location, sensor probe placement, and sensitivity adjustment.
Explains operating modes (Suction/Delivery logic) and how sensor probes function in different water level conditions.
Illustrates wiring for suction/delivery logic and provides a testing chart and timing diagram for single-level control.
Shows wiring for suction/delivery logic and includes a testing chart and timing diagram for two-level control.
Presents a wiring diagram and testing chart for controlling both suction and delivery tanks simultaneously.
Highlights trip relay indication, high/low level LEDs, compact design, adjustable sensitivity, and pump protection.
Details model, power supply, input sensor types, indications, sensitivity range, reset, and trip delay.
Emphasizes adherence to all safety codes, symbols, and instructions for safe operation and instrument protection.
Provides guidance on connections, handling, installation location, sensor probe placement, and sensitivity adjustment.
Explains operating modes (Suction/Delivery logic) and how sensor probes function in different water level conditions.
Illustrates wiring for suction/delivery logic and provides a testing chart and timing diagram for single-level control.
Shows wiring for suction/delivery logic and includes a testing chart and timing diagram for two-level control.
Presents a wiring diagram and testing chart for controlling both suction and delivery tanks simultaneously.
The Multispan WLC 22 is a water level controller designed for efficient and reliable management of liquid levels in various applications. This device offers a comprehensive solution for monitoring and controlling water pumps, ensuring optimal operation and preventing common issues such as dry running or overflow. Its compact and sleek design makes it suitable for integration into diverse systems, while its robust features cater to both simple and complex water management needs.
The primary function of the WLC 22 is to monitor and control water levels using a set of three sensor prods: S1 (Common), S2 (Low), and S3 (High). These prods are strategically placed within a tank to detect the presence or absence of water at different levels. Based on the signals from these sensors, the controller activates or deactivates a connected pump motor via its output relay. The device is capable of operating in two distinct logic modes: SUCTION logic and DELIVERY logic, offering flexibility to suit different pumping requirements.
In SUCTION logic, the WLC 22 is typically used for applications where water is being drawn from a source tank, such as filling an overhead tank. When operating in this mode, the pump motor will automatically start when the water level in the tank drops below a predefined low level (e.g., when prods S2 and S3 are out of water, and S1 is under water). Conversely, the pump will stop when the tank is full (i.e., when all three prods S1, S2, and S3 are under water). This ensures that the pump only runs when necessary to replenish the water supply, preventing the tank from running dry.
For DELIVERY logic, the WLC 22 is designed for scenarios where water is being pumped out of a tank, such as draining a sump or maintaining a minimum level. In this mode, the pump motor will start when the water level in the tank reaches a high point (e.g., when prods S1, S2, and S3 are under water). The pump will then continue to run until the water level drops to a low point (e.g., when prods S2 and S3 are out of water, and S1 is under water), at which point it will stop. This logic is ideal for preventing overflows or for emptying tanks when they reach a certain capacity.
The controller features a sensitivity adjustment mechanism, allowing users to fine-tune its response based on the conductivity of the water. This is crucial because water conductivity can vary significantly depending on its source and dissolved mineral content. By adjusting the sensitivity, the WLC 22 can accurately detect water levels even in challenging environments, ensuring reliable operation.
A key protective feature of the WLC 22 is its ability to safeguard the pump from dry running and overflow conditions. In SUCTION logic, it prevents the pump from running when there's no water to draw, thus protecting the pump from damage. In DELIVERY logic, it prevents the tank from overflowing by stopping the pump once the desired high level is reached. This dual protection mechanism enhances the longevity of the pump and maintains the integrity of the water system.
The device also incorporates a trip relay indication, which provides a visual cue when the relay is activated, indicating the operational status of the pump. This, along with high and low-level indication LEDs, offers clear and immediate feedback on the water levels and the controller's state.
The WLC 22 is designed for ease of use and integration, offering several features that simplify its operation and maintenance.
Flexible Logic Selection: The ability to choose between SUCTION and DELIVERY logic makes the WLC 22 highly versatile. Users can easily configure the device to suit specific application requirements, whether it's filling a tank from a source or draining a tank to a lower level. This flexibility is achieved by connecting the output relay contacts (15 & 18 for COM-NO, or 15 & 16 for COM-NC) according to the desired logic.
Adjustable Sensitivity: The front-mounted potentiometer allows for precise adjustment of the sensor sensitivity. This feature is critical for ensuring accurate water level detection across different water types and conductivities. The adjustment procedure involves immersing all prods in water, setting the pot to maximum to turn the relay ON, then turning it towards the minimum until the relay turns OFF, and finally adjusting it slightly above this point to ensure stable ON operation without chattering. Once set, it is recommended not to disturb this setting.
Clear Visual Indications: The controller is equipped with multiple LED indicators that provide real-time status updates. These include:
Compact and Sleek Design: The WLC 22's compact form factor (90 x 22.5 x 67.5 mm) and Din Rail mounting capability make it easy to install in control panels and electrical enclosures, optimizing space utilization. Its sleek design also contributes to a neat and organized installation.
Automatic Reset and Trip Delay: The device features an auto-reset function, ensuring that it automatically returns to its normal operating state after a control action. A built-in trip delay of approximately 0.5 seconds helps prevent false triggers due to minor water fluctuations, ensuring stable and reliable control.
Pump Protection: The integrated pump protection features, including dry run and overflow prevention, are crucial for extending the lifespan of the pump and maintaining system efficiency. By preventing the pump from operating under adverse conditions, the WLC 22 reduces wear and tear, minimizes energy consumption, and prevents potential damage.
While the WLC 22 is designed for reliable operation with minimal intervention, certain aspects contribute to its ease of maintenance and long-term performance.
Robust Construction: The device is built to withstand typical industrial and domestic environments. Its robust construction ensures durability and reduces the likelihood of premature failure, contributing to lower maintenance requirements.
Easy Terminal Access: The terminal connections are clearly labeled and easily accessible, simplifying installation and any future troubleshooting or wiring modifications. This design consideration reduces the time and effort required for maintenance tasks.
Simple Sensitivity Adjustment: The external potentiometer for sensitivity adjustment allows for easy recalibration if environmental conditions (e.g., water conductivity) change significantly over time. This ensures that the controller continues to operate accurately without requiring complex internal adjustments.
Clear Troubleshooting Indicators: The multiple LED indicators serve as valuable diagnostic tools. By observing the status of the Relay, High Level, Low Level, and Mains LEDs, technicians can quickly identify the operational state of the device and pinpoint potential issues, facilitating faster troubleshooting and repair.
Safety Precautions: The manual emphasizes several safety precautions, which, when followed, contribute to the longevity and safe operation of the device. These include ensuring proper connections, handling by authorized personnel, avoiding installation near heat sources, and correctly mounting the sensor prods. Adhering to these guidelines helps prevent damage to the unit and ensures safe operation, thereby reducing the need for unexpected maintenance.
Sensor Prod Management: The instructions regarding the placement and type of sensor prods (PVC conduit piping, no metal pipes, not wall-mounted on metallic tanks) are crucial for optimal performance and longevity of the sensors. Proper installation and periodic inspection of the prods for corrosion or damage will ensure accurate readings and prevent operational issues, minimizing maintenance related to sensor failure.
In summary, the Multispan WLC 22 is a versatile and reliable water level controller that offers comprehensive features for managing water levels and protecting pumps. Its user-friendly design, flexible operating modes, and robust safety features make it an excellent choice for a wide range of water management applications, ensuring efficient and trouble-free operation with minimal maintenance.
General| Product Type | Wireless LAN Controller |
|---|---|
| Maximum APs Supported | 22 |
| VLAN Support | Yes |
| Security | WPA, WPA2, 802.1X |
| Weight | 0.8 kg |
| Wireless Standard | IEEE 802.11a/b/g/n |
| Interface | Gigabit Ethernet |
