Automatic Water Level Controller Switch

Introduction

The EARU DF-96DK Automatic Water Level Controller Switch is designed to manage water levels in tanks, pools, or water towers. It utilizes an integrated circuit to provide automatic control for water filling, drainage, and water shortage protection, preventing overflow or pump damage due to dry running. This versatile device is suitable for industrial and household applications.

Product Features

• Multiple Control Modes: Supports single-control for water filling (UP pool), single-control for drainage (DOWN pool), and combined control of upper and lower pools.
• Water Shortage Protection: Protects water pumps from dry burning by automatically stopping operation when water levels are critically low.
• Automatic Operation: Automatically starts or stops the pump based on detected water levels.
• Integrated Circuit Design: Ensures reliable and efficient performance.

Specifications

Probe Details: The probes feature a 304 stainless steel head, plastic shell, and antioxidant wire, available in various lengths (2M, 5M, 10M, 15M, 20M, 30M).

Water level probes with stainless steel heads and insulated wires.

Setup & Installation

The DF-96DK controller is designed for Din Rail mounting. Proper wiring and probe placement are crucial for correct operation. Always ensure power is disconnected before installation.

General Wiring Overview

The controller has terminals for power input (HR-POWER IN, HG-POWER ON), probe connections (A, B, C, D, E), and pump output. The main switch on the front panel allows selection between ON, OFF, and AUTO modes.

DF-96DK controller with labeled terminals and switch.

Probe Connection Details

The probes (A, B, C, D, E) are used to detect water levels. Probe C (black wire) should always be placed at the bottom of the pool or tank as the common line.

Installation Modes:

1. Single-Control UP Pool (Water Storage)

This mode is used to automatically fill a tank when the water level drops below a certain point and stop filling when it reaches the desired upper level.

1. Connect the red wire to probe A (Upper water level control point).
2. Connect the blue wire to probe B (Lower water level control point).
3. Connect the black wire to probe C (Common line, bottom of the pool).
4. Connect the green and yellow wires to probe C (short-connected to common line).

Operation: When the water level drops below point B, the controller starts the pump. When the water level reaches point A, the controller stops the pump.

Wiring for single-control UP pool (water storage).

2. Single-Control DOWN Pool (Drain Water)

This mode is used to automatically drain a tank when the water level rises above a certain point and stop draining when it reaches the desired lower level.

1. Connect the yellow wire to probe E (Upper water level control point).
2. Connect the green wire to probe D (Lower water level control point).
3. Connect the black wire to probe C (Common line, bottom of the pool).
4. Probes A (red) and B (blue) should be disconnected.

Operation: When the water level reaches point E, the controller starts the pump to drain. When the water level drops below point D, the controller stops the pump.

Wiring for single-control DOWN pool (drain water).

3. Joint Control UP and DOWN Pool

This mode allows simultaneous control of water levels in two separate pools or tanks, typically for transferring water between them.

1. Connect the red wire to probe A (Upper water level control point in UP pool).
2. Connect the blue wire to probe B (Lower water level control point in UP pool).
3. Connect the black wire to probe C (Common line for both pools).
4. Connect the green wire to probe D (Lower water level control point in DOWN pool).
5. Connect the yellow wire to probe E (Upper water level control point in DOWN pool).

Operation: When the UP pool water level drops below B, the pump starts. When the UP pool water level reaches A, the pump stops. Simultaneously, if the DOWN pool water level reaches E, the pump starts. If the DOWN pool water level drops below D, the pump stops.

Wiring for joint control of UP and DOWN pools.

4. Lack of Water Protection

This mode provides protection against dry running for your pump.

1. Connect the black wire to probe C (Common line).
2. Connect the green wire to probe D (Lower water level control point).
3. Probes E (yellow) and C (black) should be short-connected.
4. Probes A (red) and B (blue) should be disconnected.

Operation: When the water level drops below point D, the controller stops the pump to prevent dry burning.

Wiring for lack of water protection.

Connecting to a Contactor (for high power loads)

For pumps or loads exceeding the controller's direct current rating (25A), it is recommended to connect the DF-96DK to a suitable AC contactor. The controller will then switch the contactor, which in turn controls the high-power load.

Example wiring diagram for connecting the controller to an AC contactor for higher power loads.

Operating Instructions

The DF-96DK controller features a three-position switch on its front panel:

• ON: Forces the pump to run continuously, regardless of water level. Use with caution.
• OFF: Forces the pump to stop, regardless of water level.
• AUTO: Activates the automatic water level control based on the selected wiring configuration (UP pool, DOWN pool, Joint control, or Water shortage protection).

Select the appropriate mode using the switch after ensuring all wiring is correct and secure.

Maintenance

• Regular Inspection: Periodically check all wiring connections for tightness and signs of corrosion or damage.
• Probe Cleaning: Over time, mineral deposits or debris may accumulate on the water level probes, affecting their accuracy. Clean the probes regularly with a non-abrasive brush or cloth to ensure proper contact with water.
• Environmental Conditions: Ensure the controller is installed in a dry, protected environment, away from direct sunlight, extreme temperatures, and excessive humidity to prolong its lifespan.
• Power Disconnection: Always disconnect power to the controller and pump before performing any maintenance or inspection.

Troubleshooting

User Tips

• Probe Length: When purchasing, consider the depth of your water tanks and choose probe wires of appropriate length. The product offers various lengths (2M, 5M, 10M, 15M, 20M, 30M).
• Multiple Tanks: For complex setups involving multiple tanks or long distances between tanks and the pump (e.g., 30 meters), careful planning of probe placement and wiring is essential. You might need to extend probe wires or consider additional control mechanisms depending on the specific requirements. Ensure wire resistance does not significantly impact signal integrity over long distances.
• Contactor Use: If your water pump has a high power rating, always use an external AC contactor with the DF-96DK controller to prevent overloading the controller and ensure safe operation.

Warranty & Support

For warranty information, technical support, or service inquiries, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.

Product Video