Drain Alert DAU-RS
Drain Alert Condensate Float Switch
Model: DAU-RS
Brand: Drain Alert
1. Introducció
The Drain Alert DAU-RS is a versatile condensate float switch designed for use with HVAC systems. It is engineered to detect rising water levels in primary and auxiliary drain pans, preventing potential water damage by shutting off the system when a high water level is detected. Its compact design allows for installation in most applications, and its transparent body functions as a sight glass for easy monitoring. This device is suitable for both metal and plastic drain pans and operates on 24-volt systems.
2. Informació de seguretat
Always read and understand all instructions before installing or operating this device. Failure to follow safety guidelines may result in property damage, injury, or death.
- Risc elèctric: Disconnect all power to the HVAC system before installation or maintenance. Work on electrical components should only be performed by qualified personnel.
- Voltage Compatibilitat: This device is designed for 24-volt AC systems only. Do not connect to higher voltagsistemes electrònics.
- Instal·lació correcta: Ensure the float switch is installed correctly and securely to prevent false triggers or failures.
- Inspecció periòdica: Periodically inspect the float switch and drain pan for debris or blockages that could impede proper operation.
- Certificat UL: This product is UL Certified, indicating compliance with specific safety standards.
3. Producte acabatview
The Drain Alert DAU-RS is a compact and durable condensate float switch. Its transparent housing allows for visual inspection of the float mechanism and water level. It features 72-inch leads for flexible wiring connections.

This image displays the Drain Alert DAU-RS condensate float switch, showing its clear cylindrical body, red electrical leads, and a removable threaded cap. The clear body allows for visual inspection of the internal float mechanism.

Aquesta imatge ofereix un costat view of the DAU-RS switch, highlighting the threaded connection point for integration into drain lines or pans. The red wires are neatly coiled and secured.

This image shows the front of the Drain Alert DAU-RS product packaging, featuring the brand logo, model number, UL Certified 508 mark, and "Made in the USA" designation.

This image displays the Drain Alert DAU-RS float switch and its components, including the threaded cap and red wires, sealed within its clear blister packaging.
4. Configuració i instal·lació
The DAU-RS float switch is designed for easy installation without requiring gluing or cutting of existing drain lines. It can be installed in primary or auxiliary drain pans.
4.1 Eines necessàries
- Pelacables
- Screwdriver (for thermostat terminal screws)
- Multimeter (optional, for testing connections)
4.2 Passos d'instal·lació
- Desconnecteu l'alimentació: Before beginning any work, ensure all electrical power to the HVAC unit is completely disconnected at the circuit breaker. Verify with a multimeter if possible.
- Locate Drain Pan: Identify the primary or auxiliary drain pan where the float switch will be installed. The switch should be positioned at a point where rising condensate water will activate the float before overflowing the pan.
- Instal·la l'interruptor: The DAU-RS can be threaded directly into a suitable opening in the drain pan or a drain line fitting. Ensure a watertight seal. The transparent body should be oriented vertically to allow the internal float to move freely.
- Connexions de cable:
- The DAU-RS has two 72-inch leads. These leads are typically wired in series with the 24-volt thermostat control circuit.
- Connect one lead to the "R" (24V hot) terminal and the other lead to the "Y" (cooling call) terminal of the thermostat circuit. This configuration will shut off the compressor when the float switch is activated.
- Alternatively, for systems where only the compressor needs to be shut off while the fan continues to run, wire the switch into the "Y" circuit only. Consult your HVAC system's wiring diagram for specific connections.
- Ensure all wire connections are secure and insulated.
- Prova de funcionament:
- Restore power to the HVAC unit.
- Manually raise the float within the switch or slowly add water to the drain pan until the float rises.
- Observe if the HVAC system (specifically the compressor) shuts off when the float is activated.
- Remove the water or lower the float; the system should resume normal operation.
- Comprovació final: Ensure there are no leaks and all connections are secure.
5. Instruccions de funcionament
The Drain Alert DAU-RS operates automatically. When the condensate water level in the drain pan rises due to a clog or excessive condensation, the internal float within the switch will lift. Upon reaching a predetermined level, the float activates an internal switch, which breaks the 24-volt control circuit to the HVAC system. This action typically shuts down the compressor, preventing the drain pan from overflowing and causing water damage.
The transparent body allows for visual confirmation of the float's position and the water level in the switch, acting as a sight glass. Once the clog is cleared and the water level recedes, the float will drop, and the switch will reset, allowing the HVAC system to resume normal operation.
6. Manteniment
Regular maintenance of your HVAC system's drain pan and the DAU-RS float switch is crucial for reliable operation and preventing water damage.
- Inspecció anual: At least once a year, typically before the cooling season, inspect the drain pan and the float switch.
- Clean Drain Pan: Clear any debris, algae, or sludge from the drain pan and the condensate drain line. Use a suitable cleaning solution if necessary.
- Test Float Switch: Manually test the float switch by slowly pouring water into the drain pan until the float rises and activates the switch, shutting off the HVAC unit. Ensure the system shuts down as expected.
- Inspeccionar per danys: Check the float switch for any signs of physical damage, cracks, or wear. Ensure the wires are intact and connections are secure.
- UV Light Inhibitor: The DAU-RS contains a UV light inhibitor to protect against sunlight, but prolonged direct exposure should still be minimized if possible.
7. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| HVAC system not turning on (or shuts off unexpectedly) |
|
|
| Water overflowing from drain pan, but HVAC system is still running |
|
|
Si els passos de resolució de problemes no resolen el problema, es recomana contactar amb un tècnic qualificat de climatització.
8. Especificacions
| Número de model | DAU-RS |
| Marca | Drain Alert |
| Mode d'operació | Automàtic |
| Tipus de contacte | Normalment obert |
| Tipus de circuit | 1 vies |
| Tipus de muntatge | Suport al tauler |
| Tipus d'actuador | Rotary (Float) |
| Material de contacte | Llautó |
| Voltage | 24 Volts AC |
| Valoració actual | 1.5A GP (General Purpose) |
| Longitud del plom | 72 polzades |
| Material | Durable, high-impact resistant body with UV light inhibitor |
| Certificacions | UL Certified 508 |
| Pes de l'article | 8 unces |
| País d'origen | Fabricat als EUA |
9. Garantia i Suport
For specific warranty information, please refer to the documentation included with your purchase or contact the manufacturer directly. Drain Alert products are manufactured in the USA.
For technical support or inquiries, please visit the official Drain Alert weblloc web o poseu-vos en contacte amb el seu departament d'atenció al client. Conserveu el rebut de compra per a reclamacions de garantia.
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