Daikin-McQuay 300003004 Relay

The Daikin-McQuay 300003004 Relay is a specialized 24V reset relay enclosed in a durable protective housing, engineered for precise control in commercial HVAC systems. Designed to interface with low voltage control circuits, this component facilitates the manual or automatic resetting of system logic following a fault condition. Its enclosed design protects the internal electromagnetic coil and contacts from dust and debris, ensuring consistent switching performance in high-demand environments. This relay is a critical component for maintaining secondary safety loops and HVAC system reliability, specifically within McQuay and Daikin Applied air handling units and chiller control panels.

Field technicians will find the 300003004 offers a direct mechanical fit for legacy and modern control configurations. When troubleshooting failure-to-start sequences, verify coil resistance and continuity through the normally open and normally closed contacts. This relay serves as a primary control circuit replacement part, maintaining the integrity of the original equipment manufacturer’s sequence of operation without compromising system logic or safety parameters.

• Enclosed Housing: Protects internal relay contacts from environmental contaminants, extending service life in industrial settings.
• 24V Control Logic: Standardized for seamless integration with commercial HVAC controllers and thermostats.
• Simplified Reset Function: Optimized for safety circuit applications where a positive reset action is required for system restart.
• OEM Compatibility: Ensures proper Daikin-McQuay equipment maintenance by meeting exact electrical specifications.

Is the 300003004 relay compatible with non-Daikin systems?
While designed for Daikin-McQuay units, this is a standard 24V enclosed relay. Always verify ampere ratings and pin configurations against your specific wiring diagram before installation.

Can this relay be used for both heating and cooling circuits?
Yes, provided the load does not exceed the rated capacity of the internal contacts. It is frequently utilized in HVAC safety sequences regardless of the specific thermal cycle.

Does the enclosure allow for field mounting?
The enclosed design supports secure mounting within a control cabinet, protecting the electrical connections from accidental contact and vibrations.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.