Daikin-McQuay 028210138 Relay

The Daikin-McQuay 028210138 is a professional-grade 300s Time Delay Relay engineered for precision timing in commercial and industrial HVACR systems. As a critical anti-short cycle timer, this OEM component provides a fixed 5-minute (300-second) delay to protect compressors from rapid cycling, ensuring refrigerant pressures equalize before a restart. Supporting 115V AC control circuits, this SPST-NO relay (Single Pole Single Throw, Normally Open) allows for seamless integration into Daikin McQuay chiller units, PTAC systems, and air handlers. Its solid-state construction ensures steady performance in high-vibration environments typical of mechanical equipment rooms. When replacing a legacy HVAC delay timer, utilizing this genuine part ensures specified compressor protection and maintains the operational integrity of the primary control loop. This Daikin 028210138 relay is essential for technicians managing startup sequences to prevent contactor pitting and motor winding overheating.

• Enhanced Compressor Longevity: Prevents short-cycling by enforcing a 300-second delay between cycles, reducing mechanical stress.
• OEM Compatibility: Designed specifically for Daikin and McQuay equipment, ensuring correct fitment and electrical ratings.
• Simplified Installation: Features standard spade terminal connections for quick field replacement by service contractors.
• Durable Solid-State Logic: Resists environmental interference and wear compared to older mechanical timing components.

Is this relay adjustable?
No, this model is a fixed 300-second time delay relay. It is factory-set to provide a consistent 5-minute delay for standard HVAC protection protocols.

What is the voltage rating for the 028210138 relay?
This specific unit is rated for 115V AC operation. Verify your control circuit voltage before installation to avoid component damage.

Can I use this for both heating and cooling circuits?
Yes, provided the load and control voltage match the specifications, this relay effectively manages timing for compressors, blowers, or auxiliary heat sequences.

This item is not eligible for free shipping.

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.