Carrier HN67ZA001 Relay

When you're dealing with field modifications on 208/230V, 60 Hz units, the Carrier HN67ZA001 Relay is the industry-standard component for implementing a part winding start. This solid-state time delay relay is engineered specifically to manage compressor inrush current by sequencing the energization of the first and second sets of windings, typically with a 1-second fixed or adjustable delay. As an OEM replacement for a wide range of Carrier, Bryant, and Payne equipment, this HVAC compressor relay ensures precision timing to prevent board-level errors and mechanical stress during startup cycles. The Carrier HN67ZA001 is the official replacement for the HN67ZA003B. Note for the field: unlike the 3B variant, this HN67ZA001 delay timer is not enclosed, meaning you need to be mindful of your mounting location within the control box to avoid exposure to debris or accidental contact. Its 24V control signal integration makes it a versatile HVAC part winding start relay for commercial split systems and packaged units where protecting the compressor motor is a priority. Using the Carrier HN67ZA001 ensures your low voltage circuit and contactor coils operate with the specific timing logic required by the original manufacturer’s schematics.

• Optimized Startup Sequencing: Protects high-value compressors by managing the load during part winding start transitions.
• Solid-State Reliability: Eliminates mechanical failure points, providing consistent timing for the compressor contactor.
• Universal Compatibility: Services as a direct OEM Carrier timing relay for modern and legacy industrial 24V control systems.
• Compact Form Factor: Designed for easy integration into existing control sections, despite the open-frame design.

Is the HN67ZA001 a direct drop-in for the HN67ZA003B?
Yes, it is the functional equivalent and direct replacement, though you must account for the fact that the HN67ZA001 is not enclosed.

Can I use this relay for both heating and cooling cycles?
This relay is typically used in the 24VAC control circuit to sequence compressor windings, making it applicable whenever the compressor is called to run, regardless of mode.

Why is a part winding start relay necessary?
It reduces the initial current draw on startup, which prevents nuisance tripping of circuit breakers and minimizes voltage drops in the facility.

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.