Ranco T34-131 Delay/Sequence

As a field-tested technician, you know that protectve controls are the frontline defense for any compressor. The Ranco T34-131 is a 208/240V HVAC time delay relay specifically engineered to eliminate compressor short cycling and prevent premature equipment failure during power flickers or pressure cut-outs. This sequence control manages the critical rest period between cycles, ensuring that head pressures equalize before the motor attempts to restart under load. Consuming only 4 watts, this low-draw component integrates seamlessly into existing control circuits, serving as a drop-in HVAC replacement part for legacy units like the HK25MJ172. Whether you are staging multiple units to avoid high inrush currents or simply adding a delay-on-break layer of protection to a residential condenser, the Ranco T34-131 provides the precise timing reliability professional contractors demand. Its robust construction is designed for high-traffic commercial environments where frequent cycling is inevitable, making it a staple for any service truck specializing in cooling system maintenance.

• Enhanced Compressor Protection: Actively prevents the rapid on/off cycling that leads to overheated windings and failed start components.
• Universal Compatibility: Operates on standard 208/240V AC systems, making it a versatile HVAC delay timer for both commercial and residential applications.
• Energy Efficient: Minimal 4W power consumption ensures the control remains active without adding significant parasitic load to the system.
• Simplified Wiring: Direct replacement design mirrors standard wiring diagrams (Wiring Diagram 2) for faster installs and less time on the roof.

Is the Ranco T34-131 a delay-on-make or delay-on-break control?
This unit is primarily utilized as a sequence control to prevent short cycling by enforcing a specific rest period after power is interrupted or the thermostat opens the circuit.

Can I use this for 120V applications?
No, this specific model is rated for 208/240V. For 120V systems, you would typically look at the T34-132 variant to ensure voltage compatibility and avoid damaging the internal circuitry.

Will this help with high starting torque issues?
While it doesn't provide additional torque, it ensures the compressor doesn't try to start against high head pressure, which is a leading cause of locked rotor amps (LRA) and tripped breakers.

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.