Ranco A22-4506 Control

The Ranco A22-4506 Ice Harvest Control is a specialized single pole double throw (SPDT) temperature controller engineered for precision ice machine applications. Operating within a temperature range of -19°F to 22°F, this control manages the critical cycling between freezing and harvesting phases by sensing evaporator temperatures. The unit features a 72-inch capillary tube, providing sufficient length for flexible mounting and accurate sensing bulb placement in various cabinet configurations. This commercial ice machine thermostat is a standard field replacement for several OEM components, ensuring high compatibility with major brands like Manitowoc and Scotsman. For technicians, the Ranco A22 series is preferred for its reliable mechanical switching and durable construction in high-moisture environments. Integrating this HVACR refrigeration control ensures consistent bridge thickness and efficient harvest cycles, minimizing downtime caused by erratic freeze times. Proper installation requires careful attention to the capillary bulb placement to prevent premature cycling or evaporator freeze-ups.

• SPDT Switch Configuration: Allows for seamless control over both compressor and harvest solenoid circuits.
• Wide Operating Range: Adjustable setpoints from -19°F to 22°F accommodate diverse ice harvest cycle requirements.
• Extended Capillary: The 72-inch lead offers versatility for remote mounting away from high-vibration areas.
• Heavy-Duty Construction: Built to withstand the humidity and temperature fluctuations common in commercial kitchen environments.

How do I verify if the Ranco A22-4506 is the correct replacement for my OEM part?
Confirm the temperature range and lead length match your existing specs. This replacement ice machine control is designed for units that trigger harvest based on evaporator temperature. Always cross-reference the manufacturer part number on the original housing.

What are the wiring implications of the SPDT switch?
The SPDT contact provides one common terminal, one normally open, and one normally closed. This allows the control to break the circuit to the cooling components while simultaneously making the circuit to the harvest heater or hot gas valve.

Can the capillary tube be shortened if it is too long?
No, the capillary tube contains a precise chemical charge and must never be cut or kinked. Excess tubing should be carefully coiled away from sharp edges or moving parts.

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.