Ranco C21-2014 Temperature Control

The Ranco C21-2014 Temperature Control is a versatile SPDT HVAC thermostat designed for precision temperature management in commercial refrigeration and air conditioning applications. Engineered for reliability, this remote bulb temperature controller features a Single Pole Double Throw (SPDT) switch configuration, allowing for both heating and cooling logic. With a temperature range of 54°F to 90°F and a fixed differential, it provides consistent cycling for equipment protection. The 21-inch capillary tube allows for flexible sensor placement, ensuring accurate readings of ambient or coil temperatures. This Ranco C21 series control is a frequent replacement for various commercial refrigeration controls, offering a rugged steel housing and easy-access terminals for field wiring. When performing a Ranco C21-2014 installation, ensure the sensing bulb is securely mounted to maintain thermal contact and prevent short-cycling. Its compact design makes it an ideal fit for tight HVAC control cabinets and specialized equipment housings.

• Universal SPDT Switching: Supports both make-on-rise and break-on-rise applications, increasing service truck versatility.
• Precise 54-90°F Range: Optimized for standard comfort cooling and medium-temperature refrigeration storage.
• Durable 21" Capillary: copper construction ensures rapid thermal response and resistance to vibration.
• Fixed Differential Calibration: Simplifies setup and minimizes the risk of improper field adjustment.
• Field-Proven Reliability: Heavy-duty mechanical design withstands the rigors of commercial mechanical rooms.

Common Technical Questions

Can I use this control for both heating and cooling?
Yes, the Ranco C21-2014 features SPDT contacts, meaning it has one common terminal, one normally open terminal (closes on rise for cooling), and one normally closed terminal (opens on rise for heating).

What is the benefit of the 21-inch capillary?
The extended capillary length allows the control to be mounted in a protected enclosure while the sensing bulb is positioned directly in the airflow or against an evaporator coil.

Is the differential on this model adjustable?
No, the C21-2014 utilizes a fixed differential to ensure consistent operation levels and prevent unauthorized tampering with system cycles.

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.