Johnson Controls C-5222-3 Repeater

Professional-grade pneumatic control systems demand precise signal manipulation, and the Johnson Controls C-5222-3 Repeater is the industry standard for high-ratio pressure adjustments. Specifically engineered as an adding/subtracting repeater, this device features a 5:1 ratio, allowing technicians to significantly amplify or reduce transmitter output signals. As a low volume output auxiliary device, it is optimized for increasing sensitivity in low-limit applications or establishing precise pneumatic set points without interfering with primary control loops.

This proportional, direct-acting relay is a double spring-loaded, biased instrument that can be field-adjusted to bias output from +5 to -13 psi. Designed for versatility, the C-5222-3 supports in-line or panel mounting via 1/4 inch O.D. polytubing and standard barbed fittings. Veteran HVAC contractors rely on this unit for complex hot water reset and solar switching applications where maintaining a constant ratio over the entire operating range is non-negotiable for system stability.

Key Benefits

• High Sensitivity: The 5:1 ratio provides the necessary gain for precision sensing in critical low-limit pneumatic environments.
• Versatile Biasing: Adjustable range from +5 to -13 psi allows for exact signal offsetting to match specific mechanical requirements.
• Durable Construction: Reliable pneumatic repeater design ensures long-term performance in demanding commercial HVAC mechanical rooms.
• Easy Installation: Features barbed fittings marked for hookup convenience and supports flexible mounting configurations.

Common Questions

How do you adjust the bias on the C-5222-3?
Adjustment is performed using the knob located at the top of the instrument. Technicians should vary the input pressure slowly while verifying the 5:1 relationship against the nominal pressure scales.

Can the C-5222-3 be used as a low signal selector?
Yes, in 5:1 configurations, it is frequently utilized to provide a low-limit set point, functioning as a signal selector to prevent interference with normal control until a specific threshold is reached.

What type of maintenance does this repeater require?
This is an auxiliary pneumatic device with no internal field-serviceable parts. If the unit fails to maintain its ratio or bias within specifications, a full unit replacement is the standard protocol.

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.