When performing a McQuay chiller repair or rooftop unit maintenance

drastically reducing troubleshooting time on-site by verifying the functionality of the reversing valve solenoid and auxiliary heat relays without waiting for the environmental timer to trigger

The ST Series valves are suitable for fluid compositions not exceeding 50% glycol

or a frozen indoor coil despite a clean filter and proper airflow

or high resistance across the closed contacts using a multimeter

Johnson Controls V46AC-3 Valve 326058-755 When performing a McQuay chillerThe Johnson Controls V46AC 3 is a pressure actuated water regulating valve engineered for commercial refrigeration systems and high pressure water cooled condensers. Designed for open on rise operation, this 3 4 inch NPT valve manages head pressure by modulating the flow of water or glycol in response to fluctuations in refrigerant pressure. This specific model features a wide 70 to 260 PSI adjustment range, making it suitable for both R 22 and R 404A