Tags: CRO Valve

HVAC CRO Valve Service

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Since CRO valves are hermetic and cannot be disassembled for inspection and cleaning, they are usually replaced if inoperative. If a CRO fails to open, close properly, or will not adjust, solder or other foreign material is probably lodged in the port. It is sometimes possible to dislodge these materials by turning the adjustment nut …

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HVAC CRO Valve Adjusting the pressure

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The standard setting by the factory for CROs in the 0/60 psig range is 30 psig. Since these valves are adjustable, the setting may be altered to suit the specific system requirements. CROs should be adjusted at startup when the pressure in the evaporator is above the desired setting. The final valve setting should be …

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