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Wine Cellar Refrigeration Solutions For the Trade Menu

Technical Service Bulletin

Automatic Expansion Valve (AXV)

All USCS split cooling systems (except the CC Series) operate with a Pressure Regulating Valve aka. Automatic Expansion Valve (AXV). This valve promotes a constant pressure of the refrigerant to the evaporator coil. Valves are preset from the factory to be within tolerance and are installed in the evaporator coil prior to orders shipping out. However, the valve can be jostled out of adjustment during the shipping process. It is always recommended to verify all details of the Diagnostic Report during new installations or a troubleshooting procedure.

Normal operating pressures are 28psig-32psig.

The valve can be adjusted if necessary by following the following procedure:

*Attach manifold gauges prior to making any adjustments

1. With the system running check and record all data on the Diagnostic Report

2. Adjustments are made with the screw conveniently located at the top of the valve

3. Turning the screw ½ turn will result in a 5lb. change in pressure

CLOCKWISE- WILL INCREASE PRESSURE

COUNTERCLOCKWISE- WILL DECREASE PRESSURE

It is recommended that the system runs for 30 minutes before making any adjustments.

For every adjustment made, let the system run 10 minutes before taking gauge pressure readings.

If problems continue please contact USCS for troubleshooting assistance.

Click here to download a PDF version of this pageDownload PDF Construction of a Wine Cellar

The New AXV Valve of Split Cooling Systems and How It Works!

Call +1 (562) 513-3017 & ask for Systems Design

US Cellar Systems creates cooling systems for every size and style of refrigerated wine storage. We have multiple product lines available and can work with you to select and customize the most effective cooling unit for your projects. We are proud to work with builders, contractors, designers, architects, and other custom wine cellar construction experts. Call us today in California at (562) 513-3017 or in Oregon at (503) 928-8778!