Rheem Manufacturing Company

Ying Gong

Timothy B Hawkins

A gauge manifold is connectable to the suction and liquid lines of an air conditioning refrigerant circuit and has a built-in charge level calculator into which system manufacturing and capacity data is enterable. Charging data corresponding to the input data is stored within the calculator and automatically utilized in conjunction with ambient temperature and refrigerant pressure levels sensed by the calculator to generate a visual display indicating whether the circuit's refrigerant charge level is acceptable, high or low for the particular unit or system being checked. If the displayed charge level is high or low, the gauge manifold is additionally connected to a pressurized refrigerant canister or recycling drum and a valve portion of the manifold is operated to add or remove refrigerant to the circuit, via the gauge manifold, as necessary until the calculator display indicates that the circuit is properly charged.

Refrigerant gauge manifold with built-in charging calculator

An air conditioning unit, representatively an outdoor condensing unit, is provided with a vertically oriented fin/tube coil portion through which a fan inwardly draws ambient air in a generally horizontal direction. The coil has a non-uniform fin arrangement that provides a bottom portion of the coil with an effective fin density lower than that of an upper portion of the coil.

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Fort Smith, AR, United States of America

Ying Gong