ASHRAE Terminology

on an indicator card, the ratio of suction line length to stroke.

arrangement of two vertical suction lines in order to ensure oil entrainment or carryover at minimum load. Often the minimum load line is smaller than the full-load suction riser.

see double-riser suction line.

continuous tube evaporator in which refrigerant from a pressure-reducing device is fed into one end and the suction line connects to the outlet end.

upstream pressure regulator equipped with two controls, used in refrigerant suction lines to provide freeze-up protection or for safety pressure relief.

receiver fitted between the compressor suction line and the return lines of several evaporators in parallel.

encased desiccant, generally inserted in the liquid line of a refrigerating system, and sometimes in the suction line, to remove entrained moisture, acids, and other contaminants.

coating of frost on suction line and crankcase due to liquid refrigerant leaving an evaporator and carried along the suction line into the compressor crankcase.

(1) tube or pipe that carries the refrigerant vapor from the evaporator to the compressor inlet. (2) tube or pipe that connects any line from a store to the suction side of a pump.

accumulator installed in the suction line between evaporator and compressor to trap liquid carryover from the evaporator and to prevent it from reaching the compressor.

a device installed in the suction line of a refrigerating system for the purpose of removing solid contaminants. The device generally consists of a shell with fittings and an internal filtering element.