Refrigerant lines

Air Conditioning and Heat Pumps · Refrigerant · printed page 220 (PDF page 221)

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Refrigerant Lines Refrigerant Line for Air Conditioning

Text in the illustration

refrigerant lines
cold air return
supply plenum
evaporator coil
furnace
condensate line
suction line (return line) carries cool gas - it is the larger of the two lines and is insulated
liquid line carries warm liquid - it is the smaller of the two lines
extra lines should be coiled horizontally near the evaporator
the suction line should slope down towards the condensing unit at a rate of at least 1/4" per foot

Generated explanation

The illustration shows refrigerant lines connected to an evaporator coil in the supply plenum above a furnace, with a cold air return duct alongside. The larger, insulated suction line carries cool gas, while the smaller liquid line carries warm liquid. Excess refrigerant tubing is shown coiled horizontally near the evaporator. An annotation specifies that the suction line should slope downward toward the condensing unit at least 1/4 inch per foot. A separate condensate line runs from the coil area to a floor drain.

Components

suction line liquid line refrigerant line insulation evaporator coil supply plenum cold air return duct furnace condensate line floor drain

Materials

copper tubing pipe insulation sheet metal

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