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When connecting the refrigerant tubing
- Keep all tubing runs as short as possible.
- Use the flare method for connecting tubing.
- Apply refrigerant lubricant to the matching surfaces of the flare and union tubes before connecting them, then tighten
the nut with a torque wrench for a leak-free connection.
- Check carefully for leaks before starting the test run.
Evaporator
Condenser
Compressor
Capillary tube
3-Way valve
2-Way valve
Indoor unit
Outdoor unit
Installation & service manual _9
REFRIGERATION LINE CONNECTIONS
Models 9SRA-HE 12SRA-HE 15SRA-HE 18SRA-HE 24SRA-HE
Refrigeration Tubing
Connection method Flare Flare Flare Flare Flare
Refrigerant tube outer diameter in. Liquid 1/4 1/4 1/4 1/4 3/8
in. Suction 1/2 1/2 1/2 5/8 5/8
Limit of tubing length ft. 49 49 49 49 49
Limit of elevation difference between the two units ft. 20 20 20 20 20