REFRIGERATION LINE CONNECTIONS
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
-Check carefully for leaks before starting the test run.
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Indoor unit | Evaporator | Condenser | Outdoor unit |
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Refrigeration Tubing |
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Connection method |
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| Flare | Flare | Flare | Flare | Flare |
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Refrigerant tube outer diameter | in. | Liquid | 1/4 | 1/4 | 1/4 | 1/4 | 3/8 |
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| in. | Suction | 1/2 | 1/2 | 1/2 | 5/8 | 5/8 |
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Limit of tubing length | ft. |
| 49 | 49 | 49 | 49 | 49 |
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Limit of elevation difference between the two units | ft. |
| 20 | 20 | 20 | 20 | 20 |
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