17
Tubing
4.5.2.3 Outdoor Unit Above Indoor Coil
For applications with the outdoor unit above the indoor coil the following is required:
1. Insulated liquid line in unconditioned space only.
2. Follow the proper line sizing, maximum linear and equivalent length, maximum vertical separation,
charging requirements, and oil level adjustments spelled out in this document.
3. Insulated vapor line full length.
4. Verify at least 5°F [2.8ºC] of liquid subcooling at the outdoor unit prior to expansion device in the heat-
ing mode.
Figure 10: Liquid Line Routing for Unit Installed Above Indoor Coil
Item Number Descripton
1 Insulated Vapor Line Full Length
2 Verify Liquid Sub-Cooling At Outdoor Unit Prior To
Expansion Device
3
Insulated Liquid Line In Unconditioned Space For
Long Line Application.
4
Reference Table 6 For Maximum Length And
Vertical Separation Limitations.
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