15
Figure 8: Slop Vapor Line Toward the Indoor Unit
4.5.2 Relative Location of Indoor and Outdoor Units
4.5.2.1 Outdoor Unit Level or Near Level to Indoor Coil Line Set
For applications with the outdoor unit and indoor unit on the same level the following is required:
1. Insulated liquid line in unconditioned space only.
2. Insulated vapor line full length.
3. Vapor line should slope toward the indoor unit. (Reference Figure 8)
4. Follow the proper line sizing, maximum linear and equivalent length, charging requirements, and oil
level adjustments spelled out in this document.
5. Verify at least 5°F [2.8°C] sub-cooling at the indoor unit prior to expansion device.
Item
Number
Descripton
1 Reference Table 6 For Maximum Length Limitations
2 Ideally, Line Set Slopes Away From Outdoor Unit.
Verify Sub-Cooling Prior To Expansion Device,
Insulated Liquid Line In Unconditioned Space For
Long Line Applications.
3 Insulated Vapor Line Full Length
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