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Fujitsu FO20R Series Installation Instructions Manual page 19

Variable speed r-410a heat pump outdoor units
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4.5.2.3 Outdoor Unit Above Indoor Coil
Figure 5
For applications with the outdoor unit above the
indoor coil the following is required:
• Insulated liquid line in unconditioned space only.
• Follow the proper line sizing, maximum linear and
equivalent length, maximum vertical separation,
charging requirements, and oil level adjustments
spelled out in this document.
4.0 INSTALLATION
• Insulated vapor line full length.
• Verify at least 5°F [2.8ºC] of liquid subcooling at
the outdoor unit prior to expansion device in the
heating mode.
19

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