Fujitsu FO20R Series Installation Instructions Manual page 17

Variable speed r-410a heat pump outdoor units

4.5 Line Set Installation (cont.)

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

Figure 3

For applications with the outdoor unit and indoor

unit on the same level the following is required:

• Insulated liquid line in unconditioned space only.

• Insulated vapor line full length.

• Vapor line should slope toward the indoor unit.

(Reference Figure 3)

REFERENCE TABLE 2 FOR

MAXIMUM LENGTH LIMITATIONS

INSULATED VAPOR LINE FULL LENGTH

• Follow the proper line sizing, maximum linear

• Verify at least 5°F [2.8°C] sub-cooling at the

4.0 INSTALLATION

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.

ST-A1219-01-01

and equivalent length, charging requirements,

and oil level adjustments spelled out in this docu-

ment.

indoor unit prior to expansion device.

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