17
OUTDOOR UNIT LEVEL OR NEAR LEVEL TO INDOOR SECTION LINE SET
IDEALLY, LINE SET SLOPES AWAY
FROM OUTDOOR. VERIFY
SUB-COOLING PRIOR TO
EXPANSION DEVICE, INSULATED
LIQUID LINE IN AN UNCONDITIONED SPACE,
INSULATED SUCTION LINE FULL LENGTH
FOR ALL APPLICATIONS.
ST-A1219-01-01
REFERENCE TABLE 2 FOR
MAXIMUM LENGTH LIMITATIONS
4.5 Line Set Installation (cont.)
4.0 INSTALLATION
4.5.2 Relative Location of Indoor and Outdoor Units
4.5.2.1 Indoor and Outdoor Unit Near Same Level
For applications that are considered to have a long
line set with the outdoor unit and indoor unit near
the same level the following is required:
• EXV or TXV on the indoor coil
• Start components may be required depending
upon quality of voltage (consistantly <200vac at
outdoor unit)
•
Crankcase heater (Some models have factory
installed CCH's. Refer to tables in Section 4.4.5.6.)
• Insulated liquid line in unconditioned space only.
• Insulated suction line full length.
• Suction line should slope toward the indoor unit
• Follow the proper line sizing, maximum linear
and equivalent lengths, charging requirements,
and oil level adjustments spelled out in this man-
ual.
• Verify at least 5°F [2.8°C] liquid sub-cooling at
the indoor unit prior to expansion device in the
cooling mode.
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