15
Tubing
INSTALLATION
Interconnecting Tubing (cont�)
For applications that are considered to have a long
line set with the outdoor unit and indoor unit on the
same level the following is required:
• TXV or EEV on the indoor unit
• Start components may be required depending
upon quality of voltage (consistently <200vac at
outdoor unit)
• Crankcase heater (Some models have factory
installed CCH's� Refer to tables on pages 13 and
14�)
• Insulated liquid and suction line in unconditioned
space only�
• Vapor line should slope toward the indoor unit
• Follow the proper line sizing, equivalent length,
charging requirements, and oil level adjustments
spelled out in this document and the outdoor
units I&O
• Verify at least 5°F sub-cooling at the ID unit prior
to throttling device
ST-A1219-02-02
OUTDOOR UNIT BELOW INDOOR SECTION LINE SET
ROUTE
REFIGERANT LINES
EVEN WITH TOP OF
COIL OR INSTALL
INVERTED TRAP.
INSULATE
LIQUID AND
SUCTION LINE
REFERENCE TABLE 2 FOR
MAXIMUM LENGTH
LIMITATIONS
For applications that are considered to have a long
line set with the outdoor unit below the indoor unit
the following is required:
• TXV or EEV at the IDunit
•
Crankcase heater (Some moels come with factory
installed CCH's� Refer to tables on page 13 & 14�)
• Start components may be required depending
upon quality of voltage (consistently <200vac at
outdoor unit)
• Refrigerant lines should be routed even with the
top of the ID coil or an inverted trap is to be ap-
plied. (Reference gure 4).
• Insulated liquid and suction line in uncondi-
tioned space only�
• Follow the proper line sizing, equivalent length,
charging requirements, and oil level adjustments
spelled out in this document and the outdoor
units I&O
• Measure pressure at the liquid line service valve
and prior to expansion device� Verify that it is
not greater than 50 PSI
• For elevations greater that 25’ can expect a
lower sub-cooling
Figure 4
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