Connecting The Outdoor Units - Carrier 38VMH072 Series Installation And Maintenance Instructions Manual

CONNECTING THE OUTDOOR UNITS

1. When connecting the refrigerant pipes between outdoor
units, the pipes should be placed horizontally.
2. Do not run pipes above the pipe outlets.
3. All connecting pipes coming out of the outdoor units
must be at the same level as shown in Fig 22.
Fig. 22 —Correct Refrigerant Pipe Setup
4. The branch joint must be installed parallel to the ground,
and the angle of the joint should not be greater than 10
degrees. Positioning the branch joint more than 10
degrees from parallel can cause malfunctions. See Fig. 23
and 23 for correct positioning of the joint.
Fig. 23 —Correct Branch Joint Positioning
5. To avoid oil accumulating in the system, install the
branch joints properly.
6. See Fig. 25 for typical refrigerant piping layout.
7. For piping diameters and branch joint selection see
Tables 9-16.
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