LG MULTI V ARNU073TUD4 Installation Manual page 36

REFRIGERANT PIPING
Pipe Supports
A properly installed pipe system must be adequately supported to avoid pipe sagging. Sag-
ging pipes become oil traps that lead to equipment malfunction.
Pipe supports must never touch the pipe wall; supports must be installed outside (around)
the primary pipe insulation jacket. Insulate the pipe first because pipe supports must be in-
stalled outside (around) the primary pipe insulation jacket. Clevis hangers must be used with
shields between the hangers and insulation. Field provided pipe supports must be designed
to meet local codes. If allowed by code, use fiber straps or split-ring hangers suspended
from the ceiling on all-thread rods (fiber straps or split ring hangers can be used as long as
they do not compress the pipe insulation). Place a second layer of insulation over the pipe
insulation jacket to prevent chafing and compression of the primary insulation in the confines
of the support clamp.
A properly installed pipe system will have sufficient supports to avoid pipes from sagging
during the life of the system. As necessary, place supports closer for segments where
potential sagging could occur. Maximum spacing of pipe supports shall meet local codes.
If local codes do not specify pipe support spacing, pipe must be supported:
• Maximum of five (5) feet on center for straight segments of pipe up to 3/4 inches outside
diameter size.
• Maximum of six (6) feet on center for pipe up to one (1) inch outside diameter size.
• Maximum of eight (8) feet on center for pipe up to two (2) inches outside diameter size.
Wherever the pipe changes direction, place a hanger within twelve (12) inches on one side
and within twelve (12) to nineteen (19) inches of the bend on the other side. Support piping
at indoor units, Y-branch, and Header fittings as shown.
Figure 21: Pipe Support at Indoor Unit.
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Figure 22: Pipe Support at Y-branch Fitting.
Max. 12"
~ 12" – 19"
Maximum 12"
Due to our policy of continuous product innovation, some specifications may change without notification.
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Figure 19: Pipe Hanger Details.
Figure 20: Typical Pipe Support Location—
Change in Pipe Direction.
Figure 23: Pipe Support at Header Fitting.
Max. 12"
Max. 12"
Max. 12"
~ 12" – 19"
Max. 12"
Max. 12"