LG Multi V Water IV Installation Manual page 58

REFRIGERANT PIPING INSTALLATION
Pipe Supports
A properly installed pipe system includes adequate support to avoid pipe sagging. Sagging
pipes become oil traps that lead to equipment malfunction.
Pipe supports should never touch the pipe wall; supports shall be installed outside (around) the
primary pipe insulation jacket (see Figure 30). Insulate the pipe first because pipe supports shall
be installed outside (around) the primary pipe insulation jacket. Clevis hangers should be used
with shields between the hangers and insulation. Field provided pipe supports should be de-
signed 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 within the confines of the
support pipe clamp.
A properly installed pipe system will have sufficient support to prevent pipe 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 shall be supported:
• Maximum of five feet (5') on center for straight segments of pipe up to 3/4" outside
diameter (OD) size.
• Maximum of six feet (6') on center for pipe from 3/4" (OD) up to one inch (1") OD size.
• Maximum of eight feet (8') on center for pipe from one inch (1") OD to two inches
(2") OD size.
Wherever the pipe changes direction, place a hanger within twelve (12) inches on one
side and within twelve to nineteen (12 to 19) inches of the bend on the other side as
shown in Figure 31. Support piping at indoor units as shown in Figure 32. Support
Y-Branch and Header fittings as shown in Figure 33 and Figure 34.
Figure 32: Pipe Support at Indoor Unit.
Pipe Slope
The horizontal pipe slope cannot exceed 10° up or down.
Pipe Sleeves and Wall Penetrations
LG requires that all pipe penetrations through walls and floors be properly insulated and
routed through an appropriate wall sleeve of sufficient size to prevent compression of
refrigerant pipe insulation and allow free movement of the pipe in the sleeve.
58
Figure 33: Pipe Support at Y-branch Fitting.
B
A
A + B ~ 12" – 19"
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
Max. 12" Max. 12"
Max. 12"
Figure 30: Pipe Hanger Details.
Figure 31: Typical Pipe Support Location—
Change in Pipe Direction.
~ 12" – 19"
Figure 34: Pipe Support at Header Fitting.
Max. 12"
Figure 35:Typical Pipe Penetration.
Sealant
Wall Sleeve
Max. 12"
Max. 12"
Pipe Insulation