LG MULTI F Engineering Manual page 201

F
MULTI
F
MULTI MAX
Inserts and Pipe Supports
Inserts
An insert can be installed into a floor or beam before the concrete sets so that fittings such as ducts,
pipes, or suspension bolts can be added at a later time. Decide where the inserts should be placed
before support installation.
Pipe Supports
A properly installed pipe system should be adequately supported 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. 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 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 within the confines of the support pipe
clamp.
A properly installed pipe system will have sufficient supports to avoid pipes from sag-
ging 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
a maximum of 5 feet on center for straight segments of pipe up to 3/4" outside diameter
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. Sup-
port piping at indoor units as shown. Support Y-Branch fittings as shown.
Figure 269:Pipe Support at Indoor Unit.
INSTALLATION & LAYOUT BEST PRACTICES
B
A
A + B ~ 12" – 19"
Due to our policy of continuous product innovation, some specifications may change without notification.
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Refrigerant Piping System Layout
Figure 267:Pipe Hanger Details.
Figure 268: Typical Pipe Support Location—Change
in Pipe Direction.
Figure 270:Pipe Support at Y-branch Fitting.
Max. 12" Max. 12"
Max. 12"
Figure 266:Installing an Insert Into
a Concrete Beam.
Anti-vibration Material
Nail
Suspension Bolt
Concrete Beam
Max. 12"
~ 12" – 19"
DESIGN & PRACTICES | 201