Pipe Sleeves At Penetrations; Underground Refrigerant Piping - LG MULTI F Engineering Manual

F
MULTI
F
MULTI MAX

Pipe Sleeves at Penetrations

LG requires that all pipe penetrations through walls, floors, and
pipes buried underground be routed through a properly insulated
sleeve that is sufficiently sized to provide free movement of the pipe
and does not compress the insulation. Underground refrigerant pipe
shall be routed inside a protective sleeve to prevent insulation dete-
rioration. Also follow federal, state, and local regulations and codes
when choosing a sleeve type.
Figure 278:Pipe Sleeve Options.
Inside wall (concealed)
C
A
B
Floor (fire-resistance)
D
F
G
B

Underground Refrigerant Piping

Refrigerant pipe installed underground should be routed inside a
vapor tight protective sleeve to prevent insulation deterioration and
water infiltration. Refrigerant pipe installed inside underground
casing must be continuous without any joints. Underground refriger-
ant pipe must be located at a level below the frost line.
Table 118: Utility Conduit Sizes.
Liquid Pipe
1
1/2 (2.0
1/4 (1.0)
4
3
3/8 (1-1/8) 4
3
1/2 (1-1/2) 5
4
5/8 (1-5/8)
5
4
3/4 (1-3/4)
5
4
OD pipe diameter in inches; Values in parenthesis () indicate OD of pipe with insulation jacket.
1
Diameter of pipe with insulation. Thickness of pipe insulation is typical. Actual required thickness may
2
vary based on surrounding ambient conditions and should be calculated and specified by the design
engineer.
Insulation thickness (value in parenthesis) = 3/8 inch.
3
Insulation thickness (value in parenthesis) = 1 inch.
4
Insulation thickness (value in parenthesis) = 3/4 inch.
5
INSTALLATION & LAYOUT BEST PRACTICES
Outside wall Outside wall (exposed)
D
B
A
Area between fire-resistant
Roof pipe shaft insulation and boundary wall
G
D
B
H
Vapor Pipe
1
) 5/8 (2-1/8 ) 3/4 (2-1/4
2,5 2,5
4
4
5
5
5
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.
Refrigerant Piping System Layout
Diameter of penetrations shall be determined by pipe diameter
plus the thickness of the insulation.
For example:
Diameter of Gas Piping:
Diameter of Liquid Piping:
Thickness of Gas Piping Insulation:
Thickness of Liquid Piping Insulation:
Surplus:
Sleeve diameter (total):
E
B
I
I
J
When filling an access hole with mortar, cover the
area with steel plate so that the insulation will not
fall through. For this area, use fire-resistant
A materials for both the insulation and cover. (Vinyl
cover should not be used.)
40 in 40 in
Figure 279:Typical Arrangement of Refrigerant Pipe and Cable(s) in a
Utility Conduit.
)
2,5
4
5
Figure 280:Underground Refrigerant Piping.
5
5
5
1/2"
1/4"
0.4" x 2
0.4" x 2
0.8"
3.1" minimum
Sleeve
Insulation
Lagging
Caulk
Band
Water-resistant layer
Sleeve with edge
Lagging
Mortar or other fire-resistant caulk
Fire-resistant insulation
Vapor Line
Insulation Material
Liquid Line
Pipe Sleeve
Insulation
Material
Min. 18 Gauge
Power/Communication
Cable
DESIGN & PRACTICES | 203