29
Installation Manual
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
MULTI
F
MULTI
F
40 in
40 in
A
B
D
F
G
B
G
D
B
H
I
J
A
E
B
I
A
B
D
C
Inside wall (concealed)
Floor (fire-resistance)
Area between fire-resistant
insulation and boundary wall
Roof pipe shaft
Outside wall
Outside wall (exposed)
Sleeve
Insulation
Lagging
Caulk
Band
Water-resistant layer
Sleeve with edge
Lagging
Mortar or other fire-resistant caulk
Fire-resistant insulation
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
materials for both the insulation and cover. (Vinyl
cover should not be used.)
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. Route underground refriger-
ant pipe inside a protective sleeve to prevent insulation deteriora-
tion. Follow federal, state, and local regulations and codes when
choosing a sleeve type.
Figure 31: Pipe Sleeve Options.
For example:
Diameter of Gas Piping:
1/2"
Diameter of Liquid Piping:
1/4"
Thickness of Gas Piping Insulation:
0.4" x 2
Thickness of Liquid Piping Insulation: 0.4" x 2
Surplus: 0.8"
Sleeve diameter (total):
3.1" minimum
Note:
Pipe diameter plus insulation thickness determines wall
penetration diameter.
Underground Refrigerant Piping
Route refrigerant pipe installed underground inside a vapor tight pro-
tective sleeve to prevent insulation deterioration and water infiltra-
tion. Refrigerant pipe installed inside underground casing must be
continuous without any joints. Underground refrigerant pipe must be
located at a level below the frost line.
Figure 32: Typical Arrangement of Refrigerant Pipe
and Cable(s) in a Utility Conduit.
Table 17: Utility Conduit Sizes.
1
OD pipe diameter in inches; Values in parenthesis () indicate OD of pipe with insulation
jacket.
2
Diameter of pipe with insulation. Thickness of pipe insulation is typical. Actual required
thickness may vary based on surrounding ambient conditions and should be calculated
and specified by the design engineer.
3
Insulation thickness (value in parenthesis) = 3/8 inch.
4
Insulation thickness (value in parenthesis) = 1 inch.
5
Insulation thickness (value in parenthesis) = 3/4 inch.
Figure 33: Underground Refrigerant Piping.
Liquid
Pipe
1
Vapor Pipe
1
3/8 (1-1/8
2,3
) 1/2 (2.0
2,5
) 5/8 (2-1/8
2,5
) 3/4 (2-1/4
2,5
)
1/4 (1.0)
3
4
4
4
4
3/8 (1-1/8)
3
4
4
4
5
Vapor Line
Liquid Line
Min. 18 Gauge
Cable
Power/Communication
Pipe Sleeve
Insulation Material
Insulation
Material
GENERAL INSTALLATION GUIDELINES
Refrigerant Piping
