Multi F Outdoor Condenser Installation Manual

45
General Refrigerant Piping System Information
Due to our policy of continuous product innovation, some specifications may change without notification.
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MULTI
F
MAX
MULTI
F
Pipe Sleeves at Penetrations
LG recommends that all pipe penetrations through walls, floors, and pipes buried underground be properly insulated and routed through an
appropriate wall sleeve of sufficient size to prevent compression of refrigerant pipe insulation and promote free movement of the pipe within
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Figure 42: Pipe Sleeve Options.
Diameter of penetrations must be determined by pipe diameter plus the thickness of the insulation.
Underground Refrigerant Piping
Refrigerant pipe installed underground must be routed inside a vapor tight
protective sleeve to prevent insulation deterioration and water infiltration. Re-
frigerant 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 43: Typical Arrangement of Refrigerant Pipe
and Cable(s) in a Utility Conduit.
Table 20: 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 will vary based on surrounding ambient conditions and must be calculated and
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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.
Liquid Pipe
1
Vapor Pipe
1
3/8 (2.0
2,5
) 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
44 4 4
3/8 (1-1/8)
3
44 4 5
1/2 (1-1/2)
4
55 5 5
5/8 (1-5/8)
4
55 5 5
3/4 (1-3/4)
4
55 5 5
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ble conduit box for inspection. Use galvanized curved sheet metal sad-
dles at all mounting points. Pipe must be allowed to move freely linearly.
REFRIGERANT SYSTEM ENGINEERING
Vapor Line
Liquid Line
Min. 18 Gauge
Cable
Power/Communication
Pi
p
e Sleeve
Insulation Material
Insulation
Material