LG MULTI F LMU18CHV Installation Manual page 28

GENERAL INSTALLATION GUIDELINES
Piping Materials and Handling
Multi F MAX Y-Branch Kit PMBL5620
branch distribution units are connected on one Multi F MAX system.
Field-supplied fittings are not permitted. Each Y-Branch kit comes
with two (2) Y-branches (one for the liquid line and one for the vapor
line) and insulation covers.
Y-branches may be installed in horizontal or vertical configurations.
When installed vertically, position the Y-branch so the straight-
Y-branch so the take-off leg is level and shares the same horizontal
Y-branches must be properly installed following instructions in the
applicable LG manual. Y-branches should always be installed with
the single port facing the outdoor unit and the two-port end facing
the branch distribution units.
wards as refrigerant flow cannot make U-turns. The Y-branch kit
must be located at least three (3) feet from the outdoor unit. Provide
a minimum of 20 inches between a Y-branch and the branch
distribution unit.
It is recommended that when a Y-branch is located in a pipe chase
or other concealed space, access doors should be provided for
inspection access.
to the main pipe segment entered into LATS Multi F piping design
software.
• Design pressure is 551 psig.
• All dimensions in inches. Tolerance ±1/4 inch.
• Images are not to scale.
Figure 24:
A
Viewed from A in direction of arrow
28
Do not install Y-branches back-
Horizontal
plane
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.
Figure 21: Y-Branch Connections.
To Branch Distribution Unit Ø3/4
To Outdoor Unit
Ø3/4
Table 15: Y-Branch Connection Diameters.
Y-Branch
Model
Liquid
PMBL5620
Figure 22:
1
Figure 23: Y-Branch Dimensions Diagram.
1
A
A = To Outdoor Unit
Figure 25:
Within 5°
Within 5°
MULTI
MULTI
To Outdoor Unit
Ø3/8
Ø3/4
Type
1 2
3/8 3/8 3/8
Vapor 3/4 3/4 3/4
2
Y
3
X
B = To Branch Distribution Unit
Vertical Up Vertical Down
Configuration Configuration
Within ± 3° Within ± 3°
F
F
MAX
To Branch Distribution Unit Ø3/8
Ø3/8
Dimensions
3 X Y
13.80 3.24
12.48 3.02
2
3
B