Lennox VPB Series, Installation & Operation Instructions

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20
Indoor unit branch kits have graduated piping diam-
eters.
• The piping can be cut to suit the installation
needs. See figure 19.
• Use a pipe cutter designed for refrigeration tub-
ing to cut pipe.
• Discard unused pipe.
• Refer to the Lennox VRF Selection Software
(LVSS) pipe sizing diagram to obtain the correct
inlet and outlet sizes for the installation.
• Keep all components sealed until brazing.
IMPORTANT
Locate first branch pipe kit of the system centrally
to ensure correct distribution of refrigerant.
ID:1-1/8 ID:1-1/4
OD:1-1/8
ID:1-1/8
ID:3/4
ID:7/8
OD:1-1/8
ID:3/4 ID:7/8
OD:1-1/8
ID:5/8
3/4” Refrigerant Pipe
7/8” Refrigerant Pipe
Cut Here
Be sure to maximize the total
length of the socket to ensure a
good joint
No Cut Needed
1-1/8” Refrigerant Pipe
Cut Here
Be sure to maximize the total
length of the socket to ensure a
good joint
Figure 18. Cutting Branch Pipe Kits to Size Example
Horizontal Runs
When installed horizontally, these branch pipe kits
MUST be installed level +/- 10°.
Vertical Runs
When installed vertically, mode selection branch
kits MUST be installed straight up or straight down.
Vertical Surface
Figure 17. Horizontal Installation
Figure 19. Vertical Installation
10°
10°
Horizontal Surface
Correct Wrong