Lennox VEP034N432US User Manual page 15

DC Inverter Multi VRF System
4.2.2 Allowable Length and Height Difference of Connection Pipe
Y type branch joint is adopted to connect indoor and outdoor units. Connecting method is shown
in the figure below:
NOTE: Equivalent length of one Y-type branch is 0.5m.
Fig.8 Allowable Length and Height Difference of Connection Pipe
Piping parameters of VEP027N432US,
VEP034N432US, VEP042N432US.
Total length (actual length) of fitting pipe
Length of farthest fitting pipe (m)
From the 1 branch to the farthest indoor pipe
st
Height difference between ODU and
IDU
Height difference between IDUs
Actual length
Equivalent length
ODU at upper side
ODU at lower side
11
Allowable
value
250m L1+L2+L3+a+b+c+d
100m
120m
40m
30m
30m
10m
Fitting pipe
L1+L2+L3+d
L2+L3+d
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