Lennox VPB H4-3P Series

16
6
A
B
C
D
E
First Branch Pipe
Indoor Units
Maximum Piping Equivalent Length
L3
L2
L4
L5
L
L1
Mini-VRF
Heat Pump
Outdoor unit
Maximum Permitted Refrigerant Pipe Length and Maximum Height Difference - With Branch Pipe
Maximum Height Difference Outdoor Unit to Indoor Unit
Maximum Height Difference
Indoor Unit to Indoor Unit
NOTE - See Refrigerant Pipe Selection Table to size Main Outdoor Pipe.
First Branch Pipe to farthest Indoor Unit
Length and Maximum Height Di󰀨erence Maximum Permitted Length Piping
Pipe Length
Total Piping Length (Actual) ≤492 ft. (150 m)
L1+L2+L3+L4+L5+L6
+A+B+C+D+E
Maximum Piping Length
Actual Length ≤296 ft. (90 m)
L1+L3+L4+L5+L6+E
Equivalent Length ≤328 ft. (100 m)
Pipe length (from the rst line branch pipe to farthest
indoor unit)
≤131 ft. (40 m) L3+L4+L5+L6+E
Maximum
Height
Di󰀨erence
Indoor Unit to Outdoor Unit
Maximum Height Di󰀨erence
Outdoor Unit Up ≤164 ft. (50 m) - - -
Outdoor Unit
Down
≤131 ft. (40 m) - - -
Indoor Unit to Indoor Unit Maximum Height Di󰀨erence ≤49 ft. (15 m) - - -
NOTE - Each branch pipe equals 20 in. (508 mm) equivalent straight pipe length.
Description Designation
Main Outdoor Pipe - from outdoor unit to rst branch pipe L1
Main Indoor Pipe - from branch pipe to branch pipe L3, L4, L5, L6
Indoor Unit Pipe - from branch pipe to indoor unit L2, A, B, C, D, E