17
Length and Maximum Height Difference
Maximum Permitted Length
Piping
Pipe Length
Total Piping Length (Actual)
≤492 ft. (150 m)
L1+A+B+C+D
Maximum Piping Length
Actual Length
≤296 ft. (90 m)
L1+A, L1+B,
L1+C, L1+D
Equivalent Length
≤328 ft. (100 m)
Pipe length (from the header pipe kit to each indoor unit)
65.6 ft. (20 m)
A, B, C, D
≤ 65.6 ft. (20 m) each
Maximum
Height
Difference
Indoor Unit to Outdoor Unit
Maximum Height Difference
Outdoor Unit Up
≤164 ft. (50 m)
- - -
Outdoor Unit Down
≤131 ft. (40 m)
- - -
Indoor Unit to Indoor Unit Maximum Height Difference
≤49 ft. (15 m)
- - -
Description
Designation
Main Outdoor Pipe - from outdoor unit to header pipe kit
L1
Indoor Unit Pipe - from header pipe kit(s) to indoor units
A, B, C, D
A
B
C
Indoor unit
≤
20
m
L1
≤
8m
Maximum Permitted Refrigerant Pipe Length and Maximum Height Difference - With Header Pipe Kit
NOTE - See Refrigerant Pipe Selection Table to size Main Outdoor Pipe.
NOTE - Header pipe kits should be placed between the Outdoor Unit and Indoor Units.
Header pipe kits cannot be connected in series.
NOTE - In applications requiring more than one Header pipe kit,
call Lennox VRF Applications Department for assistance.
Maximum Height Dif
ference
Outdoor Unit to Indoor Unit
M
aximum Height Di
ff
erenc
e
Indoor Unit to Indoor Unit
D
Mini-VRF
Heat Pump
Outdoor unit
Header Pipe Kit
V8HDRK04
Summary of Contents for VPB H4-3P Series
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