Multi F Engineering Manual

REFRIGERANT PIPING DESIGN
Design Guideline Summary
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Max. 49.2 feet
Max. 24.6 feet
A
B
C
D
Multi F with LGRED System
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indoor units connected.
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Outdoor Unit
Minimum Length
for Each Pipe
(ft.)
Maximum Piping Length to
Each Indoor Unit (ft.)
Maximum Total Piping
Length for Each System
(ft.)
Maximum Height Difference
(Max. [ft.])
Outdoor Unit ~ Indoor Unit
Maximum Height Difference
(Max. [ft.])
Indoor Unit ~ Indoor Unit
ABCD
LMU180HHV 10 82 82 - - 164 49.2 24.6
LMU240HHV 10 82 82 82 - 246.1 49.2 24.6
LMU300HHV 10 82 82 82 82 246.1 49.2 24.6
7DEOHMulti F with LGRED Outdoor Unit Refrigerant Piping System Limitations.
Example: LMU360HHV outdoor unit with
four (4) indoor units and one (1) branch
distribution unit connected.
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Indoor Unit[s]).
Multi F MAX with LGRED System with One Branch Distribution Unit
A
h2 IHHW
h3 IHHW
h1 IHHW
BDU
ODU
IDU
IDU
IDU
IDU
B
B
B
B
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DESIGN & PRACTICES | 201
Refrigerant Piping Design and Best Practices
MULTI
F
MAX
MULTI
F