Typical Multi F/Multi F Max Systems; Major System Components - LG LMN078HVT Installation & Maintenance

F
MULTI
F
MULTI MAX

Major System Components

A typical Multi F system consists of an outdoor unit (ODU), refrigerant piping, and two to four indoor units (IDUs). The standard
wall-mounted units described in this manual are one of the types of IDUs that can be connected to a Multi F system.
A typical Multi F Max system consists of an ODU, refrigerant piping, one or two branch distribution units (BDU), and two to eight
IDUs. The standard wall-mounted units described in this manual are one of the types of IDUs that can be connected to a Multi F
Max system.
Typical Multi F System
Example: LMU36CHV outdoor unit with four (4)
indoor units connected.
ODU: Outdoor Unit.
IDU: Indoor Unit.
A, B, C, D: Piping from Outdoor Unit to Indoor Unit.
Table 7: Multi F Outdoor Unit Refrigerant Piping System Limitations.
Outdoor Minimum Length for Each
Unit Pipe Segment (ft.)
LMU18CHV 9.8
LMU24CHV 9.8
LMU30CHV 9.8
LMU36CHV 9.8
Typical Multi F MAX System with One Branch Distribution Unit
Example: LMU540HV outdoor unit with four
(4) indoor units, and one (1) branch distribu-
tion unit connected.
ODU: Outdoor Unit.
IDU: Indoor Unit.
BDU: Branch Distribution Unit.
A: Main Piping.
B: Branch Piping (Branch Distribution Unit to
Indoor Unit[s]).
Max. 49.2 feet
Maximum Equivalent Pipe Length
to Each Indoor Unit (ft.)
A B
82 82
82 82
82 82
82 82
ODU
h1 ≤ 98.4 feet
Due to our policy of continuous product innovation, some specifications may change without notification.
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GENERAL DATA

Typical Multi F/Multi F Max Systems

A
B
C
D
C D
- -
82 -
82 82
82 82
BDU
B
A
B
B
h3 ≤ 32.8 feet
B
Max. 24.6 feet
Maximum Equivalent Pipe Length
for Each System (ft.)
164
246.1
246.1
246.1
IDU
IDU h2 ≤ 49.2 feet
IDU
IDU
15