Wall Mounted Installation Manual

32
Multi F Standard Wall-Mounted Indoor Unit
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MAX
MULTI
F
MULTI
F
Multi F MAX with LGRED Outdoor Unit System Piping Connections
Outdoor Unit Piping Connections LMU360HHV, LMU420HHV
Liquid Line Connection (in., OD) x Qty. Ø3/8 x 1
Vapor Line Connection (in., OD) x Qty. Ø3/4 x 1
Avoid Pipe Damage
• When routing field-provided piping, avoid damaging the outdoor unit from excessive
vibration.
• Properly insulate the liquid and gas lines separately up to the point of connection at
the unit frame.
• See table below for Multi F MAX outdoor unit connection types.
Table 12: Multi F MAX with LGRED Outdoor Unit Piping Connections.
Torque
Wrench
Figure 41: Multi F MAX with LGRED Outdoor Unit
Refrigerant Pipe Connections.
Correctly route the piping so it does not make contact with mounting bolts. Allow room
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Multi F MAX with LGRED Outdoor Units
(36, 42 kBtu/h)
(Only for 18, 24 kBtu/h Indoor Units)
(Only for 36 kBtu/h Indoor Units
to Connect to “D ROOM”)
(Branch Distribution Unit: PMBD3640)
A ROOM
B ROOM
C ROOM
D ROOM
A ROOM
B ROOM
C ROOM
D ROOM
(Branch Distribution Unit: PMBD3641)
Branch Distribution to Indoor Unit Piping Connections
• Install indoor unit liquid and vapor refrigerant pipes (and connection wiring) to the appropri-
ate branch distribution ports.
• Clearly note on the indoor unit’s refrigerant piping (liquid, vapor) which branch distribution
port it is connected to (A, B, C, D).
Table 13: Branch Distribution Unit Piping Connections.
Branch
Distribution Unit
Refrigerant Connections
Pipe Size (in.)
Connectable Indoor Unit Capacity
(Btu/h)
Liquid Vapor
PMBD3620 Ø1/4 x 2 Ø3/8 x 2 7,000, 9,000, 12,000, 15,000, 18,000, 24,000
PMBD3630 Ø1/4 x 3 Ø3/8 x 3 7,000, 9,000, 12,000, 15,000, 18,000, 24,000
PMBD3640 Ø1/4 x 4 Ø3/8 x 4 7,000, 9,000, 12,000, 15,000, 18,000, 24,000
PMBD3641 Ø1/4 x 4
Ø3/8 x 3
7,000, 9,000, 12,000, 15,000, 18,000, 24,000
(A, B, C)
Ø1/2 x 1 36,000 (D)
Figure 42: Branch Distribution Ports to Indoor
Units -- Side View.
Figure 43: Branch Distribution Piping
Connections.
ABC D
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INSTALLATION