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9
Installation instruction
Long pipe and high drop
1. Allowable pipe length and height difference
Permissible value Piping part
Piping
length
Total length of piping (actual length) 492ft.(150m) L1+L2+L3+L4+a+b+c+d+e
Longest piping L Actual length 230ft.(70m) L1+L2+L3+L4+e
Piping length of indoor unit which is furthest to the rst branch
piping L (*)
131ft.(40m) L2+L3+L4+e
Drop
height
Drop height between indoor and outdoor unit
H
Up outdoor 98ft.(30m) ——
Under outdoor 66ft.(20m) ——
Drop height between indoor units h 49ft.(15m) ——
Maximal length and drop height permissible of refrigerant piping
Drop height between indoor and outdoor units
Drop height between
indoor units
h≤49ft.(15m)
Length of the longest piping after the
rst branch piping L
First branch piping
Outdoor unit
Indoor unit
Length of the longest piping L
A. Outdoor unit
Unit pipe spec and connection method (unit: in.(mm))
Model
Gas pipe side Liquid pipe side
Diameter Connecting method Diameter Connecting method
MVHP036MV2AA Ø5/8"15.88
Flared joint
Ø3/8"9.52
Flared jointMVHP048MV2AA Ø5/8"15.88 Ø3/8"9.52
MVHP056MV2AA Ø5/8"15.88 Ø3/8"9.52
B. Indoor unit
Please refer to the indoor air conditioner manul.
Connecting method: Flared joint
C. Pipe spec and the torque
Diameter Thickness Torque
Ø1/4(6.35) 3/95"(0.8) 126~152Ib.in(14.2~17.2N.m)
Ø3/8"(9.52) 3/95"(0.8) 289~353Ib.in(32.7~39.9N.m)
Ø1/2"(12.7) 1/25"(1.0) 438~534Ib.in(49.5~60.3N.m)
Ø5/8"(15.88) 1/25"(1.0) 547~667Ib.in(61.8~75.4N.m)
Branch pipe
Outdoor unit type
Branch pipe selection:
total indoor capacity(1000Btu) Model (optional)
less than 114.3 FQG-B335A
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