Mitsubishi Heavy Industries FDTC40ZIXVD Data Book page 155

Limitation on unit and piping installation - single,twin,Double twin.
Descriptions
One-way pipe length
Main pipe length
One-way pipe length after the first branching point
Difference of pipe length after the first branching point
Total pipe length after the second branching point
Elevation difference between indoor and outdoor units
Elevation difference among indoor units
Single type
Indoor unit
Outdoor unit
H
(1) A riser pipe must be part of the main.
A branching pipe set should be installed horizontally at a point as close to an indoor unit as possible.
(2) Reduce refrigerant amount by according to table below from factory charge when refrigerant piping is shorter than 3m.
Model for outdoor units
71V・100V・125V・140V・200V・250V
Model for outdoor units
40V・50V・60V
71V・100V・125V・140V
200V Liquid piping
200V・250V Cas piping
71V・100V・125V・140V
200V Liquid piping
200V・250V Cas piping
71V
100V・125V・140V
200V・250V
When the outdoor unit is
positioned higher
When the outdoor unit is
positioned higher
Twin type
H
L1
L
Outdoor unit
refrigerant to be reduced
-1.0kg
Dimensional limitations
≦ 30m
≦ 50m
φ9.52 ≦ 40m
φ12.7
≦ 70m
φ25.4 or φ28.58
φ22.22 ≦ 35m
≦ 50m
φ9.52 ≦ 40m
φ12.7
≦ 70m
φ25.4 or φ28.58
φ22.22 ≦ 35m
≦ 20m
≦ 30m
≦ 10m
≦ 15m
≦ 20m
40V・50V・60V
≦ 30m
71V~250V
≦ 20m
40V・50V・60V
≦ 15m
71V~250V
≦ 0.5m
h
Indoor unit
L2
Twin type
L(riser) Model for Branch piping
outdoor units set(option)
71V・100V
DIS-WA1
125V・140V
200V・250V DIS-WB1
Marks appearing in the drawing
Single type Twin type Double-Twin type
L
L+L1+L2
L+L1
L+L2
L
L1, L2
La+L1, La+L2, Lb+L3, Lb+L4
L1-L2, L2-L1, L3-L4, L4-L3
L1-L2
(L1+La)-(L3+Lb), (L1+La)-(L4+Lb)
L2-L1
(L2+La)-(L3+Lb), (L2+La)-(L4+Lb)
L1+L2, L3+L4
H H
h h1, h2, h3, h4, h5, h6
Double-Twin type
h2
h1
Indoor unit
h3
L1
Indoor unit
h4
L2
H
L3
Second Branch
La
First Branch
L (riser)
Outdoor unit
Double-Twin type
Model for Branch piping set(option)
outdoor units
First Branch
200V・250V DIS-WB1
L+La+L1
L+La+L2
L+Lb+L3
L+Lb+L4
L
H
Indoor unit
h6
h5
L4
Lb
Second Branch
DIS-WA1 × 2