Mitsubishi Heavy Industries FDTC50ZHXV Technical Manual page 356

Model 250 only
Outdoor unit Indoor uni
a
L1
r
A
b
L2
r
r
Note(1) The unit that requires the longest
one-way piping length should be
connected to thera piping line.
The Indoor_outdoor piping length differences among indoor units are 3m or more.
Models 140, 200 only
Outdoor unit Indoor uni
a
L1
r
A
b
L2
r
r
Note(1) The unit that requires the longest
one-way piping length should be
connected to thera piping line.
Double-twin type
Outdoor unit Indoor unit
A
L
r1 rA rA
rB
rC
r2
In the illustration the L is main piping and r1,r2,rA,rB,rC andrD are branch piping.
(1) When 40-60 models of indoor units are applied to V-multi usage, be sure to use the liquid piping size ø9.52mm
Request
for the piping between branch and indoor unit. (for double-twin type only)
For the connections to the indoor units, be sure to reduce the liquid piping size to ø6.35mm just before the indoor
unit by using reducer included in the branch piping kit as optional part.
(2) Regarding the branching, be sure to use the specified branch piping kit as optional part and install it to have a
level or perpendicular position according to the description of instruction manual attached to the branch piping
kit.
t
Model 250
One-way pipe length (m) L1 +ra 70, L1 + L2 + rb 70, L1 + L2 +rc 70
B
c
Branch pipe length (m)
C
Difference in height between indoor units (m) h1=0.5 or less, h2=0.5 or less, h3=0.5 or less
Note(2) In case of model 250, the application that the indoor_outdoor piping length
Model 140
t
One-way pipe length (m) L1 + L2 +ra +rb +rc
Branch pipe length (m)
B
Difference in height between indoor units (m) h1=0.5 or less, h2=0.5 or less, h3=0.5 or less
c
C
Model 200
One-way pipe length (m) L1 +ra 70, L1 + L2 +rb 70, L1 + L2 +rc 70
Branch pipe length (m)
Difference in height between indoor units (m) h1=0.5 or less, h2=0.5 or less, h3=0.5 or less
B
C
D
rD
Models 200, 250
One-way pipe length (m) L +r1 +rA
Branch pipe length (m)
Difference in height between indoor units (m) h1=0.5 or less, h2=0.5 or less
ra – (L2 +rb) < 3,ra – (L2 +rc) I < 3, Irb –rc I < 3
ra 30, L2 +rb 30, L2 +rc 30, L2 5
differences among indoor units are 3m or more is prohibited.
3 ra – (L2 +rb) 10, 3 ra – (L2 +rc) 10, Irb –rc I 10
ra 30, L2 +rb 27, L2 +rc 27, L2 5
3 ra – (L2 +rb) 10, 3 ra – (L2 +rc) 10, Irb –rc I 10
ra 30, L2 +rb 27, L2 +rc 27, L2 5
L +r2 +rD
rA –rB
(r1 +rA) – (r2 +rC)
(r1 +rB) – (r2 +rC)
r1 +rA
rA +rB
346
- -
50
70, L +r1 +rB 70, L +r2 +rC
70
10, rC –rD 10
10, (r1 +rA) – (r2 +rD)
10, (r1 +rB) – (r2 +rD)
30, r1 +rB 30, r2 +rC
15, rC +rD 15
h3=0.5 or less, h4=0.5 or less
h5=0.5 or less, h6=0.5 or less
70,
10
10
30, r2 +rD 30