Mitsubishi Heavy Industries SRK25GZ-L1 Handbook page 691

Height and length restrictions for refrigerant piping
Models FDC508HES3
Outdoor unit Indoor unit
ra
L
A
rb
In the illustration the L is main piping and ra, andrb are branch piping.
(1) For the branch be sure to select the specified branch pipe set (sold separately) and then to follow the directions
Request
of the instruction manual included in the branch pipe set when installing the piping. Be sure to install the branch
piping so that the branch is level.
Models FDC808, 1008HES3
(Twin type)
Outdoor unit Indoor unit
ra
L
A
rb
(Double-twin type)
Outdoor unit Indoor unit
rd
rc
rb
ra
A
r1 rA rA
L
rB
rC
r2
rD
In the illustration the L is main piping and ra,rb,rc, andrd are branch piping.
(1) When the capacity of the indoor unit to be connected is 208 or less, be sure to use a pipe diameter of ø9.52 for the
Request
size of the liquid piping of branch piping (between branch and indoor units). (for twin, triple, and double-twin
only) For connections to indoor units (liquid piping side dia. ø6.35) use the different diameter adapter coupling
that is included in the branch piping kit.
(2) For the branch be sure to select the specified branch pipe set (sold separately) and then to follow the directions of
the instruction manual included in the branch pipe set when installing the piping. Be sure to install the branch
piping so that the branch is level.
• One-way pipe length (m)
• Branch pipe length (m)
• Vertical height difference between outdoor unit and indoor unit
B
Outdoor unit is higher Max. 30m
Outdoor unit is lower Max. 15m
• Difference in higher between indoor units Max. 1m
(Triple type)
Outdoor unit
L
B
• One-way pipe length (m)
• Branch pipe length (m)
B
C
D
• Vertical height difference between outdoor unit and indoor unit
Outdoor unit is higher Max. 30m
Outdoor unit is lower Max. 15m
• Difference in higher between indoor units Max. 4m
< =
L +ra +rb 50
< =
lra – rbl 10, ra 30, rb 30
Indoor unit
ra
A
rb
B
rc
C
< =
L + ra 50, L+rb 50, L+rc 50, L+rd 50
< =
lra – rbl 10, lra – rcl 10, lrb – rcl 10
< =
lra – rdl 10, lrb – rdl 10, lrc – rdl 10
< = < =
ra 30, rb 30, rc 30, rd 30
< =
rA +rB 15, rC +rD 15
V MULTI
< = < =
< = < = < =
< = < =
< = < =
< = < =
< =
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