Restrictions On Refrigerant Piping Lengths - Mitsubishi Electric PEFY-P-VML-E Data Book

1. Restrictions on refrigerant piping lengths

1 PUHY-P200~P650(8HP~26HP)
PUY-P200~P350(8HP~14HP)
Outdoor unit
A
First branch
(branch joint)
Notes: 1. No further branching in the pipes is possible after the header branch.
2. When cooling operation is performed when the outdoor temp. is 0˚C or lower : H'= 4m or less.
3. Equivalent pipe length (m) : Actual pipe length + A ✕ number of bent.
Table A
Outdoor unit model
Total pipe length
Furthest pipe length (L)
Furthest pipe length (r) after
first branch
Btwn. indoor &
outdoor units
Btwn. indoor & indoor units
B
C
e
Branch joint
Indoor
unit
A Outdoor unit model
P200 0.35 P450
P500
P250 0.42
P300 0.42 P550
P350 0.47 P600
P400 0.50 P650
Pipe section
Item
A+B+C+D
+a+b+c+d+e+f+g
A+C+D+g or A+B+d
C+D+g or B+d
Outdoor unit
installed above
Outdoor unit
installed below
a b
Indoor
Indoor
unit
unit
L
r
D
f
Indoor
unit
A
0.50
0.50
0.50
0.50
0.50
Allowable length
300m max.
150m max
40m max.
H 50m max.
40m max.
H'
h 15m max.
2- 2
Branch header
d
c
Indoor
unit
Indoor
unit
h
g
Indoor
unit
Equivalent length
–
175m max.
40m max.
–
–
–