Mitsubishi Electric PEFY-P-VML-E Data Book page 126

4 PURY-P400·450·500·550·600·650 (16·18·20·22·24·26HP)
Outdoor unit
H
H'
h
1
(Models 200, 250)
h
2
Item
Total pipe length
Furthest pipe length
Length
Outdoor-BC (Master)
BC(Master or Slave)-Indoor
Indoor
-Outdoor
Height
Indoor-BC (Master, Slave)
difference
Indoor-Indoor
BC (Master)-BC (Slave)
To connect indoor units in a system with branching nodes of more
than 16, two to three branch controllers are required, and three pipes
are required to connect the BC controller and the indoor units.
Equivalent pipe length : Allowable pipe length + A ✕ number of bent
✻1 When connecting indoor units that are P200-type or above, the allowable pipe length between indoor units and between
indoor units and the BC controller must be less than 10m.
✻2 When the total extended length exceeds 300m, refer to the figure below, restrictions on refrigerant piping.
✻3 When the piping length between the BC controller and the farthest indoor unit exceeds 40 m, refer to the figure below for
restrictions on refrigerant piping length. (except for P200-type or above indoor units)
✻4 When connecting indoor units that are P200-type or above, do not use branch joints or branch headers.
✻5 Do not connect P200-type or above indoor units to other indoor units with different capacities at the same branch node.
✻6
When connecting two BC controller sub units, include the length of the lines to these units in the allowable and equivalent
lengths in the table above.
✻2 Restrictions on refrigerant piping
400
350
300
250
200
30
A
BC controller (Master)
b
a
indoor 1
indoor
2
(Models 141 to 250)
Pipe section
A+B+C+a+b+c+d+e
A+C+e
A
B+d or C+e
Higher outdoor H
Lower outdoor
H'
h
1
h
2
h
3
40 50 60 70 80 90 100 110
Distance between outdoor unit and
BC controller (m)
2- 5
Note: Connecting indoor units
141-250 capacity index.
Gas pipe
C
BC controller (Slave)
Branch pipe
CMY-Y-102S-G
B
c d
indoor indoor
3 4
Max.3 sets indoor units to 1 connection.
Total capacity 140 and below
Allowable length
300m max. ✻2
150m max.
110m max.
40m max. ✻3
50m max.
–
15m (10m) max.
15m (10m) max. ✻1
15m (10m) max. ✻1 ✻6
Table A
Outdoor unit model
P400
P450
P500
✻3 Branch pipe length and height difference
between BC controller and indoor unit (A)
70
60
50
40
30
20
10
0
0 5
Height difference between the main
BC controller and farthest indoor unit (m)
Liquid
pipe
h
3
e
h
1
indoor
5
Equivalent length
–
175m max.
110m max.
40m max. ✻3
–
–
–
–
–
A Outdoor unit model A
0.50 P550 0.50
0.50 P600 0.50
0.50 P650 0.50
10 15