Mitsubishi Electric PWFY-P100VM-E-BU Data Book page 84

(2) WCB piping design
H H1
h1
Item
Total piping length
Farthest IU from OU
Distance between OU and WCB
Distance between IU and WCB
Height between IU and OU
Height between IU and WCB
Height between indoor units
*1. Refer to Fig. (2)-1 "Restrictions on piping length" .
*2. Please refer to Fig. (2)-2 "Distance between WCB and farthest Indoor unit" when the distance between WCB controller and farthest indoor unit exceeds 40 m.
(Not applicable to the P250 model indoor unit).
*3. The values in the parenthesis show the maximum piping length when the capacity of the connected indoor unit is 200 or more.
NOTE:
Joint branching is not possible after header branching.
Cover the unused branch using the optional cover cap (CMY-S202-J).
Top-bottom differential 90m(OU above IU) or 60m(OU below IU) is not available.
PURY-(E)P200,250YLM-A(1)
1000
900
800
700
600
500
400
300
200
10 20 30
Distance between outdoor unit and WCB(m)
PURY-(E)P300, 350YLM-A(1)
1000
900
800
700
600
500
400
300
200
10 20 30
Distance between outdoor unit and WCB(m)
PQRY-P200,250,300YHM-A
1000
900
800
700
600
500
400
300
200
10 20 30 40 50 60 70 80 90 100 110
Piping length between outdoor unit and WCB(m)
Fig.(2)-1 Restrictions on piping length
OU
L1
A
WCB
Indoor/
PWFY branch
PWFY branch
C
D E
Line branch
d e
(Header branch
possible)
IU
IU
A+B+C+D+E+a+b+c+d+e+f+g
O U a b o e v U I
O U b e o l w U I
40 50 60 70 80 90 100 110
40 50 60 70 80 90 100 110
B
L2
a
g
f
BU
IU AU
Piping in the figure
A+C+D+E+g / A+B+c
A
C+D+E+g / B+c
H
H 1
h1
h2
70
60
50
40
30
20
10
0
0 5
Height difference between WCB
and farthest indoor unit (m)
Fig.(2)-2 Distance between WCB and fartherest indoor unit
Table (2)-1. Piping "B", "C", "D", "E" size selection rule
Total capacity of indoor units
-140
14 - 200
201 - 300
301 - 400
401 -
Table (2)-2. Piping "a", "b", "c", "d", "e", "f", "g" size selection rule
Model number
20,25,32,40,50
63,71,80,100,125,140
200
250
Table (2)-3. Selection rule for branch pipe (joint)
Downstream unit model total
-200
201 - 400
401 -
Table (2)-4. Selection rule for branch pipe (header)
4-Branching header 8-Branching header
(Downstream unit (Downstream unit
model total 200) model total
CMY-Y104-G
- 76 -
(Line branch
Header branch
possible)
Capped
b c
AU
AU
h2
Maximum length
*1
165 m
(Max. equivalent length of 190 m or less)
1 1 0
*2
40
5 0
4 0
*3
15 (10)
*3
15 (10)
10 15
(mm)
Liquid pipe Gas pipe
ø9.52 ø15.88
ø9.52 ø19.05
ø9.52 ø22.2
ø12.7 ø28.58
ø15.88 ø28.58
Liquid pipe Gas pipe
ø 6.35 ø 12.7
ø 9.52 ø 15.88
ø 9.52 ø 19.05
ø 9.52 ø 22.2
Joint
CMY-Y102S-G2
CMY-Y102L-G2
CMY-Y202-G2
10-Branching header
(Downstream unit
400) model total
CMY-Y108-G CMY-Y1010-G
(mm)
650)