14-2.Wcb Piping Design - Mitsubishi Electric City Multi PWFY-P100VM-E-BU Data Book

14. PIPING DESIGN
14-2. WCB piping design
OU/HU
A
Indoor/
PWFY branch
H H1
C
h1
Line branch
(Header branch
possible)
Item
Total piping length
Farthest IU from OU/HU
Distance between OU/HU and WCB
Distance between IU and WCB
Height between IU and OU/HU
Height between IU and WCB
Height between indoor units
*1. Refer to Fig. (A) "Restrictions on piping length".
*2. Please refer to Fig. (B) "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
PURY-(E)P200-300YNW
1000
900
800
700
600
500
400
300
200
10 20 30 40
Distance between outdoor unit and WCB(m)
PURY-(E)P300, 350YLM
1000
900
800
700
600
500
400
300
200
10 20 30 40
Distance between outdoor unit and WCB(m)
PQRY-P200,250,300YLM
1000
900
800
700
600
500
400
300
200
10 20 30 40 50 60 70 80 90 100 110
Piping length between heat source unit and WCB(m)
Fig. (A) Restrictions on piping length
MEES19K013
L1
WCB
B
PWFY branch
L2
D E
g
d e f
IU IU AU
IU
Piping in the figure
A+B+C+D+E+a+b+c+d+e+f+g
A+C+D+E+g/A+B+c
C+D+E+g/B+c
OU/HU above IU
OU/HU below IU
50 60 70 80 90 100 110
50 60 70 80 90 100 110
(Line branch
Header branch
possible)
Capped
a c
b
AU
BU AU
h2
(Max. equivalent length of 190 m or less)
A
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. (B) Distance between WCB and fartherest indoor unit
Piping "B", "C", "D", "E" size selection rule
Total capacity of indoor units
–140
14–200
201–300
301–400
401–
Piping "a", "b", "c", "d", "e", "f", "g" size selection rule
Model number
15, 20, 25, 32, 40, 50
63, 71, 80, 100, 125, 140
200
250
Selection rule for branch pipe (joint)
Downstream unit model total
– 200 CMY-Y102SS-G2
201 – 400 CMY-Y102LS-G2
401 –
CMY-Y202S-G2
Selection rule for branch pipe (header)
For PURY-Series
4-Branching header 8-Branching header
(Downstream unit (Downstream unit
model total 200) model total
CMY-Y104-G CMY-Y108-G
For PQRY-Series
4-Branching header 8-Branching header
(Downstream unit (Downstream unit
model total 200) model total
CMY-Y104-G CMY-Y108-G
AIR TO WATER
Maximum length
*1
165 m
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
(mm)
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
10-Branching header
(Downstream unit
400) model total 650)
CMY-Y1010-G
10-Branching header
(Downstream unit
350) model total 600)
CMY-Y1010-G
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