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[ II Restrictions ]
[6] Restrictions on Pipe Length
P250 model
OU
A
Piping length
Item
Farthest IU from OU (L1)
Height between OU and IU (OU above IU)
Height between OU and IU (OU under IU)
OU: Outdoor Unit, IU: Indoor Unit
Bent equivalent length "M"
Outdoor Model
M (m/bent [ft./bent])
PUHY-P250YJM
Piping "A" size selection rule
Outdoor
PUHY-P250YJM
*1. A>=90m [295ft.], ø12.70mm [1/2in.]
Indoor unit piping size selection rule
Indoor Unit size
P250
P300-F *2
*2. "-F" indicates Fresh air intake type
HWE10190
IU
L1
Piping in the figure
A
H
H'
0.42 [1.38]
Pipe(Liquid)
ø9.52 [3/8"] *1
ø22.20 [7/8"]
Pipe(Liquid)
ø9.52 [3/8"]
ø22.20 [7/8"]
ø9.52 [3/8"]
ø22.20 [7/8"]
Note1. If the A/C system is designed to use cooling mode under outdoor temperature 0°C, H'<=15m.
Note2. As bents cause pressure loss on transportation of refrigerant, fewer bents design is better;
Piping length needs to consider the actual length and equivalent length which bents are counted.
Equivalent piping length (m)=Actual piping length+"M" x Quantity of bent.
IU : Indoor unit , OU : Outdoor unit
(m [ft.])
Max. length
Max. equivalent length
165 [541']
190 [623']
50 [164']
-
40 [131']
-
(mm [in.])
Pipe(Gas)
(mm [in.])
Pipe(Gas)
- 34 -
GB
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