Specifications

82
2. Piping Design
(1) PUHY-P250 Piping
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
Fig. 2-(1)-A Piping scheme
L1
A
OU
IU
H (OU above IU) H' (OU under IU)
Table2-(1)-2. Bent equivalent length "M"
M (m/bent [ft./bent])Outdoor Model
PUHY-P250 0.42 [1.38]
Table2-(1)-1. Piping length (m [ft.])
Max. length
Piping in the figureItem
Max. equivalent length
A
Height between OU and IU (OU above IU)
Height between OU and IU (OU under IU)
OU: Outdoor Unit, IU: Indoor Unit
190 [623']165 [541']Farthest IU from OU (L1)
H
H'
50 [164']
40 [131']
-
-
(mm [in.])
Outdoor Pipe(Gas)Pipe(Liquid)
PUHY-P250=CMY-Y102L-G2 ø22.20 [7/8"]ø9.52 [3/8"] *1
*1. A>=90m [295ft.], ø12.70mm [1/2in.]
Table2-(1)-3. Piping "A" size selection rule
(mm [in.])
Indoor Unit size Pipe(Gas)Pipe(Liquid)
P250, P300-F *2 ø22.20 [7/8"]ø9.52 [3/8"]
*2. "-F" indicates Fresh air intake type
Table2-(1)-4. Indoor unit piping size selection rule