Mitsubishi Electric PQHY-P250YHM-A, Data Book

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IV
Piping Design (PEFY-AF1200CFMR)
IV System Design
1. Piping Design
(1) PFD-P250VM-E
Note1. If the PUHY system is designed to use cooling mode under outdoor temperature 10°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 "M" x Quantity of bent.
IU: Indoor unit, OU: Outdoor unit, HU: Heat source unit
L
A
H (HU abo
v
e
IU)
H' (HU under IU)
Table: I V- 1 - ( 1 ) - 2 . Bent equivalent length "M"
M (m/bent) Outdoor Model
PQHY-P250 0.42
Table: I V- 1 - ( 1 ) - 1 . Piping length
(m)
Max. length Piping in the figure Item Max. equivalent length
A
Height between OU/HU and IU (OU/HU above IU)
Height between OU/HU and IU (OU/HU under IU)
OU: Outdoor Unit, IU: Indoor Unit, HU: Heat source Unit
190 165 Farthest IU from OU/HU (L)
H
H' 50
40 -
-
(mm)
Outdoor Pipe(Gas) Pipe(Liquid)
PQHY-P250 ø22.20 ø9.52 *1
*1. A>=90m, ø12.70mm
Table: I V- 1 - ( 1 ) - 3 . Piping "A" size selection rule
(mm)
Indoor Unit size Pipe(Gas) Pipe(Liquid)
P250 ø22.20 ø9.52
Table: I V- 1 - ( 1 ) - 4 . Indoor unit piping size selection rule
PUHY-P250 ø22.20 ø9.52 *1
PUHY-P250 0.42
Fig.IV-1-(1)A: PUHY Piping Design Fig.IV-1-(1)B: PQHY Piping Design
L
A
OU
H (OU abo
v
e
IU)
H' (OU under IU)
IU IU
HU