Mitsubishi Electric PQHY-P250YHM-A, Data Book

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(2) PFD-P500VM-E (two refrigerant circuit system)
Table: I V - 1 - ( 2 ) - 2 . Bent equivalent length "M"
M (m/bent) Outdoor Model
PQHY-P250 0.42
Table: I V- 1 - ( 2 ) - 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 - ( 2 ) - 3 . Piping "A" size selection rule
(mm)
Indoor Unit size Pipe(Gas) Pipe(Liquid)
P500 ø22.20 ø9.52
Table: IV-1-(2)-4. Indoor unit piping size selection rule
PUHY-P250 ø22.20 ø9.52 *1
PUHY-P250 0.42
IU: Indoor unit, OU: Outdoor unit, HU: Heat source unit
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.
L
L
A
OU OU
L
L
A
Fig.IV-1-(2)A: PUHY Piping Design
H (OU abo
v
e
IU)
H' (OU under IU)
Fig.IV-1-(2)B: PQHY Piping Design
H (HU ab
o
v
e IU)
H' (HU under IU)
HU HU
IU IU