Hitachi YUTAKI S80 Series - 9 R E F R I G E R a N T a N D W a T E R P I P I N G; Refrigerant Circuit; Refrigerant Piping

9. Refrigerant and water piping
TCGB0075 rev.0 - 11/2012
98
9.1 Refrigerant circuit
9.1.1 Refrigerant piping
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Refrigerant piping length between indoor unit and outdoor unit
The refrigerant piping length between indoor unit and outdoor unit should be designed using the following chart.
Keep the design point within the area of the chart, which is showing the applicable height difference according to piping
length.
Setting
before
shipment
When outdoor
unit is installed
higher than
indoor unit
When outdoor
unit is installed
lower than indo-
or unit
Height difference
(m)
Total length between outdoor unit
and indoor unit.
DSW2 RAS-(4-6)H(V)NME-AF
40
Item (4-6)HP
Maximum piping length between outdoor unit and
indoor unit (Lmax)
Actual piping length 30 m
Equivalent piping length 40 m
Minimum piping length between outdoor unit and
indoor unit (Lmin)
Actual piping length 3 m
Maximum height difference between indoor and
outdoor unit (H)
Outdoor unit higher than indoor unit 30 m
Indoor unit higher than outdoor unit 20 m
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Refrigerant piping size
Piping connection size of outdoor unit & indoor unit
Outdoor unit
Pipe size
Indoor Unit
Pipe size (*)
Gas pipe Liquid pipe Gas pipe Liquid pipe
RAS-4H(V)RNME-AF Ø 15.88 (5/8”) Ø 9.53 (3/8”) RWH-4.0FS(V)NFE Ø 15.88 (5/8”) Ø 9.53 (3/8”)
RAS-5H(V)RNME-AF Ø 15.88 (5/8”) Ø 9.53 (3/8”) RWH-5.0FS(V)NFE Ø 15.88 (5/8”) Ø 9.53 (3/8”)
RAS-6H(V)RNME-AF Ø 15.88 (5/8”) Ø 9.53 (3/8”) RWH-6.0FS(V)NFE Ø 15.88 (5/8”) Ø 9.53 (3/8”)
N O T E
(*)Regerantliquid/gaspipingaccessoryisfactorysupplied.