Hitachi YUTAKI S Series Technical Catalogue page 106

8 Refrigerant and water piping
Refrigerant circuit
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Minimum area requirements
In case of total refrigerant amount ≥1.84 kg, the unit should be installed, operated and stored in a room with a floor area
larger than the minimum criteria. Use following graphic and table to determine these minimum criteria:
Refrigerant Minimum Area
Amount (kg) (m ) (H:2.2m)
2
1.84 28.81
1.9 30.72
2.0 34.09
2.1 37.53
2.2 41.19
2.3 45.02
2.4 49.02
2.5 53.19
2.6 57.53
2.7 62.04
2.8 66.72
2.9 71.58
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N O T E
In case of not achieving the minimum floor area, contact with your dealer.
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Refrigerant piping size
Piping connection size of outdoor unit & indoor unit
Piping
Model
length
Gas pipe
2HP 3~50m
Ø 12.7 (1/2")
2.5HP 3~50m
3~27m Ø 15.88 (5/8") (*)
3HP
27~40m Ø 15.88 (5/8")
?
N O T E
(*): The refrigerant gas and liquid piping size for 2/2.5/3HP are different between outdoor and indoor unit, so refrigerant pipe adapters are
required. These pipe adapters are factory supplied with the outdoor unit:
Model
2 HP Ø15.88→Ø12.7
2.5 HP Ø15.88→Ø12.7
3.0 HP
98 TCGB0123 rev.2 - 10/2019
100
90
80
70
60
50
40
30
20
10
0
1.8
Outdoor unit
Pipe Connection size
Liquid pipe
Ø 6.35 (1/4")
Ø 9.52 (3/8") (*)
Ø 9.52 (3/8")
Pipe adapter
Gas pipe Liquid pipe
-
Ø9.52→Ø6.35
Ø9.52→Ø6.35 (x2)
-
1.9 2.0 2.1 2.2 2.3
Total refrigerant amount in the system (kg)
Refrigerant pipe
(Between Outdoor unit and
Indoor unit)
Gas pipe Liquid pipe
Ø 12.7 Ø 6.35
Ø 15.88 Ø 6.35
Ø 15.88 Ø 9.52
2.4 2.5 2.6 2.7 2.8
Indoor Unit
Pipe Connection size
Gas pipe Liquid pipe
Ø 6.35 (1/4")
Ø 15.88 (5/8") (*)
Ø 9.52 (3/8") (*)
Ø 15.88 (5/8") Ø 9.52 (3/8") (*)
Ø 15.88 (5/8") Ø 9.52 (3/8") (*)
2.9