Hitachi YUTAKI RWM-2R1E - Page 66

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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 oor area larger than
the minimum criteria. Use following graphic and table to determine these minimum criteria:
Refrigerant
Amount (kg)
Minimum Area
(m
2
) (H:2.2m)
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
Minimum room area for installation (m
2
)
0
10
20
30
40
50
60
70
80
90
100
1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 2.62.7 2.82.9
Total refrigerant amount in the system (kg)
? NOTE
In case of not achieving the minimum oor area, contact with your dealer.
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Refrigerant piping size
Piping connection size of outdoor unit & indoor unit
Outdoor unit Refrigerant pipe Indoor Unit
Model Piping length
Pipe Connection size
(Between Outdoor unit and
Indoor unit)
Pipe Connection size
Gas pipe Liquid pipe Gas pipe Liquid pipe Gas pipe Liquid pipe
2HP 3~50m
Ø 12.7 (1/2”) Ø 6.35 (1/4”) Ø 12.7 Ø 6.35 Ø 15.88 (5/8”) (*)
Ø 6.35 (1/4”)
2.5HP 3~50m Ø 9.52 (3/8”) (*)
3HP
3~27m Ø 15.88 (5/8”) (*) Ø 9.52 (3/8”) (*) Ø 15.88 Ø 6.35 Ø 15.88 (5/8”) Ø 9.52 (3/8”) (*)
27~40m Ø 15.88 (5/8”) Ø 9.52 (3/8”) Ø 15.88 Ø 9.52 Ø 15.88 (5/8”) Ø 9.52 (3/8”) (*)
? NOTE
(*): 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
Pipe adapter
Gas pipe Liquid pipe
2HP Ø15.88→Ø12.7 -
2.5HP Ø15.88→Ø12.7 Ø9.52→Ø6.35
3.0HP
-
Ø9.52→Ø6.35 (x2)
REFRIGERANT AND WATER PIPING
PMML0575 rev.2 - 03/2022
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