Hitachi RAF-25NH4 Données Techniques page 74

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Height difference
RAM-70QH4
Height difference between indoor units
should be not more than 5m.
Indoor unit Indoor unit Indoor unit
Outdoor unit
RAM-80QH4
Height difference between indoor units
should be not more than 5m.
Indoor unit Indoor unit Indoor unit Indoor unit
Outdoor unit
RAM-70QH4
Outdoor unit
(Within
±10m)
Maximum piping length for one indoor unit is 25m.
* Additional charge of refrigerant is not required.
RAM-80QH4
Outdoor unit
(Within
±10m)
Maximum piping length for one indoor unit is 25m.
* Additional charge of refrigerant is not required.
72
Piping length
Indoor unit 1 Indoor unit 2 Indoor unit 3
L
1
L + L + L = Maximum 60m
1 2 3
(However, L + L = Maximum 35m)
1 2
Indoor unit 1 Indoor unit 2
L
L
1
2
( L + L ) = ( L + L ) = Maximum 35m
1 2 3 4
L L
2 3
Indoor unit 3 Indoor unit 4
L
L
4
3