Installation; Pipe Length - Hitachi RAM-130QH5 Service Manual

INSTALLATION

PIPE LENGTH

(1) Total 45m maximum pipe length for each refregrant cycle (upper cycle and lower cycle).
(2) Pipe length for one indoor unit : maximum 25m.
Outdoor unit
(L1 + L2 + L3) = (L4 + L5 + L6) = Maximum 45m
Minimum piping length for each indoor unit is 5m.
Maximum piping length for one indoor unit is 25m.
Hight Difference between indoor units should be not more than 5m
Outdoor unit
To the outdoor unit, up to three indoor units can be connected until the total value of
capacity from 5.0kW to 9.0kW for each refregrant cycle (upper cycle and lower cycle).
Make sure to connect to two or three indoor units for each refregerant cycle.
Indoor unit 1
Indoor unit 2 Indoor unit 3
L1
L2
Indoor unit 2 Indoor unit 3
Indoor unit 1
Indoor unit 4
L3
Indoor unit 4
– 13 –
Indoor unit 5 Indoor unit 6
L4
L5
Indoor unit 5 Indoor unit 6
L6