Hitachi RAS-070HNBRMQ2 - Combination of Indoor Unit and Outdoor Unit

2.4 Combination of Indoor Unit and Outdoor Unit
8
The range of the connectable indoor unit capacity ratio is 50%~130%.
Outdoor Unit Type
Rated
Capacity
(kW)
Min. Total Capacity
of the indoor units
can be connected
(kW)
Max. Total Capacity
of the indoor units
can be connected
(kW)
indoo
Numb
r
ers
units
of
can
the
be
connected(Q’ty)
Min. Capacity
at Individual
Operation (kW)
070
20.0
10.0 26.0
1(*1)~13
1.8
080
22.4 11.2 29.1
1(*1)~13
1.8
090
25.0 12.5 32.5
1(*1)~13
1.8
100 28.0 14.0 36.4
1(*1)~16(*2)
1.8
110
31.0 15.5 40.3
1(*1)~19(*2)
1.8
120
33.5 16.8
43.5
1(*1)~19(*2)
1.8
NOTE:
(1) It is suggested that the total capacity of indoor units which are operated simultaneously should not
exceed the capacity of outdoor units under the following conditions. Otherwise, there is a decrease in
operating performance.
 When there are some round-way cassette indoor units and high wall indoor units in the system;
 When the outdoor air temperature is 43° C or more during the outdoor unit cooling operation;
 When the outdoor air temperature is lower than -10°C during the outdoor unit heating operation.
(2) For the same system, if the connectable indoor unit capacity ratio is over than 100%, and which all
the indoor uni
ts operate simultaneously, capacity of every indoor unit should be less than its rated
capacity.
Connectable Indoor Unit Capacity Ratio = Total Indoor Unit Capacity / Total Outdoor Unit Capacity.
The number of indoor units that can be connected to an outdoor unit is defined in the following table:
*The connectable indoor unit capacity ratio can be calculated as follows:
* 1 When only one indoor unit is connected, the connectable indoor unit capacity ratio must be 100%.
* 2 To ensure the heating performance in winter, the recommended number of the connectable indoor units should
not exceed 13. If it exceeds, please contact your distributor or dealer.