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1-9. System Limitations
Table 1-11 System Limitations
Max. No. allowable connected outdoor units
Max. capacity allowable connected outdoor
units
Max. connectable indoor units
Max. allowable indoor/outdoor capacity ratio
*1: In the case of 18 ton (63.3kW) or smaller units, the number is
limited by the total capacity of the connected indoor units.
*2: Up to 3 units can be connected if the system has been extended.
*3: It is strongly recommended that you choose the unit so the load
can become between 50 and 130%.
Table 1-12 System Limitations of Total Refrigerant Amount
Combination number of outdoor unit
Upper limit
Make sure the values calculated using the following formula should not exceed the maximum allowable values (Table 1-12).
Total refrigerant amount = Refrigerant charge amount at shipment (for outdoor unit)
CAUTION
Always check the gas density limit for the room in which the unit is installed.
WARNING
1-10. Check of Limit Density
When installing an air conditioner in a room, it is necessary to ensure that even if the refrigerant gas accidentally leaks out, its
density does not exceed the limit level for that room.
00_302411_EN.indd 11
3
*2
360,000 BTU/h
(30 ton, 105.5 kW)
64
*1
50 – 200 %
1
g
oz (
)
1,763 (50,000)
+ Necessary amount of additional refrigerant charge per ft. (or per meter) according to liquid tubing size
+ Necessary amount of additional refrigerant charge per outdoor unit
+ Necessary amount of additional refrigerant charge for all indoor unit cooling capacity
Maximum number of connectable indoor units
when connected with minimum capacity
Total system
Number of
tonnage
indoor units
6
8
*3
10
12
2
3
2,821 (80,000)
3,703 (105,000)
11
Total system
Number of
tonnage
indoor units
20
14
45
25
16
50
32
18
55
39
20~30
64
2018/7/4 13:27:17
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