Table 1-10-2 Necessary Amount of Refrigerant Charge Per Outdoor Unit
Further charge a certain amount listed below in addition to the amount of refrigerant charge.
CHDZ07263
CHDZR07263
42 oz/unit
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 20 hp (type 191.100 BTU/h) or smaller units, the number is limited by the total capacity of the connected indoor units.
1-10. Installation Standards
Relationship between A/C units and refrigerant tubing
4-tube layout
Outdoor unit
Suction tube
Discharge tube
Liquid tube
Balance tube
●
Install the solenoid valve kit 98 ft. or less from the indoor unit.
●
In quiet locations such as hospitals, libraries, and hotel rooms, the refrigerant noise may be somewhat notice-
able. It is recommended that the solenoid valve kit be installed inside the corridor ceiling, at a location outside
the room.
Room
Indoor unit
Hallway
Common solenoid valve kit
●
Multiple indoor units under group control can utilize a solenoid valve kit in common.
●
Categories of connected indoor unit capacities are determined by the solenoid valve kit.
Type of solenoid valve kit
160
56
●
If the capacity range is exceeded, use 2 solenoid valves connected in parallel.
CHDZ09663
CHDZR09663
42 oz/unit
Outdoor unit
Desirable
Room
Indoor unit
Solenoid
valve kit
Total capacity of indoor units (BTU/h)
19.000 < Total capacity < 54.600
7.500 < Total capacity < 19.000
3
288,000 BTU/h (30 hp, 84.3 kw)
*1
40
50 – 130 %
3-tube layout
Solenoid
valve kit
Suction tube
Discharge tube
Liquid tube
Undesirable
Room
Indoor unit
Hallway
11
2-tube layout
Indoor unit
Gas tube
Liquid tube
Room
Indoor unit
Solenoid
valve kit