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1-10. Installation Standards
Relationship between A/C units and refrigerant tubing
Outdoor unit
Suction tube
Discharge tube
Liquid tube
Balance tube
Suction tube
Discharge tube
Liquid tube
Gas tube
Liquid tube
Outdoor unit
Indoor unit
Solenoid
valve kit
4-tube layout
3-tube layout
2-tube layout
●
Install the solenoid valve kit 164 ft. (50m) or less from the indoor unit.
●
In quiet locations such as hospitals, libraries, and hotel rooms, the refrigerant noise may be somewhat noticeable. It is
recommended that the solenoid valve kit be installed inside the corridor ceiling, at a location outside the room.
●
The solenoid valve kit must be located not less than 8.2 ft. (2.5m) above the floor or that cannot be touched.
Strongly recommended installation
Hallway
Room
Indoor unit
Room
Indoor unit
Room
Indoor unit
Room
Indoor unit
Solenoid
valve kit
Solenoid
valve kit
Hallway
Avoid
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
Capacity of indoor unit
160
Type 24 - 54
56
Type 18 or under
●
If the capacity range is exceeded, use 2 solenoid valves connected in parallel.
WARNING
CAUTION
Always check the gas density limit for the room in which the unit is installed.
1-11. 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.
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