42
PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT
ENGLISH
WARNING
!
• Regulation for refrigerant leakage
: The amount of refrigerant leakage should satisfy the following equation for human safety.
If the above equation can not be satisfied, then follow the following steps.
• Selection of air conditioning system : select one of the next
- Installation of effective opening part
- Reconfirmation of Outdoor Unit capacity and piping length
- Reduction of the amount of refrigerant
- Installation of 2 or more security device (alarm for gas leakage)
• Change Indoor Unit type
: Installation position should be over 2 m from the floor. (Wall mounted type
→
Cassette type)
• Adoption of ventilation system
: Choose ordinary ventilation system or building ventilation system.
• Limitation in piping work
: Prepare for earthquake and thermal stress.
Liquid pipe
Gas pipe
Ⓐ
Manifold Gauge
Ⓑ
Low pressure side Handle
Ⓒ
High pressure side Handle
Total amount of refrigerant in the system
≤
0.44 ( kg / m
3
)
Volume of the room at which Indoor Unit of the least capacity is installed
WARNING
!
• Pipe to be vacuumed : gas pipe, liquid pipe
• If the refrigerant amount is not exact, it may not operate properly.
• If additionally bottled refrigerant amount is over 10 %, condenser burst or insufficient
indoor unit performance may be caused.
Refrigerant charging