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46
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 2m(6.56ft) 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
≤
0.44kg/m
3
(0.028lbs/ft
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 in-
door unit performance may be caused.
• The total amount of refrigerant can be added up to 15%.
!
Refrigerant charging
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