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Installation Manual 43
ENGLISH
Pipe connections between indoor and outdoor unit
WARNING
▶ Regulation for refrigerant leakage
: the amount of refrigerant leakage should satisfy the following equation for human safety.
p If the above equation can not be satisfied, then follow the following steps.
- Selection of air conditioning system: select one of the next
1. Installation of effective opening part
2. Reconfirmation of Outdoor Unit capacity and piping length
3. Reduction of the amount of refrigerant
4. Installation of 2 or more security device (alarm for gas leakage)
- Change Indoor Unit type
: installation position should be over 6.6ft 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
Total amount of refrigerant in the system
≤ 0.44(kg/m
3
(0.028 (lbs/ft³))
Volume of the room at which Indoor Unit of the least capacity is installed
- Add exact amount of refrigerant calculated by the installation pipe diameter length and the indoor combination.
- If the refrigerant amount is not exact, it may not operate properly.
-
If additionally bottled refrigerant amount is over ±10%, condenser burning or insufficient indoor unit performance may be caused.
Liquid pipe
Gas pipe
Common pipe
Ⓐ Manifold Gauge
Ⓑ Low pressure side Handle
Ⓒ High pressure side Handle
Refrigerant Charging
WARNING
- Pipe to be vacuumed : gas pipe, water pipe, common pipe
- If the refrigerant amount is not exact, it may not operate properly.
- If additionally bottled refrigerant amount is over ±10%, condenser burning or insufficient indoor unit per-
formance may be caused.
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