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When the multiple indoor units are arranged, in order to distinguish the connecting systems of indoor and outdoor units, all systems shall be named
respectively and recorded on the nameplate on the electronic control box cover of the outdoor unit.
6.4 Precautions against refrigerant leak
1) The refrigerant of the air conditioner is harmless and nonflammable.
2) The room for the air conditioner shall have an appropriate space. In case of refrigerant leak, it cannot go beyond the critical concentration. In addition,
necessary measures can be taken.
3
3) The critical gas concentration harmless to the human body is 0.3 kg/m .
4) Confirm the critical concentration according to the following steps and take corresponding measures.
a) Calculate the filling volume of refrigerant (A[kg])
Volume of refrigerant = filling volume of refrigerant before delivery (see the nameplate) + refilling volume of refrigerant corresponding to the
length of pipe
3
B) Calculate the indoor volume (B [m ]) (by the minimum volume)
≤
Critical concentration:0.3[Kg/m³]
A[kg ]
B[m³]
5) Measures against exceeding the critical concentration
a) To reduce the refrigerant concentration below the critical concentration, install a mechanical ventilation device (for frequent ventilation).
b) If frequent ventilation cannot be performed, please install a leak warning device interlinked with the mechanical ventilation device.
Indoor unit
a. Opening of ventilation
b. Leak warning device interlinked with the mechanical ventilation device
D
D
0A
(The leak warning device shall be installed in the gathering place of refrigerant.)
Fig. 6-3 Mechanical Ventilation Device
6.5 Hand over to the client
1) Hand over the Use Manual for the Indoor Unit and the Installation Manual for the Outdoor Unit to the client.
2) Explain the contents of Use and Installation Manual to the client carefully.
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