1. Refrigerant leakage caution
The installer and system specialist shall secure safety against leakage according to local regulations
or standards. The following standards may be applicable if local regulations are not available.
1-1. Introduction
This air conditioners use R410A as refrigerant. Though R410A is harmless and incombustible in it-
self, the room in which the air conditioner is installed should be large enough that the refrigerant gas
will not exceed the concentration limit even if the refrigerant gas leaks.
Concentration limit
Concentration limit is the limit of freon gas concentration where immediate measures can be taken
without hurting the human body when refrigerant leaks in to the air. The concentration limit shall be
described in units of kg/m
3
(freon gas weight in per m
3
air) to facilitate calculation.
Concentration limit for R410A
0.42 kg/m
3
Outdoor units
Indoor units
No.1 system
Flow of refrigerant
*
*: Room where refrigerant leaks (Refrigerant of the whole No.1 system flows out.)
1-1. Introduction - (09-1) - 1. Refrigerant leakage caution
NOTES
NOTES
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