Daikin VRV Plus Series General Information Manual page 92

Si33-003.book Page 88 Monday, June 25, 2001 9:06 AM
Caution for Refrigerant Leaks
5. Caution for Refrigerant Leaks
5.1 Caution for Refrigerant Leaks
5.1.1 Introduction
(Points to note in connection with refrigerant leaks)
The VRV System, like other air conditioning systems, uses R-407C as refrigerant. R-407C itself is an
entirely safe non-toxic, non-combustible refrigerant. Nevertheless care must be taken to ensure that air
conditioning facilities are installed in a room which is sufficiently large. This assures that the maximum
concentration level of refrigerant gas is not exceeded, in the unlikely event of major leak in the system and
this in accordance to the local applicable regulations and standards.
5.1.2 Maximum Concentration Level
The maximum charge of refrigerant and the calculation of the maximum concentration of refrigerant is
directly related to the humanly occupied space in to which it could leak.
The unit of measurement of the concentration is kg/m³ ( the weight in kg of the refrigerant gas in 1m³
volume of the occupied space).
Compliance to the local applicable regulations and standards for the maximum allowable concentration
level is required.
In Japan the maximum allowed concentration level of refrigerant to a humanly space for R-407C is limited
to 0.3 kg/m³
88
1. Direction of The Refrigerant Flow
2. Room where refrigerant leak has occurred
1 (outflow of all the refrigerant from the
system)
2
Fig. 32
(V0885)
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SiE33-003
General Information