Caution For Refrigerant Leaks - Daikin VRV Plus Series General Information Manual

Si33-003.book Page 163 Monday, June 25, 2001 9:06 AM
SiE33-003

9. Caution for Refrigerant Leaks

9.1

Caution for Refrigerant Leaks

9.1.1 Introduction
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.
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.
9.1.2 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
Pay a special attention to the place, such as a basement, etc. where refrigerant can stay, since refrigerant
is heavier than air.
Installation Manual
Caution for Refrigerant Leaks
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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