Caution For Refrigerant Leaks - Daikin VRV System R-22 PLUS Series Manual

Si33-102.book Page 93 Tuesday, June 26, 2001 3:18 PM
SiE33-102

5. Caution for Refrigerant Leaks

5.1

Caution for Refrigerant Leaks

5.1.1 Introduction
(Points to note in connection with refrigerant leaks)
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 most other air conditioning systems, uses "R-22" as its refrigerant."R-22" itself is
an entirely safe non-toxic,non-combustible refrigerant but care must nevertheless be taken to ensure that
the air conditioning facilities are installed in a room which is sufficiently large to avoid a *dangerous
concentration of refrigerant gas in the unlikely event of a serious leak in the system. The KHK (High
Pressure Gas Protection Association, in Japan) has established its own standard in respect of refrigerant
gas concentrations for inclusion with the general standards covering refrigeration and air conditioning
facilities.
5.1.2 Maximum Concentration Level
Dangerous concentration
Dangerous concentration means the maximum concentration of CFC gas which can be dealt quickly and
with without damage to the person in the case of a leak of refrigerant into the air. The unit of measurement
of the dangerous concentration is kg/m³ (the weight in kg of CFC gas in 1m³ of air) for ease of calculation.
Dangerous concentration of R-22: 0.3 kg/m³
(KHK facility standard: S0010)
Pay a special attention to the place, such as a basement, etc. where refrigerant can stay, since refrigerant
is heavier than air.
General Information
direction of the refrigerant flow
room where refrigerant leak
has occurred (outflow of all the
refrigerant from the system)
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Caution for Refrigerant Leaks

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