Caution For Refrigerant Leaks; Introduction - Daikin VRV IV REYQ72TATJA Design Manual

REYQ-TATJA / TAYDA

24. Caution for Refrigerant Leaks

24.1 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 other air conditioning systems, uses R410A as refrigerant. R410A 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.
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 lb./1000 ft.
Compliance to the local applicable regulations and standards for the maximum allowable concentration level is required.
Pay special attention to places, such as basements, etc. where refrigerant can stay, since refrigerant is heavier than air.
(the weight in Ibs. of the refrigerant gas in 1 ft.
3
Direction of the
refrigerant flow
Room where refrigerant leak has occurred
(outflow of all the refrigerant from the system)
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volume of the occupied space).
3