Countermeasure In The Event Of Refrigerant Leakage - Hitachi RWM-(H)FSN3E Technical Catalogue

9 Piping work and
refrigerant charge

9.4.3 Countermeasure in the event of refrigerant leakage

The facility must have the following features in case of a refrigerant leakage occurs:
1 Provide a shutterless opening which will allow fresh air to circulate into the room.
2 Provide a doorless opening of 0.15% or more size to the floor area.
3 There must be a ventilator fan connected to a gas leak detector, with a ventilator capacity of 0.4 m³/min or higher per
Japanese refrigeration ton (= compressor displacement volume / 5.7 m³/h) of the air conditioning system using the
refrigerant.
4 Pay special attention to the place, such as a basement, etc., where the refrigerant can stay, since refrigerant is heavier
than air.
116
TCGB0070 rev.3 - 04/2012
Outdoor unit model
RAS-3HVRN2
RAS-3HVRNME-AF
RAS-4H(V)RNME-AF
RAS-(5/6)H(V)RNME-AF
RAS-8HRNME-AF
RAS-10HRNME-AF
Tonnes
0.88
1.05
1.35
1.84
2.49
3.32