Daikin RXYQ10PY1 [480/487] Step 3 calculate the refrigerant density using the results of the calculations in step 1 and 2 above

Daikin RXYQ12PY1 [480/487] Step 3 calculate the refrigerant density using the results of the calculations in step 1 and 2 above
Caution for Refrigerant Leaks ED34-645B
872 Guide Specifications
Step 3: Calculate the refrigerant density using the results of the calculations in Step (1) and (2) above.
If the result of the above calculation exceeds the dangerous concentration level then make similar calculations for the
second then third smallest room and so on until the result falls short of the concentration level.
Step 4: Dealing with situations where the result exceeds the dangerous concentration level.
Where the installation of a facility results in a concentration in excess of the dangerous concentration level then it
may be necessary to revise the system design to dome extent or else take one of the following courses of action.
Action 1: Making openings which will allow the air to flow freely into the room.Make openings above and below the
door which are each equivalent in size to 0.15% or more of the floor area or make a doorless opening.
Action 2: Fit a mechanical ventilator linked to a gas leak detection alarm device.
Note:
This precaution shows the requirement of EN.
The precaution should be followed in accordance of local code.
Total volume of refrigerant
in the refrigerant system
<= Dangerous concentration (kg/m³)
Size (m
3
) of the smallest room in
which there is an indoor unit
installed
in the case of: R-407C = 0.35kg/m³, R-410A = 0.44kg/m³

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