Mitsubishi Electric MXZ-8B48NA Technical & Service Manual page 80

(b) There are partitions, but there are openings that allow the effective mixing of air.
Indoor unit
Opening
Wall
(c) If the smallest room has mechanical ventilation
Apparatus that is linked to a household gas detection and alarm device, the calculations should be performed for
the second smallest room.
Ventilation apparatus
The smallest The second
room smallest room
(3) Use the results of calculations (1) and (2) to calculate the refrigerant concentration:
Total refrigerant in the refrigerating unit (O[lbs])
The smallest room in which an indoor
unit has been installed (K[ft³])
If the calculation results do not exceed the maximum concentration, perform the same calculations for the larger second and
third room, etc., until it has been determined that nowhere will the maximum concentration be exceeded.
Outdoor unit
(Situation in which there are no door openings or
in which there are openings above and blow
doors that occupy at least 0.15% of the floor area)
Outdoor unit
Indoor unit
[ maximum concentration
(O/K[lbs/ft³])
Maximum concentration of
R410A: 0.3O/K[0.019 lbs/ft³]
80