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- With partition and without opening which serve as passage of air to adjoining room
Calculate refrigerant concentration
Total amount of replenished
refrigerant in refrigerant facility [kg(lbs)]
Capacity of smallest room where
3
indoor unit is installed [m
(ft
In case the concentration exceeds the limit
When the concentration exceeds the limit, change original plan or take one of the countermea-
sures shown below:
• Countermeasure 1
Provide opening for ventilation.
Provide 0.15% or more opening to floor space both above and below door, or provide opening
without door.
• Countermeasure 2
Provide gas leak alarm linked with mechanical ventilator.
Reducing the outdoor refrigerant qty.
Countermeasure 2
Pay a special attention to the place, such as a basement, etc. where refrigerant can stay,
since refrigerant is heavier than air.
Smallest
room
= Refrigerant concentration
[Kg/m
3
)]
(R410A)
Gas leak alarm
Mechanical ventilator
Indoor unit
CAUTION FOR REFRIGERANT LEAK
Outdoor unit
Indoor unit
In case the result of calculation exceeds
the limiting concentration, perform the
3
3
(lbs/ft
)]
same calculations by shifting to the
second smallest, and the third smallest
rooms until at last the result is below the
limiting concentration.
Countermeasure 1 Opening effective to ventilation
95

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  • Robert Falco Sep 02, 2019 01:27:
    looking for piping diagram for an LG unit Arum144