Caution For Refrigerant Leaks - LG ARUV025GSD0 Engineering Product Data Book

1. Caution For 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.
1.1 Introduction
Though the R410A refrigerant is harmless and incombustible itself , the room to equip the air conditioner should be large enough to
such an extent that the refrigerant gas will not exceed the limiting concentration even if the refrigerant gas leaks in the room.
n Limiting concentration
Limiting concentration is the limit of Freon gas concentration where immediate measures can be taken without hurting
human body when refrigerant leaks in the air. The limiting concentration shall be described in the unit of kg/m
gas weight per unit air volume) for facilitating calculation.
Outdoor unit
1.2 Checking procedure of limiting concentration
Check limiting concentration along following steps and take appropriate measure depending on the situation.
n Calculate amount of all the replenished refrigerant (kg) per each refrigerant
Amount of replenished
refrigerant per one outdoor
unit system
Amount of replenished
refrigerant at factory shipment
n Calculate minimum room capacity
Calculate room capacity by regarding a portion as one room or the smaller room.
(1) Without partition
Indoor unit
Limiting concentration: 0.44kg/m
Flow of
(No.1 system)
refrigerant
Indoor unit
Amount of additional
+ replenished refrigerant
Amount of additionally
replenished refrigerant
depending on piping
length or piping
diameter at customer
(2) With partition and with opening which serve as passage of
Outdoor unit
3 (R410A)
Room where refrigerant leaks
(Refrigerant of the whole No.1
system flows out.)
Total amount of replenished
=
refrigerant in refrigerant
facility (kg)
Note : In case one refrigerant facility is
divided into 2 or more refrigerant
systems and each system is
independent, amount of replenished
refrigerant of each system shall be
adopted.
air to adjoining room
Indoor unit
Opening
Partition
3 (Freon
system.
Outdoor unit
In the case of opening
without door , or 0.15
% or more openings
(to floor space) both
above and below door)
R410A(50/60Hz)
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