LG A2UW18GFAC Manual page 159

MULTI
1. Information for Refrigerant
1.2 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.
1.2.1 Concentration limit
Concentration limit is the limit of Freon gas concentration where immediate measures can be taken without
hurting human body when refrigerant leaks in the air. The concentration limit shall be described in the unit of
3
kg/m (Freon gas weight per unit air volume) for facilitating calculation.
Outdoor unit
Indoor unit
1.2.2 Checking procedure of limiting concentration
Check concentration limit along following steps and take appropriate measure depending on the situation.
■ Calculate refrigerant concentration
1. Calculate amount of all the replenished refrigerant (kg) per each refrigerant system.
Amount of pre-charged
refrigerant per single
system
Amount of replenished
refrigerant at factory shipment
2. Calculate the volume of the room where indoor unit is installed as single room or the smallest room.
Without partition
Indoor unit
Concentration limit : 0.44kg/m
Flow of
(No.1 system)
refrigerant
Amount of additional
replenished refrigerant
Amount of additionally
replenished refrigerant
depending on piping
length or piping
diameter by customer
With partition but opened which
serve passage of air to adjoining
Outdoor unit
Indoor unit
Opening
Partition
3
(R410A)
Room where refrigerant leaks
(Refrigerant of the whole No.1
system flows out.)
Total amount of refrigerant
in the system
(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.
With partition and without opening
which serve as passage of air to
room
Outdoor unit
In the case of opening
without door , or 0.15
% or more openings
Smallest
(to floor space) both
room
above and below door)
Installation of Outdoor Units
adjoining room
Outdoor unit
Indoor unit
3