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8
INSTALLATION & ASSEMBLY INSTRUCTIONS
Introduction to Refrigerants R32
The maximum charge and the required minimum floor area
33 3
m = (4 m ) x LFL , m = (26 m )) x LFL, m = (130 m )x LFL
12 3
33
Where LFL is the lower flammable limit in kg/ m , R32 LFL is 0.306 kg/ m.
For the appliances with a charge amount m < M m :
12
(5/4) 1/2
The maximum charge in a room shall be in accordance with the following:m = 2.5 x (LFL) x h x (A)
max 0
The required minimum floor area Amin to install an appliance with refrigerant charge M (kg)
(5/4) 2
shall be in accordance with following: A = (M/ (2.5 x (LFL)x h))
min 0
Where:
m is the allowable maximum charge in a room, in kg;
max
M is the refrigerant charge amount in appliance, in kg;
Amin is the required minimum room area, in m2;
2
A is the room area, in m ;
3
LFL is the lower flammable limit, in kg/m ;
h is the installation height of the appliance, in meters for calculating m or A , 1.8 m for wall mounted;
0 max min
Table GG.1 Maximum charge (kg)
Category
LFL
3
(kg/m )
h
0
(m)
2
Floor area(m )
Category
LFL
3
(kg/m )
h
0
(m)
Charge amount (M) ( kg)
2
Minimum room area(m )
2
Table GG.2 Minimum room area (m )
Before installing the appliance, you must read the manual carefully to get the safety
information and notes.
When filling the combustible refrigerant, any of your rude operations may cause serious
injury or injuries to human body or bodies and object or objects.
A leak test must be done after the installation is completed.
It is a must to do the safety inspection before maintaining or repairing an air conditioner
using combustible refrigerant in order to ensure that the fire risk is reduced to minimum.
It is necessary to operate the machine under a controlled procedure in order to ensure
that any risk arising from the combustible gas or vapor during the operation is reduced to
minimum.
Requirements for the total weight of filled refrigerant and the area of a room to be equipped
with an air conditioner (are shown as in the following Tables GG.1 and GG.2)
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