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12. Installation Instruction
12.1 Indoor Floor Area Requirement
If the total refrigerant charge in the system is <1.84 kg, no additional minimum floor area is required.
If the total refrigerant charge in the system is ≥1.84 kg, additional minimum floor area requirements is
complied as described below:
Symbol Description Unit
kg
kg
kg
H
=
Total refrigerant charge in system
Maximum refrigerant charge allowed
m
c
- m
max
Installation height m
cm
2
Minimum ventilation opening area
Total refrigerant charge in system, m
c
(kg)
Pre-charged refrigerant amount in unit (kg)
+ Additional refrigerant amount after installation (kg)
m
c
m
max
m
excess
VA
min
A) Determine Maximum refrigerant charge allowed, m
max
1. Calculate Installation Room Area, A
room
.
2. Based on Table I, select m
max
which corresponds to the calculated A
room
value.
3. If m
max
≥ m
c
, the unit can be installed in the installation room with the specified installation height (H=600mm)
in Table I and without additional room area or any additional ventilation.
4. Else, proceed to B) and C).
B) Determine Total Floor Area of A
room
and B
room
compliance to A
min
total
1. Calculate the B
room
area adjacent to the A
room
.
2. Determine the A
min
total
based on the Total Refrigerant Charge, m
c
from Table II.
3. The total floor area of both A
room
and B
room
must exceed A
min
total
.
C) Determine Minimum Venting Opening Area, VA
min
for natural ventilation
1. From Table III, calculate m
excess
.
2. Then determine VA
min
corresponding to the calculated m
excess
for natural ventilation between A
room
and B
room
.
3. The unit can be installed at specific room only when the following conditions are fulfilled:
Two permanent openings, one at bottom, another at top, for ventilation purposes are made between
A
room
and B
room
.
Bottom openin
:
- Must comply to the minimum area requirement of VA
min
.
- Openin
must be located 300mm from the floor.
- At least 50% of required opening area must be
200mm from the floor.
>1500mm
Installation
Room
(A
room
)
Adjacent
Room
(B
room
)
>VA
min
>0.5VA
min
- The bottom of the opening shall not be higher
than the point of release when the unit is installed
and must be situated 100mm above the floor.
- Must be as close as possible to the floor and
lower than H.
Top opening:
- The total size of the Top opening must be more
than 50% of VA
min
.
- Opening must be located 1500mm above the
floor.
The height of the openings must more than 20mm.
A direct ventilation opening to outside is NOT encouraged for ventilation opening (the user can block the
opening when it is cold).
The value of H is considered as 0.6m to comply to IEC 60335-2-40:2018 Clause GG2.
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