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11. Installation Instruction (WH-ADF0309J3E5CM)
11.1 Indoor Floor Area Requirement
If the total refrigerant charge in the system is <1.84 k
g
, no additional minimum floor area is required.
If the total refrigerant charge in the system is ≥1.84 k
g
, additional minimum floor area requirements is
complied as described below:
Symbol
Description
Unit
k
g
k
g
k
g
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
(k
g
)
Pre-charged refrigerant amount in unit (k
g
)
+ Additional refrigerant amount after installation (k
g
)
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
=1640mm
)
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 (cannot be closed), one at bottom, another at top, for ventilation purposes are
made between
A
room
and
B
room
.
Bottom opening:
- Must comply to the minimum area requirement of
VA
min
.
- Opening must be located ≤300mm from the floor.
- At least 50% of required opening area must be
≤200mm from the floor.
Adjacent
Room
(
B
room
)
Installation
Room
(
A
room
)
>0.5 VA
min
>VA
min
>
150
0m
m
- 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.
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.
