3
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Specific installer safety instructions
Installer and user reference guide
22
EKVDX32~100A2VEB
VRV system air conditioner
4P664010-1 – 2021.08
0
2
4
6
8
10
18
22
12
16
27
14.4
24
28
30
31
10 20
40
60
80
85
100
50
30
70
90
m (kg)
A
tot
(m
2
)
(a)
(b)
3‒1 Example
Case 2: VAM+ EKVDX only
Step 1
– determine A
4
: the total area of all the rooms which the EKVDX unit is
"3.1.3 To determine the floor area"
22].
Step 2
– (see step 2 of case 1)
Step 3
– in case the EKVDX:
▪
is not discharging into any room in the lowest underground floor, refer to curve
(a).
▪
can discharge to a combination of rooms in the lowest underground floor and
other floors, refer to curve (b).
Step 4
– (see step 4 of case 1)
Step 5
– (see step 5 of case 1)
Example
VRV system with an EKVDX serving 5 rooms. The total room area is 85 m², the
smallest room with a ceiling mounted indoor unit on other floors has an area of
14 m². There are multiple underground floors in the building and the smallest room
with an indoor unit in the lowest underground floor has an area of 24 m².
▪
To check the maximum allowable charge for a total room area of 85 m² with an
EKVDX unit in the system, use curve (b) (see
22]).
Result:
14.4 kg.
▪
To check the maximum allowable charge, see the outdoor unit manual for the
following calculations:
-
for a room of 14 m² with a ceiling mounted unit not in the lowest underground
floor.
Result:
9.3 kg.
-
for the smallest room of 24m² of the lowest underground floor with a wall
mounted indoor unit.
Result:
8.1 kg.
8.1<9.3<14.4 kg, therefore the maximum allowable refrigerant charge is 8.1 kg
(smallest value).
Charge in system
8.1 kg
Factory charge
3.4 kg
Maximum field piping charge
4.7 kg
3.1.3 To determine the floor area
Follow these rules to determine the room area:
▪
Determine the room area by projecting the walls, doors and partitions to the
floor and calculating the enclosed area.
Содержание EKVDX-A
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