Daikin EKVDX-A - To Determine the Floor Area

3 | 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
5030 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
discharging air into. See "3.1.3To determine the floor area"[4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 " 3‒1 Example"[4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.