Daikin VRV 5-S Series Installation And Operation Manual page 13

VRV system serving 6 rooms. The biggest room has an area of
60 m², the smallest room has an area of 16 m². No underground
floor in the building.
Use graph (c) to check the maximum allowed charge for a room of
16 m² with a ceiling mounted unit: 10.4 kg
Maximum field piping charge=charge
charge=10.4 kg–3.4 kg=7 kg
m (kg)
16
15
(c)
14
13
12
(d)
10.4
9.4
8
7
6
(a)
5
4
(b)
3
2
1
0
25
10 16 20 28
Example 2:
VRV system serving 6 rooms. The biggest room has an area of
60 m², the smallest room has an area of 16 m². There are multiple
underground floors in the building and the smallest room of the
lowest underground floor has an area of 28 m².
Use graph (c) to check the maximum allowed charge for a room of
16 m² with a ceiling mounted unit: 10.4 kg
Use graph (d) to check the maximum allowed charge for the
smallest room (28 m²) of the lowest underground floor: 9.4 kg
9.4 kg<10.4 kg, therefore the maximum field piping charge is 9.4 kg
(smallest value).
Maximum field piping charge=charge
charge=9.4 kg–3.4 kg=6 kg
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600329-1A – 2020.01
in system–factory
35 45
A (m )
2
40 50
min
in system–factory
2 Specific installer safety instructions
Flow chart
Procedure to check if
smallest room size
meets the requirements
Determine smallest room area.
See step 1 in the above text.
A [m²]
min
Derive total charge limit from
graph for underground floor
and other floors.
See steps 2 & 3 in the above
text.
Total charge
limit [kg]
Determine total charge amount
of the system. See step 4 in
the above text.
Total charge
amount [kg]
1. Increase area of smallest room.
2. Decrease piping length by changing
layout.
3. Add additional countermeasures
as described in applicable legislation.
See step 5 in the above text.
Total charge amount
<
Total charge limit?
YES
Start installation
Change installation:
OR
OR
NO
Installation and operation manual
13