Daikin VRV 5-S Series - Page 13

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