Daikin RXYSA4A7V1B - Page 27

3 | Specific installer safety instructions
Installer and user reference guide
27
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600330-1 – 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. 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