Check if room sizes
meet the requirements
Start installation
Derive total charge limit from
graphs for lowest underground
floor and other floors.
See step 2 in the above text.
Determine room areas for all
rooms with indoor unit
installed, or served by ducted
indoor unit from another room.
See step 1 in the above text
Change installation:
1. Increase room area.
OR
2. Decrease piping length by changing
layout.
OR
3. Increase the installation height of the
unit or the height of the duct.
OR
4. Add additional countermeasures
as described in applicable legislation.
OR
5. Fine-tune system with more detailed
calculations in VRV Xpress.
See step 4 in the above text.
Determine total charge amount
of the system. See step 3 in
the above text.
Total charge amount
<
Total charge limit?
A
[m²]
Total charge
limit [kg]
Total charge
amount [kg]
YES
NO
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