Start installation
No safety measure
Alarm Natural ventilation
Shut-off valves
Remote controller with R32 safety system
compatibility shall be installed for each indoor unit.
See the requirements in above text.
Make field settings in the indoor unit
accordingly.
Alarm system must additionally
warn at a supervised location
with 24-hour monitoring.
YES
NO
Is one (or more) of the
four conditions met?
Is indoor unit installed in occupancy:
1. with sleeping facilities?
2. where an uncontrolled number of people are
present?
3. accessible for persons not familiar with the
necessary safety precautions?
4. Where people are restricted in their
movement.
Not allowed!
Determine other safety
measure.
Determine total room area (= total area of the
space with natural ventilation and the space in
which the indoor unit is installed).
The partition between two rooms on the same
floor MUST meet one of the two requirements
for natural ventilation.
Derive total refrigerant charge limit.
NO
YES
Total charge amount
<
Total charge limit
A
1
+ A
min
[m²]
Total charge limit [kg]
See Step
1 in above chapter
See Step
2 in above chapter
See Step
4 in above chapter
A
min
[m²]
Check if smallest room size meets
requirements.
Determine smallest room area served
by same branch pipe port. See step 1 in
above text.
See Step
1 in above chapter
Change installation for this port:
1. Increase area of smallest room
OR
2. Reduce connected indoor capacity
below limit
OR
3. Split indoor capacity over 2 separate
SV unit ports
OR
4. Fine tune system with VRV Xpress.
Select the SV unit.
Derive maximum indoor capacity to
connect to branch pipe port.
NO
YES
Total indoor capacity index
<
Capacity index limit
See Step
2 in above chapter
explanation.
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