Daikin SV1A25AJV1B - About Measuring the Airflow Rate

18 | Commissioning
Installer and user reference guide
112
SV1A25AJV1B+SV4~8A14AJV1B
VRV 5 safety valve unit
4P749917-1 – 2023.09
▪ pressure inside the SV unit has to be more than 20 Pa below the ambient
pressure,
▪ minimum airflow rate:
Model Minimum airflow rate [m³/h]
SV1A 82
SV4A 82
SV6~8A 84
Example
A SV8A unit with an airflow rate during the test run of 115m³/h. The pressure drop
graph shows that this results in an internal pressure which is 38 Pa below the
ambient pressure. Both requirements are met:
▪ The pressure inside the SV unit is more than 20Pa below the ambient pressure
(38Pa).
▪ The airflow rate is higher than 84m³/h (115m³/h).
-
38.01
115
P
INTERNAL
[Pa]
-300
-250
-200
-150
-100
0
0
50
100
150
200
250
300
-50
AFR
OUT
[m³/h]
AFR
OUT
Airflow rate [m³/h]
P
internal
Internal pressure below ambient pressure [Pa]
See the latest version of the technical engineering data for the SV unit's pressure
drop curves.
18.3.3 About measuring the airflow rate
It is up to the installer to measure the airflow rate and provide correct data. We
advise two ways in the sections below, but the installer is entirely free on how to
perform the measurement.
About measuring with a vane anemometer
▪ Where: Measure the airflow rate at the air inlet (damper) of the SV unit.
▪ Tip: Use the duct connection kit (EKBSDCK) and an anemometer with a funnel to
conduct the entire airflow through the anemometer.
▪ Postrequisite: Remove the kit once the measurement is finished.
b
a
a Vane anemometer
b Duct connection kit (EKBSDCK)