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P
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Installation instructions
Plexus
We reserve the right to make changes
2019-06-20
We reserve the right to make changes
2019-06-20
lindab | we simplify construction
6.2 Adjustment of air distribution profile
Plexus comes as standard (S) with fixed angled JetCone Nozzles, which provide 360
˚
optimal air distribution.
6.3 Measuring air pressure and calculating the air flow
Before calculating the airflow, the static nozzle pressure must first be measured. The static nozzle pressure is the air
pressure available at the nozzles.
6.3.1 Measuring static nozzle pressure and air pressure
• To measure the air pressure, a manometer, ( analogue or digital ) will be needed. Lindab recommends PC410.
• Insert the measuring tube onto the specialized measuring nozzle.
• Read of the static nozzle pressure from the manometer (PC410).
6.3.2 Calculating the actual air flow
• After measuring the static pressure, read the settings of the four JetCone adjustment pins to find the mean value of
the pins.
• Locate the diagram inside the openable perforated faceplate, (also see next page), and use the static nozzle pressure
and the mean value of the pins to find the current airflow.
6.3.3 Changing the actual air flow
• Measure the static nozzle pressure.
• Locate the air pressure/airflow diagram inside the openable perforated faceplate. (Also see diagrams on next page).
• Find the mean value of the 4 pins to reach the desired airflow, in the diagram. Use the static nozzle pressure and the
desired airflow to find the mean value of the 4 pins.
• Adjust the 4 pins in the Plexus, so the mean value of the pins will correspond with the mean value found in the
diagram.
• See example in 6.1.3 , asymmetric pin setting: 2 + 3 + 5 + 6 = 16/4 = 4 . ( Where (4) was the value read in diagram).
6.3.4 Changing the air distribution profile
See 6.1.3.
Lindab PC410
Order no: 103344
Room