Adjustment Of Air Distribution Profile; Measuring Air Pressure And Calculating The Air Flow; Measuring Static Nozzle Pressure And Air Pressure; Calculating The Actual Air Flow - Lindab Plexus Installation Instructions Manual

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Installation instruction

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.
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Lindab reserves the right to make changes without prior notice
2021-03-02
Plexus
Lindab PC410
Order no: 103344