Measuring The Airflow Using Station (Grid) Method - Fantech FIT 70E Manuel D'installation Et D'utilisation

Measuring the airflow using station (grid) method

1 Cut hole in duct and insert flow measuring
station. Make sure that the flow measuring
station's air direction arrow points in the
direction of the airflow. Secure the flow
measuring station with aluminum foil tape.
Minimum
457mm (18")
Measure
here
2 Before taking the reading, make sure that
the magnehelic gauge is level and at 0.
Refer to the flow measuring station's
chart to determine your unit's airflow
velocity.
• To avoid airflow turbulence and incorrect
readings, the airflow velocity should be
measured on a section of steel ducting.
Measure
Reading should also be taken at a minimum
here
distance of 457 mm (18") from the unit or
elbow. Measurement should also be made
Minimum
prior to any transition in the duct work so
457mm
(18")
entire airflow is measured.
3 Adjust the "Supply Air Out" damper until
you reach the desired velocity. Follow
steps 1-3 to adjust the "Exhaust Air Out"
damper, if needed.
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