Wolf CFL-WRG - Page 21

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9.Commissioning
Flowratecalculation The ow rate is calculated using the effective pressure method. This involves
comparing the static pressure upstream of the inlet nozzle with the static
pressure in the inlet nozzle.
The ow rate can be calculated from effective pressure Δp
w
(differential pressure of the two static pressures) using the following equation.
The doors must be closed to determine the correct ow rate. Route the test
hoses to the outside when conducting the test.
Due to the installation conditions of the fans, K values differing from the
manufacturer's specications must be used for ow rate determination.
CFL10effectivepressure
Δp = effective pressure
(symbolic representation)
CFL15effectivepressure
Δp = effective pressure
(symbolic representation)
Δp [Pa] 50 75 100 130 165 205 245 295 345 400 460
V [m³/h] 500 600 700 800 900 1000 1100 1200 1300 1400 1500
For the CFL 15 use a K value of 70.
Effective pressure Δp [Pa]
Flow rate [m³/h]
Δp [Pa] 3 10 20 40 60 85 115 150 190 235
V [m³/h] 100 200 300 400 500 600 700 800 900 1000
For the CFL 10 use a K value of 65.
Effective pressure Δp [Pa]
Flow rate [m³/h]