Wolf CFL-WRG Installation And Maintenance Instructions Manual page 21

Flow rate calculation
CFL 10 effective pressure
Δp = effective pressure
(symbolic representation)
CFL 15 effective pressure
Δp = effective pressure
(symbolic representation)
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9. Commissioning
The flow 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 flow rate can be calculated from effective pressure Δp
(differential pressure of the two static pressures) using the following equation.
The doors must be closed to determine the correct flow 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 specifications must be used for flow rate determination.
For the CFL 10 use a K value of 65.
Flow rate [m³/h]
Δp [Pa] 3 10
V [m³/h] 100 200
For the CFL 15 use a K value of 70.
Flow rate [m³/h]
Δp [Pa] 50 75 100 130 165
V [m³/h] 500 600 700 800 900 1000 1100 1200 1300 1400 1500
20 40 60 85
300 400 500 600
205 245
w
115 150 190 235
700 800 900 1000
295 345 400 460
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