Section 5
Start with the booth doors closed and the pressure set point at -0.050 • Booth should balance near zero and exhaust VFD should not be running at full speed • If booth is running positive, or exhaust fan is running at full speed: • Is the tube properly connected to the pressure transmitter in the remote? • Use a velometer to measure the FPM through the booth. There may be less static pressure than anticipated and the AMU speed may need to be reduced. • Is exhaust fan running the correct rotation? • Are the correct & clean exhaust filters installed? • Inspect exhaust duct for restrictions – is the ARV open? • Check for System Effect
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