Commercial exhaust fan troubleshooting. If fan was ordered as a supply air fan but made as an exhaust air fan or vice versa flip the propeller over. For the most part commercial fans are probably not at the top of your priority list. B Motor may be defective. Check the rotation arrow stamped on the fan.
Intake and exhaust side of fan. When the unit is turned OFF the shutter will close. All fans are ULcUL Listed Standard 705. In this guide well cover everything you need to know to properly buy maintain and troubleshoot an upblast fan. Check the circuit breaker panel. Propeller bushing should always be facing down into roof opening. SP 265 wg near the entry to the fan u0007Point 5.
It can sometimes be a very complicated task to identify the category of the specific problem. Fan speed too slow. Disconnect power source before servicing. Leaks in duct work. SP 030 wg near the outlet from the fan and entry to the exhaust stack Next you ask for static pressure taps and manometers to be installed at each of the five measuring points. When Do You Need Exhaust Fan Repair Service.