I have a forced air wood burner to heat a shop. It sits outside and has duct to blow the air inside including a return air duct. The return is about 12' long 12" round. The supply is 10" round with about 9' of run and enters the building through a 12" duct. The blower is rated at 1800 cfm, has a 1/2 hp 1075, 3 speed motor. I don't have a real good way to measure the actual air flow but I don't thing there is any way this thing is putting anywhere near that much out.
I have checked rotation wiring etc and I can't put my finger on the problem. The motor is a direct drive, split Capacitor, OAO motor. I checked the capacitor and it was border line so I replaced it, no help. I'm not sure of any other way to determine if the motor speed is correct, I don't have a tach, and I'm not sure what the heck else to look for. I attached a couple pics of inside the blower enclosure and the over all layout. Please excuse the bucket duct supports I'm still working on the install.
I have checked rotation wiring etc and I can't put my finger on the problem. The motor is a direct drive, split Capacitor, OAO motor. I checked the capacitor and it was border line so I replaced it, no help. I'm not sure of any other way to determine if the motor speed is correct, I don't have a tach, and I'm not sure what the heck else to look for. I attached a couple pics of inside the blower enclosure and the over all layout. Please excuse the bucket duct supports I'm still working on the install.