Hello,
I am about to order a Clearvue CV1800. I am in Australia and the units here (both CV1800 and CVMax) are spec'd with 4 hp motors. The CV1800 is standard with a 15" impeller and the CVMax with a 16". Both units are supplied with a VFD to convert to 60Hz 3 phase supply to the motor.
I will be running 6" ducting throughout and will be venting outside. I estimate my static pressure will be about 10-12" at the farthest point and a minimum of about 8".
I was going to order my CV1800 with the 16" impeller based on positive reports from the US claiming increased CFM. I also figured that if the CVMax was supplied with the 16" impeller and 4hp motor and given it's larger ducting and therefore higher CFM, the motor should not be overloaded on 6" ducting (and therefore lower CFM) with the CV1800.
Should I stick with the 15" impeller? I'm worried about overloading the 4 hp motor if I draw enough CFM to make the 16" impeller effective. Is the 15" impeller actually going to perform better on my setup given the 4hp motor limit (vs the US 5 hp motor).
It's hard to figure out without a fan-power curve.
Any help would be appreciated. I'm about to put in an order. 15" or 16" ???
Cheers,
Dom
I am about to order a Clearvue CV1800. I am in Australia and the units here (both CV1800 and CVMax) are spec'd with 4 hp motors. The CV1800 is standard with a 15" impeller and the CVMax with a 16". Both units are supplied with a VFD to convert to 60Hz 3 phase supply to the motor.
I will be running 6" ducting throughout and will be venting outside. I estimate my static pressure will be about 10-12" at the farthest point and a minimum of about 8".
I was going to order my CV1800 with the 16" impeller based on positive reports from the US claiming increased CFM. I also figured that if the CVMax was supplied with the 16" impeller and 4hp motor and given it's larger ducting and therefore higher CFM, the motor should not be overloaded on 6" ducting (and therefore lower CFM) with the CV1800.
Should I stick with the 15" impeller? I'm worried about overloading the 4 hp motor if I draw enough CFM to make the 16" impeller effective. Is the 15" impeller actually going to perform better on my setup given the 4hp motor limit (vs the US 5 hp motor).
It's hard to figure out without a fan-power curve.
Any help would be appreciated. I'm about to put in an order. 15" or 16" ???
Cheers,
Dom