Static Pressure

[beenthere]

Static pressure can be too low in my opinion. Take for example a direct drive blower. If you run it alone with no duct it will over amp and over heat.You cover part of the intake to add static pressure and it works fine.But how low is too low? Im shure there are alot more opinions than mine.Does someone know the minimum?

He has a VS ECM blower, so it doesn't work like your description of a PC blower.

His Infinity control could also be reporting the static pressure lower then it is.

[stickinit2thman]

He has a VS ECM blower, so it doesn't work like your description of a PC blower.

His Infinity control could also be reporting the static pressure lower then it is.

K I meant to ask that. So with the ECM it doesnt need and duct static? And thanks for acknowlaging my suggestion. Nice to see some here have respect.

[energy star]

beenthere, how is control actually capturing that data? Have you known a particular % of full scale that my be incorrect? I'm not to familiar with this control. He did state it was 32 outside. Not knowing the number of total supply diffusers, it just seems very low once we look at the possible number of supplies in the house divided by that five hundred.

[Redwood650]

Did you think to take an amp reading? The reason I ask is I would like to know if that low will cause over amp condition like I described in my previous post. If you are called back to a blower motor failure you know what caused it. Was it a ECM?

Yes and it wasn't over amping. It could overamp if the motor was older I would imagine. This system was abut 4 years old.

[second opinion]

beenthere, how is control actually capturing that data? Have you known a particular % of full scale that my be incorrect? I'm not to familiar with this control. He did state it was 32 outside. Not knowing the number of total supply diffusers, it just seems very low once we look at the possible number of supplies in the house divided by that five hundred.

Are you asking how the Infinity controller is calculating the static/CFM?

[beenthere]

The VS motor Carrier uses is a communicating motor(it communicates with the infinity control). They use to use the 2.5 version, but now are using the 3.0 version.

It won't always read the same as a manometer will. but that is mainly from placement of the static probe, from the few that i have checked.

But I wouldn't rely on it only, if you ant to know how much air the system is actually moving.