[Mitch Spence]

I have recently had my Carrier HVAC unit retrofitted with a four zone system. This was to accommodate a new sunroom where I want to control the heat and air more carefully.

One problem: the new system accumulates air (static pressure) in one of the zones that has to be relieved occasionally. When that happens, the system blows/dumps at a really high fan speed for up to ten minutes in one of the zone rooms. The high fan speed is quite annoying and essentially chases you out of that room.

My question is this: is there any way to control this? If it would only blow at a lower speed, everything would be fine.

Thanks for any input.

 

[roughneck]

How was the zoning done, was duct replaced?
How large are the zones?
What equipment is being used?
Sunroom is a very different environment. I’d have suggested a separate minisplit for such a space.

 

[Mitch Spence]

Thanks for responding.

All ducts were replaced and had dampers installed. Each zone is a room of 300 square feet or less. A sensor was placed in each zone as well. Equipment is Carrier Infinity.

 

[user_12345a]

There are different infinity models.

Some are 2-stage, others are modulating/variable capacity.

With 2-stage and 4 zones, air will has to be bled off to keep duct pressure under control when only one zone is calling.