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Residual Air in zones not calling- What is normal?
Looking for advice. We have a new home built a year ago, 3000 sq feet in New England. Builder's contractor put in 5 ton, single stage, 3 zone system. Zone 1 is the first floor (approx 1200 sq ft). Zone 2 and zone 3 make up the 2nd floor (approx1700 sq feet). We have had multiple issues since day 1 that the contractor has worked with us to try and resolve. Biggest 2 issues are: (1) the compressor turning on for 6 minutes where it gets really cold really fast, then its off for 15 min where it gets warm until the system kicks back on (2) cold air coming out of vents in zones not calling and zones cooling below the set temp (mostly Zone 1- first floor). Contractor checked dampers and they are working. He just installed a static bypass in order to try and fix both problems -so the 5 tons of air would have somewhere to go when only one or two zones are calling. The bypass did seem to help some with comfort (ie: not freezing us out in that 6 minutes), however, its' still cycling on for approx 6 minutes and off for approx 15 and we still can't seem to achieve a consistent comfortable temp. We also still seem to get a good amount of air blowing through zone 1 when zone 2 or 3 is calling. I'm being told that's normal residual air? But it seems like too much air- enough air to cause the curtains to move. Is there a way to test the air that is coming out of the vents not calling to see what the air flow is? And what should we accept as normal residual air flow from vents in a zone not calling?
And is it normal for a system to cycle on for 6 min and off for 15min ? or should it be more consistent, like on for 10, off for 10?
Thanks for any advice!