I can't seem to find how Trane controls the variable speed blower speed in combination with the Trane zone panel and XL1050. I have a newly installed system with two zones and all communicating gear and so far it is pretty cool, love how the zone board uses static pressure to adjust dampers and blower speed but for some reason we are not getting the most performance out of the upstairs zone. For example the auto zone feature does a test to figure out how much air can be reliably pushed between zones and ours comes back with 61% for downstairs and 100% for upstairs, so theoretically the panel could operate the blower at 100% when a call from the upstairs zone is received but both zones never go above 64% or total CFM. Anyone else run into this issue? I currently have it set to auto-zoning with the More Aggressive option which is supposed to calculate a higher external duct static and deliver an increased amount of air into each calling zone.
Based on my reading of the zone panel manual there isn't much control of CFM if it is communication. Also the Indoor Heating Airflow Offset% is currently set to 0 so heating calls should not diminish the CFM. Attached are two pics, one shows the heat call at 5 degrees above current temp and shows damper open for upstairs zone with compressor at 67% and the second pic is of the zone board which shoes a static pressure of just 0.37 and CFM at 65% capacity. My only other thought is that maybe some how the compressor speed is tied to the CFM speed, would love to hear from someone who has experience with this type of gear.
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Based on my reading of the zone panel manual there isn't much control of CFM if it is communication. Also the Indoor Heating Airflow Offset% is currently set to 0 so heating calls should not diminish the CFM. Attached are two pics, one shows the heat call at 5 degrees above current temp and shows damper open for upstairs zone with compressor at 67% and the second pic is of the zone board which shoes a static pressure of just 0.37 and CFM at 65% capacity. My only other thought is that maybe some how the compressor speed is tied to the CFM speed, would love to hear from someone who has experience with this type of gear.
