TRUEFIT BAC-5051A E Airflow Measurement System Router User Guide

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Check Min Delta Temp. If the current ΔT (the absolute difference between the outside and return air  

temperatures) is less than the minimum difference allowed, then continue to Enabling Learning Mode to  

Auto Start on page 9.  

Note: Go to Monitor to find Outside Air Temp and Return Air Temp. Calculate the absolute difference,  

then compare to Min Delta Temp.  

Manually Starting Learning Mode  

If Learn Ready reports READY (see Checking Learn Ready Status on page 8), you may start Learning Mode  

manually.  

Leave Min Delta Temp set to the default, or adjust it if needed.  

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Note: If the ΔT becomes less than the Min Delta Temp, the AFMS controller will abort Learning Mode. This  

is to insure that the controller does not receive unusable learning samples. Setting the Min Delta Temp at  

a 10°F or larger difference is recommended.  

Leave Time Between Samples (Seconds) set to the default, or adjust it if needed.  

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Note: Most often, Time Between Samples (Seconds) can be left on the default (60 seconds). You might  

increase the value if the damper Stroke Time (see Setting AFMS Parameters on page 5) is longer than  

that of a typical unit, or if the damper actuator requires extra time to respond. You might decrease it if a  

large ΔT is present and time at the site is limited. However, too little time between samples could result in  

inaccurate measurements.  

For Learning Mode, select ON.  

Select Save.  

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Wait for Learning Mode to complete.  

Note: To calculate the total time (in minutes) that Learning Mode should take to complete, multiply Time  

Between Samples (Seconds) by 91, then divide by 60.  

Note: Learn Timer shows the elapsed time since Learning Mode started.  

Enabling Learning Mode to Auto Start  

If Learn Ready reports NOT READY because of currently unfavorable temperatures (see Interpreting Learn  

Ready Status on page 8) you may enable the AFMS controller to automatically start Learning Mode when it  

detects favorable temperatures at a later time.  

Leave Min Delta Temp set to the default, or adjust it if needed.  

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AFMS BAC-5051(A)E Router AG  

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AG230818A  

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Name	TRUEFIT BAC-5051A E Airflow Measurement System Router User Guide
Make	TRUEFIT
Language	English
Filetype	PDF (Download)
File size	0.2 MB

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