KMC Controls BAC-5051 TRUEFIT Measurement System Router User Guide

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Alternative to Running Learning Mode  

While not ideal, the damper characterization data can be calculated and entered  

manually in the AFMS Table. This should only be done if—in the allotted time  

for setting up the AFMS—the ΔT is unlikely to remain greater than the Min Delta  

Temp for the duration of Learning Mode.  

To make the calculations, use the %OA/%RA equations found in ASHRAE  

Standard 111, section 7.6.3.3, “Flow Rate Approximation by Temperature Ratio”.  

1. Go to the Configure tab.  

2. For Damper Setpoint, enter the first damper position (Closed, i.e. 0) found in  

the AFMS Table (on the Tune tab).  

NOTE: Note: Each subsequent time through this process, enter the next  

damper position from the table: 5, 10, 15, 20, 30, 40, 50, 60, 70, 80, 90,  

100.  

3. Click Save.  

4. Go to the Monitor tab.  

5. Allow the Outside Air Temp, Return Air Temp, and Mixed Air Temp to  

stabilize.  

6. Depending on the application, calculate either the OA Fraction or RA  

Fraction, using the temperature readings and either the %OA or %RA  

equation from the standard.  

7. Go to the Tune tab.  

8. Enter the result into the OA Fraction column/ RA Fraction column  

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NOTE: For Pressure Assist applications, also enter the Supply Air Flow reading  

into the SA Flow column and the OAD Diff. Pressure / RAD Diff.  

Pressure reading into the Diff. Pressure column.  

9. Select Save.  

Repeat those steps for the remaining 12 damper positions listed on the AFMS  

Table.  

Access the AFMS Table and Record Data  

On the Tune page, in the AFMS Table group:  

1. Locate the Characterized Airflow Performance^® data, found in:  

• The OA Fraction column (for both standard and outside air damper pres-  

sure assist applications)  

• The RA Fraction column (for return air damper pressure assist applica-  

tions only)  

• The SA Flow column (for both types of pressure assist applications only)  

• The Diff. Pressure column (for both types of pressure assist applications  

only)  

2. Record the data into the Note Sheets for AFMS Checkout and  

Commissioning:  

• For standard applications, use the AFMS Post Table.  

• For pressure assist applications, use the AFMS PA Post Table.  

BAC-5051(A)E Pages for Configuring an AFMS, AG230819C  

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General	Details
Name	KMC Controls BAC-5051 TRUEFIT Measurement System Router User Guide
Make	KMC CONTROLS
Language	English
Filetype	PDF (Download)
File size	0.27 MB

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