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<TITLE>FCU VAV FCU fan controls</TITLE>
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<P DIR=LTR><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"><FONT SIZE=2 FACE="Arial">H</FONT></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"><FONT SIZE=2 FACE="Arial">ello</FONT></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN></P>
<P DIR=LTR><SPAN LANG="en-us"><FONT SIZE=2 FACE="Arial">I am</FONT></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"> <FONT SIZE=2 FACE="Arial">“</FONT></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"><FONT SIZE=2 FACE="Arial">trying</FONT></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"> <FONT SIZE=2 FACE="Arial">“</FONT></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"><FONT SIZE=2 FACE="Arial"></FONT></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"> <FONT SIZE=2 FACE="Arial">comparing two systems: </FONT></SPAN></P>
<P DIR=LTR><SPAN LANG="en-us"><B><I></I></B></SPAN><SPAN LANG="en-us"><B><I><U><FONT SIZE=2 FACE="Arial">A typical FCU:</FONT></U></I></B></SPAN></P>
<P DIR=LTR><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"><FONT SIZE=2 FACE="Arial"> minimum fresh air provided within the Air handling unit and local cooling provided with the FCU. The flow rate in the FCU has then to be constant flow. The chilled water volume will fluctuate to respond to the load.</FONT></SPAN></P>
<P DIR=LTR><SPAN LANG="en-us"><B></B></SPAN><SPAN LANG="en-us"><B><U><FONT SIZE=2 FACE="Arial">A FCU/VAV system</FONT></U></B></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"><FONT SIZE=2 FACE="Arial">: </FONT></SPAN></P>
<P DIR=LTR><SPAN LANG="en-us"><FONT SIZE=2 FACE="Arial">Minimum fresh air provided within the AHU and on one floor of the building only few (4 instead of 40 FCU for example) small AHU which would be VAV. So effectively the fan consumption and cooling load should reduce as it would respond to the load.</FONT></SPAN></P>
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<P DIR=LTR><SPAN LANG="en-us"><FONT SIZE=2 FACE="Arial">I have been playing with</FONT></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"> <FONT SIZE=2 FACE="Arial">several</FONT></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"><FONT SIZE=2 FACE="Arial"> parameters (minimum fan control, minimum flow ratio,…) in the detailed mode but they do not seem to affect the result at all. Some help would be appreciated.</FONT></SPAN></P>
<P DIR=LTR><SPAN LANG="en-us"><FONT SIZE=2 FACE="Arial">It might be extremely basic but at the moment nothing seems to work.</FONT></SPAN></P>
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<P DIR=LTR><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"><FONT SIZE=2 FACE="Arial">Thanks in advance</FONT></SPAN><SPAN LANG="en-us"></SPAN><SPAN LANG="en-us"></SPAN></P>
<P DIR=LTR><SPAN LANG="en-us"></SPAN><SPAN LANG="en-gb"></SPAN><A NAME=""><SPAN LANG="en-gb">Michael</SPAN></A><SPAN LANG="en-us"></SPAN><SPAN LANG="en-gb"> </SPAN></P>
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