<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML xmlns:o = "urn:schemas-microsoft-com:office:office"><HEAD> <META http-equiv=Content-Type content="text/html; charset=iso-8859-1"> <META content="MSHTML 6.00.2900.2963" name=GENERATOR></HEAD> <BODY> <DIV dir=ltr align=left> Hi Alex and all other,<o:p></o:p> <o:p> </o:p> the first view was ok with a negative flux, I changed it in the ctl file. But when I changed it per menu, I got the error message, that the value have to be > 0. <o:p></o:p> <o:p> </o:p> Additionally there must be something wrong, because I can not reach the setpoint temperature. I would like to cool a room with a cooling coil, if the room air temperature is higher then 26°C. The only way to handle the air temperature is due to variation of the cooling flux, but this is dissatisfying.<o:p></o:p> <o:p> </o:p> On the other side, the case with heating works fine. The heating coil heats, when the room air temperature is below the setpoint of 20°C.<o:p></o:p> <o:p> </o:p> Does anybody know if there is a possibility to set a temperature range for the heating/cooling coil? P.e. the temperature of the heating coil should be between 20 – 40°C and for the cooling coil between 16 – 24°C.<o:p></o:p> <o:p> </o:p> Best regards<o:p></o:p> Monika<o:p></o:p></DIV> <DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left> <HR tabIndex=-1> From: Ferguson, Alex [mailto:AFerguso@NRCan.gc.ca] Sent: Wednesday, October 11, 2006 4:38 PM To: Monika Hall; esp-r@lists.strath.ac.uk Subject: RE: [esp-r] plant: air cooling coil </DIV> <DIV></DIV> <DIV dir=ltr align=left>Hi Monika,</DIV> <DIV dir=ltr align=left> </DIV> <DIV dir=ltr align=left>The cooling coil model (CMP04) expects the control signal to be negative (i.e. -2000 for a 2000 W cooling duty.)</DIV> <DIV dir=ltr align=left> </DIV> <DIV dir=ltr align=left>- Alex </DIV> <DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left> <HR tabIndex=-1> From: esp-r-bounces@lists.strath.ac.uk [mailto:esp-r-bounces@lists.strath.ac.uk] On Behalf Of Monika Hall Sent: Wednesday, October 11, 2006 10:32 To: esp-r@lists.strath.ac.uk Subject: [esp-r] plant: air cooling coil </DIV> <DIV></DIV> <DIV> Dear all,<o:p></o:p> <o:p> </o:p> have anybody worked with the plant component „ air cooling coil, ref. no 4”? My model works fine with the plant component  „ air heating coil, ref. no 5”, but when I change the heating coil into a cooling coil the model does not work anymore. <o:p></o:p> <o:p> </o:p> I use the same controller for heating/cooling coil:<o:p></o:p> controller type a) senses dry bulb  -> actuates flux<o:p></o:p> Control law b) P,PI,PID for type 0,2,4... <o:p> </o:p> I use the same settings for heating/cooling, I only change the setpoints.<o:p></o:p> <o:p> </o:p> The error code is:<o:p></o:p> CMP04C: invalid control data for component 2: 2000<o:p></o:p> with 2: Cooling coil and 2000: max htg/clg cap [W]<o:p></o:p> <o:p> </o:p> Which setting is the right one for a cooling coil? Could somebody help me?   Best regards Monika</DIV></BODY></HTML>