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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Nick,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal>Here are some answers to your questions:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>1. I believe Bill is correct in his response yesterday.<o:p></o:p></p><p class=MsoNormal>2. NUMBER-OF-UNITS is an alternative to MAX-CAP/UNIT. However, MAX-CAP/UNIT will still have an effect if the total system capacity divided by NUMBER-OF-UNITS exceeds the MAX-CAP/UNIT value. This prevents having unrealistically high capacity handled by the refrigerant piping.<o:p></o:p></p><p class=MsoNormal>3. Refrigerant line insulation is not editable. The thickness of insulation depends on pipe size and whether it is a liquid pipe or a gas pipe as follows.<o:p></o:p></p><p class=MsoNormal>High Pressure Liquid Pipe:<o:p></o:p></p><p class=MsoNormal> <= 0.375 inch nominal pipe size: 0.375 inch insulation thickness<o:p></o:p></p><p class=MsoNormal> Larger pipe: 0.5 inch insulation thickness<o:p></o:p></p><p class=MsoNormal>Suction Gas Pipe:<o:p></o:p></p><p class=MsoNormal> < 2 inch nominal pipe size: 1 inch insulation thickness<o:p></o:p></p><p class=MsoNormal> Smaller pipe: 0.75 inch insulation thickness<o:p></o:p></p><p class=MsoNormal> Insulation conductivity is 0.25 Btu/hr-in-F<o:p></o:p></p><p class=MsoNormal>4. The only system diagram I have is shown below. Leader is the line from the outdoor unit to the first branch, header is the main line from the first branch to the last branch, and a branch is from the header to an indoor unit.<o:p></o:p></p><p class=MsoNormal><img width=877 height=324 id="Picture_x0020_3" src="cid:image001.png@01D478F5.ED9E1D30"><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>5. The AUX-POWER represents energy for controls, not backup heating. Maybe electric baseboards could work for supplemental. Probably should be addressed in a future release.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#7030A0'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#7030A0'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From:</b> Equest-users [mailto:equest-users-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Nicholas Caton via Equest-users<br><b>Sent:</b> Friday, November 9, 2018 4:40 PM<br><b>To:</b> equest-users@lists.onebuilding.org<br><b>Subject:</b> [Equest-users] New eQuest VRF capabilities - Questions<o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Hi everyone!<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I have a couple questions to pose as I’m wading into the new VRF capabilities built into the new eQuest build 3.65-7175, in doe 2.3 mode. Curious if anyone else in parallel has solved any of the following, or else would like to pile on with additional queries:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><ol style='margin-top:0in' start=1 type=1><li class=MsoNormal style='mso-list:l3 level1 lfo3'>Where in the eQuest interface can I review/edit the input for MAX-CAP/UNIT in a VRF system? I’ve seen repeated references to this between the SIM outputs and the reference help files, and I know the default is affected by the indoor cassette type selection (VRF-TERM-TYPE)… I just can’t find the input in the airside system (PVVT), zonal inputs, or Condensing unit input windows… Probably I’m just missing it, but is it perhaps missing in the interface?<o:p></o:p></li></ol><p class=MsoListParagraph style='margin-left:1.0in'><img width=748 height=188 id="Picture_x0020_2" src="cid:image007.png@01D478F5.DF502840"><o:p></o:p></p><ol style='margin-top:0in' start=2 type=1><li class=MsoNormal style='mso-list:l3 level1 lfo3'>Expanding on the last question, am I correct in understanding the NUMBER-OF-UNITS input within the preceding reference article for MAX-CAP/UNIT is referring to this input under “Unit Staging” in the Basics tab for Air-Side Systems? Seems from the article this could serve as a proxy for MAX-CAP/UNIT in effect…<o:p></o:p></li></ol><p class=MsoListParagraph><img width=1141 height=677 id="Picture_x0020_4" src="cid:image008.png@01D478F5.DF502840"><o:p></o:p></p><ol style='margin-top:0in' start=3 type=1><li class=MsoNormal style='mso-list:l3 level1 lfo3'>For determining thermal losses, is refrigerant line insulation an editable input for branch (airside system) and leader/header (condensing unit) refrigerant piping? Is that just a constant omitted for simplicity of inputs?<o:p></o:p></li><li class=MsoNormal style='mso-list:l3 level1 lfo3'>For illustration, is there a system diagram anywhere at present in the reference manual, similar to those provided for existing SYSTEM articles? (I’m thinking this might provide an overview of the terminology like leader vs header vs branch piping, and diagram the split between what inputs are specified at the CONDENSING-UNIT vs the airside SYSTEM)<o:p></o:p></li><li class=MsoNormal style='mso-list:l3 level1 lfo3'>I don’t have the impression that the condenser inputs for AUX-POWER are intended to cover auxiliary/secondary heat sources for when a VRF’s heating capacity needs an extra kick during wintertime operation. I reckon electric baseboards are the natural answer for supplemental heat at the zone, but which inputs fields are most appropriate (if any) for radiators in an outdoor unit enclosure (Literature: <a href="https://www.daikinac.com/content/assets/DOC/White-papers-/BPG-EXTAMB.pdf">https://www.daikinac.com/content/assets/DOC/White-papers-/BPG-EXTAMB.pdf</a>)?<o:p></o:p></li><li class=MsoNormal style='mso-list:l3 level1 lfo3'>Would it be possible to identify makes/models of real world equipment that the library performance curves are based upon?<o:p></o:p></li></ol><p class=MsoNormal style='margin-left:.75in'><b>… Answering my own question:</b> Comments within the BDLLIB.DAT file (eQuest Data Directory <span style='font-family:Wingdings'>à</span> ../DOE23/BDLLIB.DAT), starting on line 25094, provide some sources for the VRF library performance curves.<o:p></o:p></p><p class=MsoNormal style='margin-left:.75in'><o:p> </o:p></p><p class=MsoNormal style='margin-left:.75in'>Here is a curve commentary reference I made for myself – may as well share:<o:p></o:p></p><p class=MsoNormal style='margin-left:.75in'><o:p> </o:p></p><p class=MsoNormal style='margin-left:1.0in'><u>VRF Curve</u> <u>Comment</u><o:p></o:p></p><p class=MsoNormal style='margin-left:1.0in'>VRF-FAN-EIR-FPLR $1.4 exponent for multi-speed fans <o:p></o:p></p><p class=MsoNormal style='margin-left:1.0in'>VRF-HP-Resys-ClCap-fSST&ODB $Daikin RXYMQ48MVJU, no SST dependence <b><o:p></o:p></b></p><p class=MsoNormal style='margin-left:1.0in'>VRF-HP-Resys-ClEIR-fSST&ODB $Daikin RXYMQ48MVJU, no SST dependence <b><o:p></o:p></b></p><p class=MsoNormal style='margin-left:1.0in'>VRF-HP-Resys-ClEIR-fPLR $Coefficients from Daikin for EER~11 excluding indoor fan heat <o:p></o:p></p><p class=MsoNormal style='margin-left:1.0in'>VRF-HP-Resys-Cycle-fPLR $Estimated, 1.6 minutes at 50% cycle<o:p></o:p></p><p class=MsoNormal style='margin-left:1.0in'>VRF-HP-Resys-HtCap-fSCT&OWB $Daikin RXYMQ48MVJU, no SCT dependence<o:p></o:p></p><p class=MsoNormal style='margin-left:1.0in'>VRF-HP-DefrostCap-fOWB $Daikin and Mitsubishi similar<o:p></o:p></p><p class=MsoNormal style='margin-left:1.0in'>VRF-HP-Resys-HtEIR-fSCT&OWB $Daikin RXYMQ48MVJU, no SCT dependence <o:p></o:p></p><p class=MsoNormal style='margin-left:1.0in'>VRF-HP-Resys-HtEIR-fPLR * no comment *<o:p></o:p></p><p class=MsoNormal style='margin-left:1.0in'>VRF-HP-Resys-Crankcase-fPLR $Used for both heating and cooling<o:p></o:p></p><p class=MsoNormal style='margin-left:1.0in'>VRF-EP-Cap-fSDT&SST $From EnergyPlus sample input - high speed curve<o:p></o:p></p><p class=MsoNormal style='margin-left:1.0in'>VRF-EP-EIR-fSDT&SST $From EnergyPlus sample input - high speed curve<o:p></o:p></p><p class=MsoNormal style='margin-left:1.0in'>VRF-EP-EIR-fPLR $From EnergyPlus sample input, refitted - Ratio & DT<o:p></o:p></p><p class=MsoNormal style='margin-left:1.0in'>VRF044-Cap-fSST&SDT $DanFoss VZH028-035-044 <o:p></o:p></p><p class=MsoNormal style='margin-left:1.0in'>VRF044-EIR-fSST&SDT $DanFoss VZH028-035-044 <o:p></o:p></p><p class=MsoNormal style='margin-left:1.0in'>VRF044-EIR-fPLR $DanFoss VZH028-035-044 <o:p></o:p></p><p class=MsoNormal style='margin-left:1.0in'>VRF088-Cap-fSST&SDT $DanFoss VZH088AG <o:p></o:p></p><p class=MsoNormal style='margin-left:1.0in'>VRF088-EIR-fSST&SDT $DanFoss VZH088AG <o:p></o:p></p><p class=MsoNormal style='margin-left:1.0in'>VRF088-EIR-fPLR $DanFoss VZH088AG<o:p></o:p></p><p class=MsoNormal style='margin-left:1.0in'>VRF_CL_ThermLoss_fPLR&SST $From typical piping layout for 20 ton system<o:p></o:p></p><p class=MsoNormal style='margin-left:1.0in'>VRF_HT_ThermLoss_fPLR&SDT $From typical piping layout for 20 ton system<o:p></o:p></p><p class=MsoNormal style='margin-left:1.0in'>VRF_COOL_DTSAT_fSST $From typical piping layout for 20 ton system<o:p></o:p></p><p class=MsoNormal style='margin-left:1.0in'>VRF_HEAT_DTSAT_fSDT $From typical piping layout for 20 ton system <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>~Nick<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#3A7A46'><img border=0 width=726 height=9 id="Picture_x0020_1" src="cid:image009.png@01D478F5.DF502840"><o:p></o:p></span></p><p class=MsoNormal><b><span style='font-family:"Arial","sans-serif";color:#3A7A46'>Nick Caton, P.E., BEMP</span></b><span style='color:#3A7A46'><o:p></o:p></span></p><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 width=724 style='width:543.0pt;border-collapse:collapse'><tr><td width=230 valign=top style='width:172.3pt;padding:0in 0in 0in 0in'><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469'> Senior Energy Engineer</span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#1F497D'><br></span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469'> Regional Energy Engineering Manager<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469'> Energy and Sustainability Services</span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#1F497D'><br></span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469'> Schneider Electric</span><span style='color:#1F497D'><o:p></o:p></span></p></td><td width=291 valign=top style='width:218.3pt;padding:0in 0in 0in 0in'><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#57B069'>D </span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469'>913.564.6361 </span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#1F497D'><br></span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#57B069'>M </span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469'>785.410.3317 </span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#1F497D'><br></span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#57B069'>F </span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469'>913.564.6380</span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#1F497D'><br></span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#57B069'>E </span><span style='color:#1F497D'><a href="mailto:nicholas.caton@schneider-electric.com"><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469'>nicholas.caton@schneider-electric.com</span></a><o:p></o:p></span></p></td><td width=203 valign=top style='width:152.4pt;padding:0in 0in 0in 0in'><p class=MsoNormal align=right style='text-align:right'><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469'>15200 Santa Fe Trail Drive<br>Suite 204<br>Lenexa, KS 66219<br>United States</span><span style='color:#1F497D'><o:p></o:p></span></p></td></tr><tr style='height:4.0pt'><td width=724 colspan=3 valign=top style='width:543.0pt;padding:0in 0in 0in 0in;height:4.0pt'><p class=MsoNormal style='mso-line-height-alt:4.0pt'><span style='color:#3A7A46'><img border=0 width=722 height=49 id="_x0000_i1028" src="cid:image010.png@01D478F5.DF502840"><o:p></o:p></span></p></td></tr></table><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>