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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='color:#1F497D'>Yes, crankcase heaters can be found in any packaged equipment with a compressor, and more likely with heatpumps (which operate in cool ambient conditions).<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Here’s a listing of crankcase heaters for various recognizable heatpump names: <a href="https://www.johnstonesupply.com/storefront/refrigeration/compressors/parts/crankcase-heaters/c1027699-c1027201-c1028085-c1027179-p1.html">https://www.johnstonesupply.com/storefront/refrigeration/compressors/parts/crankcase-heaters/c1027699-c1027201-c1028085-c1027179-p1.html</a><o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>This sample varies from ~30 - 140 Watts, sometimes varying output on their own with temperature.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Sometimes these are simply on all the time, other times you’ll have controls that <o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-family:Symbol;color:#1F497D'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='color:#1F497D'>cutoff operation above a certain temperature <o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-family:Symbol;color:#1F497D'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='color:#1F497D'>prevent heating while compressor is actually operating<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-family:Symbol;color:#1F497D'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='color:#1F497D'>vary wattage with temperature<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-family:Symbol;color:#1F497D'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='color:#1F497D'>energize only during as part of the ON cycle<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>eQUEST (as an illustrative example) has defaults which assumes crankcase heating controls reflective of the first two bullets: <o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-family:Symbol;color:#1F497D'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='color:#1F497D'>50F cutoff, <o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-family:Symbol;color:#1F497D'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='color:#1F497D'>only when compressor isn’t operating,<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-family:Symbol;color:#1F497D'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='color:#1F497D'>either 50W or 24W per compressor, depending on system type.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>If on a data sheet you see the phrasing “low-ambient kit,” then a crankcase heater is likely a part of that option. Low-ambient kits can include other features/controls such as a defrost cycle, hoods to increase condenser fan velocity, etc. For some manufacturers, crankcase heaters are standard on packaged AC/HP equipment and won’t be listed as an option you’d otherwise have to specify (particularly as you move upwards into larger equipment, where the service calls could be more costly).<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>In a similar vein, anyone dealing with simulating open cooling towers (operating at or near freezing temperatures) should seek out the presence of basin water heaters. They are very similar to compressor crankcase heaters in terms of operation, but can be an order of magnitude more impactful to miss!<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>~Nick<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#3A7A46'><img border=0 width=722 height=9 id="Picture_x0020_1" src="cid:image001.png@01D20533.140D1B80"><o:p></o:p></span></p><p class=MsoNormal><b><span style='font-family:"Arial","sans-serif";color:#3A7A46'>Nick Caton, P.E.</span></b><span style='color:#3A7A46'><o:p></o:p></span></p></div><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'> 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'>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></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='color:#1F497D'><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="Picture_x0020_3" src="cid:image002.png@01D20533.140D1B80" alt="cid:image001.png@01D189AB.58634A10"></span><span style='color:#3A7A46'><o:p></o:p></span></p></td></tr></table><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Bldg-sim [mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Doug Maddox via Bldg-sim<br><b>Sent:</b> Friday, September 02, 2016 1:25 PM<br><b>To:</b> bldg-sim@lists.onebuilding.org<br><b>Subject:</b> [Bldg-sim] PTHP crankcase heater?<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Does anyone know whether packaged terminal heat pumps use crankcase heaters, and if so, what is a typical Wattage?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks,<br>Doug Maddox<o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><br>______________________________________________________________________<br>This email has been scanned by the Symantec Email Security.cloud service.<br>______________________________________________________________________<o:p></o:p></span></p></div></body></html>