<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:st1="urn:schemas-microsoft-com:office:smarttags" xmlns="http://www.w3.org/TR/REC-html40"
xmlns:ns6="http://schemas.microsoft.com/office/2004/12/omml">
<head>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 11 (filtered medium)">
<!--[if !mso]>
<style>
v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style>
<![endif]--><o:SmartTagType
namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PostalCode"/>
<o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags"
name="State"/>
<o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags"
name="place"/>
<o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags"
name="City"/>
<o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags"
name="Street"/>
<o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags"
name="address"/>
<!--[if !mso]>
<style>
st1\:*{behavior:url(#default#ieooui) }
</style>
<![endif]-->
<style>
<!--a:link
{mso-style-priority:99;}
span.MSOHYPERLINK
{mso-style-priority:99;}
a:visited
{mso-style-priority:99;}
span.MSOHYPERLINKFOLLOWED
{mso-style-priority:99;}
/* Font Definitions */
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:"Gill Sans MT";
panose-1:2 11 5 2 2 1 4 2 2 3;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:"Trebuchet MS";
panose-1:2 11 6 3 2 2 2 2 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman";}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal;
font-family:Arial;
color:windowtext;}
span.EmailStyle18
{mso-style-type:personal;
font-family:Calibri;
color:#1F497D;}
span.EmailStyle21
{mso-style-type:personal-reply;
font-family:Arial;
color:navy;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.25in 1.0in 1.25in;}
div.Section1
{page:Section1;}
-->
</style>
<!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang=EN-US link=blue vlink=purple>
<div class=Section1>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Ya I looked at all that, seemed to be
fine. It seems like whenever I change my system from single zone package to
variable air volume this problem comes up. I just changed the system type and
left everything else the same.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:3.0pt'><b><i><font
size=3 color="#333399" face="Times New Roman"><span style='font-size:12.0pt;
color:#333399;letter-spacing:1.2pt;font-weight:bold;font-style:italic'>Brian
Goldsmith</span></font></i></b><font color=navy><span style='color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><strong><b><font size=1 color=green face="Gill Sans MT"><span
style='font-size:7.5pt;font-family:"Gill Sans MT";color:green;letter-spacing:
1.0pt;font-weight:normal'><a href="mailto:Brian.Goldsmith@atce.com"
title="blocked::mailto:Brian.Goldsmith@atce.com">Brian.Goldsmith@atce.com</a></span></font></b></strong><span
class=MsoHyperlink><u><font color=blue><o:p></o:p></font></u></span></p>
<p class=MsoNormal><strong><b><font size=1 color=green face="Gill Sans MT"><span
style='font-size:7.5pt;font-family:"Gill Sans MT";color:green;letter-spacing:
1.0pt;font-weight:normal'>direct</span></font></b></strong><font size=1
color=green face="Gill Sans MT"><span style='font-size:7.5pt;font-family:"Gill Sans MT";
color:green;letter-spacing:1.0pt'> 408.487.1217<o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> Joe Fleming
[mailto:joe@thespinnakergroupinc.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, April 07, 2011
12:14 PM<br>
<b><span style='font-weight:bold'>To:</span></b> Brian Goldsmith;
equest-users@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> RE: [Equest-users] Heat
Pump Heating Undersized</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>Usually scheduling
(fan, available heating and t-stat don’t coincide every hour of every day),
airflow (too low), SAT (too low), or multiple zones on one unit.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>Usually…</span></font><b><u><font
size=2 color="#52b230" face="Trebuchet MS"><span style='font-size:11.0pt;
font-family:"Trebuchet MS";color:#52B230;font-weight:bold'><o:p></o:p></span></font></u></b></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><o:p> </o:p></span></font></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Brian Goldsmith<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, April 07, 2011
2:24 PM<br>
<b><span style='font-weight:bold'>To:</span></b>
equest-users@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [Equest-users] Heat Pump
Heating Undersized<o:p></o:p></span></font></p>
</div>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I’m having trouble with the heating in my heat pump. I
modeled a Packaged VAV (PVAVS) with HEAT-SOURCE= Heat Pump and
ZONE-HEAT-SOURCE= Not Installed. Set HEAT-SET-T to 120F, DESIGN-HEAT-T to 70F,
and did not specify auxiliary heat. I get the message that my zone has
insufficient heating capability. Looking at SS-A, is says the maximum heating
load is only -10.1 KBTU/HR. Looking at SS-P, the report says my heating
capacity is -47.8 KBTU/HR. So why do I have 563 underheated hours? Does it have
something to do with the system type? I tried ZONE-HEAT-SOURCE= Heat pump and
tried HEAT-SIZING-RATIO= 5, just to see if either one would do anything,
although I didn’t really expect them to. Also tried electric supplemental heat,
which comes out to -31.715 KBTU/HR. My design supply flow is 1913 CFM, and the
outside air flow is 252 CFM. The design supply flow is the same for both the
heating and cooling performance summaries. Should this be the case? Thanks for
any help.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><em><b><i><font size=3 color="#333399" face="Times New Roman"><span
style='font-size:12.0pt;color:#333399;letter-spacing:1.2pt;font-weight:bold'>Brian
Goldsmith, LEED</span></font></i></b></em><b><sup><font size=2 color="#333399"
face="Gill Sans MT"><span style='font-size:10.0pt;font-family:"Gill Sans MT";
color:#333399;letter-spacing:1.2pt;font-weight:bold'>®</span></font></sup><em><i><font
color="#333399" face="Times New Roman"><span style='color:#333399;letter-spacing:
1.2pt'> AP</span></font></i></em></b><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#333399" face="Times New Roman"><span
style='font-size:11.0pt;color:#333399'>Design Engineer<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 color=green face="Gill Sans MT"><span
style='font-size:7.5pt;font-family:"Gill Sans MT";color:green;letter-spacing:
1.0pt'><img border=0 width=149 height=30 id="_x0000_i1025"
src="cid:image001.jpg@01CBF528.BFF91460"><o:p></o:p></span></font></p>
<p class=MsoNormal><st1:Street w:st="on"><st1:address w:st="on"><font size=1
color=green face="Gill Sans MT"><span style='font-size:7.5pt;font-family:
"Gill Sans MT";color:green;letter-spacing:1.0pt'>97 E. Brokaw Road</span></font></st1:address></st1:Street><font
size=1 color=green face="Gill Sans MT"><span style='font-size:7.5pt;font-family:
"Gill Sans MT";color:green;letter-spacing:1.0pt'>, No 300<o:p></o:p></span></font></p>
<p class=MsoNormal><st1:place w:st="on"><st1:City w:st="on"><font size=1
color=green face="Gill Sans MT"><span style='font-size:7.5pt;font-family:
"Gill Sans MT";color:green;letter-spacing:1.0pt'>San Jose</span></font></st1:City><font
size=1 color=green face="Gill Sans MT"><span style='font-size:7.5pt;
font-family:"Gill Sans MT";color:green;letter-spacing:1.0pt'>, <st1:State
w:st="on">CA</st1:State> <st1:PostalCode w:st="on">95112</st1:PostalCode></span></font></st1:place><font
size=1 color=green face="Gill Sans MT"><span style='font-size:7.5pt;font-family:
"Gill Sans MT";color:green;letter-spacing:1.0pt'><o:p></o:p></span></font></p>
<p class=MsoNormal><strong><b><font size=1 color=green face="Gill Sans MT"><span
style='font-size:7.5pt;font-family:"Gill Sans MT";color:green;letter-spacing:
1.0pt;font-weight:normal'>main </span></font></b></strong><font
size=1 color=green face="Gill Sans MT"><span style='font-size:7.5pt;font-family:
"Gill Sans MT";color:green;letter-spacing:1.0pt'>408.487.1200<o:p></o:p></span></font></p>
<p class=MsoNormal><strong><b><font size=1 color=green face="Gill Sans MT"><span
style='font-size:7.5pt;font-family:"Gill Sans MT";color:green;letter-spacing:
1.0pt;font-weight:normal'>direct</span></font></b></strong><font size=1
color=green face="Gill Sans MT"><span style='font-size:7.5pt;font-family:"Gill Sans MT";
color:green;letter-spacing:1.0pt'> 408.487.1217</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=1 color="#339966" face="Gill Sans MT"><span
style='font-size:7.5pt;font-family:"Gill Sans MT";color:#339966;letter-spacing:
1.0pt'><a href="http://www.atce.com/" title="http://www.atce.com/">www.atce.com</a>
</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
</body>
</html>