<div dir="ltr">I'm a Generac service tech and have some experience installing gaseous generators (their term). I don't have any experience with freezing, being in the Caribbean.<div>Virtually every installation not designed by a tech will have fuel piping that is too small. The 20KW Generac Guardian needs a minimum 3/4" pipe but we typically install 1" TRACPIPE to allow for more volume. I have seen plumbers install two lengths of 4ft flexible pipe designed for stoves. A domestic stove requires about 50K btu/hr, a 20KW LPG generator requires about 400,000 btu/hr.</div>
<div><br></div><div>We normally use twin stage regulators but if the run is long we may use two separate stages. As the intermediary stage is higher pressure it can use a smaller pipe size.</div><div><br></div><div>As I understand it, the larger pipe before the generator allows the gas to smooth out any standing waves or pulses. </div>
<div><br></div><div><br></div><div><br></div><div><br></div><div><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Mon, Feb 17, 2014 at 8:04 PM, Ray Walters <span dir="ltr"><<a href="mailto:ray@solarray.com" target="_blank">ray@solarray.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<div>Wow, so would you need a small
expansion tank to dampen that out? IS that even allowed on LPG?
What was the cure?<div class=""><br>
<pre cols="72">R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
<a href="tel:303%20505-8760" value="+13035058760" target="_blank">303 505-8760</a></pre></div><div><div class="h5">
On 2/17/2014 4:19 PM, <a href="mailto:toddcory@finestplanet.com" target="_blank">toddcory@finestplanet.com</a> wrote:<br>
</div></div></div><div><div class="h5">
<blockquote type="cite"><font face="arial" size="4">
<p style="margin:0;padding:0">to further complicate things, i
have seen "regulator oscillation" problems with 2 in series.</p>
<p style="margin:0;padding:0"> </p>
<p style="margin:0;padding:0">todd</p>
<p style="margin:0;padding:0"> </p>
<p style="margin:0;padding:0"> </p>
<p style="margin:0;padding:0"> </p>
<p style="margin:0;padding:0"> </p>
<p style="margin:0;padding:0">On Monday, February 17, 2014
2:30pm, "Ray Walters" <a href="mailto:ray@solarray.com" target="_blank"><ray@solarray.com></a> said:<br>
<br>
</p>
<div>
<div>Alot of these generator setups
need 2 regulators, so usually the regular one stays at the
tank, size the pipe for the flow rate ( just like wire and
amps....<span><span> ;-) </span></span>.)
and put the 2nd regulator right at the generator.<br>
<p style="margin:0;padding:0">R.Ray
Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer, Licensed Master Electrician
Solar Design Engineer
<a href="tel:303%20505-8760" value="+13035058760" target="_blank">303 505-8760</a>
On 2/17/2014 3:17 PM, Larry Crutcher, Starlight Solar
Power Systems wrote:</p>
</div>
<blockquote>Ditto Tom, seen this too often in Mexico. I carry
a manometer to make check the pressure at the <span style="text-decoration:underline">LP input to the
generator with the engine running</span>. Make sure it is
at/above 11" WC when it starts to act up. If the regulator
is at the tank, long vapor runs can cause too much pressure
loss.
<div>Larry<br>
<div><br>
<br>
<div>
<div>On Feb 17, 2014, at 1:36 PM, Tom Duffy <<a href="mailto:Tom@thesolar.biz" target="_blank">Tom@thesolar.biz</a>>
wrote:</div>
<br>
<div style="font-family:Helvetica;font-size:medium;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:-webkit-auto;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px" lang="EN-US">
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<div style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:'Times New Roman',serif"><span style="font-family:Arial,sans-serif">Hi
Guys</span></div>
<div style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:'Times New Roman',serif"><span style="font-family:Arial,sans-serif"> </span></div>
<div style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:'Times New Roman',serif"><span style="font-family:Arial,sans-serif">We
have had “icing” problems here in Central
America as well where the gas company put in
½’ pipe to a 12K Gillette Generator, same
description the gen would initially start and
run fine but then it went erratic the Radian
didn’t like it, the customer wanted to blame
the Radian (I was sure it wasn’t)</span></div>
<div style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:'Times New Roman',serif"><span style="font-family:Arial,sans-serif"> </span></div>
<div style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:'Times New Roman',serif"><span style="font-family:Arial,sans-serif">The
installer/dealer couldn’t figure it out. I
went out and immediately saw the small pipe,
plus they had bent a crimp into the incoming
fuel line as well. ¾” line fixed the whole
thing. LP has a lot of moisture and will
always have delivery problems with funky
installation of pipe. Seems that a lot of gas
guys just hook up kitchen ranges (Here)</span></div>
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<div style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:'Times New Roman',serif"><span style="font-family:Arial,sans-serif">Kind
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