tchild
New Member
Posts:6
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| 23 Dec 2009 07:58 AM |
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I've got a WF "E" series 3 ton, closed loop, split unit (model EZ036S11ANBSSA) which continues to lock out because of water flow. I checked the loop pressure and it was 28 psi before I increased it to 50psi. The unit ran for about 24 hrs (out side temp around 31 degrees) and kicked out on water flow again. This has happened 4 times in the last 5 days (2 TIMES AFTER THE RECHARGE). I checked the WIT and WOT and they are 36 and 31 after only running for (1) hour, about 30 min. on stage 2. I'll continue to monitor through the day. Last summer we had the compressor go south and replaced. We had to have the service guys come out twice on a high pressure lockout. The unit was overcharged and both guys took freon out of the system. After that, it worked fine in cool mode. We have been running in heat mode for awhile with outside temp getting to 13 degrees F with no problems until last week. Can anyone help me on this? Could their be air in the loop and if so how can I get it out? Thanks.
Tim |
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engineer
Veteran Member
Posts:2749
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| 23 Dec 2009 09:09 AM |
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5 degree waterside split sounds ok. Is there anti-freeze in the loop? Is the low temp cutout set to reflect presence / absence of anti-freeze? |
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Curt Kinder <br><br>
The truth is incontrovertible. Malice may attack it, ignorance may deride it, but in the end, there it is - Winston Churchill <br><br><a href="http://www.greenersolutionsair.com">www.greenersolutionsair.com</a>
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tchild
New Member
Posts:6
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| 23 Dec 2009 09:36 AM |
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Yes their is. Don't know about the cutout. How do I check?
Tim |
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engineer
Veteran Member
Posts:2749
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| 23 Dec 2009 10:47 AM |
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There's probably a jumper or dipswitch. You'd need the install manual. |
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Curt Kinder <br><br>
The truth is incontrovertible. Malice may attack it, ignorance may deride it, but in the end, there it is - Winston Churchill <br><br><a href="http://www.greenersolutionsair.com">www.greenersolutionsair.com</a>
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tchild
New Member
Posts:6
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| 23 Dec 2009 12:45 PM |
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I checked the dip switch and it was set for a open loop so I've set it for closed loop (15 degrees). Is a WIT of 35 degrees normal? I was thinking it would be more inline with a ground temp of 50 degrees F ?
Tim |
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geotek
Basic Member
Posts:154
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| 23 Dec 2009 02:15 PM |
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It needs to be set for closed loop. That's why you were locking out.
35F would be considered normal WIT.
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engineer
Veteran Member
Posts:2749
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| 23 Dec 2009 03:59 PM |
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Make darned sure your loop fluid is freeze protected to below 15 F |
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Curt Kinder <br><br>
The truth is incontrovertible. Malice may attack it, ignorance may deride it, but in the end, there it is - Winston Churchill <br><br><a href="http://www.greenersolutionsair.com">www.greenersolutionsair.com</a>
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G.O. Joe
Basic Member
Posts:110
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| 23 Dec 2009 05:49 PM |
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I second the antifreeze warning from engineer.
In that regard I have to ask how you boosted loop pressure? Hopefully without adding air or so much water to dilute the antifreeze. You can draw off a bit and toss it in the freezer with a thermometer in it and keep checking for the freeze point (that is when it gets the slightest bit slushy .
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tchild
New Member
Posts:6
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| 24 Dec 2009 05:42 AM |
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I added with tap water (See pic) but it came up to pressure quick so I don't think much water was added to dilute the glycol solution. I used a garden hose and am concerned that I forgot to purge it before adding the water. I had run water through the 25ft hose before attaching the adapter. I'm going to take the specific gravity or check it in the freezer to see if it gels before 15 degrees. If I need to I'll add some glycol using a RV diaphragm pump. What type of glycol/antifreeze solution does it take?
Tim |
 Attachment: geo fill.jpg
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tchild
New Member
Posts:6
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| 27 Dec 2009 07:29 AM |
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It looks like my system has propylene in it and starts slushing at around 27 degrees F. Based on this I switched my temp protection back to 30. Is their any problem adding RV antifreeze (Propylene) to get my freeze point back to 15 degrees?
Tim |
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Palace Geothermal
Veteran Member
Posts:1609
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| 27 Dec 2009 09:42 AM |
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Posted By tchild on 12/27/2009 7:29 AM
It looks like my system has propylene in it and starts slushing at around 27 degrees F. Based on this I switched my temp protection back to 30. Is their any problem adding RV antifreeze (Propylene) to get my freeze point back to 15 degrees?
Tim You can buy propylene in 5 gal buckets from radiant heating supply houses. Using RV antifreeze might work, I just have never done it. Mixing different brands could cause problems. The worst you would have to do is flush the system and start over.
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Dewayne Dean
<br>www.PalaceGeothermal.com<br>Why settle for 90% when you can have 400%<br>We heat and cool with dirt!<br>visit- http://welserver.com/WEL0114/- to see my system |
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G.O. Joe
Basic Member
Posts:110
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| 27 Dec 2009 04:25 PM |
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Tim
At this point someone has to calculate how many gallons your system holds and how much antifreeze to add to bring you down to the proper protection level. The original installer should have these numbers and info about type antifreeze used.
Then you will need a flush cart to complete the job. That will also take care of any air you may have let in when you boosted your pressure up.
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joe.ami
Veteran Member
Posts:4377
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| 27 Dec 2009 10:23 PM |
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Where is the installer in all this? How old is the system?
joe |
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Joe Hardin
www.amicontracting.com
We Dig Comfort!
www.doityourselfgeothermal.com
Dig Your Own Comfort! |
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tchild
New Member
Posts:6
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| 28 Dec 2009 07:03 AM |
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I'm calling him today to see what the capacity is and what % glycol he put in to the loop. The unit was installed in 2005 and I believe my technician has repressurized the loop a couple of time. The unfortunate thing is you don't know how much water was put into the loop.
Tim |
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