dancour
New Member
Posts:36
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21 Nov 2009 04:05 PM |
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So here’s my plan to backwash my water-to-air heat pump to remove hardness deposits.
Install a hose bid in the EW and LW pipes.
Pump white vinegar from an elevated position into the HP LW pipe, through the HP coil, out the EW hose bid and back to the plastic bucket.
Allow pump to run for 2 hours or so – to be determined by the effluent color.
Close EW hose bid, open EW valve a little a fill bucket several times to rinse the coil from LW hose bid directly.
PS I am planning on having a professional do an acid wash every 5 years if needed.
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Attachment: Backwash Pic and Note n.jpg
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engineer
Veteran Member
Posts:2749
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21 Nov 2009 08:51 PM |
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Might work. other options I've read of is ice machine cleaner or Lime Away. I can't say how the heat exchanger will hold up against any of the three |
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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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waterpirate
Basic Member
Posts:467
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22 Nov 2009 05:02 AM |
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Congratulations!! You are a graduate of the diy common sense academy. Set up will work fine. Trick is to find the least caustic so;ution that is still effective at cleaning the coil and stay cost effective. Eric Sackett weberwelldrilling.com |
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Eric Sackett<br>www.weberwelldrilling.com<br >Visit our Geothermal Resource Center! |
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dancour
New Member
Posts:36
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22 Nov 2009 06:52 AM |
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I wonder if there would be any warranty issues with WaterFurnace.
PS The best improvements I made after the installation I believe were a.) a spin down filter on the incoming water line b.) an inline water flow gauge that can be bypassed and c.) a pair of inexpensive temperature gauges on the EWL and LWL. |
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dancour
New Member
Posts:36
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22 Nov 2009 07:01 AM |
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Does any one know anything about this product that is set up for cleaning Tankless HWT's ?
www.flowaide.com |
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engineer
Veteran Member
Posts:2749
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22 Nov 2009 08:06 AM |
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Another reason I dislike tankless HWTs
Yes, a product geared toward descaling a water heater should work for heat exchanger
Eric hit the nail on the head - trick is to periodically, no more often than necessary, descale the heat exchanger with a solution of minimum strength to get the job done. Any cleaning process will somewhat impact the heat exchanger - too strong an acid will clean it but also dissolve it.
A worst case scenario has loop water or cleaning solution getting into the refrigerant loop, ruining the compressor. That should not happen if caught in time since the early stages of a leak to the refrigerant side will result in refrigerant leaving the system since its side is under higher pressure, at least until all the liquid refrigerant boils away.
It is worth noting that swimming pool heat exchangers are often made with Titanium to ward off damage from Chlorine. |
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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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Geothermalman
New Member
Posts:58
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22 Nov 2009 06:53 PM |
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NuCalgon Ice maker cleaner. Nickle safe is what I have been using. |
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engineer
Veteran Member
Posts:2749
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22 Nov 2009 09:37 PM |
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Duly noted |
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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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