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Dan

Dan

Joined on February 20, 2006

Last Post on April 27, 2013

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Pipe erosion

@ April 27, 2013 11:27 AM in Hot Water Recirculation pipe erosion

Thanks for all of your feed backs.... Dan

Pipe erosion

@ April 27, 2013 11:16 AM in Hot Water Recirculation pipe erosion

My customer had Culligan install a Water Softener system. I don't know if the PH was checked.  Thanks for the reply.

Pipe erosion

@ April 27, 2013 11:16 AM in Hot Water Recirculation pipe erosion

My customer had Culligan install a Water Softener system. I don't know if the PH was checked.  Thanks for the reply.

Hot Water Recirculation pipe erosion

@ April 25, 2013 4:23 PM in Hot Water Recirculation pipe erosion

I have a commercial customer who is experiencing major pipe erosion on the return line feeding the recirculation circulator for the hot water . I have attached a photograph for you review. I will try to give you an abbreviated description of the installation and history of the job. The return pipe is 1" copper with the exception of approximately 20' of PEX  we used to repair the leaking sections. The circulator is a Grundfos stainless steel UPC-15-42SF which is good for 16GPM at a 0 head. I don't know how much equivalent pipe there is but I will estimate about 250'. The internal pipe erosion seems more prevalent closer to the inlet side of the circulator rather the supply side. The circulator runs 24/7. The water temperature is around 128 degrees.The last repair lasted around 6 months before another leak developed. The complex thought it may be the hard water. They installed a large water softener system. It seems to prolong the leaking intervals but did not stop it. We isolated the pipe in some instances where it lying against galvanized duct work. We added a ground wire and bonded the pipe back to the electrical service ground. I don't think it is a velocity problem in the pipe because I added a balancing valve on the outlet side of the circulator trying to restrict the flow. Has anyone else seen or experience this condition. Thanks in advance for your help.  Dan

Over Head Natural Gas Radiant vs 95% Warm Air Shop Heating

@ July 20, 2009 2:00 PM in Over Head Natural Gas Radiant vs 95% Warm Air Shop Heating

Does anyone have any pass experience or comments associated with the operational cost for heating a 4000 sq ft 18ft high shop in the northeast comparing low intensity overhead radiant unit(s) without setback, to 95% efficient variable speed warm air furnance(s) with night setback and ceiling fans. The fuel for both systems is natural gas. No zoning. Same given heat loss. Thanks for your comments in advance. Dan

Continuous Make up water needed

@ March 8, 2007 9:37 AM in High make-up water needed in closed loop heating system

I have a medium sized 1.5MBTU commercal hydronic system with numerous under the slap copper runs. The home run loops as well as mono flow tees are under the slab feeding perimeter baseboard above grade in each of the rooms with thermostatic valves . By accident we found the system lossing water after a unrelated service call. To make a long story short we tried to determine and isololate each zone with elevated water pressure monitoring. All zones lost some degree of pressure. We tried visual, as well as IR cameria's scans, found none. We installed a water meter before the feed valve to determine the amount of make up water. To our surprise we are losing approx 250 gals per week and we still can't locate it! This is a church that is approximately 15 years old. We dont have any "as built" prints to aid us. Has any body else come across a simular case and can give us (me) some direction. Thanks, DS