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#1
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bleeding air from a liquid system; high point?
We have a high efficiency furnace that heats water which is
piped thru a concrete slab. This is a question about air in the liquid and bleeding of the system. There is one accumulator in the system. It hangs down from the piping and I assume it has a bladder. This is what I don't understand. Why is it below the piping? If air gets into the system (which it has) it has nowhere to escape. It continues to race around the loop causing noise in the pump and flow regulation valves. Shouldn't the system's accumulator be above the piping to allow air to move into it and out of the normal liquid flow? And if the accumulator is not designed to bleed, then shouldn't there be a high point reservoir, with a bleed valve on the top? Thanks |
#2
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bleeding air from a liquid system; high point?
werwer wrote:
We have a high efficiency furnace that heats water which is piped thru a concrete slab. This is a question about air in the liquid and bleeding of the system. There is one accumulator in the system. It hangs down from the piping and I assume it has a bladder. This is what I don't understand. Why is it below the piping? If air gets into the system (which it has) it has nowhere to escape. It continues to race around the loop causing noise in the pump and flow regulation valves. Shouldn't the system's accumulator be above the piping to allow air to move into it and out of the normal liquid flow? And if the accumulator is not designed to bleed, then shouldn't there be a high point reservoir, with a bleed valve on the top? Thanks There should be a high point with a bleed valve, but I ASSume that the accumulator has a bladder in it and therefore it doesn't matter where/how you mount it. nate -- replace "roosters" with "cox" to reply. http://members.cox.net/njnagel |
#3
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bleeding air from a liquid system; high point?
"werwer" wrote in message There is one accumulator in the system. It hangs down from the piping and I assume it has a bladder. This is what I don't understand. Why is it below the piping? If air gets into the system (which it has) it has nowhere to escape. It continues to race around the loop causing noise in the pump and flow regulation valves. Somewhere there is a vent valve of some sort. http://www.taco-hvac.com/en/products...nt_category=87 or perhaps http://www.watts.com/pro/_productsFu...id=660 &ref=2 Series AS Air Separators are used in commercial and residential, hydronic heating applications to separate air from water in the piping system. They consist of a heavy, cast-iron body construction with a 1/2 in. female threaded connection for an expansion tank, and a 1/8 in. female threaded connection for a float vent. Series AS provides continuous purging and venting of air in the system when installed with Watts Model ET expansion tank and Model FV4 float-vent. Maximum Pressu 125psi (8.6 bar). If you still have air racing around the systems, something is wrong. Keep the feed valve to the boiler open also or it will just suck in more air during the cooling cycles as the water contracts. |
#4
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bleeding air from a liquid system; high point?
On Nov 18, 5:01 pm, "Edwin Pawlowski" wrote:
"werwer" wrote in message There is one accumulator in the system. It hangs down from the piping and I assume it has a bladder. This is what I don't understand. Why is it below the piping? If air gets into the system (which it has) it has nowhere to escape. It continues to race around the loop causing noise in the pump and flow regulation valves. Somewhere there is a vent valve of some sort.http://www.taco-hvac.com/en/products...ts.html?curren... or perhapshttp://www.watts.com/pro/_productsFull_tree.asp?catId=64&parCat=250&p... Series AS Air Separators are used in commercial and residential, hydronic heating applications to separate air from water in the piping system. They consist of a heavy, cast-iron body construction with a 1/2 in. female threaded connection for an expansion tank, and a 1/8 in. female threaded connection for a float vent. Series AS provides continuous purging and venting of air in the system when installed with Watts Model ET expansion tank and Model FV4 float-vent. Maximum Pressu 125psi (8.6 bar). If you still have air racing around the systems, something is wrong. Keep the feed valve to the boiler open also or it will just suck in more air during the cooling cycles as the water contracts. Yes, there is one of those. Ok, now I'll have a closer look. Thanks. |
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