marky
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Posts: 7
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« on: May 31, 2007, 11:05:34 PM » |
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Hi there,
I have just brought, and built an integrated thermal store tank and evacuate tube panel from Navitron. Everything works fine, even in todays cloudy weather I was surprised by the warmth of the water I acheived. Really pleased.
The only problem is where the copper coil outputs the tank, I am unable to seal the joint. Should this be left to vent water when it expands?
I just wanted to ask, before I do anything drastic to stop the leak !!
Many thanks
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martin
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« Reply #1 on: May 31, 2007, 11:41:19 PM » |
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I'm a bit confused here - mine's got two pipes on one end of the tank, and one on the top of it - I've got mine configured so that cold goes into the bottom connection on the end, the hot water output from the top one on the end, and the top one connected to a piece of pipe heading upwards to end up higher than the cold water tank, and bent over to exit into it, to allow for expansion. If you just seal the top connection, sommat's got to give - the tube seals would probably leak!  |
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marky
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Posts: 7
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« Reply #2 on: May 31, 2007, 11:48:33 PM » |
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Hi Martin,
Sorry, mine's got a coil in it that the mains cold water goes through. This picks up the heat from the water in the tank. Therefor I get mains pressure hot water.
I have an inlet and outlet for the coil. 2 holes into the cylinder for filling and to fit an expansion vessel to, and a hole underneath the cylinder (presumably for draining).
It is the seal around the copper coil outlet that leaks. anyideas apart from soldering as to how to deal it. It has a brass nut fitting, but there is a gap aroung the tube, and tightening the fitting doesn't make a difference.
Many thanks
Mark
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O MidKnight
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« Reply #3 on: June 01, 2007, 02:15:06 PM » |
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First - do not try soldering
Second is it a backnut with a washer?
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Solar heating - makes you feel good when you open the hot tap and when you look at your heating bill
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marky
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Posts: 7
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« Reply #4 on: June 01, 2007, 03:29:04 PM » |
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Hi,
It is a backnut, but there is no washer. The pipe is just loose to wobble about in the nut.
Problem is the end of the tube is splayed out to accomodate the end fitting, so I dont know how I can get a washer small enough over the end.
Any help please!!!!
thanks
Mark
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O MidKnight
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« Reply #5 on: June 01, 2007, 05:03:23 PM » |
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marky how about the other coil connection - Is there a washer there?
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Solar heating - makes you feel good when you open the hot tap and when you look at your heating bill
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marky
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« Reply #6 on: June 01, 2007, 06:49:23 PM » |
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Hi,
No washer in either end. Water can escape at the nuts bot ends, but predominantly it is just on the one side.
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ajstoneservices
Guest
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« Reply #7 on: June 01, 2007, 07:38:10 PM » |
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is it meant to be a flared joint, is that what you mean by splayed? if so you cant use a standard compression fitting.
a photo would help.
tony
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O MidKnight
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« Reply #8 on: June 01, 2007, 10:39:48 PM » |
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Crikey marky you bought and fitted the tank really quick!
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Solar heating - makes you feel good when you open the hot tap and when you look at your heating bill
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Muwit
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Posts: 3
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« Reply #9 on: June 12, 2007, 10:22:19 AM » |
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Hi Marky,
I have been waiting to find out if you fixed it and how well it works? I would also be interested to know how you are making use of the heat exchanger, to a thermal store or straight to the hot tap?
Thanks
Chris
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O MidKnight
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« Reply #10 on: June 12, 2007, 11:07:27 AM » |
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Yes me too. What happened about that leaking coil connection?
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Solar heating - makes you feel good when you open the hot tap and when you look at your heating bill
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marky
Newbie
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Posts: 7
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« Reply #11 on: June 18, 2007, 10:04:55 PM » |
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Hi Guys,
Sorry for not getting back, but have been away.
I lowered my expasion vessel on the tank, and it stopped leaking from the coil/ tank connections !!
I have found out that this is a feature to stop the tanks exploding, so therefore in extreme temps, small amounts of water may escape.
Even though this unit is designed for hot countries, we have had 2 showers from it today and there has been a total of about 30 minutes sunshine.
Very pleased with this affordable unit.
Many thanks for all of your help
Marky
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