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Xringer · 05-17-11, 01:57 PM

I have a bunch of work to do on my old boiler. And replacing T&P relief valves is on the list.

Now that you mention it, I have seen some advice on how not to impede refrigerant flow. Good point!

There is a video of a 7,000 BTUh ASHP being installed here:
http://www.airgenerate.com/installation_demo.php
About 3/4 into the movie, they run a copper loop down inside the tank..

As you can see from this picture, it's a fairly long loop..

Just guessing, but if used this method, I would need a much longer R410A loop..
Maybe 3 or 4 times as long.?. Maybe too long for small ID tube.?.

I do have a few large access ports on the boiler that are not being used.
It might not be very difficult to install a large loop inside..

It would have to co-exist with the existing hot water coil.. Which isn't real small.

If it were possible to remove the coil hatch, maybe a refrigerant loop could
be hung in the center of the hot water loop.?. I wonder if they still sell
the hatch gasket for this thing?

Edge of hatch.

05-17-11, 01:57 PM	#24
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	I have a bunch of work to do on my old boiler. And replacing T&P relief valves is on the list. Now that you mention it, I have seen some advice on how not to impede refrigerant flow. Good point! There is a video of a 7,000 BTUh ASHP being installed here: http://www.airgenerate.com/installation_demo.php About 3/4 into the movie, they run a copper loop down inside the tank.. As you can see from this picture, it's a fairly long loop.. Just guessing, but if used this method, I would need a much longer R410A loop.. Maybe 3 or 4 times as long.?. Maybe too long for small ID tube.?. I do have a few large access ports on the boiler that are not being used. It might not be very difficult to install a large loop inside.. It would have to co-exist with the existing hot water coil.. Which isn't real small. If it were possible to remove the coil hatch, maybe a refrigerant loop could be hung in the center of the hot water loop.?. I wonder if they still sell the hatch gasket for this thing? Edge of hatch.