Solar heat to boiler conversion.

Tom, I am still trying to figure out the best way to plumb/ integrate this system into my existing system.  Since, my Heliodyne system comes with two heat exchangers, my thought was to use the Sonnenkraft Solar Hot Water Module for my domestic hot water.  It has a single circulating pump incorporated into the module, which I assume is used for circulating water and not for circulating the glycol in the solar loop?  At any rate, my thought was to plumb the cold supply to this module and run the hot out from the  solar storage tank to the amtrol.  Next, for the radiant floor heat, my plan was to bypass the amtrol altogether.  My thought was since the H-pak has two circulating pumps (one for the solar loop and one for the radiant heat system??) that I would plumb the hot output from the H-Pak into the line from the boiler that supplies the floor zones.  I would then plumb the return from the floor zones into the cold input on the H-pak.  I would accomplish this using a couple of T connectors and install valves so that either the boiler or H-pak could be used to heat the floor space depending on my needs.  I am wondering however, if the circulating pump on the H-pak will be able to provide the function of circulating hot water to and from the radiant floor system?  I am also wondering if this is the best way to accomplish this, or if I would be better off just using the circulating pump on the H-pak to circulate hot water from the solar storage tank to the Amtrol and back?  The later seems like this would be duplicating the funtion of the Solar Hot Water Module mentioned earlier?  Also, I can't figure out how else to accomplish a DHW temp of 120 and a radiant floor temp. of greater than 120 while using the Amtrol for both?  Does any of this make sense?

charles, a little confusing. First, you say the heliodyne  has two heat exchangers. Are you talking about a tank that has two coils inside it? Or is there external piping with two pumps plumbed in acting as a heat exchanger? If it is external, then one loop/pump should be hooked up the panels and the other to draw domestic water from the solar tank.
 Also the "Module", are you talking about the hot water panel that goes outside in the sun? And it sounds like it has it's own integrated pump?
 Do you live in a zone with freezing temperatures? If so then there has to be some glycol in the system somewhere. Usually in the loop heading out the the panels. Then this loop should be connected to part of the heat exchanger.
 If you plan on using radiant heating, it is best to tie this into the same loop that goes out to the panels instead of trying to rob domestic hot water straight from the tank. Then you can isolate/control the radiant heat zone and the hot water zone using valves. Basically it comes down to take the heat you can get rather than trying to maintain a certain temperature limit.
 Doesn't make sense to circulate water between the tanks.