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Posted by HeatPro on December 07, 2005 at 13:31:25:
In Reply to: Re: Phase III with Ergomax posted by Dave on December 07, 2005 at 12:58:06:
: : Also, a quality air vent at the top of the vertical zone distribution manifold is the stillest part of the system at times, so gathering air bubbles in a cap at the top would suffice.
Perfect we already have one there.
+++ Then you don't need a spirovent.
: 1.Taco 0010 pump pumps water into inlet of boiler. I was also going to isolate pump with a shutoff valve above it and a 2" globe valve between pump and boiler inlet for possible modulation of flow.
+++ No, don't do that, you shouldn't have a restriction in the pump inlet line; that can cause cavitation and pump damage. A balancing valve should be on the pump OUTLET line at least 6 pipe diameters away from the circulator outlet.
: 2. Water flows though boiler past flow switch and then out toward buffer tank in 2" line. It then meets a 2" checkvalve. I believe you recommended a swing check). next, it tees in a 1.5" tee to the water coming from the return manifold before entering the Ergomax E65 tank with a 1.5" tap.
+++ Yes.
: 3. Water flows through buffer tank and then out of tank through 1.5" tap, increasing in size to 2" pipe. It then meets [ ??? 2" Spirovent and ??? - not necessary with vent on vertical manifold - it is not magic ] expansion tank. A foot or so after the Spirovent, the 2" pipe tees into the 1.5" supply manifold pipe before returning to the Taco pump.
+++ Yes.
: Both supply and return manifolds would remain completely the same.
+++ the vertical manifolds removed from the horizontal primary manifold. Yes.
: The only checkvalve added to the system besides the ones already attached to the individual zone pumps would be the swingcheck on the pipe to the buffer tank.
+++ Yes.
: Did I FINALLY get everything?
+++ You have it, assuming the 60 tank is in there on the suction side of the pump or the tank somewhere.
: Dave