Where is your setpoint manager located? You should be able to maintain a constant temperature on the supply outlet branch. At constant flow, this means that your loop temperature differential will vary.
-- Karen
On Friday, April 27, 2012, jvd2pe <jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > > Dear Forum, > I think I figured this out sometime ago, but have forgotten what I did?..
> ? I have a PlantLoop with 2 boilers and a Bypass > ? I am using "CommonPipeSimulation" in my PlantLoop definition in order to incorporate a secondary / demand side pump. > ? E+ does not like supply side variable speed pumps when CommonPipe is used, so I am using a constant speed pump (P1) on the inlet branch.
> ? B1 and B2 do not run continuously. B1 runs most of the time and B2 operates only when B1 cannot carry the load. > ? Since P1 runs continuously at constant speed, the water temperature leaving the Supply Outlet is diluted ? it's a blend of the B1 outlet temperature and the remainder of the flow, which goes through the bypass.
> ? I don't want diluted outlet temperature! (It's degrading coil performance on the demand side) > > Suggestions, please! > p.s., If I get that part solved, the next step is to figure out how to make P1's power vary with flow.
> p.p.s., I tried to send this twice previously, but it has not shown up, so I'm trying again.... > >