I've been learning about primary-secondary boiler systems for my home, and have landed on a two-boiler system (two apartments), very much like Siegenthaler describes in his illuminating book and here in Radiant and Hydronics.
In order to save space I want to introduce a couple of bends into the primary loop, what's the effect? The rails are intact but they don't feed directly into the separator as before. Go/no-go?
In actuality these two boilers are installed along a basement wall with two manifolds extending several feet to the right of the hydraulic separator. Why not use some of the Z-space?