coolmen

I am about to install my first tankless high eff setup.I have some basic questions on the install.I have been certified by Gama and have done plenty of service of boilers in the 20 years of hvac. I will be taking a up coming class on this system But must install this before hand.
I will hope to get some basic answers from the dye hard pros.

this system say that it must be used in a primary/ secondary pumping system.
The old tankless was simply tyed in series from what i observed.

The primary will simply run in series with it circulater and all other controls needed.
the secondary coming into the room from all baseboards series.
does this have to have its own circulater? for the secondary.
would diverter tees work or cause problems on the primary?
I may get my answers at the counter but wanted to ask you guys as well.
thanks for helping a fellow contractor out.

coolmen

The job is going very well right now . how ever I cant seem to locate/buy the 008 secondary pump. I do not want to use something differant if possible so to make a better looking job. One supply house does have it bt want $$$ for it do to me not having a account with them