Ok, the primary line has been installed, but I'm air bound in the larger boiler. Unfortunately, I forgot I had an air purge so I didn't install it in the primary line. I have it in the secondary, so my plan is to hot wire the circulator in that line and run it until I get all the air out and movement in the primary.
I do have a boiler mate tied into the primary line, and atm that is acting as my extra mass (such as it is being not much more than a coil). Even with the smaller amount of water, I'm able to hold my set point almost exactly on the low limit of the boiler (and as a consequence, never run out of DHW).
My dump zone is improperly installed atm. I either needed a check valve between the supply and return line (which at this point would be a nightmare to pipe in) or to have the primary circulator continue to run when the dump zone kicks on. Which is how the system will be wired in this week.
I doubt I'll ever hit the dump zone limit with the way the system is currently set up ( and even if I do the boiler fire will go out before any damage is done the way it works atm) however I don't want to take any chances with this part of the controls.
I won't be able to run the rads until I have a zone control installed, and that will take another week or so. But I am getting flow to them when the dump zone kicks in, so I'm optimistic.