Central boiler hookup?

[Hunt4lumber]

So I have a new/older model never used central boiler and my house has a boiler inside already.
What can I do ahead of plumber to speed up the hookup?
My brother is a licensed plumber, but he has minimal time to hook it into house.
Outdoor unit is set, pex line is ran fro there to basement, but I will need to extend it some 65' to my current indoor boiler...
Thanks for input guys...

 

[husqvarna257]

I assume that you ran Thermopex outside and that it is buried? If this is correct do you have line run into the basement and are you running a thermostat that is just inside the house? I would run the line right up to your boiler and look at where you will connect it and get all the fittings. How is the elevation from the boiler to the house and how many stories is the house? You may need a heat exchanger for your set up. Central boiler has hook up instructions online' look at that. Once you have all that and all the parts you need see if your brother will come by to check on your work and partsto see what may be needed.