I am installing a pellet boiler which I am tieing in to my present LP fired baseboard radiation. The PB is non pressureized. In the interest of cost and efficiency, I am depressurizing my present system and having common water in the two boilers. All elements of my present system are at an elevation below the PB, so I think I will be OK with purging and keeping the air out. I'll probably end up with about 4# of pressure at the boiler. I will remove my present air scoop.
It would seem that the simplest way to plumb it would be to tie the LP boiler into the primary loop so it is in series with the PB and do the closely spaced tee bit off that loop, feeding the zone valves. If I do a parallel type of installation, I come up with so many design scenarios my head spins. I would like to do it right the first time. I think I have a fairly straightforward design problem, but after reading all four of Dan Holihan's books, I still do not feel confident to do a design without some help! Anyone?
It would seem that the simplest way to plumb it would be to tie the LP boiler into the primary loop so it is in series with the PB and do the closely spaced tee bit off that loop, feeding the zone valves. If I do a parallel type of installation, I come up with so many design scenarios my head spins. I would like to do it right the first time. I think I have a fairly straightforward design problem, but after reading all four of Dan Holihan's books, I still do not feel confident to do a design without some help! Anyone?
