I have a gas fired hydronic heating system. I just relocated a baseboard radiator during a bath remodel. I drained the system, cut into the existing overhead piping, and reconfigured the piping to get where I needed it. I have a two pipe system, but it tees off three times, one taking care of the first level (which works fine), one tee going to the second floor bedrooms/ bath/ and looping back down to the lower level (split level house). the third tee is solely the bathroom radiator that I relocated. The pump is running, the water is 180 deg, the pressure is about 18-20 psi, but the only area heating up is the first floor. I have bled all the air out of all baseboards, but the two loops are not heating up. Any help will be greatly appreciated, 'cuz my wife is gonna kill me if I dont A) get the bathroom remodel done, and B) get the heat working soon.

How would you hook this up? buderus 215 buderus indirect dhw taco RMB 4 zones of in slab heat I want my RMB to control my boiler with outdoor reset. to get water hot enough for the DHW i would pipe that circ pump in before the RMB. I do not want to wire the DHW demand through the RMB because if it senses a demand it will start mixing water for my floor heat. If i hook the DHW aquastat directly to the boiler i bypass the RMB sending it all the way to 180 no matter what the temperature outside is. I also lose priority not having the DHW circ wired to the radiant switching relay. what would you do? my 2 ideas are 1) hook the dhw aquastat to a switching relay that is hooked to the dhw circ pump. this wouldnt be connected to the boiler or turn on the boiler when it started circulating but the RMB would kick on the boiler when the temp started dropping just as it would with normal heat loss not running for a long period, giving the RMB total control. 2) same as above but have both the DHW demand and the RMB demand hooked to the boiler. When the RMB calls for heat it will heat the boiler to its calculated temp. When the DHW calls for heat it shoots up to 180 regardless. To me it seems like bypassing the RMB would make me lose some efficiency but then again maybe that boiler always needs to be at 180 to heat that tank of water up...i dont know, im no boiler technician. THANKS!