Munchkin (pumping away primary)

Kritz_3

Hey if you get a chance take a look at H.T.P. (Munchkin) installation drawing 1c. They have a pump on the return side of the primary loop going into the boiler then the air seperator/fill/Ex tank leading to the circulator supply header. Is this correct or since the tee's are closely spaced that lazy H2O won't want to burden the rest of the system with increased pressure? Couldn't you put the closely spaced tee's down stream of the air sep..... and flop the pump to the supply side pumping away from the boiler, then the point of no pressure change would be at the Ex tank. Am I having problems seeing the forest through the trees or am I barking up the wrong tee?

Kritz

john wood

Pri/Sec?

If you are using a pri/sec type system, the hx in boiler is highest resistance to flow. xp tank should be at inlet of pump. The rest does not really matter.

By keeping hx at higher pressure, you keep h2o from flashing as easily and also have less chance of tripping low pressure switch on manifold. Also better chance of self purge of air as circ pumps don't suck, they push.