loss of heat

penray

at work one of our  units is not heating well exchanger gets hot flap on trap moves unit is also lower so it has a pump to move condensate up pipes seem hot too

any ? on where to look

nicholas bonham-carter

Heat exchanger problem

I presume this is a steam to air heat exchanger, and since it seems lower than the supply pipe, then how is the air getting out for the steam to enter. The condensate pump will only handle the liquid. If there is some provision for main venting of the coil, could the pressure have risen to the point where it will not function.--NBC