Burnham twinned boilers on two steam coils

londonrefrig · January 15

First, thanks to those who have gone before me, i am learning much. Learn what i can when i can before the smart ones are listed in the obits.

Second, I am certified to work on the equipment I am asking about, Gas Technician 1 for my province along with steam training, etc.

I have a client who has asked me to look over his heating system in a medical office building. He isn't happy with the large company who installed and serviced the units.

Two burnham boilers 5010n (2019) and k5007(unknown). Natural gas fueled. 07 isnt running as it needs a part. Havent seen any "service" records. Both tie into steam line that ties into two steam coils stacked in series in a duct. Condensate runs into an open box which is pumped back into the boilers. Pressure is running 5-7psi. Air flow is around 20,000cfm. System was originally 1950s. Fan pressurizes a room, outlets are two 36in ish ducts, one has steam coils at inlet and second has 60 tons of ac at inlet. Still has pneumatic controls for office air controls. Steam system is entirely contained on one level in pent house.

Called in because "water is leaking every where". Condensate line blew threads on a fitting. Noticed this line has been replaced from boiler back 20ft. Called back again two days later for another leak on same line back 5-7ft from original leak. Started looking into things and realized the mess is getting neck deep. Check out the pictures.

londonrefrig · January 15

Hate long posts. The condensate return is coming in above the water line on the equalizer line and i think thats causing water hammer. Other boiler comes in lower and the line hasnt been replaced...

Piping is undersized 2in vs 3in and 4in. Not to mention the configuration is wrong. Apparently my competition cant read english. Its in the bloody manual.

Traps are leaking steam into the condensate box.

Let me know what yall think. Thanks

EBEBRATT-Ed · January 15

If the traps are blowing through that is the first concern. Steam coming back into the condensate pump/boiler feed pump will destroy the pump. The lost steam will cause excessive MU water which will rot the boilers and the return piping.

That is where I would start.

Burnham twinned boilers on two steam coils

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