Does this look right?

Ron Root

Over 98% of our business is forced-air (residential). After repairing a Garage unit heater, The customer asked me to check a smell in the equipment room. It was a dry drain, and I poured a bucket of water in it. While there I noticed one boiler would fire, water temp reached 175 and went off on limit, then the other boiler would fire and do the same. This process repeated over and over. This is a new customer, and I didn't want to ask the foreman to come out and cause a problem for the contractor that installed these boilers with the customer, as I'm not that knowledgeable in hydronics (I'm learning through this site and Dan's books). We've been so busy I can't seem to hook up with the foreman, my printer is not good enough to leave the shots for him, and I would have to request dispatch send him out. I always have a camera with me to record any steam or hydronic system I see. Any feedback would be appreciated. Thank you.

Floyd

No, definetly not...

It is hard for me to tell what's going on there from those pictures.
But, a few observations from what I can see....

The piping defintely looks too small for all those circs. and the size of them,
there has to be some noise from the high velocities in those pipes.
I'm not sure that they are even piped right, but can't really tell.
Also, how are they being controlled...sounds like there may be some
control issues there.

I would definetly get it looked at.....they probably aren't working as efficiently as they could be.
Get a Tekmar on them for reset and boiler sequencing....the people and the boilers will love you!!

Floyd

Mark Eatherton1

I agree...

many things don't look right. I see at least one small pump in series with a larger pump. Any chance you can make us a diagram of the near boiler piping?

ME

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Gary Usa_2

not sure

hiya,i couldn;t see any ballvalves or purge valves in the system,extrol tank where is that hiding.on the pressure relief valves should have been a compression fitting so that it can be changed alot easier when it leaks.noted that all the pumps are on the return,is their a flue break damper within the flue.the headers don;t look central to the header,if possible please would you be so kind to draw the close boiler piping out for us.the pipesiszing looks abit small,if you could be so kind to put a drawing on would make it alot clearer

take care

all the best

gary usa

Mark R Grant

Looks like you have a Tekmar Already.

From what you desribed and from the sensor on picture#1 you have a Tekmar or something similar already. This control is made to Lead Lag the boilers so that in milder weather you make use of each boiler equally and it stages them in the colder weather to get more capacity. Tekmar has a lot of info available to study up on their products. I like them also.

John Jr

Re-pipe

From what I see the boiler supply lines coming out of the boilers are wrong. They need to be spaced the same coming out and going to a tee for both the supply and return.

John Jr