Boiler problem

John_82

sometimes high temps get used on staple ups. maybe the installer was a shoe maker...

Rich_10

Boiler problem

Went on a call today, there was no heat in the kitchen and living roon. I found no flow through the boiler, it's piped primary secondary. I checked primary pump, it was clodded, and so was the spiral vent. I cleaned the vent and circlator.
This is a radiant heated house with onix tubing, temps are set at 150+. I was wondering where this red water and slug is coming from. I checked for leaks to make sure there is no fresh water coming into system.

Thanks -- Rich

eric_26

John_82

is this the only boiler at this place? Could it possibly be an updated older ststem that could have once had cast iron rads on it? Maybe once a steam system? a bunch of rust and sludge could develope & start fouling the components of the updated system. I saw it on a job recently. An old system was upgraded, a new condensong boiler was installed. The system pump lasted 3 weeks. When it was opened, it was backed w/ iron oxide. Try flushing out the system w/ street pressure before startup.

John_82

is this the only boiler at this place? Could it possibly be an updated older ststem that could have once had cast iron rads on it? Maybe once a steam system? a bunch of rust and sludge could've developed & started fouling the components of the updated system. I saw it on a job recently. An old system was upgraded, a new condensong boiler was installed. The system pump lasted 3 weeks. When it was opened, it was backed w/ iron oxide. Try flushing out the system w/ street pressure before startup.

Rich_10

Boiler problem

This home is about 5 years old and it has radiant heat. Today I was on another job cleaning the boiler and noticed the same kind of tubing. I checked the water it seemed to have a red color to it, but not as bad as the other house. Pressure is holding on both jobs... maybe the high temps on the tubing have something to do with this problem? thanks for the help, Rich.

John_82

I looked on the watts radiant site & they claim to have a aluminum oxygen barrier. The high temps may be bad for the tubing. How old is the stuff? That tubing was once called "heatway" & there was a class action lawsuit because of it deteriorating. Heatway could never recover & was purchased by Watts & renamed "Onyx". Maybe these jobs have some of the old heatway on them. My advise is to use Pex w/ an oxygen barrier. We've been involved w/ radiant for 15 years & never had any problems w/ Pex.

Rich_10

onix

This tubing is black ,think the problem tubing was red. I will check for leaks again. I never seen radiant heat temps this high before,they must have turned them up because of lack of heat.