Noise from Steam Risers/Branch lines

LFsuper

Hi,

I manage a new construction, large residential building. Apartments heated by steam coil (PTAC units) Steam operates with a vacuum system on a 2 pipe system. We have good vacuum (-15 Hg), All equipment is 3 years old. Our issue is noise from the wall even when a tenant may not have their heating unit running ( some even 17 floors up so no whwere near the trap). Occasionally getting a popping, banging noise that eventually goes away but returns later.

Boilers set at 6 psi. Main electronic valve position dictated by outside temp ( I have dialed back the compensator as I feel we were overheating and actually blowing through the Erie actuator valves on the PTAC units)

Any help appreciated.

Jamie Hall

Probably expansion noises. These can be hard to track down -- and even harder to fix, particularly if it's in a wall or chase where a riser is sticking against something.

LFsuper

Right, I think this is exactly the issue. Possibly made worse with poor insulation or any exposure to elements?

nicholas bonham-carter

Any setbacks in temperature will increase the expansion and contraction of the pipes, resulting in more noise, and fuel consumption.--NBC