Expansion tanks for proper functioning and pressures
Blow down valves and the manufacturers recommendation for blowing the system down
Water quality and cleanliness
Leaks in the piping and piping insulation
Relief valves PRV or Pressure Reducing Valves for calibration of proper pressure
Backflow devices (usually a code requirement) tested by a qualified or licensed back flow tester
All controls and gages within the system.
Are the gages accurate and do the controls function when needed?
Combustion analysis on the combustion process whether the system is gas, oil, or both.
Zone valves and actuators tested for proper function and when closed the do not allow water to pass.
This includes three way valves and modulating valves for proper functioning and control.
Circulator pumps should be checked for proper lubrication along with proper alignment of coupling device.
Coupling device should be checked for wear and tear.
Finally, all wiring should be checked for proper attachment, fraying, and corrosion.
It’s a good time to test the phase monitor also to ensure it works as designed and installed.
Good boiler maintenance by qualified boiler maintenance personnel will lead to less breakdowns which means more reliability and happier customers. It will also help efficiency because of better fuel economy.
Take boiler maintenance seriously and you will enjoy the benefits of a safe and reliable heating season.