Tom the combustion analysis process is exactly the same on them big boilers except if you have to adjust the primary air then messing around with those jack shafts can get tricky to damn near impossible.
Could be multiple problems. If it is a recent issue, could be the regulator itself going bad, but if it has always done it, it could be an undersized orifice in the regulator causing the pressure to go down when the demand for more gas is needed. Had an issue with that on a 4 stage humidifier, gas pressure would dip with each stage. Once we put in a larger orifice in the regulator, the pressure remained the same with all stages firing.
@@tcphvacr9950 where is the best place to check gas pressure on downstream of the gas pilot valve? I have one that is not lighting the pilot. Want to make sure it’s not the gas pressure regulator on the pilot gas train.
If you have a call for heat and voltage to the gas valve but no response. Valves like this usually have a pilot valve as well, and if your pilot won’t light, same process, check and see if voltage is being sent to it when the ignition process starts (after purge timing, etc.)
Tom the combustion analysis process is exactly the same on them big boilers except if you have to adjust the primary air then messing around with those jack shafts can get tricky to damn near impossible.
***** yeah if you have never done it you could be screwed!!!
***** true.
Thanks 👍
Nice one. Just wondering why the pilot got out of alignment unless it was not align property to begin with
Usually what happens is a previous tech had it apart for another reason, and probably knocked it out of alignment.
What is the problem if your fuel regulator pressure always up and down? seeing in the pressure gauge. thank you
Could be multiple problems. If it is a recent issue, could be the regulator itself going bad, but if it has always done it, it could be an undersized orifice in the regulator causing the pressure to go down when the demand for more gas is needed. Had an issue with that on a 4 stage humidifier, gas pressure would dip with each stage. Once we put in a larger orifice in the regulator, the pressure remained the same with all stages firing.
Are you familiar with the Cleaver Brooks?
I haven’t worked on them since 2006, but the power burners on other boilers are very similar. I’m talking about a fire tube steam boiler.
@@tcphvacr9950 where is the best place to check gas pressure on downstream of the gas pilot valve? I have one that is not lighting the pilot. Want to make sure it’s not the gas pressure regulator on the pilot gas train.
How do you know if you have a bad gas valve?
If you have a call for heat and voltage to the gas valve but no response. Valves like this usually have a pilot valve as well, and if your pilot won’t light, same process, check and see if voltage is being sent to it when the ignition process starts (after purge timing, etc.)