Posted by BoilingMan on October 26, 2001 at 10:07:09:
In Reply to: Instant Highfire! posted by Robert on October 24, 2001 at 10:06:22:
What are you talking about? What "preset"50%?
In Auto mode Firing rate is controlled by pressure sensor, like "Pressuretrol", and if actual pressure in the boiler is lower than set on the pressure sensor Burner will go first to
Max.Fire then gradually go down antil it will reach some balance.
That "preset on the modulator comtrol works only in manual mode.
Good luck!
: I have a Cleaver Brooks 125 hp firetube boiler generating 100psi steam. This morning I discovered that after blowing down boiler and after prepurge boiler came on line as normal but went to 100% fire even though it was set to only go to 50%. In automatic mode it is bypassing the preset setting (ignoring it) and continuing to 100% fire. When I switch to manual mode it will stop at the preset mode of 50% fire. Where should I start looking for the problem? Modulator motor?