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Modulating Pressuretrol - how should it work and be optimized
below is a modulating pressuretrol device (with bellows)
how should this be set? ie. does the modulating pressuretrol change the burner firing rate depending on the pressure in the boiler?
this boiler always fires at the same high fire rate with no variation as pressure builds in boiler.
i am concerned that frequent start up of a cold boiler with a high fire rate may be thermally stressful to boiler (ie. steam boiler used only a few times a week) - and that a slower warm up may be of benefit. It has been recommended to install a low fire hold device.