We had a Burnham Steam furnace (PIN6) installed in 2012. The Honeywell Pressuretrol was set at Main .5 (1/2psi) & Differenital at 1.5. When we had the yearly service before last winter the tech set the Main at 3.0 and the Differenital at 1.5. The valves on the radiators where really hissing a lot then before almost like to much steam. My service is due soon and I would like to request the tech to adjust the settings to the original ones if this makes sense. The differential is SUBTRACTIVE.
Second question is my low water cut off is about 1/3 up on the glass water level (manual water feed) what is the recommended water level above the 1/3.
Thanks for any responses.