Bryant M# 312AAV036070ACJA S# 1906A19772
Had been switched over to LP at installation by a previous company. They did the springs and orifices, but did not install the low gas pressure switch or spoiler screws that are to be installed in the burners. We installed the low gas pressure switch, but held off on the spoiler screws that are supposed to be installed into field drilled holes in the burners - I wasn't clear on the function of these screws and didnt want to be drilling uneseccary holes in th burners or in the wrong places. Any ideas on what the function of these screws is?
Also, when the furnace is running in second stage, flame will randomly run down inside the burner towards the orifice. This happened on all three burners at different times. Seemed to happen more (but not isolated to) when furnace was powered up with a call for 1st and 2nd stage already in place. What is it called when the flame does this, and any ideas as to what would cause it?
Inlet GP: 11
Outlet GP: low 5.85 high 10