NG Boiler configuration for efficiency
Earlier this fall we had a contractor replace our 50+ year-old Burnham Jubilee oil-fired boier with a natural gas fired Peerless Pinnacle P-140 and indirect-fired hot water tank. See http://www.hvac-talk.com/vbb/showthread.php?t=160543 for some background.
So, at this time, I am curious as to how to be certain that the P-140 is configured for maximum efficiency. Should I just assume it is so, or would anyone suggest tweaking a few settings?
We are located in Connecticut's "northwest corner", a house built in the 1920's of al brick construction. Standing cast-iron radiators in most rooms, cast-iron baseboard in the living room only.
The P-140 is currently set as follows:
Supply set point ("C") = 180 deg F
Set point differential ("Ch") = 30 deg F
("dE") = 119
("dH") = 7