Water boiler temperature for best efficiency
I have a weil-mclain cg-5 series 12 water boiler in my basement, and am trying to maximize the efficiency.
The way it is currently wired, when there is a demand for heat from thermostat, the boiler kicks on and once the water temp reaches about 145 degrees, the circulator will turn on. When the circulator starts running, the temp slowly drops over about 30 seconds back down to about 120 degrees and then circulator will shut off. The water temp will rise back up to about 145 again, circulator will turn on, temp will drop to 120 and the cycle continues.
The gizmo that adjusts these settings is some kind of Honeywell thing, and there are two settings I can adjust:
#1 - The temp that circulator shuts off at (currently 120), and
#2 - The difference (how much hotter) above the shut off temp before it turns back on (currently set to max of 25 degrees).
I have read that boilers are more efficient at hotter temperatures. Should I adjust any of these settings to improve the efficiency?