We recently had a Burnham Model ESC4NI 85% efficient cast iron boiler installed, along with a Burnham card for an outdoor reset control.

It's has four zones, however, we typically just heat the zone we're in and leave the others set at a low temp all the time. I've noticed it tends to run often for a short time which is not unexpected for the way we're using it. We used to have a hefty night setback, but the installer set it for 5 degrees. It does a great job keeping the place warm, and we're happy with it. The only glitch in the system is that the pressure is high (20/26) but was told that's OK.

Are there any modifications, add ons, settings or other things that will make this system run more efficiently?