Nathan Davis
Member
I recently add an Aquastat 3200 and outside sensor to my Utica 200K Btu MGB boiler, and also replaced my SINGLE zone of 3" diameter hot water distribution pipes with a 3 zone system of 1-1/4 PEX pipe. This is a non-condensing boiler rated at 81% efficiency with a DOE rating of 165K Btu. The remodeled 3-zone system heats the house much more evenly than the previous single zone system. I really like the results. In a previous post, you helped me to figure out that the boiler is almost double size of what is needed.
I live in Springfield MO. Today, it is 18 degrees F outside. The boiler comes on for 5 minutes and then shuts off for 1-1/2 minutes. So that probably confirms that the boiler is larger than needed.
I'm wondering if the overall efficiency might be improved if I slightly close down the gas supply valve to reduce the size of the flame in the boiler? Conceivably, that would eliminate the 1-1/2 minute shutoff that occurs every 5 minutes.
The water temperature is set for 180. But when it gets cold like today, I also notice that the boiler steps up with water temperature in 10 degree increments until it reaches 210 F. I'm worried--that seems a little too close to 220. Should I install a shutoff to keep it below 200F?
I live in Springfield MO. Today, it is 18 degrees F outside. The boiler comes on for 5 minutes and then shuts off for 1-1/2 minutes. So that probably confirms that the boiler is larger than needed.
I'm wondering if the overall efficiency might be improved if I slightly close down the gas supply valve to reduce the size of the flame in the boiler? Conceivably, that would eliminate the 1-1/2 minute shutoff that occurs every 5 minutes.
The water temperature is set for 180. But when it gets cold like today, I also notice that the boiler steps up with water temperature in 10 degree increments until it reaches 210 F. I'm worried--that seems a little too close to 220. Should I install a shutoff to keep it below 200F?
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