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I've attached what I think is an interesting graph.
This is a 6 story, one pipe steam system with about 90 apartments. All of the top floor apartments have thermostats(each apartment is indicated in different colors). When the average reading of the thermostats hits a temperature that we pre-set, the boiler cycle ends.
The red means the burner is firing. The grean block that it sits atop shows the period when it is calling for heat. (The yellow also means that the burner is firing but that the super has bypassed the sensor system). Notice how the red(and the yellow) are appearing in streaks as opposed to a solid block? In our other buildings, when the boiler is running it shows up as a solid block for the length of the cycle. I'm wondering if these streaks are indicative of short cycling. I also note that some of the apartment temperatures do not seem to respond to heat at all.
Any analysis/help you can give would be much appreciated.
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