Another question re Anticipator

mckern_4

I’ve browsed/read through the 200 returns I received with I search “anticipator” and I still need some help with this.

Longer cycles means more variation in temperature, right? What is the usual variation (w/o anticpator)?

It seems that 2 cycles/hour is frequently recommended for steam. So, if you’re set for 2 cycles per hour: A. the first cycle runs until the thermostat is satisfied. B. Thirty minutes later, IF the thermostat is calling for heat, the boiler will fire again. C. If not, the boiler will fire when the thermostat calls for heat. D. Back to A. Right?

Wouldn’t 2 cycles/hour be too frequent for mild (e.g. 50 degree) weather because cycles would be separated by hours. The boiler would simply fire based on the thermostat/temperature, so the benefit of longer cycles would be lost. (?)

We have a White-Rodgers F90W-71 with anticipation settings from 2 to 40, a minimum anticipation setting of 15 is recommended. Any advice regarding appropriate setting for one-pipe steam?

Finally, is the anticipator function also intended to prevent the system from overshooting the thermostat setting?

Thanks for any help with this

mark ransley

Im no pro but pay the heating bills and this is my take on it. Short cycles waste energy and are harder on equipment. Steam takes a long time to reach full efficiency so the longest cycle is best. If anticipator is narrow the temp stays constant, if it is to wide you get cold before the heat goes back on. It is a matter of comfort and logic. You dont want 5-10 minute cycles, and you dont want to get cold before the boiler refires. But with a 2f swing or more, getting a bit cool and running a bit over will give you the longest cycle, save you energy by allowing the boiler to run longer at higher efficencies and put less wear and tear on controls over the years. Try a 1 hr cycle and see, it is getting warmer out. Experiment with anticipator by your comfort. This would also relate to where a 1-2 degree night setback will save money, Longer boiler cycles are more efficient and will cost you less.