DocHoliday wrote in part:
This was originally confusing to me, whether he was relating his experience using a Honeywell TS with a Mod. If not, I would have liked to hear how the Mod stat handled it.With the honeywell stat, I dont know the algorithems, but No, what he is saying is, it will internally raise the set point 1 degree every 5 minutes until your new set point is reached....
O.K., let's change the scenario a little. Using the Mod stat, say that I go away for a couple of days, set the TS to hold at 55. On return, I go to 'run program' (set point: 68). Since the TS is controlling modulation, and sees a temperature differential of 13 degrees being called for, wouldn't it go to high fire immediately? If this is the case, with adaptive recovery disabled, and using the same setback, wouldn't the Mod go directly to high fire on programmed recovery?Lets make it easy using simple numbers... Lets say you have the furnace set at 60 at night and 70 in the day. (10 degrees). Lets also say you have the time set for 7am.
at 6:10ish, the set point will be 61. At 6:15 the set point will be 62 and so on. Granted, this is not the patented honeywell recovery, but it will bring the furnace up to 70 degrees at 7 am without doing it all at once and odds are that unless it's a brutally cold day, the furnace will stay in low fire for most of the time. BTW, this can be turned off too.
This is how my current furnace (recovery) is configured. On all but the coldest mornings, it'l take less than an hour to recover. I would like to be able to do the same with a Mod.