Permanent Standby Mode

slots" (and instead using the setback temperature all the time).

Prog stats seem to have two common MOs... Some just have multiple time zones and you select the start for each and the temperature to achieve/maintain during that time span, e.g.:

Others have a smaller number of programmable slots where you can specify start and end times for the slot. However the slots don't have to be contiguous. They also have a "setback" setting. This is a minimum temperature below which you don't want it to fall. Often you would set this to something like 10 or 15 for overnight, or perhaps 5 for frost protection. The setback setting will apply to any time that is not included in a programmed slot.

So say you had a setback set to 15, and then you programmed two slots:

The stat would then run the heating enough to maintain the above temps in those slots, and 15 the rest of the time.

I know. It is just that I fit a lot of the Siemens stats (not through choice) and the customer is only familiar with a back boiler and no controls (maybe a switch for the pump) or a coal fire.

Adam