Programmer can indicate when boiler service is due
Danfoss’s FP735Si electronic programmer can control two heating zones and hot water independently. Up to six on-off periods can be set for each channel. The pre-programmed settings will suit many households, but they are easy to change. Over-ride periods can jump to the next setting or add extra time.
These programmers can operate in 7-day mode, 5/2-day mode or 24-hour mode.
Another feature that can be set during installation is to indicate when the boiler needs to be serviced.
A holiday mode over-ride all functions during periods away and restores then to the original settings on a date pre-set by the user.