You want to extend your hot water time..looks like it's only 30 mins a day and that might be insufficient to fully heat the cylinder to 60 degrees (to ensure no legionella bacteria). If the heating happened to be in use at the same time the cylinder would almost certainly not recover (get up to temp).
The heat loss from modern cylinders is negligable and for 8 months of the year contributes to background heat My unvented is on 24/7 (and in contravention of Part L building regs).
Those 2 white Danfoss zone valves are always suspect. Unscrew the actuator heads and see if the spindles are free to turn.
The heat loss from modern cylinders is negligable and for 8 months of the year contributes to background heat My unvented is on 24/7 (and in contravention of Part L building regs).
Those 2 white Danfoss zone valves are always suspect. Unscrew the actuator heads and see if the spindles are free to turn.
