Internal view

Key to components

1. Control panel

2. Tank over heat thermostat

3. Tank temperature sensor

4. Heat store

5. Plate DHW heat exchanger

6. Filling loop isolation valve

7. Water flow sensor turbine

8. Expansion vessel

9. Circulating pump

10. Gas valve

11. Heat cell

12. Gas burner/spark electrodes

13. Combustion air modulating fan

14. On/off button

15. Central heating temperature control

16. Digital display

17. Domestic hot water temperature control

18. Pressure gauge