Technical data

necessary.
With the system at the temperature set by the heating
temperature control, on the facia, the burner will modulate to
maintain the required output to the system.
If the system no longer requires heat to maintain the desired room
temperature, the burner will extinguish. The pump will continue
to run for about four minutes to dissipate the residual heat from
the appliance through the CH circuit and then switch off.
When there is another heat demand the operating sequence will
re-start. If the primary temperature is greater than the
temperature control setting then there will be an anti-cycle
period of three minutes.
HOT WATER AND CENTRAL HEATING MODE:
The appliance will supply heat to the central heating system as
required. A demand for hot water at a tap or shower will override
the central heating function for the period of the hot water
demand.
When hot water is no longer required the burner and pump will
continue to operate until the heatbank is back to the required
temperature.
The appliance will then return to the central heating state and its
normal mode of operation.
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Fig. 1. Appliance water flow diagram.
1. Mains Cold Water IN 12. Tank Sensor 23. Pressure Relief Valve
2. Water Filter 13. Heatbank Overheat Thermostat 24. Manual Air Vent
3. Flow Turbine 14. Heatbank (Capacity 60 Litres) 25. Water Manifold (Top Section)
4. Automatic Air Vent 15. Drain (Primary Water) 26. CH Flow Valve
5. Water Flow Regulator 16. Circulating Pump 27. CH Return Valve
6. C.H. Primary Sensor (Front) 17. Drain (Secondary Water) 28. Central Heating Flow
7. Appliance cabinet 18. Open Vent Connection 29. H.W. Sensor
8. Gas to Water Heat Exchanger 19. Water Diverter Valve 30. Central Heating Return
9. Safety Temperature Limiter (Rear) 20. Water Manifold (Bottom Section) 31. Domestic Hot Water OUT
10. Inner Casing 21. Water to Water Heat Exchanger
11. Sealed System Expansion Vessel 22. By-Pass Adjuster
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