Heat Engine Replacement - IDEAL istor HE260 Installation And Servicing

93 HEAT ENGINE REPLACEMENT

Refer also to Frame 10 - 'Boiler exploded view'.
To replace the heat exchanger it is necessary to separate the
boiler module from the tank module.
1. Remove the front panels. Refer to Frames 53 and 54.
2. Drain the boiler. Refer to Frame 85.
3. Remove the DHW expansion vessel. Refer to Frame 55.
4. Remove the control box. Refer to Frame 76.
5. Undo the 3 water connections joining the boiler module to
the tank module.
6. Undo the gas connection.
7. Undo the 2 screws securing the boiler module to the tank
module.
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8. Release the flue from the flue turret.
9. Remove the turret from the boiler.
10. Lift the boiler module off the tank module.
Remove the back panel and place on its
back.
11. Remove 3 top and 2 bottom screws on
each side panel to remove side and top
panels.
12. Undo the 3 back nuts on the water
connection and the back nut on the gas
connection.
13. Undo the 4 screws securing the bottom
panel to the boiler and remove the panel.
14. Undo the CH expansion vessel hose from
the return pipe. Refer to Frame 94.
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Installation and Servicing
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15. Using a suitable tool undo the push fit connections from
the flow and return pipes of the boiler removing the
pump assembly and the diverter valve assembly.
16. Remove the fan / venturi assembly and place on one
side. Refer to Frame 65.
17. Remove the burner and store safely. Refer Frame 67.
18. Remove the ignition and detection electrodes. Refer to
Frames 69 and 70.
19. Undo the M5 x 10 screw retaining the top flue manifold
casting and remove from the boiler.
20. Unscrew and remove the automatic air vent complete
with the adapter.
21. Release the silicone tubing from the sampling point.
22. Release the electrical connection to the flue sensor.
23. Undo the 4 M5 x 10 screws securing the bottom flue
manifold casting and remove.
24. Remove the edge clip securing the flue sensor wiring.
25. Remove the blind grommet to gain access to the return
pipe securing bracket.
26. Undo the M5 screw and remove the return pipe securing
bracket by sliding forwards.
27. Remove the securing pin to release the return pipe.
28. Undo the 2 M5 screws securing the interpanel to the
back panel.
29. Slide the heat engine and interpanel assembly upwards
to disengage and remove from the casing complete with
the return pipe.
30. Undo the 2 M6 countersunk screws, remove the
interpanel and transfer to the new heat engine.
continued . . . . . . . .
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