Saunier-Duval-Thema-Classic-F24e-Installation-manual

18 Replacement of Parts18.35 Expansion vesselRenewal of the expansion vessel requires the boiler to beremoved from the wall. As an alternative, a separate expansionvessel of the same specification may be connected as close aspossible to the boiler, leaving the original in position, refer to theinstallation instructions.Replacing the expansion vesselBefore starting refer to the front of Section 18 Importantinformation.• For this operation the boiler must be removed from the wall.• IMPORTANT: With regards to the manual handling operations,1992 regulations, the following operation exceeds therecommended weight for one man lift.• Remove the front panel, refer to Section 15.3.• Lower the control panel, refer to Section 15.4.• Drain down the boiler only ,refer to relevant parts ofdiagram 18.1.• Disconnect the flue system.• Disconnect the fixing jig connection pipes at the boiler.• Disconnect the pressure relief valve discharge pipe.• Disconnect the mains cable and any external controls cables.• Lift up to remove the boiler from the wall.• Remove sealed chamber cover, refer to Section 15.4.• Remove the right hand side panel, refer to Section 15.6.• From the rear of the boiler, unclip wiring harness retaining wire.• Undo pipe coupling on expansion vessel.• Unscrew and remove expansion vessel bracket retaining screw.• Slide expansion vessel to the left and forward to remove.Note: Check that expansion vessel pressure is correct, see‘Section 1 Technical Data’.9873➜F24E shown Diagram 18.24FRONTPANELEXPANSIONVESSEL987298711143618.36 Sealed chamber cover seal, refer todiagram 18.25Before starting refer to the front of Section 18 Importantinformation.• Remove the front panel, refer to Section 15.3.• Remove the sealed chamber cover, refer to Section 15.5.• Remove the old seal, thoroughly clean the casing. Fit the newseal, it is supplied to the correct length.Note: Ensure the seal is fitted correctly giving an air tight seal.SEALSEALEDCHAMBERCOVERDiagram 18.2551 4000124050-2