Saunier Duval Themaclassic F30E SB Instructions For Use Installation And Servicing page 49

20.13 Heat exchanger, refer to diagram 20.7.
Before starting refer to the front of Section 20 Important
information.
• Remove the front panel, refer to Section 17.3.
• Remove the sealed chamber cover, refer to Section 17.5.
• Remove the combustion chamber cover, refer to Section
17.7.
• Drain down central heating water circuit of the boiler only,
refer to relevant part of diagram 20.1.
• Remove the fan, refer to Section 17.10.
• Remove air pressure switch sensing tube from the side of
the flue hood, see diagram 17.9.
• Release both side panels, refer to section 17.6.
• Remove the flue hood, lift up and off. When refitting ensure
the rear of the flue hood locates in the tabs.
• Disconnect the electrical leads from the overheat thermostat.
• Remove the two pipe securing clips.
• Lift to remove the heat exchanger taking, care not to damage
the insulation.
20.14 Combustion chamber insulation, refer to diagram
20.8.
Before starting refer to the front of Section 20 Important
information.
• Remove the front panel, refer to Section 17.3.
• Remove the sealed chamber cover, refer to Section 17.5.
• Remove the combustion chamber cover, refer to Section
17.7.
• Remove the heat exchanger, refer to Section 20.13.
• Pull out side insulation panels from combustion chamber.
• Tilt rear insulation panel forwards and out.
• Fit replacement insulation in reverse order to removal.
20.15 Printed circuit board (PCB), refer to diagram 20.9.
Before starting refer to the front of Section 19 Important
information.
• Remove the front panel, refer to Section 17.3.
• Lower the control panel, refer to Section 17.4.
• Gain access to rear of control panel.
• Undo and remove the two front retaining screws.
• Hinge up the control panel cover and ease forwards from the
rear retaining lugs to gain access to PCB. Do not strain the
cables attached to the PCB. Note the routing of the cables.
• Carefully pull off electrical connections to PCB.
• Unclip and lift out PCB.
• Fit replacement PCB in reverse order to removal. Be careful
not trap any of the cables.
Make sure that PCB connections are fully pushed onto
replacement PCB.
20.16 User interface board, refer to diagram 20.10.
Before starting refer to the front of Section 20 Important
information.
20 Replacement of Parts
• Remove the front panel, refer to Section 17.3.
• Unclip control panel user interface and hinge forward . Do
not strain the cables.
• Disconnect the electrical connections from the user inter
face board.
• Remove the two user inter face board retaining screws.
• Remove the user inter face board.
20.17 230V Controls board, refer to diagram 20.10.
Before starting refer to the front of Section 20 Important
information.
• Remove the front panel, refer to Section 17.3.
• Unclip control panel user interface and hinge forward . Do
not strain the cables.
• Disconnect the electrical connection from the 230V controls
board and the electrical connection from printed circuit board
(PCB).
• Remove the 230V controls board retaining screw.
• Remove the 230V controls board.
20.18 Mains switch, refer to diagram 20.10.
Before starting refer to the front of Section 20 Important
information.
• Remove the front panel, refer to Section 17.3.
• Unclip control panel user interface and hinge forward . Do
not strain the cables.
• Remove the mains switch.
• Disconnect the electrical connections from the mains switch.
(F30E/F30ESB shown)
49
INSULATION
Diagram 20.8
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