Saunier Duval Themaclassic F24E Instructions For Use Installation And Servicing page 50

18.32 (F24E Only) Three-way valve actuator,
refer to diagram 18.21.
Before starting refer to the front of Section 18 Important
information.
• 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 part of diagram
18.1.
• Remove the gas control valve, refer to Section 18.28.
• Remove 3-way valve head, refer to Section 18.31.
• Remove the three way valve actuator.
18.33 Ignition unit, refer to diagram 18.22.
Before starting refer to the front of Section 18 Important
information.
• Remove the front panel, refer to Section 15.3.
• Lower the control panel, refer to Section 15.4.
• For ease of access remove the left hand side panel, refer to
Section 15.6.
• Disconnect electrical connections.
• Remove ignition unit securing screw.
• Pull upwards to release and remove the ignition unit from the
retaining slot.
18.34 (F24E Only) Domestic hot water plate to
plate heat exchanger
Before starting refer to the front of Section 18 Important
information.
• Remove the front panel, refer to Section 15.3.
• Lower the control panel, refer to Section 15.4.
• Drain down the boiler and hotwater circuit ,refer to relevant
parts of diagram 18.1.
• Unclip the central heating thermistor.
• Unscrew the heating flow pipe union nut, swing pipe forwards.
• Remove the gas supply pipe between the gas control valve
and injector bar, see diagram 18.23.
• Disconnect the union connection from the expansion vessel.
• Supporting domestic hot water plate to plate heat exchanger,
unscrew and remove two screws securing it onto pump
mounting and 3-way valve/bypass housing.
• Remove plate to plate heat exchanger from boiler.
• Fit replacement plate to plate heat exchanger.
Note: Plate to plate heat exchanger mounting screws are offset
to ensure correct fitting.
4000124050-2
18 Replacement of Parts
F24E only
F24E shown
50
DOMESTIC HOT WATER PLATE TO
PLATE HEAT EXCHANGER
EXPANSION VESSEL
Diagram 18.23
Diagram 18.24