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4000122704-1
20 Replacement of Parts
20.33 Igniter unit, refer to diagram 20.22.
Before starting refer to the front of Section 20 Important
information.
• For ease of access remove the right hand side panel, refer to
Section 17.6.
• Disconnect electrical connections.
• Remove ignition unit securing screw.
• Pull upwards to release and remove the ignition unit from the
retaining slot.
20.34 (F30E Only) Domestic hot water plate to
plate heat exchanger
Before starting refer to the front of Section 20 Important
information.
• Remove the front panel, refer to Section 17.3.
• Lower the control panel, refer to Section 17.4.
• Drain down the boiler only ,refer to relevant parts of
diagram 20.1.
• Remove the water flow sensor, refer to Section 20.24.
• Unclip the central heating thermistor.
• Unscrew the heating flow pipe union nut, swing pipe forwards.
• Remove the system water pressure sensor, refer to Section
20.25.
• 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 in reverse order
to removal using new seals, supplied.
Note: Plate to plate heat exchanger mounting screws are offset
to ensure correct fitting.
Diagram 20.23
9774
➜
➜
➜
➜
DOMESTIC HOT WATER
PLATE TO PLATE HEAT
EXCHANGER
9775
Diagram 20.22
9767
IGNITER
UNIT
➜
➜
➜
➜
F30E Only
