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21
6.22
EXPANSION VESSEL (see fig. 1)
Due to the compact design of this appliance,
removal and/or replacement of the expansion
vessel may require the appliance to be removed
from the wall, if this is deemed impractical, an
external expansion vessel may be fitted to the
return pipe as close to the appliance as possible.
6.22.1 EXPANSION VESSEL (removal)
Carry out component removal procedure as
described in 6.4.
Disconnect the flue from the appliance.
Disconnect the expansion pipe from the hydraulic
manifold. Locate and remove the 2 screws that
secure the vessel to the rear frame.
The expansion vessel can now be removed.
Replace in the reverse order. Ensure all seals are
in good condition, taking care to ensure they are
replaced correctly.
6.23
INPUT PCB & STATUS PCB (see fig. 14)
Carry out component removal procedure as
described in 6.4.
Refer to 4.8.2 for details on how to remove the
PCB cover. Carefully note the positions of all
connections relative to the PCB that is to be
removed. Remove the wiring and plugs from the
PCB. Locate and remove the securing screws.
Remove PCB.
Replace in the reverse order, ensuring correct
configuration of wiring.
Fig. 31
Flow-rate
restrictor
DHW heat
exchanger
Outlet securing
screw
Non-return
valve
Cold water
inlet sensor
Auto-bypass
assembly
Inlet securing
screw
Motorised valve
actuator
Locking
pin
Divertor valve
assembly
Manifold