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23
Disconnect the flexible expansion pipe from the
vessel. Locate and remove the four screws (A)
that secure the vessel top holding plate (B),
remove the plate (fig. 32). 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.
6.27.2 EXPANSION VESSEL REMOVAL (with insuf-
ficient clearance above)
Carry out component removal procedure as de-
scribed in 6.4.
Disconnect the flexible expansion pipe from the
vessel.
Disconnect the flue elbow or pipe from the appli-
ance flue outlet. Unclip and remove the air cham-
ber cover, gently pull the cover towards you
before lifting and disengaging. Remove the RH
side panel of the air chamber. Disconnect the
wiring to the fan, pressure switch, primary ther-
mistor, overheat thermostat, condense switch &
spark electrode, taking note of their locations.
Carefully unclip the wires from the air chamber
and withdraw the wiring & grommet from the air
chamber.
Disconnect the outlet gas pipe, the flow & return
pipes and the condense pipe from the air chamber.
Locate and remove the 2-screws that secure the
lower section of the air chamber. Locate and
remove the 2-screws that secure the upper sec-
tion of the air chamber. The complete air cham-
ber assembly can now be lifted clear from the
appliance.
Locate and remove the 4-screws that secure the
vessel (see fig. 32). The expansion vessel can
now be removed. Replace in the reverse order.
Take extreme care when refitting the wiring to the
air chamber. Ensure all seals are in good condi-
tion, taking care to ensure they are replaced
correctly.
6.28.1 LATENT HEAT COLLECTOR fig. 33/34/35
Carry out component removal procedure as de-
scribed in 6.4.
Remove the flue hood and fan assembly as
detailed in 6.16. Disconnect and remove the inlet,
outlet and condense pipes from the collector.
Unscrew and remove the 3 screws that secure
the collector to the air chamber and disconnect
Fig. 32
B
A
the collector from the flue connection. Replace in
the reverse order ensuring all seals are intact and
located correctly.
6.28.2 DISMANTLING THE LATENT HEAT COLLEC-
TOR
Apart from routine servicing or maintenance of
the retarder and coil, the latent heat collector is a
non-serviceable component, therefore, there is
no requirement to disassemble the collector.
6.28.3 RETARDER fig. 35
Carry out component removal procedure as de-
scribed in 6.4.
Unclip and remove the air chamber cover, gently
pull the cover towards you before lifting and
disengaging. Remove the 3-screws that secure
the sealing plate and prise the plate and sealing
ring from the latent heat collector. The retarder
can now be removed allowing access to the heat
collector coil. Replace in the reverse order ensur-
ing all seals are intact and correctly located.
Fig. 33
Fig. 34
Fig. 35
