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9
MAINTENANCE
9.1
Warnings
The procedures detailed in this chapter
must be carried out only by a Gas Safety
Registered Engineer.
Thus you are advised to contact an Author-
ised Service Agent.
For Ireland (IE), the servicing work must
be carried out by a competent Person.
For efficient and continuous operation of the
boiler you are advised to have, at least once
a year, maintenance and cleaning done by
an Approved Service Engineer.
Isolate the appliance from the electricity
supply by turning off the fused spur isola-
tion switch adjacent to the appliance and
turn off the gas cock, before carrying out
any procedures, whatsoever, for cleaning,
maintenance, opening or dismantling boiler
panels.
9.2
Dismantling the external
panels
Front panel
• Loosen the three screws A (Fig. 9.1).
• Lift and remove the panel.
Air
Sampling point
Fig. 9.1
Side panels
• Loosen the screws B. Bring the bottom
of the panels away from the boiler and
lift them, freeing them from the top hooks
(Fig. 9.2).
MAINTENANCE
Flue exhaust
Sampling point
A
B
Fig. 9.2
9.3
Emptying the d.h.w. system
• Turn off the d.c.w .inlet isolating valve and
turn on the hot water taps and any drain
cocks.
9.4
Emptying the c.h. system
• Close the c.h. isolating valves.
• Open the central heating drain cock (25
in Fig. 9.3).
Fig. 9.3
• A small quantity of water will remain in
the d.h.w. heat exchanger after draining.
If the boiler is being drained to prevent
freezing, the d.h.w. heat exchanger must
be removed and inverted to drain fully or
an antifreeze solution added.
25
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