9
MAINTENANCE
40
9.1
Warnings
The procedures detailed in this chapter
must
be carried out only by a professionally
qualified person.
Thus you are advised to
contact an Authorised 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 isolation
switch adjacent to the appliance and
turn off
the gas
cock, before carrying out any pro-
cedures, whatsoever, for cleaning, mainten-
ance, opening or dismantling boiler panels.
9.2
Dismantling the external
panels
Front panel
1 Loosen the three screws A (Fig. 9.1).
2 Lift and remove the panel.
A
Sampling points
Air--- Flue exhaust
Fig. 9.1
Side panels
3 Loosen the screws B. Bring the bottom of the
panels away from the boiler and lift them, free-
ing them from the top hooks (Fig. 9.2).
B
Fig. 9.2
9.3
Emptying the d.h.w. system
1 Turn off the d.c.w. inlet isolating valve (13 in
Fig. 9.3) and turn on the hot water taps and any
drain cocks.
14
13
16
12
Closed position
Fig. 9.3
9.4
Emptying the c.h. system
1 Close the c.h. isolating valves (12 and 16 in
Fig. 9.3).
2 Open the central heating drain cock (24 in
Fig. 9.4).
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.
M
A
IN
TE
NA
NCE