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11 Boiler Servicing
To ensure efficient operation of the
boiler it is recommended that it is
checked and serviced as necessary
at regular intervals. The frequency of
servicing will depend upon the particular
installation conditions and usage, but
in general once per year should be
adequate.
Servicing and replacement of parts
must only be carried out by a suitably
qualified engineer.
11.1 Checking Before
Servicing
The following sequential checks should
be made before any servicing:
1. Check the flue terminal and ensure
it is not blocked or damaged.
2. Run the boiler and check the
operation of its controls.
3. Ensure that all water/fuel system
connections and fittings are sound.
Remake any joints and check the
tightness of any fittings that may be
leaking.
4. If the boiler is used on a sealed
central heating system, check
the system pressure, check the
operation of the pressure relief
valve and check the expansion
vessel air charge. See Section 7.2.
5. Refill, vent and re-pressurise the
system as necessary. See Section
7.3.
6. Check that the louvres in the front
panel are clear.
7. Remove any sludge/water from the
fuel tank by opening the sludge
valve at the lower end of the tank.
8. With the fuel supply valve closed,
clean/replace the filter element and
clean the filter bowl.
9. Braided flexible fuel supply hoses
(as supplied with the boiler) should
be replaced annually. If long-life
hoses have been installed, these
should be inspected annually.
If in doubt replace the hoses. In
any event, these hoses must be
replaced every five years.
Allow the boiler to cool.
The data label on the inside of the case
side panel will indicate the fuel used and
the nozzle fitted.
11.2 Dismantling Prior to
Servicing
The procedure for dismantling the boiler
is as follows:
1. Remove the front panel by turning
the handle and withdrawing it
forwards at the bottom.
2. Remove the four screws securing
the top panel and carefully lift it
off, taking care not to damage the
insulation.
2. If a sealed system kit is fitted,
carefully lift up and remove the
expansion vessel from the front of
the boiler. Place the vessel on the
floor taking care not to strain the
flexible hose.
3. Remove the burner fixing nut (top
of mounting flange) and withdraw
the burner.
If required, disconnect the flexible
oil hose(s), use a suitable container
!
CAUTION
Details of every service should be
entered in the Service Log, in the
Boiler Handbook.
This information may be required
to validate the Grant extended
guarantee.
!
WARNING
Before starting any work on the
boiler, or fuel supply please read
the health and safety information
given in Section 14.
External equipment operated at
230 Volts should not be serviced
or repaired under adverse weather
conditions.
!
NOTE
A test switch is fitted to the control
panel to allow the boiler to be
testfired. When On, the switch
by-passes the external control
system.
!
WARNING
Before servicing, set the boiler
On/Off switch to Off, isolate the
electricity supply and close the fuel
supply valve.
!
NOTE
The top panel has been designed to
provide a slight fall away from the
side positioned against a wall, the
side of the top panel with the fixing
screws closer to the bottom edge is
the highest side and goes against
the wall.
!
NOTE
If two flexible hoses are connected
to the burner, identify (mark if
necessary) which is the inlet
and return if they are to be
disconnected.
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