Boiler Servicing
58
11 Boiler Servicing
11.8.2 Photocell
Remove photocell from mount. Check
and clean the photocell. Replace if
damaged. Refer to Figure 11-14.
Remove the two screws securing the
photocell mount and pull out the
photocell tube. Check the condition
and thoroughly clean the inside of the
tube. Refit tube to burner.
Ensure the photocell clamp is fitted
25mm from end as shown in Figure
11-15. Refit into photocell mount
11.8.3 Ignition Element
Remove and check the condition of the
ceramic heating element. Replace if
damaged.
To remove the element from the tube,
grasp the black grommet and pull out
of the tube. Do NOT pull on the
element power cable.
Unscrew and remove the single screw
securing the ignition element tube and
pull it out of the burner.
Check the condition and thoroughly
clean the inside of the tube. Replace
the tube in the burner and secure with
the screw.
Check that the ceramic element is
correctly fitted into the ceramic socket.
Replace the ignition element in the
tube, ensuring that the element is
correctly positioned inside the tube.
Refer to Figure 11-16.
11.8.4 Pellet Feed Tube
Unscrew the three fixing screws and
remove the feed pipe and gasket from
the top of the burner.
Check the condition of the gasket and
replace if necessary.
Check the condition of the feed tube
and thoroughly clean the inside.
Check that the burn back thermostat is
correctly mounted and fixed to the top
of the tube.
Replace on burner, ensuring gasket is
correctly fitted, and secure with the
three screws
11.9 Re-fitting Burner
Before re-fitting the burner, check the
condition of the burner door gasket.
Replace if necessary.
With the gasket correctly located, re-fit
the burner to the combustion chamber
door. Carefully insert the burner brazier
through the opening and locate the
holes in the burner flange onto the M8
studs (on either side of the burner).
Secure the burner to the door with the
two M8 nuts previously removed.
Re-connect the three plugs to their
corresponding sockets on the left side
of the burner. Ensure that each plug is
fully pushed home until the small catch
clicks into place. Refer to Figure 11-9.
Check the condition of the pellet
delivery hose and ensure it forms an air
tight seal each end.
Check for any damage to the hose and
replace if necessary.
A damaged pellet delivery hose can
allow a back draught through the boiler,
resulting in the pellet tube (burn back)
thermostat operating and shutting
down the burner.
11.10 Condensate Disposal
System
11.10.1 Condensate Trap
Disconnect the condensate disposal
system from the outlet at the back of
the boiler. Check that the boiler
condensate outlet is clear. Remove any
blockage or ash build-up.
Remove the condensate trap (supplied
with the boiler) from the condensate
disposal system. Dismantle and check
the condition of the trap.
Thoroughly clean out the trap to
remove any deposits and re-fit to
condensate disposal system.
Reconnect the disposal system to
boiler outlet.
11.10.2 Condensate Disposal Pipe
Check entire length of discharge pipe,
for any leaks or blockages. Clean or
replace as necessary.
Check any other traps in the condensate
disposal pipework. Dismantle and
thoroughly clean to remove any
deposits. Re-fit to condensate disposal
system pipework.
Check that any outlets to a gully or
hopper are not obstructed. Remove
any blockages.
11.10.3 Burner Settings
If a condensate pump is fitted to the
system, check:
• The condition of the holding tank.
Thoroughly clean to remove any
deposits.
• Operation of the overflow cut-out
float switch.
• The pump is operating correctly.
11.11 Burner Settings
With the electrical power to the hopper
and boiler Switched on, and the burner
ON/STANDBY switch set to STANDBY,
check that ALL burner settings in the
‘INSTAL’ (Installer) menu are as given in
Section 9.6.
Check the burner control settings
match those set on commissioning (i.e.
as recorded on the Commissioning
Report form), a copy of which was left
with the householder/user.
Refer to Section 9.7 for details of how
to access and check these settings.
Reset the SERVICE timer as follows:
• Go to the ‘CLEAN’ sub menu in the
installer (‘INSTAL’) menu
• Go to the ‘RESET SERVICE’ setting.
• Press button 3 to reset timer to zero.
Refer to Section 9.7.1.3 for further
details on settings.
Figure 11-16: Photocell clamp position
Figure 11-17: Ceramic ignition element
!
NOTE
The condensate trap(s) and
condensate outlet MUST be checked
on EVERY service and cleaned as
necessary. Failure to regularly check
and clean the condensate trap (or
traps) may result in damage to the
boiler and this will not be covered by
the product warranty.
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