Glow-worm 30ci Plus - Manual (Page 46)

46 4000123944-2
20 Replacement of Parts
20.10 Burner injector assembly, refer to
diagram 20.5 and 20.6.
Before starting refer to the front of Section 20 Important
information.
• Remove the front panel, refer to Section 17.3.
• Lower the control panel, refer to Section 17.4.
• Remove the sealed chamber cover, refer to Section 17.5.
• Remove the combustion chamber cover, refer to Section17.7.
• Remove burner from boiler, refer to Section 17.9.
• Undo the gas supply union nut from under the sealed
chamber.
Note: The fibre washer between the burner injector assembly
and gas supply must be kept for use on reassembly.
• Undo and remove the sense and ignition electrode assemblies.
• Remove the burner injector assembly securing screws.
• Remove the burner injector assembly by lifting up, easing the
gas connection through the grommet in the sealing chamber.
Note: Take care not to damage the insulation.
• When refitting burner injector assembly ensure the gas
connection locates correctly through the grommet.
Note: Make sure that injector size, marked on each injector, is
the same as that given in ‘Section 1 Technical Data’ for the
type of gas being used.
20.11 Overheat thermostat
Before starting refer to the front of Section 20 Important
information.
• Remove the front panel, refer to Section 17.3.
• Remove the sealed chamber cover, refer to Section 17.5.
• Locate overheat thermostat on heating flow pipe on right
hand side of boiler, see part of diagram 20.7.
• Disconnect electrical connections from thermostat
• Remove the thermostat and bracket assembly from heating
flow pipe by unclipping at the side of the bracket. Remove the
thermostat, fit new thermostat and replace assembly.
• When refitting electrical connections to replacement
thermostat the polarity is not important.
20.12 Ignition electrode
Before starting refer to the front of Section 20 Important
information.
• Remove the front panel, refer to Section 17.3.
• Lower the control panel, refer to Section 17.4.
• Remove the sealed chamber cover, refer to Section 17.5.
• Remove the combustion chamber cover, refer to Section
17.7.
• Remove the burner, refer to Section 17.9.
• Remove the right hand side panel, refer to Section 17.6.
• Undo and remove screw securing electrode assembly to the
burner injector assembly, see diagram 20.6.
• Disconnect the electrical connections at the ignition unit, see
diagram 20.22. Note the routing of the cables.
20.13 Flame sense electrode
Before starting refer to the front of Section 20 Important
information.
• Remove the front panel, refer to Section 17.3.
• Lower the control panel, refer to Section 17.4.
• Remove the sealed chamber cover, refer to Section 17.5.
• Remove the combustion chamber cover, refer to Section
17.7.
• Remove burner, refer to Section 17.9.
• Remove the left hand side panel, refer to Section 17.6.
• Undo and remove screw securing sense assembly to the
burner injector assembly, see diagram 20.6.
• Disconnect the electrical connection from the inline connector,
Note the routing of the cable.
Diagram 20.7
9826
PIPE SECURING
CLIP 2 OFF
ELECTRICAL
LEADS
OVERHEAT
THERMOSTAT
HEAT
EXCHANGER
9825
Diagram 20.5
Diagram 20.6
BURNER INJECTOR
BAR
GAS SUPPLY
PIPE
GROMMET
IGNITION ELECTRODE
ASSEMBLY
SENSE ELECTRODE
ASSEMBLY
9813
9814
9819
9820
CLIP