Component Replacement - Page 31
6.1
Central Heating Overheat Thermostat
Fig. 27
a.
Remove the white front case and three air box covers.
See 5.1 & 5.3 in ‘Routine Maintenance’.
b.
The thermostat is located on the outlet tail on the right
hand side of the heat exchanger. Disconnect the two
electrical leads.
c.
Undo the two long fixing nuts and remove the thermostat
from the heat exchanger.
d.
Fit the new overheat thermostat taking care not to touch
the exposed disc on the thermostat face.
Do Not use
heat sink compound
. Re-assemble in reverse order.
6.2
Domestic Hot Water Limit & Frost
Thermostats
a.
Remove the white front case and base panel.
See 5.1 & 5.2 in ‘Routine Maintenance’.
Lower the control panel, (one screw).
b.
Disconnect the electrical leads from the thermostat.
c.
Remove the two securing screws and pull the
thermostat clear of the pipe.
d.
Fit the new thermostat and re-assemble in reverse
order.
6.3
Sensor and Ignition Electrode
(Electronic versions only)
a.
Remove the white front case, base panel, air box covers
and combustion chamber front panel. See 5.1 to 5.3 &
5.6 in ‘Routine Maintenance’.
b.
Disconnect the lead from the base of the electrode to be
changed.
Remove the electrode retaining screw and remove the
electrode from the burner.
c.
Fit new electrode and re-assemble in reverse order,
checking the gap measures 4mm ± 0.5mm (Fig. 24).
6.4
Sensor and Ignition Leads
(Electronic versions only)
a.
Remove the white front case, base panel and main air
box cover. See 5.1 to 5.3 in ‘Routine Maintenance’.
b.
Lower control panel (one screw)
c.
Note run of lead.
Remove lead ends from electrode and Full Sequence
Control Board. Pass lead through the silicone grommet.
d.
Fit new lead in correct position.
e.
Re-assemble in reverse order. Ensure the silicone
grommet is correctly fitted and not damaged. Replace if
necessary.
6.5
Spark Ignition Lead
(Permanent Pilot versions only)
a.
Remove the white front case, base panel and main air
box cover. See 5.1 to 5.3 in ‘Routine Maintenance’.
b.
Lower control panel (one screw)
c.
Note run of lead.
Remove lead ends from electrode and ignitor button.
Pass lead through the silicone grommet.
d.
Fit new lead in correct position.
e.
Re-assemble in reverse order. Ensure the silicone
grommet is correctly fitted and not damaged. Replace if
necessary.
6.6
Thermocouple
(Permanent Pilot versions only)
a.
Remove the white front case, base panel and main air
box cover. See 5.1 to 5.3 in ‘Routine Maintenance’.
b.
Lower control panel (one screw)
c. Loosen the nuts at both ends of the thermocouple and
partly withdraw each connection.
d.
Cut through the defective thermocouple where it passes
through the silicone grommet and remove both halves
from the boiler.
e.
Fit a new thermocouple retaining nut to the pilot.
f.
Carefully feed the new thermocouple through the
silicone grommet and push fully into the retaining nut
until it hits its stop. Tighten thermocouple nut.
g.
Position thermocouple along route, avoid sharp bends
which may kink copper sleeve. Connect to gas valve.
h.
Re-assemble in reverse order. Ensure the silicone
grommet is correctly fitted and not damaged. Replace if
necessary.
Summary of Contents for 80e
Page 5: ...Optional Extras Page 5 ...
Page 6: ...Optional Extras Page 6 Installation instructions included as necessary with each kit ...
Page 7: ...Optional Extras Page 7 Installation instructions included as necessary with each kit ...
Page 12: ......
Page 28: ...Routine Maintenance Page 27 ...
Page 30: ...Routine Maintenance Page 29 ...
Page 34: ...Component Replacement Page 33 ...
Page 35: ...Component Replacement Page 34 ...
Page 43: ...7 1 Control Flow Sequence Permanent Pilot Page 42 ...
Page 44: ...7 2 Functional Flow Permanent Pilot Page 43 ...
Page 45: ...7 3 Fault Finding Permanent Pilot Page 44 ...
Page 46: ...7 4 Electrical Diagram Permanent Pilot Page 45 ...
Page 47: ...8 1 Control Flow Sequence Electronic Page 46 ...
Page 48: ...8 2 Functional Flow Electronic Page 47 ...
Page 49: ...8 3 Fault Finding Electronic Page 48 ...
Page 50: ...8 4 Electrical Diagram Electronic Page 49 ...