Specific Maintenance Operations Changing Components; Spark Ignition & Flame Sensing Electrodes - Baxi EcoBlue Plus Combi 28 Installation And Service Manual

10 Maintenance
Control Box
removed for clarity
Flow
Restrictor
Filter
Cartridge
Turbine
& Filter
Clip
Inlet/Return Manifold
Fig. 48
Isolation Cock
Sealing
Gasket
Spark Ignition
Electrode
Electrode
Leads
Flame Sensing
Fig. 49
54 EcoBlue Plus Combi
View
underneath
appliance
DHW
Fig. 47
Sealing
Gasket
Electrode
Expansion Vessel Charge - 1.0 bar
13. To check the charge accurately ensure the system is cold.
It is also necessary to relieve the pressure by draining the
boiler. Using a suitable gauge check the pressure at the valve
on the underside of the vessel. Adjust the pressure as required
and repressurise the system.
A right angled valve extension will aid checking and
repressurising.
DHW Filter (Fig. 48)
14. If the flow of domestic hot water is diminished, it may be
necessary to clean the filter.
15. Turn the cold mains isolation cock (Fig. 47) off and draw off
from a hot tap.
16. Disconnect the pump cable, remove the retaining clip and
extract the filter cartridge and rinse thoroughly in clean water.
Reassemble and check the flow.
17. Check the operation of the Safety Pressure Relief Valve.
Simulate 'Flame Failure' fault by isolating the supply at gas cock
and operating the boiler.
18. Reassemble the appliance in reverse order, ensuring the
front case panel is securely fitted. Recommission the boiler.
19. Complete the relevant Service Interval Record section of the
Benchmark Commissioning Checklist at the rear of this
publication and then hand it back to the user.
10.3 Specific Maintenance Operations
Changing Components
WARNING
When changing components ensure that both the
gas and electrical supplies to the boiler are isolated
before any work is started. When the component has
been changed recommission the boiler as described
in Section 7.
Always examine any seals or gaskets, replacing
where necessary. The Case Front Panel MUST seal
effectively against the boiler side panels.
See Section 10.2 paragraph 2 for removal of case panel door
etc.
10.3.1 Spark Ignition & Flame Sensing Electrodes
1. Note their position and disconnect the electrode leads.
Remove the retaining screws securing each of the electrodes to
the combustion box cover and remove the electrodes, noting
their orientation.
2. Check the condition of the sealing gaskets and replace if
necessary. Reassemble in reverse order (Fig. 49).
3. If satisfactory combustion readings are not obtained ensure
the electrode position is correct and perform the combustion
check again.
133 should be displayed.
7219706 - 01 (04/15)