29
Concord CXi - Installation
40
MAIN BURNER
1. Remove the burner tray from the boiler, as described in
Frames 36-37.
2. Each burner can be removed by lifting it at the back and
pushing it backward to clear the injector. Disconnect the
spark electrode assembly and heat shield from the RH
burner (or the flame detector electrode from the LH
burner), as necessary.
3. Reassemble in reverse order.
1. Undo and pull off all the plugs from the gas valve
solenoids.
2. Turn off the gas at the gas inlet cock. Undo the 2 unions
at either side of the gas valve assembly and remove the
assembly (complete) to a suitable working area.
3. In order to be able to remove the faulty gas valve it will be
necessary to slacken or remove all the screws on either
the inlet or the outlet manifold and only those 4 screws
securing the faulty gas valve on the other manifold. The
faulty gas valve can then be removed and replaced.
Ensure that the arrow on the gas valve points in the
direction of flow.
4. Ensure that new ‘O’ ring seals are fitted and that the 'O'
ring seals on the remaining gas valves are correctly in
place. Ensure that all screws are retightened.
5. Test for gas soundness.
6. Recommission the appliance and set the manifold
pressure, as described in Frames 23-25.
39
GAS CONTROL VALVE
SERVICING
SERVICING
41
BURNER AND CONTROLS ASSEMBLY - Exploded View - CXi 110-160
9. Main burner.
10. Main burner RH.
11. Ignition electrodes.
12. Detection electrode assembly.
PTP Pressure test point.
LEGEND
1. Main gas inlet cock.
2. Gas inlet union.
3. 'O' ring seal.
4. Gas control valve
5. Gas control valve.
6. Spark generator.
7. Burner manifold.
8. Main injector.
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