Rendamax R2000 Series, Техническая документация инструкция

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Electrodes
Remove the burner trolley as described earlier. Remove the insulation covered stainless steel channels
and each burner as described at burner bars. Remove the air guide assembly(s) which are located under
the burner bars and ensure the spark electrode is disconnected from the ignition generator. Remove
the burner assembly frame complete from its location in the burner trolley.
The ignition and sensing electrodes can now be replaced by removing two security screws and nuts
which attach each electrode to the burner assembly frame.
When re-assembling ensure that the electrodes are correctly replaced with the burner bars in position.
See that the insulation covered channels are correctly located. Replace components in the reverse order
of removal. Check operation of electrodes by carrying out the relevant parts of section 6, commissioning.
Burner bars
Remove the burner trolley as described earlier. Remove the insulation covered stainless steel channels.
With the exception of the pilot burner bar, the burner bars are removed by first lifting the end of the burner
out of its locating notch and then withdrawing the burner from its injector.
To remove the pilot burner assembly, disconnect the wiring to the sensing electrode and the ignition
electrode. Avoid damaging the electrodes. Replacement of the burner bars is described in section
Servicing. Ensure the burners are not damaged or warped.
Injectors
Remove the burner trolley and burner bars as described before. With the burner bars removed the
injectors can be unscrewed from the gas manifold.
Ensure that injectors are unblocked and are the correct size - 1.8 mm diameter (natural gas).
Use an approved pipe sealant on the injector thread to ensure a gas sound seal.
Replace components in the reverse order of removal.
Gas train
(including gas train components).
Release the fi xings securing the top of the gas train cover at the front of the boiler and remove
carefully in upward direction. Ensure that the gas service cock is closed, release the gas union, disconnect
the plugs from the front electrical panel and release the quick clamps at either side of the burner trolley
and withdraw the burner trolley.
Solenoid valve heads can be replaced with valve in situ by releasing the appropriate fixing on the
valve head. Ensure that the new valve head is wired in accordance with the separate supplied wiring
diagrams.
The main gas train is removed as follows:
Loosen the grub screw securing the keyed shaft of the modulating valve servomotor to its coupling
and remove the motor by unscrewing two fixing screws. It is not necessary to remove the gas train if
only replacing this component. Remove the pin connecting the modulating air damper to its actuating
arm at the modulating valve by releasing the clip.
Remove the copper pilot supply pipe by releasing the union nut at each end. Unscrew the four screws
that secure the modulating valve to its flange connection on the gas manifold being careful not to loose
the “O” ring, and withdraw the gas train to the left out from its locating slot in the burner trolley, the
various controls in the main gas train can now be replaced by unscrewing from the gas train.
The pilot solenoid valve can also be unscrewed at its outlet connection and replaced.
An approved thread sealant should be used when re-connecting any pipe threads. Ensure that any
controls replaced are fitted squarely on the gas train, the “O” ring seal on the outlet of the modulating
valve is in good condition and correctly located and the modulating valve drive shaft and linkages are
correctly assembled.
Upon replacement if components carry out the relevant portions of section 6 commissioning.
8.6 Component replacement
DOC2012/2000en
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