AERCO Modulex EXT 321 - 1123 - Manual (Page 136)

MODULEX EXT 321, 481, 641, 802, 962, 1123 BOILERS
Installation, Operation & Maintenance Manual
7.12 Reassembly of the Burner Modules
Follow the instructions to reassemble the burner modules:
Reassembling the Burner Modules
1. After the cleaning of the boiler combustion chamber and/or the burners, reposition the
burners in their proper positions.
2. Position the new graphite gaskets onto each burner module and ensure proper positioning.
Proceed with reassembly, performing whichever disassembly operation was chosen (all or
WARNING!
The burner gaskets MUST be replaced at every cleaning.
3. individual method) in reverse order. For individual burner module reassembly (only) skip
steps a-d proceed directly to step e.
a) Lower burner assembly
b) Remove left and right lift pins at front and lift screws at rear.
c) Reinstall gas supply pipe to gas collector flange (4 bolts).
d) Reinstall gas collector tube ends onto boiler frame (2 screws per end).
e) Reinstall bolts “A,” “B” and “C” screws to secure burner assembly to boiler body.
NOTE
Tighten the burner bolts with a torque of 13 Nm.
f) Reassemble red hoses to the air intake manifold, place manifold onto the blowers,
then reattach tension spring clip to left and right ends of manifold.
g) Proceed to section 7.13 for final procedures before returning boiler to service.
7.13 Final Procedures After Maintenance
Before returning the boiler to service, the following procedures must be performed:
Final Procedures after Maintenance
1. Before lighting the boiler make sure the condensate drain pipe has been filled with water
(Figure 7-1).
2. Ensure the seal between the gas supply pipe and the gas collection tube flange are tight.
To do this, open the external gas valve and bubble check for leaks using a soap
solution.
3. When a single burner is ignited, check immediately to ensure that the gas valve and the
relevant premixing chamber are operating correctly.
4. Perform the combustion gas analysis and check all parameters (section 3.33).
5. Make sure that all the pressure test nipples, previously opened, have been closed.
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