MC2: 10/03/12 Page 60 of 90
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288
Modulex MLX Series Gas Fired Boiler System
Operation and Maintenance Manual
9.4.1 Disassembly For Burner Section Replacement
Follow instructions, below, to replace the aluminum burner sections in an MLX boiler.
IMPORTANT NOTE!
Refer to Paragraph 9.2.2 and 9.2.3 for detailed disassembly instructions
per steps 1-3. The burner gaskets, condensate tray gasket, and flue
collector gasket must always be replaced with new gaskets during this
maintenance task.
Unit Disassembly for Burner Section Replacement
1. Remove the top cover, side covers, and fan assembly cover (Paragraph 9.3.1.).
2. Unbolt fan assembly (Figures 9-5), remove filters (Figure 9-6), affix burner manifold ends into
cleaning position (Figures 9-7, 9-8).
3. Lift up the Fan/Burner assembly and insert support rods. (Figure 9-9).
4. Remove burner modules and gaskets. (Paragraph 8.3.2, Figures 9-12 and 9-13).
5. Remove the Flow Header (upper) and Return Header (lower) assembly (Figure 9-17, below), and
keep all hardware and gaskets for re-assembly.
6. Remove the electrical connections (igniter cable, ground lead, and flame detector cable) from each
aluminum section (Figure 9-18).
7. Disassemble flue collector from the condensate tray by removing the three (3) M4 screws along the
top flange and three (3) M4 bolts from along the bottom flange of tray (Figure 9-14).
8. Remove the nut and washer from the end of each of the four threaded metal rods that hold the
aluminum sections together. Slide the rods out from the other end (Figure 9-19).
9. Using a screwdriver, or appropriate hardened tool, leverage the affected sections apart while cutting
the silicone seal between them.
Figure 9-17: Header Disassembly
Header
Header
(upper)
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