Cleaning The Burner Module And Combustion Chamber - Watts AERCO EXT Installation, Operation & Maintenance Manual

Modulex EXT Commercial Series
CHAPTER 8: Maintenance Schedule
NOTE
The check valve (1 in Fig. 7-
19) should be checked at this
time to ensure that it moves
freely and closes properly.
Figure 8-19 Lifting Burner Assembly and Location of the Check Valve

8.11 Cleaning The Burner Module and Combustion Chamber

After completing the previous section, the individual burner modules are exposed and available
to be cleaned. Follow the instructions to clean the burner modules.
1. Carefully lift each burner module from its position. Remove both the module and the
gasket. Discard the used gasket, as each one will be replaced at reassembly.
W A R N I N G !
The burner gaskets MUST be replaced at every cleaning.
2. Use only compressed air to clean the burners by blowing into the "flame" side of the
burner mesh, as shown in Figure 8-20.
Figure 8-20: Burner Module Profile Compressed Air Orientation (Step 2)
3. Visually inspect burner mesh and the spot welds at the L profile (where the mesh is
welded to the frame) for integrity. If welds are compromised or the burner mesh is
damaged, the entire burner module should be replaced.
4. Once all the burner modules are removed, wash the combustion chamber underneath
with water. Avoid getting the electrical harnesses and components wet.
5. During this operation, inspect to the condensate drain pipe to determine if it is free of
obstructions; wash water should drain freely from the condensate drain pipe.
6. Blow the combustion chamber with compressed air and attempt to remove any dirt
clogging the aluminum pins of the combustion chamber wall. If any buildup is found on the
heat exchanger, particularly on the lower heat exchanger pins, remove it with a stiff plastic
brush.
7. Once the washing of the aluminum sections is finished, make sure the condensate drain
and trap are free of obstructions. Clean them if necessary.
8. Inspect the flue exhaust section, including the exhaust piping.
OMM-0160_A • DRAFT
COMPRESSED AIR
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