Cleaning The Burner Module; Cleaning The Heat Exchanger - Watts AERCO Modulex EXT Commercial Series User Manual

Modulex EXT Commercial Series Boilers User Manual
CHAPTER 8: Maintenance Schedule
Disassembling the Boiler for Maintenance – Continued
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

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.
WARNING!
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. Inspect the flue exhaust section, including the exhaust piping.

8.12 CLEANING THE HEAT EXCHANGER

Over time, hard combustion by-product deposits can form on the combustion chambers' heat
exchanger elements. Routine annual maintenance may be sufficient to keep these elements
clean. However, if the by-product build-up is too great, the efficiency of the heat exchanger will
degrade and the unit's overall efficiency will decline.
OMM-0095_0H
GF-139
Cleaning the Burner Modules
COMPRESSED AIR
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
Page 131 of 144
09/15/2017