Cleaning The Combustion Chamber - Patterson-Kelley STORM ST-2500 Installation & Owner's Manual

5.2 Cleaning the Combustion Chamber

Patterson-Kelley recommends cleaning the combustion chamber once annually using the following
procedure:
1. Lockout/Tagout gas supply to the boiler.
2. Lockout/Tagout electrical power to the boiler.
3. Disconnect the condensate piping and install a temporary drain hose into the condensate
trap/drain. Run the open end of this hose to a nearby floor drain.
4. Make sure the surrounding area is free of obstacles.
5. Disconnect the wires to the sensors, switches, ignition electrode, and the ionization rod. Secure
the wires out of the way for the following steps.
6. Remove the front blower-to-burner transition casting.
a. Remove the (6) M8 nuts (13mm head) that secure the casting to the burner door.
b. Remove the (2) M8 bolts (13mm head) (on the front) and (2) M8 nuts (13mm head) (on
the back) that secure the casting to the blower plate. The transition casting will remain in
place, resting on the studs on the burner door.
c. Using the handle provided on the casting, remove the casting from the unit, and set to
the side. Note the position of the (1) gasket on the top of the casting and the (1) gasket
between the casting and the burner door. These gaskets should be replaced when re-
installing the casting.
Revised: June 26, 2020
Released: June 26, 2020
© Patterson-Kelley 2020
All Rights Reserved.
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Installation and Owners Manual Rev A.docx
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