Patterson-Kelley P-K STORM ST-1250 Installation & Owner's Manual page 67

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.
1 of 2 M8
nuts
(back)
7. Remove (8) M14 Door Fixation Screws (12mm Allen) from the perimeter of burner door, that are
used to secure the door to the exchanger. Once all screws are removed, the door should be
free to slide out of the front of the cabinet.
Revised: October 2, 2019
Released: October 2, 2019
Blower-to-
Burner
Transition
Casting
1 of 6 M8
nuts
 Patterson-Kelley 2019
All Rights Reserved.
Technical Service 1.877.728.5351
1 of 2 M8
studs
(front)
1 of 8
M14 studs
2691000099 P-K Storm Installation and Owners
P-K Storm TM Gas Fired Boiler
Manual.docx
Page 58