Patterson-Kelley STORM ST-2500 Installation & Owner's Manual page 64

3. Check burner for signs of deterioration or corrosion. Replace burner immediately if any
deterioration, corrosion, or damage is found. If damage to the burner is suspect from improper
combustion settings, be sure to do a combustion check to the factory preferred settings.
The burner may be cleaned with water if any accumulated dust or lint is found. This must be
done with the burner outside of the combustion chamber.
4. Inspect combustion chamber when the burner door is open. Pay careful attention to the door O-
Ring, Braided Rope Gasket, and the door's insulation/refractory. If any of these show signs of
damage or deterioration; they will need replaced immediately. Note any signs of deterioration or
build-up of deposits on the coils of the heat exchanger. Clean as necessary following the
procedure in 5.2.
Drain and flush the water side of the heat exchanger as required (separate from system flush)
using clean water only. This heat exchanger comes with a drain valve; it is located on the back
of the heat exchanger above the exhaust vent. To flush water side of heat exchanger, it is
recommended to first isolate the boiler from the system. Remove pressure from the boiler
piping. It is then recommended to attach a hose or piping to the drain valve on the heat
exchanger. That hose (or piping) should be run to a floor drain. Open the drain valve to drain
water from the boiler piping. It is then recommended to remove the flow switch from the outlet
piping. Once the flow switch is removed, utilize the 1" NPT opening to attach a hose. The hose
should then be pressurized with clean water, with the drain valve to the boiler open and piped to
a floor drain. Flush the heat exchanger for several minutes. When complete, remove any hoses
or piping, and reinstall components to their operating positions.
DO NOT ALLOW THE DRAIN VALVE TO BE OPEN INSIDE THE CABINET WITHOUT
***Do this flush at low pressures— just enough pressure to push water through the
Revised: June 26, 2020
Released: June 26, 2020
18
RUNNING PIPE OR HOSE TO A DRAIN.
exchanger and out of the drain valve***.
© Patterson-Kelley 2020
All Rights Reserved.
TM
P-K Storm Gas Fired Boiler
Technical Service 1.877.728.5351
2691000273 P-K Storm ST2500-ST4000
Installation and Owners Manual Rev A.docx
Page 55