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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
5. Take a sample of the system fluid and verify the water quality complies with the standard
Appendix C – Water Quality Standards Quality Standards for Hydronic Boilers
defined in
in Multi-Metal
Systems.
6. Inspect and clean the condensate system and check for leaks. If a condensate neutralization kit
is present, open the lid and inspect the media. If they are absent or have been significantly
worn away, replace them with new media.
7. Examine the venting system. Refer to the vent manufacturer's instructions for requirements in
addition to those listed below.
Revised: December 8, 2021
Released: December 8, 2021
RUNNING PIPE OR HOSE TO A DRAIN.
exchanger and out of the drain valve***.
Patterson-Kelley 2021
All Rights Reserved.
TM
P-K Storm
Gas Fired Boiler
Technical Service 1.877.728.5351
2691000273 P-K Storm ST2500-ST6000
Installation and Owners Manual Rev C.docx
Page 66
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