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Piping with Refrigeration Systems
When installed in a two-pipe system that provides both chilled and hot water, the control system should
be configured so as to limit the time rate of change of temperature at the boiler. Consult your
authorized Patterson-Kelley boiler representative for application guidance.
Piping with air handling units
The boiler piping system of a hot water heating boiler connected to heating coils located in air handling
units, where they may be exposed to refrigerated air circulation, must be equipped with flow control
valves or other automatic means to prevent gravity circulation of the boiler water during the cooling
cycle.
3.8 Water Quality
The P-K Storm
®
boiler's heat exchanger is made of a stainless steel alloy. The heat exchanger
requires proper water conditions to remain efficient and function properly. Information of proper water
treatment can be found on our website
information, please refer to Patterson-Kelley Multi-Metal Systems Water Quality Standards as it
appears in
Appendix C – Water Quality Standards Quality Standards for Hydronic Boilers in
Multi-Metal Systems
as this applies to the warranty of your heat exchanger. Under no circumstances
should Soften Water be used in boiler.
NOTICE! The chemical manufacturer for use must certify glycol or other treatment chemicals
added to the system in multi-metal systems that include a stainless steel heat exchanger.
Under no circumstances should petroleum based cleaning or sealing compounds be used in the
boiler system.
Under no circumstances should the hydronic system be flushed while the appliance is attached to
the system since the debris or corrosion products may accumulate in the appliance and obstruct the
appliance's heat exchanger.
If the piping system attached to this unit will be chemically cleaned, the boiler must be disconnected
from the system and a bypass installed so that the chemical cleaning solution does not circulate
through the boiler. Following chemical cleaning, the system should be thoroughly rinsed to remove
cleaning agents prior to reconnecting the boiler to the system.
Revised: February 2, 2024
Released: February 2, 2024
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All Rights Reserved.
®
P-K Storm
Gas Fired Boiler
Technical Service 1.877.728.5351
type in search: "water quality". For
2691000403 P-K Storm ST2500-ST8000
Installation and Owners Manual Rev G.docx
Page 53
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