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Condensate Drain
The condensate is acidic (pH between 3.0 and 5.0) and may be corrosive to some building drain systems.
A condensate neutralization system may be required and is available from Harsco Industrial, Patterson-
Kelley. If the condensate drainage system is exposed to freezing temperatures, it must be field heat
traced. The boiler could generate up to one gallon of condensate per 100,000 BTU input. As an
example, an SC-4000 boiler at full fire can produce 40 gallons per hour of
condensate must comply with all state and local codes.
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 Harsco Industrial, 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 SONIC
boiler's heat exchanger is made of two different stainless steel alloys. The heat
exchanger requires proper water conditions to remain efficient and function properly. Information of
proper water treatment can be found on our website
For information, please refer to Harsco Industrial, Patterson-Kelley Multi-Metal Systems Water Quality
Standards as it appears in
Boilers in Multi-Metal Systems
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 copper 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: June 2, 2017
Released: June 2, 2017
Appendix C – Water Quality Standards Quality Standards for Hydronic
as this applies to the warranty of your heat exchanger. Under no
HARSCO Industrial, Patterson-Kelley 2017
All Rights Reserved.
Technical Service 1.877.728.5351
condensate. Disposal of
type in search: "water quality".
www.harscopk.com
1004905978 P-K SONIC NURO Installation and
Owners Manual (Rev F Jun-2017).docx
®
P-K SONIC
Gas Fired Boiler
Page 38
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