Harsco Industrial SC-1500 Owner's Manual

Also see for P-K SONIC SC-3000: Installation & owner's manual Installation & owner's manual Installation & owner's manual

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Harsco Industrial SC-1500 Owner's Manual Manual pdf 26 page image

P-K SONIC TM Gas Fired BoilerTTTTechnical Service 1.877.728.5351echnical Service 1.877.728.5351echnical Service 1.877.728.5351echnical Service 1.877.728.53513.4.1 Venting for Multiple BoilersWhile the vent design parameters outlined in Section 3.3 Combustion Air and Section 3.4 Vent Terminationstill apply, achieving those same parameters in a combined vent system, adds a significant degree ofcomplexity. Therefore, venting systems for multiple boilers shall be designed by experienced andknowledgeable venting professionals. The venting system shall be designed to prevent backflow of exhaustgas through idle boilers. For combined breeching installations, please follow recommendations of a qualifiedventing engineer/manufacturer.RECOMMENDATION!Harsco Industrial, Patterson-Kelley recommends that common venting systems bedesigned for a maximum continuous exhaust pressure of -0.04” W.C. when measuredin the common vent. Locking inline dampers are recommended on the discharge ofeach boiler in order to maintain a slightly positive exhaust pressure within the boilerand upstream of the damper. The -0.04” W.C. in the common flue will help make surethe exhaust gases from an online boiler does not backflow through offline boiler(s). Inaddition, Harsco Industrial, Patterson-Kelley also recommends the use of motorizeddampers in the combustion air intake duct to help prevent the backflow of flue gasesfrom online boilers through offline boilers.3.4.2 Sealed Combustion/Direct Vent SystemsThese boilers are also certified for operation with a sealed combustion air and pressurized venting system.Such a system employs a sealed combustion air intake duct leading from outdoors and a sealed exhaust ventterminating outdoors. Air flow through the system is maintained by the combustion air fan. Allowableconfigurations of vent and air intake terminations are illustrated below.NOTEDrains have been omitted for clarity. The exhaust vent must be at least 3 feetabove the air intake. The air intake and exhaust vent must extend 6" to 12" from theexterior wall and be offset. The inlet air duct loss should not exceed 0.22” W.C.The combined pressure drop of the air supply duct and exhaust vent must not exceed 0.44” W.C. Thispressure drop includes both the inlet and exhaust duct friction loss. If the air inlet and the exhaust ventterminate on the same wall of the building they must utilize the same type of termination fitting. Allowabletermination fittings are either 90° elbows or tees. This boiler may be installed with sidewall vent using room air,see Section 3.3.1 Air Inlet Requirements.12” Minimum36”Minimum