kn series gas boiler installation & operating ... - Agencespl.com

KN INSTALLATION AND OPERATION INSTRUCTIONSPage 13g) Any improper operation of the common ventingsystem should be corrected so the installationconforms with the National Fuel Gas Code, ANSIZ223.1/NFPA 54. When resizing any portion of thecommon venting system, the common ventingsystem should be resized to approach the minimumsize as determined using the appropriate tables inAppendix F in the National Fuel Gas Code, ANSIZ223.1/ NFPA 54 and or CSA B149 InstallationCodes.Figure 8 - Relief Valve PipingTout mauvais fonctionnement du systéme d'évacutioncommun devrait étré corrigé de façor que l'installationsoit conforme au National Fuel Gas Code,ANSI Z223.1/NFPA 54 et (ou) aux codes d'installationCSA-B149. Si la grosseur d'une section du systèmed' évacuation doit étré modifiée, le système devraitétré modifié pour respecter les valeurs minimales destableaux pertinents de l'appendice F du National FuelGas Code, ANSI Z223.1/NFPA 54 et (ou) des codesd'installation CSA-B149.GENERAL PIPING REQUIREMENTSCAUTION: Improper piping of this boiler will void themanufacturer’s warranty and can cause boiler failureresulting in flooding and extensive property damage!NOTE: Shut off valves and unions should beinstalled at the inlet and outlet connections of theboiler to provide for isolation of the unit shouldservicing be necessary.Relief ValvePipe the discharge of the pressure relief valve as shownin Figure 8.WARNING: Never install any type of valvebetween the boiler and the relief valve or anexplosion causing extensive property damage,severe personal injury or death may occur!Flow SwitchThe flow switch supplied with the boiler is wired toprevent the boiler from firing unless there's adequatewater flow through the unit.NOTE: Failure to maintain a minimum flow rate of 30gpm, 1.9 L/s at the boiler outlet will prevent the flowswitch from closing. If a minimum flow rate of 30 gpm,1.9 L/s cannot be maintained at the boiler outlet theflow switch will have to be relocated in the system.HEATING SYSTEM PIPINGGeneral Piping RequirementsAll heating system piping must be installed by a qualifiedtechnician in accordance with the latest revision of theANSI/ASME Boiler and Pressure Vessel Code, SectionIV.Where required, the piping must comply with ANSI/ASME CSD-1, Standard for Controls and Safety Devicesfor Automatically Fired Boilers.All applicable local codes and ordinances must also befollowed. A minimum clearance of 1in, 25 mm must bemaintained between heating system pipes and allcombustible construction. All heating system piping mustbe supported by suitable hangers not the boiler. Thethermal expansion of the system must be consideredwhen supporting the system. A minimum systempressure of 12 psig, 84 kPa must be maintained at thehighest point in the system piping.