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For assistance or additional information, consult a qualified installer, service agency or the gas supplier. This boiler requires a special venting system. Read these instructions carefully before installing. CR®WN Boiler Co. Manufacturer ofHydronic He ating Products P.O. Box 14818 3633 I. Street Philadelphia, PA 19134 Tel: (215) 535-8900 • Fax: (215) 535-9736 • IMPORTANT INFORMATION - READ CAREFULLY All boilers must be installed in accordance with National, State and Local Plumbing, Heating and Electrical Codes and the regulations of the serving utilities. These Codes and Regulations may differ from this instruction manual. Authorities having jurisdiction should be consulted before installations are made. In all cases, reference should be made to the following Standards: A. Current Edition of American National Standard ANSI/NFPA 31, “Installation of Oil Burning Equipment”, for recommended installation practices. B. Current Edition of National Fuel Gas Code, NFPA 54/ANSI Z223.1. C. Current Edition of American National Standard ANSI/NFPA 211, “Chimneys, Fireplaces, Vents, and Solid Fuel Burning Appliances”, For Venting requirements. D. Current Edition of American Society of Mechanical Engineers ASME CSD-1, "Controls and Safety Devices for Automatically Fired Boilers", for assembly and operations of controls and safety devices. E. All wiring on boilers shall be made in accordance with the National Electrical Code and/or Local Regulations. DANGER Indicates an imminently hazardous situation which, if not avoided, will result in death, serious injury or substantial property damage. CAUTION Indicates a potentially hazardous situation which, if not avoided, may result in moderate or minor injury or property damage. WARNING NOTICE Indicates a potentially hazardous situation which, if not avoided, could result in death, serious injury or substantial property damage. Indicates special instructions on installation, operation, or maintenance which are important but not related to personal injury hazards. DANGER DO NOT store or use gasoline or other flammable vapors or liquids in the vicinity of this or any other appliance. WARNING Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Failure to follow all instructions in the proper order can cause personal injury or death. Read and understand all instructions, including all those contained in component manufacturers manuals which are provided with the appliance before installing, starting-up, operating, maintaining or servicing this appliance. Keep this manual and literature in legible condition and posted near appliance for reference by owner and service technician. This boiler requires regular maintenance and service to operate safely. Follow the instructions contained in this manual. Installation, maintenance, and service must be performed only by an experienced, skilled and knowledgeable installer or service agency. All heating systems should be designed by competent contractors and only persons knowledgeable in the layout and installation of hydronic heating systems should attempt installation of any boiler. It is the responsibility of the installing contractor to see that all controls are correctly installed and are operating properly when the installation is completed. Installation is not complete unless a pressure relief valve is installed into the specified tapping located at the rear of appliance - See Section III of this manual for details. This boiler is suitable for installation on combustible flooring. Do not install boiler on carpeting. Do not operate on floors where heat affected material is below. Do not tamper with or alter the boiler or controls. Retain your contractor or a competent serviceman to assure that the unit is properly adjusted and maintained. Clean boiler at least once a year - preferably at the start of the heating season to remove soot and scale. The inside of combustion chamber should also be cleaned and inspected at the same time. Have Burner and Controls checked at least once a year or as may be necessitated. Do not operate unit with jumpered or absent controls or safety devices. Do not operate unit if any control, switch, component, or device has been subject to water. Return water cannot be lower than 135°F for prolonged periods of time. Operation under these conditions will result in sustained condensing within the combustion chamber and potentially reduce boiler longevity. In addition, the return water cannot be introduced into the boiler if it is more than 40°F less than the idle boiler temperature. Continued operation under these conditions may result in premature boiler failure through thermal shock. Example: A boiler that has been idle for some time since the last heat demand cycle may have it's boiler water temperature reduced to 150°F. The return temperature from the next zone activation cannot b...

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