TABLE OF CONTENTSSECTION 1.General Information1.1 Introduction ................................................... 11.2 Consumer Information and Satefy .................. 11.3 Warranty ....................................................... 21.4 Codes and Standards .................................... 21.5 Technical Assistance .................................... 21.6 Materials Installer Must Provide ..................... 31.7 Specifications ................................................ 3SECTION 2.Installation Instructions2.1 Introduction ................................................... 42.2 Field Assembly ............................................. 42.3 Location Requirements .................................. 5SECTION 3.Venting3.1 Combustion Air Supply .................................. 83.2 Vent Pipe Sizing and General Installation ...... 9SECTION 4.Gas Connections4.1 Gas Supply and Piping .............................. 104.2 Manifold Pressure ...................................... 114.3 Special Precautions for LP Gas ................. 12SECTION 5.Water Connections5.1 Water Piping .............................................. 125.2 Check Valve Installation ............................. 135.3 Automatic Flow Control Valve .................... 135.4 Reversible Water Connections ................... 135.5 Connections at Heater ............................... 155.6 Pressure Relief Valve ................................. 155.7 Auxiliary Components, Chlorinators, OzoneGenerators, and Sanitizing Checmicals ..... 16SECTION 6.Electrical6.1 Main Power ................................................ 176.2 Bonding ..................................................... 176.3 Auxiliary Time Clock Wiring ....................... 176.4 Remote Operation ...................................... 19SECTION 7.Operating Instructions7.1 Normal Operations ..................................... 197.2 Start-Up ..................................................... 197.3 Lighting and Shutdown Procedures ............ 217.4 Turning the Heater On/Off and Setting thetemperature control .................................... 217.5 Water Pressure Switch Adjustment ........... 237.6 Temperature Rise ....................................... 237.7 Adjusting the Manual Bypass Valve ........... 24SECTION 8.Maintenance8.1 Water Chemistry ........................................ 248.2 Seasonal Care ........................................... 258.3 Inspection and Service ............................... 26SECTION 9.Troubleshooting9.1 General Heater Troubleshooting ................. 289.2 Troubleshooting Guide ............................... 28SECTION 10.Professional Maintenance Service andDiagnostic Troubleshooting10.1 General Information .................................... 2910.2 Natural-Draft Combustion System .............. 2910.3 Heater Components and Their Operation .... 2910.4 Electrical Troubleshooting .......................... 30SECTION 11.Replacment Parts11.1 Ordering Information ................................... 3411.2 Parts List ................................................... 3611.3 General Exploded View .............................. 3711.4 Detailed Exploded View ............................. 38