TABLE OF CONTENTSSECTION 1.General Information1.1 Introduction .......................................................... 11.2 Consumer Information and Safety ...................... 11.2.1 Spa/Hot Tub Safety Rules .................................... 11.2.2 Swimming Pool Energy Saving Tips ................... 21.3 Warranty ............................................................... 21.4 Codes and Standards ......................................... 21.5 Technical Assistance ........................................... 21.6 Materials Installer Must Provide ........................... 31.6.1 Materials For All Installations ............................... 31.6.2 Materials For Special Installations ...................... 31.7 Specifications ....................................................... 31.7.1 General Specifications ........................................ 31.7.2 Dimensions ......................................................... 4SECTION 2.Installation Instructions2.1 Introduction .......................................................... 42.2 Field Assembly .................................................... 42.3 Location Requirements ....................................... 42.3.1 Introduction .......................................................... 42.3.2 Clearances .......................................................... 52.3.3 Flooring ................................................................ 62.3.4 Outdoor Installation .............................................. 62.3.5 Indoor and Outdoor Shelter Installation .............. 7SECTION 3.Venting3.1 Combustion Air Supply ........................................ 73.2 Vent Pipe Sizing and General Installation ........... 93.2.1 Outdoor Installations ........................................... 93.2.2 Indoor and Outdoor Shelter Installations ............ 93.2.3 Inspection and Replacement of Existing VentSystem with New Components ......................... 10SECTION 4.Gas Connections4.1 Gas Supply and Piping ...................................... 104.2 Manifold Pressure .............................................. 114.3 Special Precautions for Propane 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 ........................................ 165.7 Auxiliary Components, Chlorinators, OzoneGenerators and Sanitizing Chemicals .............. 16SECTION 6.Electrical Connection6.1 Main Power ....................................................... 176.2 Bonding ............................................................ 176.3 Auxiliary Time Clock Wiring .............................. 17SECTION 7.Operating Instructions7.1 Normal Operation ............................................. 177.2 Start -Up ............................................................ 197.3 Lighting and Shutdown Procedures ................ 207.4 Turning the Heater On/Off and Setting theTemperature Control ........................................ 207.5 Water Pressure Switch Adjustment ................. 227.6 Temperature Rise ............................................ 227.7 Adjusting the Manual Bypass Valve ................. 23SECTION 8.Maintenance8.1 Water Chemistry ............................................... 238.2 Seasonal Care ................................................. 248.2.1 Spring and Autumn Operation ......................... 248.2.2 Winterizing ........................................................ 258.2.3 Spring Start-up ................................................. 258.3 Inspections and Service ................................... 258.3.1 Owner Inspection ............................................. 258.3.2 Professional Inspection ................................... 26SECTION 9.Trouble Shooting9.1 General Heater Trouble Shooting .................... 279.2 Trouble Shooting Guide ................................... 27SECTION 10.Professional Maintenance, Service andDiagnostic Trouble Shooting10.1 General Information ......................................... 2810.2 Natural Draft Combustion System ................... 2810.3 Heater Components And TheirOperation .......................................................... 2810.4 Electrical Trouble Shooting .............................. 2910.4.1 Gas Valve .......................................................... 3010.4.2 Pilot Generator ................................................. 3010.4.3 Fusible Link ...................................................... 3010.4.4 Fireman switch and External Interlocks ........... 3110.4.5 Limit Switches .................................................. 3110.4.6 Water Pressure Switch ..................................... 3210.4.7 Temperature Control Circuit ............................ 3210.4.7.1 ON/OFF Toggle Switch ..................................... 3210.4.7.2 Variable Temperature Control ......................... 3210.4.7.3 Temperature Sensor ........................................ 3210.4.7.4 Temperature Control Circuit Board .................. 32SECTION 11.Replacement Parts11.1 Ordering Information ........................................ 3411.2 Parts List .......................................................... 3411.3 General Exploded View .................................... 3611.4 Detailed Exploded View ................................... 37Warranty .............................................. 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