Raypak P-4001 Outer jacket very hot paint blistered, Takes long time to heat pool or spa Liming

Contents INSTALLATION & OPERATING INSTRUCTIONS Raytherm Commercial Swimming Pool HeaterModels P-926to P-1826 & P-2100to P-4001 Corrosive water voids all warranties CONTENTS WARNINGS Pay Attention to These TermsDANGER GENERAL SPECIFICATIONS RECEIVING EQUIPMENT INSTALLATIONBase Installation Code RequirementsCombustion Air Indoor Units Only ClearancesIndoor Heaters Outdoor HeatersVenting Connections Drafthood Indoor ModelsVent Piping Gas Pressure Regulator Gas Supply ConnectionsModel Venting of Diaphragm Gas Components1-1/4” 1-1/2”Flow Switch CONTROLSWater Connections Automatic Chlorinators and Chemical Feeders Water Pressure SwitchUnitherm Governor Operation Companion Flange Connections ModelsConnection Model NoMinimum Model No. Loop* Flow Rates Heater Flow2.Lace metal strapping or clamps, NOT PROVID- ED through the ¾” slots on the cover and fasten securely to pipe as shown in Fig. 15 & 16. Do not over-tightenclamps HEATER Models 0926 thru 1223 with UG ISOLATION VALVESFORSERVICE RECOMMENDED FIELD INSTALLEDBLENDEDWATER TEMPERATURE THERMOMETERATHEATERINLETHEATEROUTLETTEMPERATURETHERMOMETER Models 2100 thruAuxiliary Bypass Valve Adjustment External Auxiliary Bypass Valve Where Required926-1223Models Only Temperature ControlsHigh & Low Gas Pressure Switches Electrical WiringLow Water Cutoff Electronic IgnitionWiring Diagram-Models Wiring Diagram-Models Wiring Diagram-Models Wiring Diagram-Models Pressure Switch Adjustment Pressure SwitchSERVICING General Location Of ControlsPilot Safety START-UP PROCEDURESTwo-SpeedPumps Before Start-UpINSPECTION PROCEDURES After Start-UpBurners Tube Cleaning Procedure Typical SERVICING PROCEDURESBurner Drawer Removal Gas Valve RemovalHeat Exchanger Reassembly Pilot Removal and CleaningMain Burner and Orifice Removal Heat Exchanger RemovalTube Replacement Procedure Control Well ReplacementProcedure For Cleaning Flue Gas Passageways Combustion Chamber RemovalUnitherm Governor Replacement MAINTENANCE AND CAREUNITHERM GOVERNOR WITH POWER ELEMENT INLET/OUTLET HEADER OUTLET INLET GASKETWinterizing Your Heater TROUBLESHOOTING MECHANICAL FOR QUALIFIED SERVICE PERSONNEL ONLYIMPORTANT NOTICE Reset time clock or refer to heater sizing chartClean filter Refer to installation instructionsIntermittent Pilot System TROUBLESHOOTING HONEYWELL S8600ELECTRICAL ELECTRONIC IGNITION IID IID STARTHEAT EXCHANGER WARRANTY LIMITED WARRANTY RAYTHERM TYPE P SIZESADDITIONAL WARRANTY EXCLUSIONS PARTS REPLACEMENT