A.O. Smith 315456-002, GAHH-40, GAHH-50 installation instructions

Contents

Main RESIDENTIAL GAS WATER HEATERS For Your Safety Installation Instructions and Use & Care Guide HIGH EFFICIENCY ATMOSPHERIC VENT GAS WATER HEATER TABLE OF CONTENTS SAFE INSTALLATION, USE AND SERVICE WARNING DANGER WARNING CAUTION CAUTION Fire or Explosion Hazard TYPICAL INSTALLATION GET TO KNOW YOUR WATER HEATER - GAS MODELS INSTALLING YOUR GAS WATER HEATER Important Information About This Water Heater Consumer Information Consumer Responsibilities Unpacking the Water Heater Excessive Weight Hazard Location Requirements Carbon Monoxide Poisoning Hazard FV Sensor Fire or Explosion Hazard Clear ance s an d Acc essi bilit y State of California Gas Pressure Gas Pressure Testing GAS SUPPLY Gas Requirements Gas Pip ing Gas Pipe Capacity Table Confined Space COMBUSTION AIR & VENTILATION WARNING Carbon Monoxide Warning Unconfined Space All Air from Inside the Building All Air from Outdoors Louvers and Grilles * Vent Pipe System Draft Hood Installation Vent Pipe Size Vent Connectors Chimney Connection Vertical Exhaust Gas Vent Piping Installation * ** FIGURE 13. Unmixed Hot Water FIGURE 15A. Temperature and Pressure Relief Valve Explosion Hazard T&P Relief Valve and Pipe Insulation Electrical Connections WARNING Solar Installation Page DANGER: Operating Instructions TO TURN OFF GAS TOAPPLIANCE "GAS CONTROL" WARNING: Checking the Draft Burn Hazard Water Heater Operation Burner Flames Emergency Shut Down Water Temperature Regulation Operational Conditions COOLER HOTTER Draining and Flushing Routine Preventive Maintenance Removing the Burner from the Manifold/ Burner Assembly Replacement Parts Removing the Manifold/Burner Assembly Temperature and Pressure Relief Valve Explosion Harzard Replacing the Flame Sense/Hot Surface igniter Assembly External Inspection & Cleaning of the Air Intake Chamber Screen Cleaning the Combustion Chamber and Air Diverter Assembly Replacing the Manifold/Burner Assembly Page TROUBLESHOOTING CHART Pressurized Combustion Chamber System Operational Checklist Page CONTROL DISPLAY TROUBLESHOOTING supplied by the water heater manufacturer. CONTROL DISPLAY STATUS PROBLEM SOLUTION ECO and OPEN Flashing 5. cont. 6. P-SW, OPEN, and CLEAN SCREEN Flashing 10. FV-SENSE Flashing cont. CONTROL DISPLAY STATUS PROBLEM SOLUTION FV-SENSE and OPEN Flashing P-ANODE Flashing 17. TROUBLESHOOTING FLOWCHART Please Note: REPAIR PARTS ILLUSTRATION Repair Parts List LEGEND Listed Parts Kits and Illustrations Page Page Page LIMITED RESIDENTIAL GAS WARRANTY