A.O. Smith 160M, 200M, 225M, HW-120M

ELECTRICAL WIRING DIAGRAMS FOR THE HW-120M, 160M, AND 200M WATER HEATERS

I.I.D. SYSTEM (PROPANE)

FIGURE 12

NOTES:

Contents

Main MODELS HW-120M, 160M, 200M, 225M COMMERCIAL GAS COPPER HEAT EXCHANGER W ATER HEATER BURKAY UP-FLOW MODELS Including Models with Intermittent Pilot Ignition (I.I.D.) Installation Operation Maintenance Limited Warranty ROUGH-IN-DIMENSIONS HEATER PERFORMANCE DAT A FOREWORD TABLE OF CONTENTS GENERAL SAFETY INFORMATION PRECAUTIONS GROUNDING INSTRUCTIONS CHEMICAL VAPOR CORROSION LIQUID PETROLEUM MODELS HIGH ALTITUDE INSTALLATIONS AUTOMATIC GAS SHUTOFF CONTROL FEATURES CIRCULATING PUMP TANK TEMPERATURE CONTROL (Not Supplied) SAFETY FLOW SWITCH (Not Supplied) DRAIN VALVE (Not Supplied) THERMOMETERS (Not Supplied) INSTALLA TION INSTRUCTIONS IMPORTANT REQUIRED ABILITY LOCATION INSTALLATION CLEARANCES VENTING RELIEF VALVE HARD WATER CLOSED WATER SYSTEM WATER LINE CONNECTIONS WATER (POTABLE) HEATING PIPING DIAGRAMS Page Page GAS CONNECTIONS ELECTRICAL INFORMATION Page OPERATION IMPORTANT GENERAL FILLING PURGING OF GAS LINE OPERATING INSTRUCTIONS FOR I.I.D. MODELS OPERATING INSTRUCTIONS TO TURN OFF GAS TO APPLIANCE FOR YOUR SAFETY READ BEFORE OPERATING CHECKING AND ADJUSTING THE INPUT SERVICE INFORMATION PILOT AND MAIN BURNER MAINTENANCE I.I.D. PILOT BURNER PROTECTOR SWITCH (Coil High Limit - All Heaters) TANK TEMPERATURE CONTROL AUTOMATIC GAS SHUTOFF CONTROL THERMAL BALANCER INSPECTING THE HEAT EXCHANGER AND VENTING SYSTEM PREVENTIVE MAINTENANCE RECOMMENDED PROCEDURE FOR PERIODIC REMOVAL OF LIME DEPOSITS FROM COIL TYPE COMMERCIAL WATER HEA TERS GAS PRESSURE REGULATOR RELIEF VALVE CIRCULATING PUMP DELIMING SOLVENTS REMOVING LIGHT DEPOSITS HEAVY LIME DEPOSITS CHART 1 - CER-TEMP 80 RECOVERY SYSTEM CHECKOUT PROCEDURE CHECKOUT Page Page Page MODEL HW LIMITED WARRANTY 2. CONDITIONS AND EXCEPTIONS 3. SERVICE AND REPAIR EXPENSES 4. LIMITATIONS ON IMPLIED WARRANTIES 5. CLAIM PROCEDURE A