A.O. Smith 318257-000 - Manuals

5 Water System Piping Piping, fi ttings, and valves should be installed according to the installation drawing (Figure 4). If the indoor installation area is subject to freezing temperatures, the water piping must be properly insulated. Water supply pressure should be 50-60 PSIG and not exceed the ma...

6 Please note the following: • The system should be installed only with piping that is suitable for potable (drinkable) water such as copper, CPVC, or polybutylene. This water heater must not be installed using iron piping or PVC water piping. • Use only pumps, valves, or fittings that are compatibl...

8 Locate the hot water (outlet) & cold water (inlet) pipes 4. to the water heater.Locate the slit running the length of a section of pipe 5. insulation.Spread the slit open and slip the insulation over the 6. cold water (inlet) pipe. Apply gentle pressure along the length of the insulation to en...

9 Figure 8AJunction Box Ground Wire Conduit(Field Connection) Black Wire Red Wire Green Ground Wire Red Black Approved Connectors Figure 9Wiring Diagram Overload Protection To 240v 1 Phase Power supply Electrical Service ground L1 L2 Circuit Breaker Ground Wire Green Connecting the Condensate Pump O...

10 Water Heater Location Centrally located with the water piping system. □ The fl ooring beneath the water heater must be able to □ support the weight of the water heater when fi lled with water (967 lbs. full). Located indoors (such as a basement or garage) □ and in a vertical position. Sheltered f...

11 OPERATING YOUR WATER HEATER Before Using Make sure the water heater has been properly 1. installed. See “Installing Your Water Heater” section.Make sure the air filter is correctly seated, as it may 2. shift during shipping or installation. See “Repair Parts Illustration” section.Completely fill ...

12 Adjusting the User Interface Module/Operational Modes °F/°C LOCK HEAT PUMP ELEMENT EFFICIENCY F VACATION ELECTRIC HYBRID EFFICIENCY Power Button: On - Green Standby - Red Temperature Down (Decrease)Button Temperature Up (Increase)Button Operational Mode Buttons Water TemperatureSet Point Water He...

13 Operational Conditions Powered Anode Operation To shelter the glass-lined water tank from corrosion through electrolysis, this water heater is equipped with a non-sacrificial powered anode which should not need to be replaced under normal operating conditions. If the powered anode malfunctions it...

14 MAINTENANCE OF YOUR WATER HEATER Temperature and PressureRelief Valve Manually operate the temperature and pressure relief valve at least once a year to make sure it is working properly. To prevent water damage, the valve must be properly connected to a discharge line which terminates at an adequ...

15 Remove the access cover(s), then remove the foam 4. insulation block. Remove the protective plastic cover(s) over the 5. elements from their attachment point. Disconnect the electrical wires from the heating 6. element(s) by loosening the screws (Figure 12). Remove the screw-in element(s) by turn...

16 DIAGNOSTIC CODES DISPLAY SHOWS INDICATES CORRECTIVE ACTION UPPER ELEMENT CONNECT FAULT 1. Upper element is not functioning Turn off power at the circuit breaker/fuse 1. box and check for a loose connection at the element. For access directions see “Heating Element Replacement” section. If error p...

17 TROUBLESHOOTING CHART PROBLEM POSSIBLE CAUSE(S) CORRECTIVE ACTION NO HOT WATER Hot water usage pattern exceeds the 1. capability of the water heater in current mode No power to the water heater 2. Unit in standby 3. Unit in Vacation mode 4. High temperature limit switch open 5. Non-functioning up...

18 REPAIR PART ILLUSTRATION ITEM NO. PARTS DESCRIPTION 1 Upper Access Cover 2 Lower Access Cover 3 Upper Element (4500 Watts) 4 Lower Element (2000 Watts) 5 Energy Cut-Off (ECO) Switch 6 Temperature & Pressure Relief Valve (T&P) 7 Dip Tube (at hot water outlet) 8 Powered Anode Rod 9 User Int...