This document is an owner's manual for Kenmore Power Miser 8+ Electric Water Heaters, manufactured by Sears, Roebuck and Co. These water heaters are designed for potable water heating only and are not suitable for space heating. The manual covers various models with different capacities and element configurations.
Function Description:
The Kenmore Power Miser 8+ Electric Water Heater is designed to heat potable water for residential use. It utilizes electric heating elements to raise the water temperature to satisfy needs such as bathing, washing clothes, and dishwashing. The "Power Miser 8+" designation suggests an emphasis on energy efficiency. The system includes thermostats for temperature regulation and a temperature-pressure relief valve for safety. Some models feature a convertible lower element, allowing for adjustment of its wattage.
Important Technical Specifications:
The manual lists several models with varying capacities and electrical specifications:
- Model 153.318160: 30 Gallons Short, 23" diameter, 30" height. Recovery rate: 17.3 GPH @90°F rise (3800W), 25.0 GPH @90°F rise (5500W). Wire size: 12 gauge (20 Amps) for 3800W, 10 gauge (30 Amps) for 5500W.
- Model 153.318260: 40 Gallons Short, 25" diameter, 32.5" height. Recovery rate: 17.3 GPH @90°F rise (3800W), 25.0 GPH @90°F rise (5500W). Wire size: 12 gauge (20 Amps) for 3800W, 10 gauge (30 Amps) for 5500W.
- Model 153.318360: 30 Gallons, 19" diameter, 45.625" height. Recovery rate: 17.3 GPH @90°F rise (3800W upper/3800W lower), 25.0 GPH @90°F rise (3800W upper/5500W lower). Wire size: 12 gauge (20 Amps) for 3800W, 10 gauge (30 Amps) for 5500W.
- Model 153.318460: 40 Gallons, 19" diameter, 59.625" height. Recovery rate: 17.3 GPH @90°F rise (3800W upper/3800W lower), 25.0 GPH @90°F rise (3800W upper/5500W lower). Wire size: 12 gauge (20 Amps) for 3800W, 10 gauge (30 Amps) for 5500W.
- Model 153.318560: 52 Gallons, 21" diameter, 59.625" height. Recovery rate: 17.3 GPH @90°F rise (3800W upper/3800W lower), 25.0 GPH @90°F rise (3800W upper/5500W lower). Wire size: 12 gauge (20 Amps) for 3800W, 10 gauge (30 Amps) for 5500W.
- Model 153.318660: 66 Gallons, 23" diameter, 60.625" height. Recovery rate: 17.3 GPH @90°F rise (3800W upper/3800W lower), 25.0 GPH @90°F rise (3800W upper/5500W lower). Wire size: 12 gauge (20 Amps) for 3800W, 10 gauge (30 Amps) for 5500W.
- Model 153.318860: 82 Gallons, 25" diameter, 60.625" height. Recovery rate: 17.3 GPH @90°F rise (3800W upper/3800W lower), 25.0 GPH @90°F rise (3800W upper/5500W lower). Wire size: 12 gauge (20 Amps) for 3800W, 10 gauge (30 Amps) for 5500W.
All models operate on 240 volts. The wiring size is based on standard 60°C copper wire. GAMA certification applies to residential electric water heaters with capacities of 20 to 120 gallons, input rating of 12 Kw or less at a voltage no greater than 250 V. The maximum hydrostatic working pressure is 150 PSI.
Usage Features:
- Temperature Regulation: The water heater's thermostats are factory set at approximately 120°F (Hot) to reduce the risk of scalding. The upper thermostat (on dual element models) is not adjustable. The lower thermostat is adjustable, allowing users to increase or decrease the temperature setting. Settings range from HOT (120°F) to VERY HOT (160°F), with intermediate settings for 130°F, 140°F (lowest for dishwashers), and 150°F. Users are advised to set the dial lower whenever possible.
- Convertible Lower Element: For specific models, the lower element can be converted from 3800 watts to 5500 watts on a 240-volt system to increase recovery rate. This conversion requires checking power supply (240V), wiring (10 gauge AWG), and circuit breakers/fusing (30 amp loading) to ensure compliance with local codes and electric utility rules.
- Safety Features:
- Temperature-Pressure Relief Valve (T&P Valve): A combination T&P relief valve is installed, certified to ANSI Z21.22 and ASME requirements. It must be installed directly into the designated fitting, positioned downward, with tubing discharging within 6 inches above or at any distance below the structural floor, without contact with live electrical parts. The discharge opening must not be blocked or reduced. The valve must be manually operated at least once a year to ensure proper function.
- High Temperature Shut Off System (ECO): The water heater includes a high limit shut-off system with a red reset button located in the upper thermostat. If the high limit trips, it indicates a potential problem and requires investigation before resetting.
- Indicator Light: Dual element models feature an indicator light that illuminates when there is little or no hot water in the tank, turning off once the upper portion of the tank is sufficiently heated.
- Installation: The manual provides detailed instructions for installation, including removing an old water heater, locating the new one, water piping connections (using flexible connectors and Teflon tape), and electrical wiring. It emphasizes the importance of proper drainage provisions and, if necessary, installing a drain pan.
- Draining: Instructions are provided for draining the water heater, which is necessary for maintenance or if the unit is shut down during freezing temperatures.
Maintenance Features:
- Element Cleaning/Replacement: The manual provides instructions for cleaning or replacing heating elements. This involves turning off electrical and water supplies, draining the tank, removing access panels, disconnecting wires, and unscrewing the element. Cleaning can be done by scraping or soaking in vinegar/de-liming solution. When replacing, a new gasket must be used, and the replacement element must match the original voltage and wattage.
- Drain Valve Washer Replacement: Instructions are given for replacing the drain valve washer, which may be necessary if leaks occur. This involves draining the tank, removing the hex cap, replacing the washer, and reassembling.
- Troubleshooting Guide: The manual includes a comprehensive troubleshooting guide for common issues such as "Not Enough or No Hot Water," "Water is Too Hot," "Strange Sounds" (rumbling noise due to mineral deposits), and "Thermal Expansion." It advises users to check electrical supply, thermostat settings, and for leaks.
- Regular Inspections: Users are encouraged to manually operate the T&P relief valve at least once a year. Periodic draining and cleaning of sediment from the tank are also recommended.
- Service: For persistent issues or if uncertain about operation, users are advised to contact Sears Repair Services.
The manual stresses safety throughout, with numerous warnings about electrical shock, scalding from hot water, and property damage from leaks or improper installation. It also highlights the importance of adhering to local codes and electrical utility rules.
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