To turn on your RELIANCE WATER HEATER CO 6-50-DURS 50 Gallon 4500 W Electric Water Heater after the power is hooked up, follow these steps: Ensure Power is On: Make sure the circuit breaker or fuse for the water heater is turned on. Check the Thermostat: Set the thermostat to your desired temperature. The standard setting is usually around 120°F (49°C). Wait for Heating: Allow the water heater some time to heat the water. You should hear the heating elements turn on and start warming the water. If you encounter any issues or need more detailed instructions, you can refer to the owner's manual or contact Reliance Water Heater's customer support for assistance.