Bradford White® Flammable Vapor Sensor, For Use With: Model PE2XR504T(BN,SX), PE4403S(BN,SX) and PE440T(BN,SX) Water Heater

Bradford White 55 Gallon Upright Tall Residential Electric Water Heater. 6-Year Tank Warranty, 6/4.5 kW, 240/208 Volts, Single Phase. The -284 indicates that this SKU comes with an Incoloy Element.