Close the main cold and hot water isolation valves to isolate the water heater from the rest of the house.
Feed the power wires through the strain relief clamp on the electrical box. Connect the ground wire to the green grounding screw. xyfb water heater manual
If your XYFB water heater is leaking internally, making buzzing sounds, or giving unlisted error codes, discontinue use and contact a qualified technician. Do not attempt to open the sealed heating chamber yourself. Close the main cold and hot water isolation