5.5KW Electric Water Heater Automatic Circulation Thermostat for Swimming Pool SPA Hot Tub 380V Item Type: Water Heater Material: Stainless Steel Color: As shown in the picture Size: Approx. 44.5x34x10.5cm / 17.5x13.4x4.1in Weight: Approx.6550g/231oz Power: 5.5KW 1. Installation matters: The hot spring heater can be installed indoors or outdoors. The heater should be firmly placed on a flat, smooth and level surface; and connected to the filtering device. For maintenance convenience, leave at least 9 inches of left clearance and at least 12 inches of upper and front clearance , Leave at least 6 inches of clearance behind 2. Matters needing attention: 1. The flow of water through the heater should not be less than 20 gallons/min and no more than 120 gallons/min. Too high flow rate (generating excessive water pressure) may damage the heater. 2. The electrical installation must be grounded (with a circuit breaker protection setting'FGCI'); and check whether the grounding of the heater is reliable, and a wire slightly larger than the thickness of the power supply wire must be used as the grounding protection wire. 3. Before electrical connection or during installation, maintenance and use, the power supply must be disconnected from the source or at the circuit breaker, and measures must be taken to ensure that the circuit will not accidentally restore power by itself. 4. When installing a new machine, be sure to check the tightness of the entire circuit inside the machine, because it may loosen during loading, unloading and transportation.