5.5kw to60KW Swimming Pool Heat Pump / Electric Water Heater for Pool & SPA — Digital Display Precision Thermostat - 1_HL-150

Important: if the water pump is not properly matched to the thermostat and the water flow is too low, the heating tube may be damaged by dry burning. Pump requirements: for units below 11KW the supporting water pump must be at least 750W and provide a flow of no less than 13 cubic meters per hour. For units above 11KW the supporting pump must be at least 1.1KW with a flow of at least 18 cubic meters per hour. Start/shutdown sequence: always switch the water pump on first, then power the thermostat. When turning off, switch off the thermostat, then wait 10 seconds to 1 minute before stopping the pump. Heating capacity note: approximately 1 cubic meter of water is heated per 1KW of thermostat output; outdoor swimming pools require higher capacity.