Owner’s Manual – Proflo Electric Storage Water Heaters8 H0421 0421 Rev. JSafetyThis appliance is not intended for useby persons (including children) withreduced physical, sensory or mentalcapabilities, or lack of experience andknowledge, unless they have been givensupervision or instruction concerninguse of the appliance by a personresponsible for their safety.Children and animals should besupervised to ensure that they do notinterfere with the appliance.Filling The Water HeaterOpen all hot water taps. Open isolatingvalve at the cold water inlet slowly andallow water heater to fill until water flowsthrough the system. Close each hotwater tap after the air is expelled fromits line. As noted previously power is notto be turned on until the water heater isfilled with water.Water QualityYour Dux water heater has beenmanufactured to suit water conditions ofmost Australian metropolitan supplies.Please note that harsh water suppliescan have a detrimental effect on thewater heater and its life expectancy. Ifyou are unsure about your water qualityyou can obtain information from yourlocal water supply authority.The water heater is designed for usein areas where the Total DissolvedSolids (TDS) content of the watersupply is less than 2500 mg/L. In areaswhere the TDS exceeds 600mg/L itis possible that the magnesium alloyanode (supplied in the heater) maybecome over-reactive. To alleviate this,the magnesium alloy anode should bereplaced with an aluminium alloy anode,available from your local Dux supplier.Water can also be very corrosive, themeasure of this is the saturation index.If the water saturation index is greaterthan 0.40, an expansion control valveshould be fitted. If the index is greaterthan 0.80, the water heater installedshould be a Hard Water Model. Pleaseconsult our Service Department foradvice if required.CautionIf the water heater is left in an operatingcondition and unused for two weeks ormore, a quantity of hydrogen (which ishighly flammable) may accumulate in thetop of the water cylinder. To dissipatethis gas safely it is recommended thata hot tap be turned on for severalminutes at a sink, basin or bath, but nota dishwasher, clothes washer or otherappliance. During this procedure theremust be no smoking, open flame orany other electrical appliance operatingnearby. If hydrogen is dischargedthrough the tap it will probably make anunusual sound as with air escaping.Where the water heater is notinstalled in accordance with the listedadvice, the water heater will not becovered by the Terms of Warranty.Operating Instructions