Owner’s GuideSBB81FZRev. 05/22Thank you for purchasing this Dux Commercial Gas Continuous Flow Water Heater.Before using, please:Read this manual completely for operating instructions.Confirm warranty and proof of purchase.Keep this manual where it can be found whenever necessary.Installation must conform with Plumbing Code of Australia (PCA) and local codes, or in the absence of localcodes, AS/NZS 5601, AS/NZS 3500.4, AS/NZS 3000 wiring regulations and all Local Building, Water and Gas fittingregulations.Dux reserves the right to discontinue, or change at any time, the designs and/or specifications of its productswithout notice.* Note: This appliance requires a minimum flow rate to operate of 2.5 litres/min., water fixtures with a flow rateof 7.5 litres/min. or higher are recommended.For optimum performance we recommend installation of Dux optional temperature controllers.(For 50ECS and 50FCS Series, the temperature controller is supplied with appliance.)(e.g. 32ECS Series)Condensing Models50ECS Series50FCS Series32ECS Series32FCS SeriesNon Condensing Models28ENS Series28FNS SeriesFOR CONTINUED SAFETY OF THIS APPLIANCE ITMUST BE INSTALLED, OPERATED AND MAINTAINEDIN ACCORDANCE WITH THE MANUFACTURER’SINSTRUCTIONS.WARNING