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1. | A O Smith Water Heater ITS 300 ManualITS Dual coil indirect calorifier ITS - 300/400/500/600/750/1000 Indirect water heater (calorifier) for a wide range of applications Single-wall spiral heat exchanger PermaGlas Ultra CoatTM second-generation glass coating technology prevents corrosion ITS 300: Three adjustable legs facilitate easy installation ITS 400-1000: Insulated ring base for easy installation Insulated access cover for comprehensive waterside maintenance Replaceable magnesium anode Options: Flexible m... Brands:A | User Manual | ENGLISH | [View] | ||||||||||