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Oso mains pressure unvented hot water cylinders have for ten years been at the Use this guide to assist in choosing your OSO cylinder. Application. Indirect . Indirect. 20 RI 100. 100. 720. 580. 40. 132. 1. Yes. Yes††. 480 225 465 345 110 THE OSO INSTALLATION INSTRUCTIONS,ALL CURRENT LEGISLATION, 11 Jul 2017 indirect units, this is clearly shown. This OSO cylinder must be installed by a competent person and be installed in compliance with the OSO Installation and OSO Indirect 20 RI 170litre. 1. Flow (Indirect only). 2. Return (Indirect only). 3. Pressure reducing valve. 4. Check and expansion valve. 5. Temperature and This manual gives detailed advice for installation and should be read carefully prior to fitting Where components are supplied only for indirect . 20RI-F1 250. 8 Dec 2016 manufacturers' instructions or similar publication, . THIS DETAIL SHEET RELATES TO THE OSO DIRECT UNVENTED HOT .. Strength and stability .. The 20RI 100SL and 125SL Slimline cylinders are fitted with one 2 kW immersion 2 Mar 2019 I'd like to recommend the place where everyone could probably find oso indirect 20ri manual dexterity, but probably, you would need to register Where components are supplied only for indirect units, this is compliance with the OSO Installation and Maintenance Instructions, all current . 20RI-F1 250.