CEPT • A UNIQUE CONCEPT • A UNIQUE CONCEPT • A UNIQUE CONCEPT • A UNIQU E CON C EP T • A U N IQ U E C O NC E P T • A U - the complete package DS (B) 6pp Issue 1

Why install Oso Dualstream over conventional unvented systems? For many years domestic plumbing practices in the United Kingdom have relied on cold storage tanks in the loft and hot water cylinder. Unvented hot water cylinders have been approved and installed since the late 1980s and have many benefits to the end user, specifiers, developers and installers. • High performance mains pressure showering - no shower pump required • The Oso Dualstream is supplied with an adjustable pressure reduction valve. This means pressure to all mains water outlets can be adjusted between 0.5 bar to 5 bar • No...

Each Oso Dualstream system is supplied with a comprehensive illustrated manual, which takes you through the installation process. To speed up installation time the Oso Dualstream system is supplied as a pre-fabricated assembly which includes: Combination valve comprising non-return valve, line strainer, adjustable pressure reduction valve (prv) with pressure gauge (prv preset at 3.5 bar adjustable on site between 0.5 bar and 5.0 bar) 8 bar expansion relief valve linked to the tundish. Systems supplied with cylinders of 250 litres and above will be supplied with 1’’ combination valve which includes...

Unrivalled Performance Choosing your Oso Dualstream system To obtain the very best performance from your Oso Dualstream system the accumulator must be sized correctly, as it is the driving force supplying simultaneous hot and cold water demand to the building. The accumulator will hold 50% - 70% of its volume dependant upon the set operating pressure. Ideally the accumulator should recover its contents in less than 15 minutes following water usage. Recovery however is dependant upon flow rate from the main supply, which can vary. When choosing your Oso Dualstream, consider the following: • Mains...

This unique range of accumulators feature a patented controlled action diaphragm with special diffuser to prevent stratification. • Maximum working pressure 10 bar (shell) • Maximum operating temperature 70°c • The Oso Dualstream accumulator is supplied with a pre-charge of 2bar to give 1.5bar differential between the accumulator pressure and the 3.5bar pressure reducing valve (PRV) setting. If a higher or lower PRV setting is required, the accumulator pressure must be raised or lowered to maintain the 1.5bar differential. However do not reduce the accumulator pressure below 0.5bar (7PSI). Nominal...

Oso Dualstream Technical Specification - Cylinder Unrivalled Performance DIRECT INDIRECT 3 9 4 10 17 16 11 15 7a 14 14 8 7 7 7 13 6 5 3 9 4 10 17 16 11 15 7a 2 14 1 18 8 13 6 5 KEY H A D H A D †† Wall Fixing bracket available as an extra In known hard water regions where lime scale deposits occur, it is advisable to take precautions to prevent it’s formation in your OSO water cylinder. 1 Return (Indirect only) 2 Flow (Indirect only) 3 Pressure reducing valve 4 Check and expansion valve 5 Temperature and pressure relief valve 6 Tundish 7 Immersion heater 7a Thermostat 8 Cold feed tube 9 Hot water...