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IM/OD/1
TECHNICAL AND INSTALLATION MANUAL
This manual gives detailed advice for installation and should be read
carefully prior to fitting the OSO Dualstream. Where components are
supplied only for indirect units, this is clearly shown.
The OSO Dualstream must be installed by a competent person and in
accordance with current Building Regulations including Guidance
Document G3.
Drawings on pages 1-18 show
22mm valves on cold water supply.
For 28mm see page 19.
HOT WATER
CAPACITY
120 - 380 LITRES
BY
OSO HOTWATER (UK) LIMITED
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Table of Contents
Related Manuals for OSO Dualstream
Summary of Contents for OSO Dualstream
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Page 1: Hot Water
OSO Dualstream. Where components are supplied only for indirect units, this is clearly shown. The OSO Dualstream must be installed by a competent person and in accordance with current Building Regulations including Guidance Document G3. -
Page 2: Table Of Contents
CONTENTS INTRODUCTION 1 INSTALLATION 4 1-1 Introduction 4-1 Building Control ......................1-1.1 How the OSO Dualstream System Works 4-1.1 Regulations ............1-1.2 System Contains 4-1.2 Electrical Regulations ..................1-1.3 System Features 4-2 Installation ......................1-1.4 Central Heating System 4-2.1 Positioning... -
Page 3: Introduction
1-1 INTRODUCTION This Handbook has been compiled to assist in the Installation and Operation of the OSO Dualstream domestic hot and cold water system. The Installer of the system should give full operating instructions to the householder for the OSO Dualstream System. -
Page 4: 1-1.4 Central Heating System
INTRODUCTION 1 1-1.4 Central Heating System The OSO Dualstream system does not affect the Central Heating installation. However consideration has to be given to the best method of connection and control of the heating system to the indirect cylinder. 1-1.5 Models Available Below is a typical selection of the systems available, other combinations can be tailored to suit requirements. -
Page 5: Hot Water Temp
To comply with regulations governing the installation of indirect unvented cylinders, a motorised valve must be fitted in the primary flow. Your OSO unit has been supplied with a two port motorised valve, which will act as a positive energy cut-out should the safety cut-out operate. - Page 6 The following information is given as a requirement of the above legislation. Great care is taken to ensure that OSO Dualstream systems are designed and manufactured to meet general safety requirements when properly used and installed as recommended in this manual.
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Page 7: Hot Water Overheating
Note: The High Limit temperature of 85°C is factory set and cannot be changed. 2-3 SHUT OFF VALVES Cylinder with immersion heater. Option A Water can be heated by any Existing The OSO Dualstream installation will conventional method. Mains Supply have a number of shut off valves, the Hot Supply Pressure relief valve... -
Page 8: 2-3.1 Stop Cock
Shuts off the hot water to the taps. 2-4 PRESSURE RELIEF The OSO Dualstream installation has a Pressure Relief Valve normally mounted on the cylinder. In the event of the pressure within the system becoming too high, the Expansion Relief Valve will open, venting the pressure. -
Page 9: Technical Information 3
TECHNICAL INFORMATION 3 3.1 SYSTEM COMPONENTS TYPICAL LAYOUT AND CONNECTIONS The accumulator must be set at between 1 and 1.5 bar below the pressure reducing valve setting. Minimum accumulator pressure 0.5 bar (7 PSI). If there is an incoming pressure of 3.5 bar or over DO NOT adjust the accumulator pressure. -
Page 10: Wiring
TECHNICAL INFORMATION 3 3-3 WIRING IMMERSION HEATER THERMOSTAT (LEFT HAND THERMOSTAT) 3-3.1 Immersion Heater and Thermostat WIRING DIAGRAM The immersion heater must be permanently connected to the electrical supply through a double-pole linked switch with a minimum break capacity of 13 amps. Please use the cable glands supplied to protect and fix electrical cables at cable entry points. -
Page 11: 3-3.2 Wiring Layout S Plan
TECHNICAL INFORMATION 3 3-3.2 S Plan Wiring Layout (Indirect only) Immersion Heater CylinderThermostat Thermostat (Right Hand) (Left Hand) For Other Boilers Refer To Boiler Manufacture... -
Page 12: 3-3.3 Wiring Layout Y Plan
TECHNICAL INFORMATION 3 3-3.3 Y Plan Wiring Layout (Indirect only) Immersion Heater Cylinder Thermostat Thermostat (Right Hand) (Left Hand) For Other Boilers Refer To Boiler Manufacture... -
Page 13: Installation
4-2 INSTALLATION 4-2.1 Positioning It is the responsibility of the installer to ensure the safe handling of the OSO Dualstream components in accordance with current Health and Safety Legislation (See page 3 for weights). If the unit is sited where it could be subjected to frost i.e. in an outhouse or garage, adequate frost protection must be provided, this should include an overriding frost stat wired so that the system is heated in the event of low temperature. -
Page 14: 4-2.3 Accumulator
0.8m of pipework. Fig. 4-2a Typical Tundish Arrangement As the OSO Dualstream Accumulator acts as the system expansion vessel, an independent expansion vessel system is not normally required. However if an independent expansion vessel is specified it should be fitted to the domestic hot water system. It may be installed in any position within the dwelling. -
Page 15: 4-2.6 Scale Protection
Due to vibration in transport it will be necessary to check for leaks after filling and pressurising system. 4-2.8 OSO Dualstream Components All OSO Dualstream components and pipework are checked at the factory prior to dispatch, however always check the connections for leaks on commissioning as transportation and installation can cause joints to move. -
Page 16: Commissioning 5
23. Check for leaks again when the system is up to temperature. 5-2 HANDING OVER Having filled in the Guarantee Form, this should be sent to OSO Hotwater (UK) Ltd. The Installer should next recheck the system and ensure it is completely satisfactory before demonstrating to the householder. The householder should be aware of the following: How to set the temperature of the tap hot water. -
Page 17: Servicing 6
SERVICING 6 6-1 ROUTINE SERVICE The OSO Dualstream system should have a routine service at least once in 12 months. IMPORTANT: Always turn off the heating system and electricity supply to the OSO Dualstream before working on the System. 6-1.1 Service Procedure Turn the Heating System OFF. -
Page 18: Spare Parts
SPARE PARTS 7 7-1 SPARE PARTS Accumulator Nominal Capacity (Litres) Part No 19608 18891 18892 18893 18894 Unvented Cylinder See page 3 for unvented cylinder details Cylinder Thermostats 80030 Immersion Heater 71255 Motorised Valve 92000 3/4’’ 1’’ Pressure Reducing Valve 510508 300129 1’’... -
Page 19: Oso Dualstream
OSO DUALSTREAM systems can be fitted close together or remote from each other offering flexibility in installation. -
Page 20: Connections
28mm CONNECTIONS 10.1 28mm Connections OSO Dualstream units with hot water capacities from 250 litres to 380 litres are available with 28 mm hot and cold connections. The combination valve supplied will incorporate an adjustable pressure reducing valve, line strainer, non-return valve, balanced cold take off and connection for expansion vessel.