Table of Contents
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PLEASE LEAVE THIS MANUAL WITH THE OSO UNIT AFTER INSTALLATION
This cylinder is manufactured and approved in accordance with EN 12897 : 2006
Thank-you for purchasing the Delta HP VIP unvented hot water cylinder.
Delta HP VIP is an unvented hot water cylinder in capacities 200, 250 and 300 litres. Its energy
efficiency as defined by standing heat losses is the best in its class due to the use of vacuum insulated Panels
save the hou
(VIP) and will
This manual gives detailed advice for installation and should be read carefully prior to fitting any unvented unit. OSO
Delta HP VIP cylinders are not suitable for gravity fed primary systems. In known hard water regions, precautions should
be taken to prevent limescale formation in hot water cylinders, in accordance with Building Regulation Part L, Domestic
Heating Compliance Guide.
This OSO cylinder must be installed by a competent person and be installed in compliance with the OSO Installation and
Maintenance Instructions, all current legislation, codes of practice and regulations governing the installation
of unvented hot water cylinders in force at the date of installation.
PLEASE READ THIS MANUAL BEFORE INSTALLATION AND LEAVE WITH THE CYLINDER . THE MANUAL
AND ATTACHED LOGBOOK SERVE AS THE CYLINDER GUARANTEE.
OSO Hotwater UK Ltd.
For capacities 200, 250 and 300 litres
seholder significant energy costs over the lifetime of the cylinder.
Delta HP VIP
Installation Manual
Contents
1 . General information ..........................2
2. Preparation of installation area.........4
3. Pipe connections..............................4
4. Commissioning and filling up............5
5. Draining and Flushing......................5
6. Electrical Installation.........................5
7. Safety and Servicing ........................ 9
8. Fault finding.....................................10
10. Log book ........................................13
Page no.
Delta HP VIP
1
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Table of Contents
Related Manuals for OSO DGC 250
Summarization of Contents
General Information
Health and Safety Regulations
Details on health and safety regulations for handling and installing the unit.
Siting the Delta HP VIP
Guidelines for selecting an appropriate and safe location for the water heater.
Component Check List
List of components supplied with the unit for site fitting.
Components Factory Fitted
List of components pre-installed on the water heater unit.
Documentation Supplied
Information on the installation manual and log book provided with the unit.
Supply Requirements
Specifications for the cold water mains supply needed for optimal performance.
Expansion Vessels
Explanation of the function of expansion vessels in the system.
Compatible Fittings and Components
Information on compatible boilers and other necessary fittings.
Preparation of Installation Area
Positioning the Unit
Instructions on how to correctly position the water heater for installation.
Protection from Frost
Measures to protect the unit from frost damage when not operating.
Pipe Connections
Cold Water Supply
Detailed steps for connecting the cold water supply to the unit.
Hot Water Supply
Instructions for connecting the hot water outlet pipe.
Balanced Cold Water Supply (Optional)
Guidance on connecting a balanced cold water supply for showers or bidets.
Secondary Return (Optional)
Information on connecting a secondary return pipe if required.
Discharge Pipe
Requirements for installing the discharge pipe for safety valves.
Primary Flow and Return and Motorised Valve
Connecting primary flow/return for heat pumps and the motorised valve.
Commissioning and Filling Up
Commissioning
Steps to check connections, fill the system, and test safety devices.
Draining & Flushing Out the System
Draining
Procedure for safely draining the water heater for maintenance.
System Flushing
Instructions on flushing the system if foreign materials are present.
Electrical Installation
Immersion Heater Thermostat
Details on the immersion heater thermostat and its safety cut-out.
Motorised Valve
Information on the motorised valve used for primary pipework control.
Digital Dual Cylinder Thermostat and Controls
Details on digital dual cylinder thermostat, including 1-hour boost and holiday mode settings.
S Plan Wiring
Wiring for Standard Heat Pump
Diagram and guide for S plan wiring with a standard heat pump system.
Wiring with Heat Pump Differential Controller
Diagram and guide for S plan wiring with a differential controller.
Y Plan Wiring
Wiring Using OSO Thermostats
Diagram for Y plan wiring using OSO thermostats and other components.
Wiring for using Heat Pump Differential Controller
Diagram for Y plan wiring with a heat pump differential controller.
Safety and Servicing
Safety Cut-out
Explanation of the safety cut-out function and how to reset it.
Intermittent or Slow Discharge from Tundish
Troubleshooting guide for intermittent or slow water discharge from the tundish.
Continuous Very Hot Water Discharge from Tundish
Diagnosing continuous hot water discharge from the tundish.
Expansion Vessel Maintenance
Maintenance procedures for the expansion vessel, including precharge checks.
Guarantee
Information regarding the cylinder's guarantee terms and conditions.
Servicing Procedures
Step-by-step guide for servicing key components like relief valves and pressure reducers.
OSO Fault Finding Guide
Alternative Discharge
Guidance on alternative methods for discharging water safely.
Commissioning Procedure Information
Heat Pump Primary Settings (Indirect Heating Only) All Boilers
Key settings for heat pump primary systems in indirect heating setups.
All Mains Pressurised Systems
Checks and requirements for all mains pressurised water systems.
Unvented Systems
Specific checks and compliance points for unvented hot water systems.
All Products
General checks for compliance with building regulations and manufacturer instructions.
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