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Table of Contents
PLEASE LEAVE THIS MANUAL WITH THE OSO UNIT AFTER INSTALLATION
OSO Super S front view
Thank-you for purchasing the OSO Super S unvented hot water cylinder.
Designed to be simple and neat to install, the Super S differs from other unvented cylinders in that all of the
principle connections, including hot and cold water pipes, expansion vessel and primary heating pipes on indirect
units are connected to the top of the cylinder. Full size template is provided to facilitate pipe positioning.
OSO advise that the connecting pipes and electrical cables are fixed in place prior to the positioning of the cylinder. Moving
the cylinder into position should be the last thing done before connection of pipes and commissioning of the cylinder.
This manual gives detailed advice for installation and should be read carefully prior to fitting any unvented unit. Where
components are supplied only for indirect units, this is clearly shown. OSO Super S 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 UNDER THE CYLINDER TOP LID. THE
MANUAL AND ATTACHED LOGBOOK SERVE AS THE CYLINDER GUARANTEE.
OSO Hotwater UK Ltd.
Installation Manual
For capacities 120 - 300 litres
Super S
Contents
1. General information ........................... 2
2. Cylinder Specifications ...................... 3
3. Preparation of installation area .......... 3
4. Connection of Pipework ..................... 4
5. Commissioning and filling up ............. 5
6. Electrical connection .......................... 5
7. Safety and Servicing ........................ 10
8. Fault finding ..................................... 11
10. Benchmark Logbook........................ 13
Top view 120-250 l.
Page no.
Top view 300 l.
Super S 4-10
1
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Summary of Contents for OSO Super S
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Page 1: Table Of Contents
Thank-you for purchasing the OSO Super S unvented hot water cylinder. Designed to be simple and neat to install, the Super S differs from other unvented cylinders in that all of the principle connections, including hot and cold water pipes, expansion vessel and primary heating pipes on indirect units are connected to the top of the cylinder. -
Page 2: General Information
(the cylinder should not be positioned until the connecting pipework and cables are fitted) There are few restrictions on the siting of the OSO Super S, however it should not be sited anywhere open to frost attack. The unit should be placed on a stable flat surface capable of withstanding the weight of the cylinder when full (see table on page 12) and access must be allowed for maintenance purposes. -
Page 3: Cylinder Specifications
3.1 Pipework. The OSO Super S has all pipework connections at the top of the cylinder with these pipes secured to the rear wall. A template is provided to assist in the placement of these pipes. Decide where the cylinder is to be positioned and secure the wall template (using supplied adhesive) with the cross on the back wall at least 326mm from the left wall. -
Page 4: Connection Of Pipework
4. Pipe Connection & Commissioning Before connecting the cold supply, flush the cold supply pipework of all flux and debris. Lift off the cylinder lid allowing access to the combination valve and other connections. 4.1 120-250 l.: Check the expansion vessels and hose connections are tight. 300 l.: Fit the expansion vessel and bracket on a suitable wall close to the cylinder. -
Page 5: Commissioning And Filling Up
Motorised valve: To comply with regulations governing the installation of indirect unvented cylinders, a motorised valve must be fitted in the primary pipework. 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. The motorised valve will also control the temperature of the domestic stored water via the cylinder thermostat, which is located in the electrical box. - Page 6 S Plan Wiring Layout ST9400...
- Page 7 S Plan System Schematic 2 Port Valve (supplied) Automatic by-pass Pump flow ST9400 00071259 00071259...
- Page 8 Y Plan Wiring Layout ST9400...
- Page 9 Y Plan System Schematic 2 Port Valve Mid Position Valve (supplied) (not supplied) Automatic by-pass Pump flow ST9400...
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Page 10: Safety And Servicing
7. Safety and Servicing Maintenance must be carried out by a competent person. Safety Cut-out 1. The safety cut-out operates if: a. Wiring is incorrect. b. The immersion heater thermostat or cylinder thermostat fails. Thermostat is set too high. 2. Remember before resetting the safety cut-out or altering the thermostat setting, isolate electrical supply to the unit prior to removal of the electrical box lid. -
Page 11: Fault Finding
8. OSO Fault Finding Guide FAULT POSSIBLE CAUSE SOLUTION No water flow from hot taps. 1. Mains supply off. 1. Check and open stopcock. 2. Strainer blocked. 2. Turn off water supply. Remove strainer and clean (see Servicing Procedure page 10). -
Page 12: Technical And Performance Specs
Phone: (0191) 482 0800 • Fax: (0191) 491 3655 Expansion vessel flexible hose 91911 300 l. only E-mail technical.uk@oso-hotwater.com Gasket for expansion vessel 73870 E-mail spareparts.uk@oso-hotwater.com E-mail sales.uk@oso-hotwater.com All replacement parts should be supplied by OSO HOTWATER (UK) LIMITED. www.oso-hotwater.com... -
Page 13: Benchmark Logbook
C O L L E C T I V E M A R K... - Page 14 Open at least one hot water tap once per week, during a period of at least 4 weeks. 6. The OSO unvented cylinder has not been modified in any way other than by OSO Hotwater and is only used for the storage of potable water.
- Page 15 °C °C...
- Page 16 SERVICE 1 SERVICE 2 DATE: DATE: ENGINEER NAME ENGINEER NAME COMPANY NAME COMPANY NAME TEL No. TEL No. COMMENTS COMMENTS SIGNATURE SIGNATURE SERVICE 3 SERVICE 4 DATE: DATE: ENGINEER NAME ENGINEER NAME COMPANY NAME COMPANY NAME TEL No. TEL No. COMMENTS COMMENTS SIGNATURE...