General Information - OSO Super S Installation Manual

1. General information

1.1 Health and Safety regulations.
Handling Operations Regulations 1992 defines manual handling as: "any transporting or supporting of a load
(including the lifting, putting down, pushing, pulling, carrying or moving thereof) by hand or bodily force" The Regulations
set no specific requirements such as weight limits. However common sense still has to be used based on an ergonomic
approach for each individual. The Super S should be transported and stored in a vertical position.
1.2 Siting the Super S
(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.
If wall mounted with an OSO wall bracket, the wall should be capable of withstanding the forces generated by the
weight of the full cylinder. Provision should also be allowed for the routing of the discharge pipe away from the cylinder
to an outside point according to building regulation G3. (See page 11 & 15)
1.3 Component Check list
Components supplied with the unit in a separate accessory kit for site fitting:
• Expansion vessel with wall bracket (300 l. only).
• Flexible hose for expansion vessel (300 l. only).
• Tundish (including screws).
• Plastic cable clamp.
• Flexible Y-hose.
• Motorised valve (indirect only).
• Elbows (2) for primary heating connections (indirect only).
Components factory fitted
• Expansion vessels with T piece connector.
• Flexible hose for expansion vessel.
• Combination valve, includes line strainer, pressure reducing valve,
balanced cold water connection, (for shower or bidet only),
blanking cap for balanced cold water connection, temperature
& pressure relief valve and hot water blending valve.
• Immersion heater(s) - (3kW).
• Thermostats / thermal cut-out.
• Drain Cock.
• Lid for cylinder.
1.4 Supply requirements
An uninterrupted 22mm cold water mains supply is recommended, however if only a 15mm supply is available, this
may be used provided there is sufficient flow rate available.
A minimum standing pressure of 2.5 bar and a flow rate of 20 litres per minute with a 1 bar dynamic pressure
is recommended. The cylinder will operate at lower pressures and flow rates however the performance will be
compromised. The OSO unvented unit is designed for use with supply pressure up to 10 bar. For pressures over 10
bar an additional pressure reducing valve must be fitted in the supply pipe to the unit.
1.5 Expansion vessels - description and product use
120-250 l.: Twin expansion vessels (single on 120 litre) are factory fitted to the multifunction valve Part K (see fig 1,
page 3) using the supplied flexible hose.
300 l.: An expansion vessel is provided to be connected to the multifunction valve Part K (see fig. 1, page 3) using the
supplied flexible hose.
The vessel(s) accomodate expanded water when the cylinder is heated and prevents the cylinder reaching its maxi-
mum working pressure.
1.6 Compatible fittings and components
All thermostatically controlled boilers are compatible with indirect OSO cylinders.
1.7 Non-compatible products.
Solid fuel boilers, wood burning stoves and other non-thermostatically controlled heat sources must not be used with
unvented cylinders.
1.8 Wall mounting
Wall mounting brackets are available for OSO unvented units 120-210 litres capacity.
2
Documentation supplied
• Installation manual & benchmark logbook
• Template for connecting pipework
• Adhesive for template
• Guarantee card