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2. INSTALLATION
2.1 Health and safety regulations
Handling Operations Regulations 1992 defines
manual handling as: “any transporting or support-
ing of a load (including the lifting, putting down,
pushing, pulling, carrying or moving thereof by
hand or bodily force”. The Regulations set no spe-
cific requirements such as weight limits. However
common sense still has to be used based on an er-
gonomic approach for each individual. The Super
SX should be transported and stored in a vertical
position.
2.2 Siting the Super SX
The cylinder should not be positioned un-
til the connecting pipework and cables are
fitted. There are few restrictions on the siting of
the OSO Super SX, however it should not be sited
anywhere open to frost attack. The unit should be
placed on a stable flat surface capable of with-
standing the weight of the cylinder when full (see
table on page 20) and access must be allowed for
maintenance purposes. Prior to positioning the
cylinder, wind out the feet in the base to protrude
by 10 mm (35 mm if using optional wall bracket). If
wall mounted with an OSO wall bracket, the wall
should be capable of withstanding the forces gen-
erated by the weight of the full cylinder. Provision
should also be allowed for the routing of the dis-
charge pipe away from the cylinder to an outside
point according to building regulation G3.
2.3 Component check list
Components supplied with the unit in a separate
accessory kit for site fitting:
•
Expansion vessel with wall bracket (300 l. only)
•
Tundish (incl. screws)
•
Plastic cable clamp
Components factory fitted:
•
Expansion vessel(s) 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), blank-
ing cap for balanced cold water connection,
temperature & pressure relief valve and hot
water blending valve.
Documentation supplied:
•
Installation manual & service logbook
•
Template for connecting pipework
•
Immersion heater(s) - 3 kW
•
Thermostat(s) / thermal cut-out
•
Drain cock
•
Lid for cylinder.
2.4 Supply requirements
An uninterrupted 22 mm cold water mains supply
is recommended, however if only a 15 mm supply is
available, this may be used provided there is suffi-
cient flow rate available. A minimum standing pres-
sure 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 compro-
mised. The OSO unvented unit is designed for use
with supply pressure up to 8 bar. For pressures
over 8 bar an additional pressure reducing valve
must be fitted in the supply pipe to the unit.
2.5 Expansion vessel
Super SX 120-250: Twin expansion vessels
(single on 120) are factory fitted to the multi-
function valve using the supplied flexible hose.
SuperSX 300: An external expansion vessel is pro-
vided to be connected to the multifunction valve.
The vessel(s) accommodate expanded water when
the cylinder is heated and prevents the cylinder
reaching its maximum working pressure.
2.6 Wall mounting
Wall mounting brackets are available for OSO un-
vented units Super SX 120-180.
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