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INSTALLATION 4
4-1 BUILDING CONTROL
To install an OSO Dualstream System the installer must be fully competent, suitably qualified and possess any
applicable licence that may be required by the local inspectorate for installation of an unvented hot water storage
system.
In some areas the Local Authority may require notification by means of a building notice or by the submission of
full plans for the proposed installation of an unvented hot water storage system.
4-1.1 Regulations
The Water Byelaws and Current Building Regulations should be considered when installing an OSO
Dualstream System.
4-1.2 Electrical Regulations
All wiring must be to current lEE Wiring Regulations.
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.
The floor must give adequate support to the unit when full. (See page 3 for weights).
For maintenance purposes leave at least 500mm at the front of the unit.
The installer must ensure the space available is adequate for the cylinder and accumulator being fitted.
Note: Consult the Building Regulations for safe floor loadings.
4-2.2 Unvented Cylinder
The unvented cylinder can be sited anywhere within the thermal envelope of the dwelling. If the unit is to be sited
in an outhouse or garage, adequate frost protection must be provided; this should include an overriding frost stat
so that the system is heated in the event of low temperature.
The floor must give adequate support to the cylinder when full (See page 3 for weights). Consult the Building
Regulations for safe floor loadings.
For maintenance purposes adequate access must be available around the cylinder. Access of at least 100mm is
required above the cylinder. The cylinder must be installed vertically.
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