INSTALLATION
TECHNICAL DOCUMENTATION
09
INSTALLATION
IMPORTANT: Please read and understand these instructions before installing the Rapide Extreme hot water
loading system. Incorrect installation may invalidate the guarantee.
The Rapide Extreme must be installed by a competent installer in accordance with Building Regulation G3
(England and Wales), Technical Standard P3 (Scotland) or Building Regulation P5 (Northern Ireland).
Siting the Rapide Extreme
The Rapide Extreme must be vertically floor mounted. It can be placed anywhere convenient provided the
discharge pipe(s) from its safety valve can be correctly installed. Areas that are subject to freezing must be
avoided. Ensure that the the floor is of sufficient strength to support the full weight of the unit. Pipe runs should
be kept as short as possible for maximum economy. Access to associated controls and immersion heater (if
installed) should be possible for servicing and maintenance of the system.
Over Heat Protection Device
The supplied two port spring return valve must be fitted to the primary flow or return pipework to the cylinder
as part of the over heat protection for the cylinder to comply with G3 regulations. See wiring diagram for
electrical connection information.
Protection Against Under Pressure
A suitable form of protection should be fitted to prevent damage occuring to the cylinder; in the event the
cylinder is subjected to a vacuum.
Application
The Rapide Extreme is suitable for both open vented (storage tank fed) or unvented applications.
Open Vented Applications
This application utilises feed from a storage tank and where the system is open to atmosphere via a vent pipe
(usually discharging back in to the storage tank). Available pressure is subject to the static head i.e. the height
of the storage tank above the Rapide Extreme. In open vented applications it is recommended that the cold
water feed pipework and the domestic hot water flow pipe are sized according to the Rapide Extreme
tapping size to ensure maximum flow rates.
When installing the Rapide Extreme on to an open vented system we strongly recommend that a strainer / filter
of 100 micron mesh is installed on the domestic hot water return pipework and cold water feed pipework,
failure to do so may invalidate the guarantee.
