gledhill Torrent GreenHeat TGH140-OV Design, Installation & Servicing Instructions page 24

INSTALLATION
S Plan Open Vented Heating System Including Solar Input
Solar pumping station
Pressure Expansion
relief vessel
Y Plan Sealed Primary Heating System Including Solar Input
Solar pumping station
Pressure Expansion
relief vessel
Sealed
system
kit
TORRENT GREENHEAT SOL
Solar
controller
Auxiliary
Min. 250mm
central
heating
Solar
controller
Auxiliary
central
heating
Page 24
Solar heating circuit
The Torrent SOL is an advanced thermal store
and has been designed to incorporate existing
boiler and central heating controls and is based
on the tried and tested standard Torrent range.
Therefore general design requirements for
hot and cold water systems, for ball valve and
overfl ow, for water treatment and for heating
system design should be taken into account
when designing the Torrent SOL based systems.
The diagram opposite shows the Torrent SOL
type used in a traditional open vented heating
system. The water level in the F&E tank should
be at least 250mm above the highest point of
the heating system e.g. a radiator.
In the open vented system shown opposite,
the thermal store, radiator heating circuit and
the auxilliary heating circuit are all fed from
the same feed and expansion tank. Therefore it
should be sized to accommodate the expansion
of total water content of the complete system
(i.e. water content of the store + water content
of radiator heating circuit + water content of
under-fl oor heating circuit).
The diagram opposite shows the sealed
primary 'SP' variant of the Torrent SOL used
in a typical sealed heating system. With this
system arrangement, although the boiler and
the radiator central heating circuits are sealed,
both the store and the auxilliary heating circuit
(if installed) are open vented. Therefore the
feed and expansion tank should be sized to
accommodate the expansion of total water
content of the open vented system (i.e. water
content of the store + water content of under-
fl oor heating circuit).
The diagrams also show typical confi gurations
of a solar thermal system with Torrent SOL,
which will accumulate the energy from more
than one renewable energy sources (e.g. solar,
wood burning stove).
In the open vented system, this energy is
available for hot water and at low level for both
radiator and under-floor (if installed) space
heating circuits. However in the sealed primary
system configuration, this energy is only
available for hot water and at low levels for the
under-fl oor space heating circuit (if installed).