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DESIGN
DESCRIPTION
should be made to power the lower immersion element in order to minimise the running
costs. It is important to note that the design heat loss, of the rooms to be heated, must
be less than the lowest immersion power. If the design heat loss is greater than this, the
heating will need to be supplemented by another heat source.
The Torrent ECO OV is designed to be heated directly (i.e. without internal heat
exchangers) by one or more of the following heat sources;
• Site fitted electric immersion heaters e.g. to utilise off peak electricity
• A remote gas or oil boiler
• A solid fuel boiler or stove
Torrent ECO SP
The Torrent ECO SP utilises a sealed system boiler as its primary energy source. It is
available with optional tappings for a woodburning or solid fuel boiler. If any of the
standard tapping are not required, they can be removed at the time of order. The
Torrent ECO SP provides high-performance mains pressure hot water.
Where a sealed primary coil is used, the thermal store is a hot water only thermal store. If
too much heat is taken out of the store, then hot water performance will be limited. The hot
water priority should be protected by use of an appropriate thermostat. The central heating
circuit is normally supplied directly from the boiler although an auxiliary heating circuit
can be connected from the store in which case the solid fuel source will provide energy
to the auxiliary heating circuit. Obviously, the energy output that can be provided by the
auxiliary heating circuit will be limited to the energy input from the solid fuel appliance.
This sealed primary (SP) model permits the use of a smaller feed and expansion tank
because the main central heating circuit does not need to be catered for. This can
make positioning the F&E tank more straightforward.
An immersion boss is provided for a site fitted immersion heater, and it is normally
envisaged that this will be used as an emergency electric back-up for hot water and
to provide emergency energy to the auxiliary heating circuit.
The Torrent ECO SP is designed to be heated by one or more of the following heat
sources;
• Directly by an electric immersion heater as a backup heat source only
• Indirectly (i.e. via a heat exchanger) by a remote gas or oil boiler
• Directly by a solid fuel boiler or stove
Torrent ECO SOL
The Torrent ECO SOL utilises either a sealed system boiler and / or an open vented
boiler as its primary energy source. It also has a high-efficiency solar coil to allow the
homeowner to benefit from a wide variety of alternative energy inputs. It is available
with optional tappings for a woodburning or solid fuel boiler. If any of the standard
tapping are not required, they can be removed at the time of order.
The Torrent ECO SOL provides high-performance mains pressure hot water.The
central heating circuit can be supplied directly from a sealed system boiler although
an auxiliary heating circuit can be connected from the store in which case both the
solar and solid fuel energy will also provide an input to the auxiliary heating circuit.
Alternatively, an open vented boiler can be used to directly heat the store so that
the energy will be available for both hot water and auxiliary central heating circuit.
The cylinder comes with two return connections for solid fuel and woodburning
stoves to enable the homeowner to have an aga running 24 hours a day but still
retaining the dedicated solar volume.
An immersion boss is provided for a site fitted immersion heater, and it is normally
envisaged that this will be used as an emergency electric back-up for hot water and
to provide emergency energy to the auxiliary heating circuit.
The Torrent ECO SOL is designed to be heated
by one or more of the following heat sources;
• Directly by an electric immersion heater as
a backup heat source only
• Either indirectly or directly by a remote gas
or oil boiler
• Directly by a solid fuel boiler or stove
• Indirectly by solar thermal system
Torrent ECO HP Models
The Torrent ECO HP and HP SOL are directly
heated, open vented thermal stores designed
for use with an air source or a ground source
heat pump. It is available with optional tappings
for a woodburning or solid fuel boiler. If any of
the standard tapping are not required, they can
be removed at the time of order.
Although the thermal store is open vented,
the mains pressure hot water is heated
instantaneously via the plate heat exchanger.
The Torrent ECO HP range of primary thermal
stores are only suitable for open vented heating
systems but they provide mains pressure hot
water without the requirements of a pressure
and temperature relief valve.
An immersion boss is provided for a site fitted
immersion heater, and it is normally envisaged
that this will be used as an emergency
electric back-up for hot water and to provide
emergency energy to the auxiliary heating
circuit.
The suggested model sizes are based on typical
hot water usage and the store charged to about
75°C. If the store charge temperature is going
to be lower, then a larger model should be
considered. This is especially important where
the heat pump alone is unable to charge the
store to 75°C as is likely to be the case with a
heat pump. If the immersion element is used
to raise the temperature of the store, then
a suitable control system should be used
to ensure the immersion element does not
operate until the heat pump has raised the store
to the maximum temperature, or the overall
efficiency of the system will be reduced.
The Torrent ECO HP and HP SOL are designed
to be heated by one or more of the following
heat sources;
• Directly by a ground source or air source heat
pump
• Directly by an electric immersion heater as
a backup heat source only
• Directly by a solid fuel boiler or stove
• Indirectly by solar thermal system
