gledhill Torrent GreenHeat TGH140-OV Design, Installation & Servicing Instructions page 5

arrangements 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 GreenHeat OV is designed to be heated directly (i.e. without internal heat
exchangers) by one or more of the following heat sources;
• Electric immersion heaters e.g. to utilise off peak electricity
• A remote gas or oil boiler
• A solid fuel boiler or stove
Torrent GreenHeat SP
The Torrent GreenHeat SP utilises a sealed system boiler as its primary energy source.
It comes fi tted with tappings for a woodburning or solid fuel boiler as standard,
but if not required, can be removed at the time of order. The Torrent GreenHeat SP
provides high-performance mains pressure hot water.
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 element is provided 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. However, if a low carbon or renewable electricity source
is available then this could be connected to the immersion element to provide heat
input to the thermal store, decreasing the use of the fossil fuel boiler and hence
reducing running costs.
The Torrent GreenHeat 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 GreenHeat SOL
The Torrent GreenHeat SOL utilises either a sealed system boiler and / or an open
vented boiler as its primary energy source. It also has a high-effi ciency solar coil to
allow the homeowner to benefi t from a wide variety of alternative energy inputs.
The cylinder comes fi tted with tappings for a woodburning or solid fuel boiler as
standard, but if not required, can be removed at the time of order.
The Torrent GreenHeat 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 element is provided 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. However, if a
low carbon or renewable electricity source is
available then this could be connected to the
immersion element to provide heat input to
the thermal store, decreasing the use of the
fossil fuel boiler and hence reducing running
costs.
The Torrent GreenHeat SOL is designed to be
heated by one or more of the following heat
sources;
• Directly by an electric immersion heater as
• Either indirectly or directly by a remote gas
• Directly by a solid fuel boiler or stove
• Indirectly by solar thermal system
Torrent GreenHeat HP Models
The Torrent GreenHeat 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 comes fi tted with tappings
for a woodburning or solid fuel boiler as
standard, but if not required, 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 GreenHeat 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.
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
effi ciency of the system will be reduced.
The Torrent GreenHeat HP and HP SOL is
designed to be heated by one or more of the
following heat sources;
• Directly by a ground source or air source heat
• Directly by an electric immersion heater as
• Directly by a solid fuel boiler or stove
• Indirectly by solar thermal system
Page 5
DESIGN
a backup heat source only
or oil boiler
pump
a backup heat source only
DESCRIPTION