gledhill TEC140-OV Installation & Servicing Instructions Manual page 25

For maximising the use of the renewable 'green' energy, the system should be managed
and controlled so that unnecessary firing of the boiler is kept to a minimum. This can be
achieved by a combination of householder use of the system and controls, for example;
Use the store to provide shower or a bath to utilise the heat gained by the system
from the previous day's solar energy input. Alternatively showering or bathing in the
evening will utilise the energy that has been stored during the day from the solar
system.
• As with any system, hot water and space heating should be programmed according
to house holder requirements. However it is always good to remember that to gain
maximum advantage from the solar panels, the store should be as cool as possible,
prior to expected periods of high solar gain. To achieve this in spring, summer and
autumn, the hot water channel of the boiler should be programmed to come on 30
minutes before the hot water is required in the morning and then programmed off
before volumes of water are drawn off the system. This way the store is depleted
of heat allowing maximum transfer from the solar system during the day.
• However further supplementary time periods for the boiler will be required in
winter when not much solar energy is available.
• Uncontrolled boiler operation can also be reduced by fitting and wiring a pipe
thermostat on the solar return pipe close to the Torrent SOL.
As part of setup and commissioning, it is important that this boiler hold-off pipe
thermostat be adjusted to find the best setting for each individual installation.
Failure to do so will give under performance of either the boiler or the solar heating
system.
A solid fuel boiler can also be connected to the Torrent ECO SOL, please refer to page
20 for further information.
Domestic overheat protection
To comply with building regulations the solar overheat thermostat should be set at
a temperature which prevents the contents of the thermal store exceeding 100°C.
The DHW production board does not incorporate an overheat functionality linked
to the primary store temperature which prevents it from running when this exceeds
80°C. The DHW temperature and flow rate are measured accurately and virtually
instantaneously by the HUBA flow sensor. The software algorithm is therefore enabled
to react virtually instantaneously to raised DHW temperatures.
The PWM pump flow rate will be reducing as the DHW temperature rises above 60°C
and fully stopped if the sensed DHW reaches 80°C. Thereby, the Torrent Eco DHW
production is limited to 80°C in normal operating conditions, and does not need an
inline hot water tempering valve to limit the domestic hot water system to 60°C (see
part G para 3.64). However, this does not remove the obligation on the installer to
observe building regulations and water supply regulations recommendations.
In any installation, the hot water supply to a bath should be limited to 48°C by the use of
an inline blending valve (see part G para 3.65). In addition, the Water supply regulations
1999 (WRAS) recommends thermostatically controlled mixers should be used in all
installations, particularly where children in schools or aged or disabled people are
using showers in public buildings and are unsupervised. (see R18.5 section 8 page 9).
INSTALLATION
Page 25
TORRENT ECO SOL