Page 29
SOL
AR HEA
TING SY
STEM
HEATING SYSTEM DESIGN
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 RE-solar as shown in figures in
section 5
‘Installation’
.
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.
(g)
All models of Torrent RE-solar with the exception of the 210 DE-RE are supplied with two
additional connections for the supplementary under-floor heating circuit as shown in
figures 4.8 and 4.9. It is important to remember that the hot water will be immediately
available from the thermal store and its temperature could be as high as 85
o
C. Therefore
suitable blending valve and pumping station must be used to protect the under-floor
heating circuit from high temperature water. The additional underfloor tappings can be
requested on all other models.
4.5.4 OTHER RENEWABLE ENERGY SOURCES – TORRENT RE-SOLAR
The Torrent RE-solar models have provision for connecting other alternative energy
systems such as an Aga or wood burning stove in conjunction with the heat leak radiator
system as shown in figure 4.10.
Although the thermal store is open vented (even when used with a sealed heating system)
and therefore inherently safe, a heat leak system must be provided to prevent the
possibility of boiling temperatures being reached in the thermal store. This is normally
achieved by providing a suitable pipe thermostat on the alternative energy heat source
flow pipe which is set at approximately 85 – 90
o
C and wired so that when this temperature
is reached, the heating pump/zone valve will operate to allow excess heat to be dissipated
via the heat leakage radiator circuit. Alternatively a second thermostat can be provided in
the thermal store to activate the pump but this must be ordered with the store.
Summary of Contents for TORRENT COMBI-PREHEAT
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