Page 13
Torrent HP Models
A typical wiring arrangement for a system in which the space heating is supplied from
a Torrent HP (fi gures 7 and 9), is shown in fi gure 10 and a typical wiring arrangement
for a system in which the space heating is supplied from a heat pump circuit (fi gures
6 and 8), is shown in fi gure 11.
In fi gure 10, the control of heat pump is shown with top and bottom thermostats to
enhance the performance of the heat pump by decreasing the frequency of cycling. The
heat pump is switched on when both top and bottom thermostats are calling for heat and
is switched off when both thermostats stop calling for heat. A two channel programmer
suitable for gravity hot water system should be used with this arrangement.
In fi gure 11, the generic wiring arrangement is shown with a 3-port diverter valve
with hot water priority. If a 3-port fl ow share valve is used, then the controls should be
wired to provide priority for hot water because the space heating and the hot water
heating may be operating at different fl ow temperatures.
Torrent HP-Solar Models
The heat pump and space heating system confi gurations and operation with the Torrent
HP-solar models is the same as for standard models. The solar thermal system operates
independent of the heat pump system. A typical generic solar system confi guration
is shown in fi gures 8, 9 and 12 for guidance only. The solar system and the associated
controls should be planned and installed following manufacturers instructions.
All components in the solar primary system must be marked or identifi able in such a
way that their design pressure and temperature can be readily determined.
A safety device i.e. pressure relief valve to control the risk of over-pressure in the
system components should be fi tted as per solar system manufacturers instructions.
A termination from the pressure relief valve should minimise the risk of damage to
persons or materials. Suitable locations are a high temperature receptacle, internal
gully or else externally at ground level. High level termination from a wall or on a roof
could cause injury to people or animals below if the valve were to release scalding
water and steam.
The pipe leading to from the safety device to the collector should be rigid and non-
deformable construction, without any possibility of restriction, distortion or closure
by any other fi tted component.
A typical wiring diagram for the solar thermal system for the Torrent HP-solar is shown
in fi gure 11. It is advisable that an overheat thermostat is fi tted to limit the store
temperature exceeding 85°C from solar gains during stagnant conditions.
Wood Burning Stove
Certain models of the Torrent HP and Torrent HP-solar have provision for connecting
other alternative energy sources such as AGA or wood burning stove in conjunction with
a heat leak radiator system. Although the thermal store is open vented and inherently safe,
a heat leak system must be provided to prevent the possibility of boiling temperatures
being reached. This is normally achieved by providing a suitable pipe thermostat on the
alternative energy source fl ow pipe which is set to approximately 85-90°C and wired so
that when this temperature is reached, the heating pump and/or zone valve will operate
to allow excess heat to be dissipated through the heat leak circuit.
Alternative energy source should be installed and piped so that it conforms to the
manufacturers instructions.
INST
ALL
A
TION
INSTALLATION
Summary of Contents for THP180 sol
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