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Solar Heating - Advanced Solar Heating Systems in Suffolk, Cambridgeshire, Norfolk,
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Advanced Renewable Energy Solutions - solar heating, dual solar heating, solar home, solar water heating, solar system, solar collectors, solar power, solar energy, solar thermal







C - combi systems
Providing mains pressure hot water that integrates with your existing combi boiler.
The exact specification of the system will depend on wether your combi boiler can
except preheated water or not. This will be decided when your technical survey is
carried out. Most of the modern ones can.
If your combi boiler cannot except preheated water then we will install your system
with a 2 two port valve arrangement. What this means is that when your new un vented
solar cylinder comes up to temperature ie: 55°c then the valves will divert the supply
of your hot water from your combi boiler to your solar cylinder. The cylinders come
as standard with a mixing valve to ensure the temperature never exceeds a safe temperature
at your taps. Your boiler will not have to heat any water on demand at this time
as this hot water will at your taps will have come from your solar system.
If your combi boiler is heat sensing then we use a patented combi valve solution.
These operate in three ways:
- If your solar cylinder is at the target temperature of 55°c or above then the valves
will mix this down to the safe target temperature of 55°c and send this water directly
to your taps bypassing your combi boiler.
- If your solar cylinder is below the target temperature of 55°c but above the temperature
your combi boiler can safely accept as preheated water, typically 30°c then the valves
will mix this down to 30°c and feed it to your combi. Hence your combi boiler only
has to heat the water an additional 25°c to get to 55°c. And you boiler can do this
safely.
- If your solar cylinder is below the temperature your combi boiler can safely accept
as preheated water then the valves allow the preheated mains water directly to your
combi boiler. Any amount of preheat in the water reduced the load on your boiler.
As your combi boiler operates on mains pressure water we need to install an un vented
cylinder. All solaressence® un vented cylinders are stainless steel and come with
a 25 year warranty. An additional benefit of installing a solaressence® cylinder
is that it each cylinder is custom-made for your home so can be manufactured to fit
snugly into the correct space. These cylinders are also much more highly insulated
so you lose less energy with the heat escaping. It must be noted that there must
be some where in your home to house the cylinder, an old airing cupboard, garage
or loft space.
Substantial savings on your hot water costs can be made because the energy you receive
from the solar system into your hot water supply displaces the energy your boiler
would otherwise have had to produce. Plus you have the ability to upgrade at any
time in the future to a dual system should you install a new condensing or system
boiler.
how it works
The solar collectors u begin to rise in temperature. The temperature differential controller SE3 v monitors the difference between the collector and your new un vented { cylinder with highly accurate temperature sensors y . When the temperature of the collectors rises more then 6-8 degrees above that of the water cylinder the controller turns the solar pump w on. This creates circulation within the sealed solar circuit z which is made of pre-insulated stainless steel duo-flex pipe containing tyfocor (solar grade anti-freeze) heat transfer fluid. As you use hot water at your taps this is replaced as described above, this diagram show the combi valve solution. Your boiler x should still be on similar settings as before which according to your timing settings will boost the temperature of your hot water if required. The need for your boiler to boost the hot water will depend on the time of the year, the amount of solar availability, and your hot water needs. Sometimes it will need to boost, sometimes it will not. Again it must be remembered that if your boiler does need to boost the temperature, it is just that, a boost. The energy you receive at your taps from the solar system displaces the energy your boiler would otherwise have had to produce whether your boiler still has to fire up to boost or not.
This transfer of heat from the solar circuit to the cylinder has the effect of taking the heat out of the collectors u and their temperature drops again. When their temperature has dropped to only 2 degrees above the water cylinder the temperature differential controller SE3 v turns off your solar pump w. The whole process then simply starts again. So in essence the system transfers the heat from the collectors to your storage cylinder in many short bursts throughout the day.