Twin Coil Unvented Solar System
This system works with any conventional boiler, replacing a standard hot water cylinder with our twin coil unvented cylinder.
The Unvented or Pressurised Water Cylinders – which are not open to the atmosphere and rely on the incoming mains water pressure to work correctly. The water is heated by either a coil/heat exchanger from the heating system or by an immersion heater. The size of these cylinders depends on the number of people living in the property, ranging in domestic housing from 130 litres to 300 litres.
Unvented Cylinder
- Pressure Vessel
- Expansion Relief Valve
- Cold Water Inlet
- Temporary Relief Valve
- Hot Water Outlet
- Immersion Heater
- Tundish or Visual Overflow
- Non-Return Valve
- Cold Water to Taps
- Pressure Limiter
- Strainer
- Stopcock
- Mains
- Discharge Pipe
Solarbase Twin Coil Cylinders
Solar cylinders differ from conventional cylinders in that they are normally larger and have two coils with two sensor pockets. The uppermost coil is used by your standard heating system as a backup for the solar heater, while the solar circuit uses the lower coil and heats the rest of the cylinder using the rising hot water in the cylinder.
Key safety features:
- Safety by professional design and installation; the design and sizing of your system are vital to insure safe operation.
- The evacuated tubes are inherently safe as the solar energy stops getting collected when the tube temperature reaches 85°. This is achieved by using state-of-the-art self-limiting intelligent metal technology.
- Modern self-modulating electronic controller using Plug and Play technology.
- 3 bar Pressure Relief Valve.
- 18-24 litre Expansion Vessel — This vessel is used to accommodate the increased water volume when the system is working.
- All safety components have been tried and tested by the solar industry for over 25 years and have a proven tack record for their performance and reliability.