Envirosun Solar AS
Envirosun is Enviroheat’s sister brand in solar hot water heating.
Envirosun has been manufacturing solar hot water products in Australia for decades now and has evolved into a market leader in quality, performance and affordability. Envirosun have a solar hot water heater to suit a wide range environments and climates.
The Product
Envirosun AS split system solar water heaters are also available. They come in 3 different to suit most home sizes 250 litre, 315 and our largest is 400 litre, these are known as the Envirosun “AS” solar hot water systems
Active systems only require the solar collectors to be installed on the roof with the storage tank situated at ground level or any other convenient and out-of-the-way location. The operating principle of these systems is relatively simple – when the solar collectors are able to add heat into the storage tank, a small pump is switched on to circulate hot-water from the collectors and replace it with cool water from the tank. Once the tank is full of hot-water, the pump is switched off, but ready for the next cycle.
While pumped systems have been around for many years, modern electronics and materials have brought improvements in both function and reliability. Today’s Envirosun AS systems adopt many of these technological advances and blend them with our collector technology, to create our range of high-performance active solar hot water systems.
The Envirosun AS Range of solar hot water systems uses a small circulating pump and electronic microprocessor to transfer the heat absorbed by the solar collector to the separate storage tank. The microprocessor takes information from temperature sensors on the solar collectors and in the storage tank. When the collectors are 6°C hotter than the water in the storage tank, the circulating pump is operated. When the differential falls to 4°C or lower, the pump is not operated. The microprocessor also uses the sensor information to control a suite of over-temperature protection modes:
- if the water in the storage tank reaches 70°C, the pump is stopped
- if the collector temperature reaches 190°C, the pump is cycled on to control the temperature to below 185°C
- if the collector temperature reaches 200°C the pump is not operated
- if the tank temperature has risen above 70°C and the collectors are cooler the pump is run
