Principles of Operation

• The system is managed by the control center, which includes a light sensor fitted inside the solar collector.
• When there is sufficient daylight water is pumped from a storage vessel and flows through micro-bore copper piping fitted beneath the solar collector.
• The water flowing through the copper piping collects the heat, and transfers it to the cylinder via a solar coil. Hot water is then ready upon demand.
• When insufficient solar hot water is produced the auxiliary fuel supply (e.g. gas-fired boiler) will fire and feed top-up heat into the hot water cylinder.
• With a combi boiler, pre heated solar water is supplied from the cylinder and fed top up heat by the combi if necessary.
• The pump unit will switch off at the end of the day, or when the hot water in the cylinder reaches the maximum temperature.
• All the water is drained-back out of the system into a storage vessel to guarantee boil and freeze protection.
• There is a two-minute time delay fitted to the pump to allow for dark clouds moving overhead.