Installation Instructions – RVR Solar Water Heating Kits - RVR.ie

Installation InstructionsSystem Schematics and CircuitsDetailed information on the design of solar systems is available in the RVR publication, Solar System DesignGuide. This may be downloaded from www.RVR.ie and should be read carefully before designing a system.The most common type of solar water heating system is a system which uses a twin coil water heater. A schematicfor this type of system is shown below.This type of system is suited to both new and retro-fit installations where the water heater is to be replaced. Atwin coil water heater is used as a thermal store, with the solar circuit connected to the lower coil. The tankused should be tall and narrow to ensure good stratification of the heated water. A boiler is usually connectedto the upper coil. In this type of system the solar system will be able to provide a large percentage of the domestichot water needs of the household. Systems are usually designed to provide about 60% of the annualamount of hot water needed.The most important components of a typical system are listed below:1. Solar Panels2. Solar Station3. Twin Coil Water Heater4. Mixing valve5. Expansion Vessel6. Solar FluidFig. 1 - Typical solar water heating system3