RVR Solar Water Heater - RVR.ie

RVR Solar Water Heater InstructionsPrinciple of operation of the small tank.When the solar water heater is installed, the incoming cold water fills the small tank first. Thewater flows from the small tank into the large tank and finally into the vacuum tubes. When thelarge tank is full of water, the ball-cock in the small tank closes and prevents further water fromentering.The water in the tank and vacuum tubes expands when it is heated and the small tank acts as anexpansion vessel to absorb the increased volume of the heated water.If there is any loss of water from the tank or vacuum tube through evaporation or leakage, thewater will be replenished by the small tank automatically. The small tank is used to maintain thelevel of water in the water heater automatically.Fig. 4 - Diagram of vacuum tubes and tank on bracketFig. 5— Structure of the tank4