Combination heater for domestic and central heating water - has hot water tank with heat exchanger coil and central gas flue containing smaller series coil together with valves and pump

摘要

The heater hot water reservoir (9), has supply and return heating installation pipes. Burnt gases are channelled (4) through the reservoir, which also contains a heat exchanger serpentine coil (10) for domestic water. Another heat exchanger (11), in series with the serpentine, is installed in the burnt gas channel. A water supply valve, three way distributor and diverter, connect to the cold water. The diverter pipe (24) from the heat exchangers, may supply a circulation pump (25), connected to a distributor (30). Other diverters and electric valves (31) may connect the cold water pipe (21) to the supply valve (32). ADVANTAGE - Increased performance, compared with others, due to heat exchanger coil in the gas flue and also in the main tank.