HL 300 Central Heating System

1 mobile support, 2 boiler pedestal, 3 electric boiler, 4 plate heat exchanger, 5 expansion vessel, 6 thermometer, 7 tubular radiators, 8 flat radiators, 9 switch box with digital heating controller, 10 variable-area flow meter, 11 temperature sensor, 12 automatic bleed valve, 13 manometer, 14 circulating pump, 15 four-way mixer, 16 domestic water pump