8.42 The Kennedy Town Incineration Plant was in continuous operation throughout the year. In an effort to improve refuse drying condition the burner of one unit was moved from the furnace back wall to the side wall. The limited success of this experiment intimated that there was no point in effecting similar modifications on the other unit. An additional maintenance damper was fitted to the hot gas duct making it possible, without closing down half the plant, to carry out refractory repairs in the hot gas duct whilst still operating 3 units. Due to the fact that the market for scrap metal in Hong Kong collapsed during the year large quantities of scrap arrived in the refuse, and after passing through the units damaged the submerged ash conveyors. There were 3 instances of L.P.G. bottles exploding in the units. Throughout the year the turbo-alternator operated satisfactorily taking the bulk of the electrical load. Approximately 210,000 tons of refuse was burnt during the year. 1,253 mechanical and 310 electrical repairs were carried out by Plant staff.
8.43 The Kennedy Town Abattoir functioned smoothly throughout the year but an ever increasing workload made maintenance schedules difficult to meet. All equipment was overhauled during the first two weeks of September 1971.
Air-Conditioning and Refrigeration Plants
8.44 These Sections maintain all air-conditioning plants including associated water pumps with chlorination equipment and refrigeration plants. At the end of the year, 44 major air-conditioning plants, totalling 5,230 tons of refrigeration, were in operation. In addition to plant operation, maintenance visits were paid to non-attended plants; these included 1,749 visits to minor air-conditioning plants, 225 visits to refrigeration plants, 1,130 visits to water pumps and 525 visits to chlorination equipment. 203 fault calls were attended.
City Hall
8.45 The City Hall Electrical and Mechanical Services Section maintains all the electrical, mechanical and air-conditioning installations at the City Hall, carrying out repairs of faults, replacement of lamps of all types, the installation of temporary wiring for flood/display light-fittings and the operation of the 700 tons of refrigeration air-conditioning plant as well as 21 zone cabinets. Operators were provided for the stage lighting of 1,167 performances and rehearsals,
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