【Daily Question】Utilities - Water Supply and Drainage - 20200414

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Which of the following statements regarding the water heaters in a hospital’s hot water supply system does not conform to the current \"Code for Design of Building Water Supply and Drainage Systems\"? A. There must be no fewer than 2 water heaters. B. Volume-type water heaters with water retention areas shall not be used. C. In large and medium-sized hospitals, when one water heater is under maintenance, the total heating capacity of the remaining water heaters shall be no more than 70% of the designed hourly heat consumption. D. In small hospitals with 50 beds or fewer, each water heater can have a heating capacity equal to 100% of the designed hourly heat consumption. Answer: C. Option A complies with Article 5.4.3 of the current Code for Design of Building Water Supply and Drainage Systems; to ensure that hospital operating rooms, delivery rooms, etc. always have access to the hot water they need, there must be no fewer than 2 water heaters in such hospitals. Option B complies with the provisions of Article 5.4.3 of the current Code for Design of Building Water Supply and Drainage Systems. Hospitals are the most suitable places for various pathogenic bacteria to grow and multiply. In volumetric water heaters that have water retention areas, the temperature of the water in these areas is generally between 20 and 30°C, which constitutes an ideal environment for bacterial growth. To prevent the proliferation of bacteria from posing a threat to human life, hospitals should not use volumetric water heaters with water retention areas. Option D complies with the provisions in the explanatory notes of Article 5.4.3 of the current Code for Design of Building Water Supply and Drainage. Option C does not comply with the provisions of Article 5.4.3 of the current Code for Design of Building Water Supply and Drainage Systems. When one water heater is under maintenance, the total heating capacity of the remaining heaters must be no less than 50% of the designed hourly heat demand