. Power, heating and ventilation ... a treatise for designing and constructing engineers, architects and students . ine in each by the useof a water-line trap discharging into a vented receiver located inthe boiler room. Sometimes the buildings can be grouped so that one v^ater-linetrap will care for several. Each building should be separatelyconnected with the mains, and provided with valves so it can be 280 HEATING AND VENTILATING PLANTS shut off in case of accident or repairs. An arrangement formaking the return connections without the use of a receiver isshown in Fig. 195. In this case all
. Power, heating and ventilation ... a treatise for designing and constructing engineers, architects and students . ine in each by the useof a water-line trap discharging into a vented receiver located inthe boiler room. Sometimes the buildings can be grouped so that one v^ater-linetrap will care for several. Each building should be separatelyconnected with the mains, and provided with valves so it can be 280 HEATING AND VENTILATING PLANTS shut off in case of accident or repairs. An arrangement formaking the return connections without the use of a receiver isshown in Fig. 195. In this case all traps discharge into a returnmain which is vented through the balance pipe of a pump regu-lator connected into the outboard exhaust. This method of making the return connections is only adaptedto cases where all of the returns are under practically the samepressure. Otherwise there will be danger of water hammer whentraps under a higher pressure discharge into the cooler water ofthe main return. When the different traps discharge into a ventedreceiver above the water line, all trouble of this kind is Fig. 195. Return Connections without Use of a Receiver. The exhaust from the laundry engine should be turned intothe drying coils, with a connection for admitting high-pressuresteam through a reducing valve, as may be necessary to makeup the full amount required. The trap on the return should bearrange so as to discharge either to the receiving tank or seweraccording as live or exhaust steam is used. Fig. 196 shows atypical arrangement for laundry piping. Temperature of Air.—In large buildings where the double-ductsystem is employed a certain proportion of the air is heated tothe maximum required to maintain the desired temperature inthe most exposed rooms, while the temperature of the otherrooms is regulated by mixing with the hot air a sufficient volumeof cool or tempered air at the bases of the different flues. Thisresult is best accomplished by designing a hot-blas
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectventilation, bookyear
