Cyclopedia of heating, plumbing and sanitation; a complete reference work . e tank, cold water from 78 HEATING AND VENTILATION 69 the bottom flows into the sewer, and the -train is carried off throughthe vapor pipe. The equalizing pipe is to prevent any siphon action which might draw the water out of the tank after a flow is once only a part of the water is blown out of a boiler at one time, theblow-off tank can be of a comparatively -mall size. A tank 24 by 4sinches should be large enough for boilers up to 4s inches in diameter; Cf= PROM BO/LER EQUAL/ZfMG* PIPE WATER LINE r^r V Q Q
Cyclopedia of heating, plumbing and sanitation; a complete reference work . e tank, cold water from 78 HEATING AND VENTILATION 69 the bottom flows into the sewer, and the -train is carried off throughthe vapor pipe. The equalizing pipe is to prevent any siphon action which might draw the water out of the tank after a flow is once only a part of the water is blown out of a boiler at one time, theblow-off tank can be of a comparatively -mall size. A tank 24 by 4sinches should be large enough for boilers up to 4s inches in diameter; Cf= PROM BO/LER EQUAL/ZfMG* PIPE WATER LINE r^r V Q Q TO SEWER -. 49. Connections of IJlow-Off Tank. and one 36 by 72 inches should care for a boiler 72 inches in smaller quantities of water are blown off at one time, smaller tankscan be used. The sizes given above are sufficient For batteries of 2 ormore boilers, as one boiler can be blown off and the water allowed tocool before a second one is blown off. Cast-iron tanks are oftenused in place of wrought-iron, and these may be .^unk in the groundif desired. 79. Cast Iron Seamless Tubular Steam Heater HEATING AND VENTILATION PART II INDIRECT STEAM HEATING As already stated, in the indirect method of steam heating, aspecial form of heater is placed beneath the floor, and encased mgalvanized iron or in brickwork. A cold-air box is connected withthe space beneath the heater; and warm-air pipes at the top areconnected with registers in the floors or walls as already described forfurnaces. A separate heater may be provided for each register if therooms are large, or two or more registers may be connected with thesame heater if the horizontal runs of pipe are short. Fig. 50 showsa section through a heater arranged for introducing hot air into aroom through a floor register; and Fig. 51 shows the same type ofheater connected with a wall register. The cold-air box is seen atthe bottom of the casing; and the air, in passing through the spacesbetween the sections of the heater,
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