Heating and ventilating buildings : a manual for heating engineers and architects . aseous bodycauses a change in volume, which in some instances has beenutilized to move the heat-regulating valves so as to maintaina constant temperature. Fig. 268 represents a regulator inwhich the expansion or contraction of a body of confined air isutilized to control the motion of the dampers to a hot-waterheater. It consists of a vessel containing in its lower portion ajacketed chamber connected to the hot-water heater at pointsof different elevation so as to secure a circulation from theheater through the
Heating and ventilating buildings : a manual for heating engineers and architects . aseous bodycauses a change in volume, which in some instances has beenutilized to move the heat-regulating valves so as to maintaina constant temperature. Fig. 268 represents a regulator inwhich the expansion or contraction of a body of confined air isutilized to control the motion of the dampers to a hot-waterheater. It consists of a vessel containing in its lower portion ajacketed chamber connected to the hot-water heater at pointsof different elevation so as to secure a circulation from theheater through the lower portion or jacket of the vessel from2 to 3. Above this is a second chamber which is covered ontop with a rubber diaphragm, and which contains a funnel-shaped corrugated brass cup. The opening to the cup is in 4i8 HEATING AND VENTILATING BUILDINGS. the lower portion of the chamber, the top and larger surfaceresting against the rubber diaphragm. Enough water atatmospheric pressure or alcohol is poured into the upperchamber through the opening marked I to seal the orifice in. Fig. 26S.—Lawler Hot-water Damper-regulator. the inverted cup and confine the air it contains. The reg-ulator acts as follows: The warm water from the heater mov-ing through the lower chamber communicates heat to thewater or alcohol in the upper chamber, which in turn warmsthe air in the inverted cup, causing it to expand. This movesthe rubber diaphragm and connected levers leading to thedampers substantially as in the damper-regulator for steam-heaters, already described. The Powers regulator for hot-water heaters (see Fig. 269)is somewhat similar in construction to the one described, butacts on a different principle. A liquid which will vaporize at alower temperature than that of the water in the heater is placedin the vessel communicating with the diaphragm, in whichcase considerable pressure is generated before the water in theheater reaches the boiling-point. As the water in the heater isusually
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1910
