Cyclopedia of heating, plumbing and sanitation; a complete reference work . Fig. 6. Boiler in Brick Setting. in the case of furnaces, has been quite generally discarded, exceptin cases where the space around and above the boiler is used as a cen- 229 STEAM AND HOT WATER FITTING tral heating chamber for indirect systems, the radiators being placed above the heater see Fig. 61. The pipes lead off as in furnace heating. The ash-pits under mosl boilers are rather shallow; therefore. Pit for Collection of Hot Ashes. it is a good plan to excavate and build a pit uot less than 1 to 6 inchesbelow the
Cyclopedia of heating, plumbing and sanitation; a complete reference work . Fig. 6. Boiler in Brick Setting. in the case of furnaces, has been quite generally discarded, exceptin cases where the space around and above the boiler is used as a cen- 229 STEAM AND HOT WATER FITTING tral heating chamber for indirect systems, the radiators being placed above the heater see Fig. 61. The pipes lead off as in furnace heating. The ash-pits under mosl boilers are rather shallow; therefore. Pit for Collection of Hot Ashes. it is a good plan to excavate and build a pit uot less than 1 to 6 inchesbelow the floor, to give additional .-pace for the collection of hot ashes,thus avoiding the burning-out of urates. Such pits should be built preferably of brick, and thebottom should be paved withIticks on edge, to preventtheir being easily 7 shows the general ar-rangement of an ash-pit builtas described. Boiler Connections. Smalljobs frequently have no stopvalves at the boiler. In thecase of larger ones, or wherethere are two boilers, valvesin the supply mains must al-ways be accompanied w i t hcheck valves in the returns;otherwise, in case a stop valvein the main steam line isclosed, the water will bebacked out of the main returnsat the boiler, by the pressure. Should the water partially leave theboiler in this manner and then suddenly return, the water coming incontact with the heated sections will crack them. A stop valve should be placed between the boiler a
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