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THIS, PIPING
COMMON
tS INCORRECT
MISTAKES
TO SHOW
©
L
12. The near boilerpipingshall includea 1 1/2"ballvalvein thereturn
pipingasshowninFigure8Afarbottomblowdawnanddraining.
13. Forgravityreturnsystems,thebottomoftheloweststeamcarrying
pipe,beita dryreturn,ortheendofthesteammain,mustbeatleast
28"abovethenormalwaterlevellineanthedghtsideoftheboiler.
Thisisknownas"DimensionA."
14. Forpumpedreturnsystems,followthecondensatepumporbailerfeed
pumpmanufacturer'sinstructionsforproperinstallationandhookup.
15. Inconnectingthecoldwarer supplytothewaterinletvalve,makesure
thata deanwatersupplyisavailable.Whenthewatersupplyisfroma
wellor pump,asandstrainershouldbeinstalledatthepump.
FORUSEWITHCOOLINGUNITS
A.
This boiler, when used in connection with chilledwater systems,must
be installedso that the chilledwater is piped in parallel with the heating
boiler. Appropriate valves must be used to prevent the chilled water
from enteringthe heating boiler(Fig. g).
B.Whenthis boileris connectedto heatingcoilslocatedin air handlingunit.,
wherethey may be exposedto refrigeratedair circulation,the piping
systemshall be equippedwith flow controlvalvesor other automatic
meansto preventgravitycirculationoftheboilerwaterduringthecoolinc
cycle.
'_rd,.vE8 A & m
VALVESC & Q
_R _OUNG
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