Crown Boiler AWI128 - Manual (Page 17)

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FIGURE 13: BOILER BYPASS PIPING
FIGURE 14: ISOLATION OF BOILER FROM SYSTEM
WITH A HEAT EXCHANGER
Figure 15. Use isolation valves to prevent chilled water from entering the boiler.
6) Air Handlers - Where the boiler is connected to air handlers through which refrigerated air passes, use flow control valves
in the boiler piping or other automatic means to prevent gravity circulation during the cooling cycle.
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