Figure 34 CXhydraulic separation
The CX internal space heating pump can be hydraulically separated from the distribution
pump by (A) closely-spaced tees, or by (B) a low-loss header, as shown in the figure above.
Although best practice is to use primary/secondary piping, in a few cases (C) the internal
pump will be adequate to provide flow through the building's heat emitters. Ensure that the
internal pump is powerful enough for system distribution. Avoid (D), where an external pump
is placed in series with the internal pump.
The boilers can supply multiple heating loads with compatible supply temperature
requirements. Always ensure that loads sensitive to high temperatures are protected using
means such as mixing valves.
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