Primary pump or boiler circulator.
Closely-spaced tees to or from load 1.
Closely-spaced tees to or from load 2.
Fill station with isolation valve closed, or fill tank.
Dirt separator recommended.
Figure 29 Boiler trim options - single boiler
Closely-spaced tees: To avoid induced flow, install each set of tees with straight piping
a minimum of 8 pipe diameters upstream and 4 pipe diameters downstream. Avoid using
elbow or other component that may create turbulent flow. Position tees as close together
as possible (maximum 4 pipe diameters apart) and ensure that there are no restrictions
between the fittings that would result in a pressure drop.
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