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30 UNT-IOM-6
securely set the open memory position. The memory stop indicates
the last set open position.
7. If using a 3-way valve: close the control valve to the coil, with the
differential pressure meter still
connected. This will divert flow to
the bypass side of a 3-way valve.
Adjust the balancing fitting to
obtain the same pressure drop
across the circuit setter valve as
in step 2 when the control valve
was open to the coil.
Figure 18. Close-up view of
manual circuit setter valve.
Figure 19. Setting the manual circuit setter valve, differential
pressure vs. flow.