ITT PumpSmart PS220, Configuration And Operation Manual

Page: 122 / 300

PS220 Configuration & Operation Guide
121 PS220
Function & F
eatures
Advanced Pressure Control (System Curve Compensation)
The PumpSmart PS220 can be configured to automatically increase the systems operating pressure setpoint when an
increase in the demand for more flow is required. This feature compensates for additional frictional losses associated
with the higher flows and will set the new systems operating setpoint to a higher system matched value automatically.
This new value is the difference between the original setpoint and the setpoint that could be achieved in the system
at the pumps maximum speed. This is called PRESS INC %. The primary pressure setpoint will be maintained until the
pump speed continues to increase to preset speed value. This Speed Value is “PRESS INCR SPEED”. When the demand
increases, the pump speed will gradually increase to this value, and once this speed is reached, the PS220 will raise the
setpoint to the new systems compensated higher value based on the maximum speed of the pump.
The rate of increasing pressure is determined by the PRESS INC % which is the increase in the pressure setpoint at
maximum speed (parameter 30.12).
The Formula for this is: (Pressure Increase Max)/ (Pressure Setpoint)=Press Inc %
Note: This is only available in single pump operation.
EXAMPLE - If the setpoint of this system is 15psi [34.65ft @ 1.0 SG] and the system resistance
increases 10psig at the maximum flow rate, or roughly 67% of the set-point (10/15=.67), parameter
75.23 would be set as 67%.
Parameter Name Value/Range Notes
75.22 PRESS INCR SPEED 0-3600 RPM
1200 RPM [default]
This is the speed at which system curve compensation
begins. At speeds below this, no compensation for
increased resistance is made.
75.23 PRESS INCR % 0-100%
0% [default]
This is the amount that PumpSmart will have increased
the set-point at maximum speed.