Bell & Gossett P2001489 Integrated Technologic with Sensorless Control - Manual (Page 38)

Setup 3 Setup 4
Sensorless Pressure
Control
Sensorless Flow Control
Parameter Number Parameter Name Default Value for Set-up 3 Default Value for Set-up 4 Parameter Description
20-93 PID Prop Gain 5 5 Proportional correction
gain for PID controller.
Increasing this value will
produce a faster system
response. CAUTION:
Increasing this value too
high can make the system
unstable and produce
severe oscillations.
20-94 PID Integration Time 3.3 s 3.3 s Integration time for the PID
controller. Increasing this
value will produce a slower
system response.
CAUTION: Decreasing this
value too low can make the
system unstable and
produce severe oscillations.
22-80 Flow Compensation Disabled Disabled Enables or disables flow
compensation (head loss
compensation) function.
22-81 Square-Linear Curve
Approx.
100% 100% Adjusts shape of the flow
compensation control
curve.
22-84 Speed at No Flow [Hz] NA 0.0 Hz Speed required to maintain
the minimum head at no
flow. Use this parameter
when flow compensation is
enabled. See figure 3,
point A.
22-86 Speed at Design Point [Hz] NA 60.0 Hz Speed required to maintain
the design point. Use this
parameter when flow
compensation is enabled.
See figure 3, point B.
22-87 Pressure at No Flow Speed 0.000 0.000 Pressure developed at no
flow speed. Use this
parameter when flow
compensation is enabled.
See figure 2, point A.
22-89 Flow at Design Point 0.000 NA System flow at the setpoint
and rated speed. Use this
parameter when flow
compensation is enabled.
See figure 2, point B.
5-10 Terminal 18 Digital Input Start Start DI 18 function
5-11 Terminal 19 Digital Input No Function No Function DI 19 function
5-12 Terminal 27 Digital Input No Function No Function DI 27 function
6-50 Terminal 42 Output Speed 4-20mA Speed 4-20mA Analog output function
5-40 Function Relay Relay 1: No Alarm Relay 2:
Running
Relay 1: No Alarm Relay 2:
Running
Relay 1 and 2 function. See
note below on how to
program this parameter.
System Setup and Operation
36 Integrated Technologic ® with Sensorless Control INSTRUCTION MANUAL