TECO-Westinghouse F510 Series, Instruction Manual

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adjust the range of water pressure detection (23-24) to avoid the occurrence of severe flutter.
Mild water consumption result in pressure reducing during deceleration and the inverter’s output frequency
may decrease to sleep frequency. But if pressure feedback value is lower than that of target pressure
value (23-02) - range of water pressure detection (23-24), the output frequency will accelerate again.
Table 4.4.18 Guide for comparison of water pressure detection direction
Pros Cons
Upward
detection of
water
pressure
 Keep the pressure above the
target pressure during this
process.
 For strict and precise applications

If “Pump lift” is too high, operation
frequency is higher without water
consumption or with mild water
consumption. So this detection effect is too
restricted to jump into sleep.
 Energy-saving of water flow is not obvious
and Slave is not easy to sleep under the
multiple pumps in parallel.
Downward
detection of
water
pressure
 Jump into sleep status without
water consumption or with mild
water consumption.
 For energy-saving purpose, under
the multiple pumps in parallel
regulate the pumps to the
optimum operation state during
this process.
 Startup sequency is by Master,
Slave 1, Slave 2, and Slave 3.
Sleep sequency is by Slave 1,
Slave 2, and Slave 3 and Master.
After the switching time is
allowable, alternate Master and
Slave reach the average of life
expectancy.
 Pressure fluctuations may occur during this
process if user inappropriately regulates
the range of water pressure detection
(23-24) and the deceleration time of water
pressure detection (23-27).
23- 28
* Foreced Run Command
Range
【
0.00 ~ 599 .00
】
Hz
*: (When the motor’s maximum output frequency is over than 300Hz, the frequency resolution is
0.1Hz.)
This function is enabled when PID mode (10-03) is selected.
Pump will not depend on the feedback to make any PID output adjustment and runs the frequency of
00-05 (Frequency command) when multi-function digital input (S1~S6) is set to 16 (PID control disable).
And when the other digital input is set to 57(forced frequency run), inverter sets the frequency to run
depending on the parameter 23-28 (forced run command). If PID function disable is removed, the inverter
is controlled by PID.
Forced run command is applied to the situation when pressure sensor disconnects, control inverter output
via the external pressure sensor (ex. differential pressure switch).
23-29 Switching Time of Multiple Pumps in Parallel
Range
【
0 ~ 240
】
hour/min
23-72
Switching Time of Alternation in Parallel
Range
【
0
】
: Hour
【
1
】
: Minute