Doc. MI004620-I
S6001 Pump controller
Rev. 0
www.seneca.it
94 /
122
ALL RIGHTS RESERVED. NO PART OF THIS PUBLICATION CAN
BE REPRODUCED WITHOUT PREVIOUS AUTHORIZATION.
User Manual
2
3
1
Fig. 81 Trend example
i
nterval
“1”
In this interval the system starts from the initial condition where a pump is already operating, pump 1 in this case.
When the second pump is required, represented by the step variation of the PUMP ACTIVE signal, the CO speed
command signal of variable speed pump 1 is immediately brought to the technical minimum to try to minimize the
system disruption due to the addition of the new pump.
i
nterval
“2”
In this interval the PV pressure measurement signal is lowered due to the variation in the load connected to the
pump unit. The system reacts by increasing the CO speed control signal of the variable speed pump up to the
maximum value of 100% (= 50 Hz).
In this condition:
PV < SP;
CO = 100%;
the start separation time
(Fig. 61 on page 74 )
set in the “Pump parameters” screen in
“Pump
parameters” screen on page 74”
has elapsed.
The system controls the switching on of the next pump and the reduction in the CO signal to the technical minimum
is similar to that which occurs in interval 1.
i
nterval
“3”
In this interval the behaviour is similar to interval 2, which involves switching on the last available pump, pump 4.
The PUMP ACTIVE signal reaches the maximum value possible in the upper part of the trend graph and the CO
signal settles around 53%, bringing the pumps in balance with the load at the set operating pressure as SP = 3.00
bar.
Summary of Contents for S6001
Page 1: ...ORIGINAL INSTRUCTIONS USER MANUAL S6001 Pump controller...
Page 2: ......
