Xylem IM167 R8 Aquavar CPC (Centrifugal Pump Control) - Manual (Page 92)

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MultiPump – Constant Pressure Control
12. Use the down arrow to highlight 1503 “TRANSDUCER MIN” 0.0 , then press EDIT. Default
should be 0 psi. Press CANCEL to advance to the next step. If this group needs to be
changed based on another type of transducer value, press SAVE to store.
13. Use the down arrow to highlight 1506 “SENSOR MIN”,
then press EDIT. Use the up arrow until the “TUNE” value is
displayed, press the SAVE key. This provides the transducer
a tuned value of 0 (ZERO) psi. NOTE: Make sure that your
transducer is wired to the Aquavar but free from any
pressure in the system. The transducer must be exposed
to 0 psi when this step is performed. Press the SAVE key to
tune your transducer.
14. Once you have saved the parameter 1506, press the EXIT
key. Use down arrow until you highlight parameter Group 22
“MULTIPUMP CTRL” Then press the SEL key.
15. After above step, you should have parameter 2201 “VALUE
DECREASE” highlighted. Press the EDIT once. Uses the
up or down arrow to select the allowable pressure drop
before the next lag pump comes on. (Example: If the first
pump reaches maximum frequency, and the pressure drop
allowed before the lag pump turns on is 3 psi, you would
set this parameter for 3.0 psi). Once a pressure is set in
2201, then press the SAVE key.
16. Use the down arrow to highlight parameter 2202 ”VALUE
INCREASE” then press EDIT. Use the UP or DOWN arrow to
set your system pressure curve compensation. If you do not
require friction loss compensation at maximum frequency,
then enter 0 psi. Then press the SAVE key. (NOTE: System
friction loss or overcoming head loss, can be compensated
by setting this parameter for each pump. This value increase
is additive for each lag pump)
.
17. Once parameter 2202 has been saved, use the DOWN
arrow to highlight parameter 2203 “ENABLE SEQUENCE”
then press the EDIT key. Using the up or down arrows
select the frequency in HZ that will turn the next lag pump
on, when the lead pump has reached this frequency.
Normal setting is 59 HZ, which allows the lag pump to start
when the frequency has reached 59HZ on the lead pump, plus value decrease has been
met). NOTE: Always set this parameter at or BELOW the MAXIMUM FREQUENCY). If
no changes from default are required, press the CANCEL key.
EXIT EDIT
REM PARAMETERS
1504 SENSOR
1505 K-DP FLOW METER
1506 SENSOR MIN
4mA
EXIT SEL
REM PAR GROUPS 22
16 REFERENCE SELECT
18 RELAY OUTPUTS
19 ANALOG OUTPUTS
21 REGULATE
22 MULTIPUMP CTRL
EXIT EDIT
REM PARAMETERS
2201 VALUE DECREASE
3.0 PSI
2202 VALUE INCREASE
2203 ENABLE SEQUENCE
2204 SWITCH LEAD/LAG
PROGRAMMING
EXIT EDIT
REM PARAMETERS
2201 VALUE DECREASE
2202 VALUE INCREASE
5.0 PSI
2203 ENABLE SEQUENCE
2204 SWITCH LEAD/LAG
EXIT EDIT
REM PARAMETERS
2201 VALUE DECREASE
2202 VALUE INCREASE
2203 ENABLE SEQUENCE
59.00 HZ
2204 SWITCH LEAD/LAG