SECTION 3
Pump Control
The following main parameters set up a Pump Control application.
No
9.0 Edit
Pump No
Pr.9.1
PumpSequence Pump Sequence (D = Alternate pumps1&2)
In order to even out the wear of pumps it is possible to alternate the sequence in
which pumps are used.
Select the sequence from the following list.
Options displayed
Description
9.1.1 Off Sequence by set points (i.e. no alternation).
9.1.2 Alternate pumps 1 & 2 Alternate Relay 1 and Relay 2 (1-2 / 2-1 etc.)
9.1.3 Alternate pumps 1,2 & 3 Alternate Relay 1, Relay 2 and Relay 3
(1,2,3 / 2,3,1 / 3,1,2 etc.)
NOTE: When using Pr.9.1 with Pr.9.2 set to 9.2.2 or 9.2.3: -
1. All switch-off points should be set at the same level
2. Do not include alarm
function relays in duty/standby routines.
Pr. 9.2 Duty Standby (D = Duty Assist)
Duty assist
is where pumps are switched on by set point, and kept on to assist earlier
pumps. Duty standby
is where only one of the pumps specified for duty can be on at a
time, i.e. when the set point for the second pump is reached and it switches on, the
first pump will switch off.
Select the duty sequence from the following list.
Options displayed
Description
9.2.1 Duty Assist Duty/assist operation
9.2.2 Duty Standby 1 & 2 Duty/standby on pumps 1 and 2
9.2.3 Duty Standby 1,2 & 3 Duty/standby on pumps 1, 2 and 3
The turn-off points for the pumps can all be the same, or they can be different
depending on the chosen "Set" and "Reset" values for each relay – unless using
alternating sequence at Pr.9.1.
9.1 PumpSequence
&2 )(Alternate 1
9.2 Duty Standby
(Duty Assist)
9.3 Exerciser
(0000)
9.4 Tolerance
(No Tolerance)
9.5 Maintenance
(All pumps in)
9.6 RunOnIntervl
(0.00)
9.7 Run On Time
(0000)
ENT
Yes
Ref: MINIFLEX LR MANUAL Rev. 0 27
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