ProMinent DULCOMETER PH-501 Assembly And Operating Instructions Manual page 534

Tag Description
Permeate
P-702
Transfer Pump
Clean In Place
SV-801 Tank Fill
Solenoid Valve
Backwash
MV-701
Actuated Valve
Backwash
MV-702
Actuated Valve
newterra O&M Manual
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Control Logic
The permeate pump will be ON when
MBR-2 is Enabled & level switch
LSH-602 = Active & & LT-501 >
LT501-PERM-SP
The Pump will perform a
PULL/RELAX Cycle. The pump will
be ON for the duration specified by
the PERM-PULL-TIME setpoint and
then be OFF for the duration of the
RELAX-TIME setpoint. This will
generate one PULL/RELAX Cycle.
The VFD Speed of the pump will
operate based on the following:
In FLOW MODE:
The VFD Speed will operate based
on a PID loop to maintain the
flowrate setpoint FT-702-SP.
IF the vacuum transmitter VT-702 > -
0.25 bar then the pump will switch to
VAC MODE.
IF the level transmitter LT-301 >
FLUX-SP, the pump will run via PID
loop to maintain a high flow setpoint
FT-702-HFSP
In VAC MODE:
The VFD Speed will operate based
on a PID loop to maintain the
vacuum setpoint VT-702-SP.
IF the level transmitter LT-301 >
FLUX-SP, the pump will run via PID
loop to maintain a high flow setpoint
VT-702-HFSP
P-702 will be OFF if P-502 is OFF.
The Solenoid Valve SV-801 will be
Open (Energized) when level switch
LSH-801 is InActive and MBR-1 OR
MBR-2 are not in Backwash.
The Solenoid Valve SV-801will be
Closed (De-Engergized) when LSH-
801 is Active or IF MBR-1 OR MBR-2
are in Backwash.
A Backwash is enabled once the
permeate pumps for MBR-1 reach
the number of PULL/RELAX cycles
designated by the RELAX-SP on the
HMI.the The actuated valve will be
OPEN when MBR-1 is in Backwash
and level switch LSH-801 is Active. If
MBR-2 is already in backwash, MBR-
1 will complete 1 additional
PULL/RELAX Cycle before starting a
Backwash Cycle.
A Backwash is enabled once the
permeate pumps for MBR-2 reach
the number of PULL/RELAX cycles
designated by the RELAX-SP on the
HMI.
the The actuated valve will be OPEN
when MBR-2 is in Backwash and
level switch LSH-801 is Active.
If MBR-2 is already in backwash,
MBR-1 will complete 1 additional
PULL/RELAX Cycle before starting a
Backwash Cycle.
1291 California Avenue, Brockville, ON K6V 5W3
(800) 420-4056 / www.newterra.com
Alarm Output
Interactions Type
VFDA-703:
Communication
Pump Will be Off
Discrete
Discrete
Discrete
newterra ltd.
Hour
Meter
Y
67