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Furthermore, the following criteria must be met:
•
All other tasks must be inactive.
•
Manual control must not be active.
•
There must be enough water in the internal tank (46).
– If there is not enough water in the internal tank, the system
starts
Production
until enough water is prepared and then
activates the task.
•
The chemical tank (21) must not be empty.
•
The battery capacity must be above 25 % (only relevant, if the
solar package module is included).
•
No active alarms.
Alarm handling
If an alarm is activated while the task is active, the following
sequence is activated:
1. Pumps (GP1), (GP2), (GP3) and (GP5) are stopped.
2. All motor valves (MK) are closed.
The system remains stopped, until the problem is remedied and
the [Reset] button is pressed at the HMI. Alternatively, certified
service staff can reset the alarm in the service menu.
6.6.11 Backwash of GAC filter
This section refers to fig.: 6-9.
The GAC filter (39) is backwashed daily to remove fouling.
Activation
The task can be activated by different criteria:
•
Activation at start or end of production runtime.
•
Activation as a result of high Pressure Over Filter (POF) value
for GAC filter (39).
•
Manual activation, when the system is in semi-automatic
mode.
Furthermore, the following criteria must be met:
•
All tasks must be inactive, except Production.
•
Manual control must not be active.
•
There must be enough water in the internal tank (46).
•
No active alarms.
The
Production
task runs while the
ongoing to ensure a sufficient water level in the internal tank.
Usually the
Backwash of GAC filter
of production runtime. See section:
end of
day.
Alarm handling
If an alarm is activated while the task is active, the following
sequence is activated:
1. Feed pump (GP1) and backwash pump (GP2) are stopped. If
present, the dosing pump (GP5) is stopped as well.
2. All motor valves (MK) are closed.
The system remains stopped, until the problem is remedied and
the [Reset] button is pressed at the HMI. Alternatively, certified
service staff can reset the alarm in the service menu.
6.6.12 Low power control
This task controls the system in case of power failure.
AQpure system with solar package module
Low power control
is activated in case of a power failure. If the
active task is Production,
Filling of the external tank
UV
light,
Low power control
halts the active task. If another task is
active,
Low power control
allows to execute the active task only. It
blocks the possibility to execute any other task.
Low power control
remains active, until the battery voltage
reaches 75 %. If production on external power is allowed,
power control
is deactivated as soon as external power is
available.
AQpure system with UPS
Low power control
is activated as soon as the external power is
not available. Once
Low power control
tasks are halted and the possibility to execute any other task is
blocked. All pumps, motor valves and solenoid valves are in OFF
state.
Low power control
is deactivated as soon as external
power is available.
Backwash of GAC filter
task is
is activated by start and end
6.6.3 Procedures for start and
or
Tapping
Low
is active, other active
6.6.13 PLC reboot
If there is no active task,
PLC reboot
midnight.
PLC reboot
is done only if the Reboot request flag is set
by the GRMInterface.
The Reboot request flag is set after a software update has been
performed by the GRMInterface.
See also section:
7.7 Grundfos Remote Management
6.6.14 External CIP
Warning
Danger of personal injury due to contact with
chemicals!
External CIP must only be carried out by certified
service staff. For further information about external
CIP see the Service Instructions.
This section refers to fig.: 6-9.
The purpose of the external Clean In Place (CIP) task is similar to
the internal CIP task to remove fouling from the UF membrane
and to recover its hydraulic properties. The external CIP is used,
when the internal CIP is not efficient anymore. An external CIP
task must be performed when the interval between internal CIP
tasks has reached the minimum value and the production flow is
reduced to the minimum flow. The task must only be performed
by certified service staff. The external CIP task requires additional
equipment that must be connected to the system. The additional
equipment is comprised in the external CIP unit package. A 1000
litre chemical waste tank (not included in the external CIP unit
package) must be provided on site.
The mobile external CIP unit uses the feed pump (GP1) and the
backwash pump (GP2) during the external CIP.
For the external CIP task an air compressor for air scouring is
required. If the system is not equipped with an air scouring
module, an external compressor must be connected to the air
hose installed at the bottom of the membrane.
The external CIP task consists of the following steps, which are
carried out in listed order:
1. Perform UF membrane backwash to fill the system with clean
water.
2. Connect external CIP system and chemical waste tank
(CWT).
3. Filling of chemical tank (50) with clean water (1st time).
4. Flushing the feed line.
5. Circulation and heating of clean water along UF membrane
(13).
6. Pouring chemicals manually into chemical tank (50).
7. Circulation of chemicals along and through UF membrane
(13).
8. Soaking.
9. Emptying of chemical tank (50) to chemical waste tank (CWT),
(1st time).
10. Backwash of chemicals inside the membrane to chemical
waste tank (CWT).
11. Filling of chemical tank (50) with clean water (2nd time).
12. Outside flush along UF membrane (13), (1st time).
13. Emptying of chemical tank (50) to chemical waste tank (CWT),
(2nd time).
14. Filling of chemical tank (50) with clean water (3rd time).
15. Outside flush along UF membrane (13), (2nd time).
16. Emptying of chemical tank (50) to chemical waste tank (CWT),
(3rd time).
17. Backwash to refill the system with clean water.
18. When last chemical is used, perform integrity test. See
section:
6.6.15 Integrity
test.
19. End of task
Activation
The external CIP can only be activated manually when the
following criteria are met:
•
System must be in semi-automatic mode.
•
All other tasks must be inactive.
is executed automatically at
(GRM).
23
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