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•
Manual control must not be active.
•
No active alarms.
If the system is not equipped with an air scouring module, an
external air compressor must be connected before the external
CIP can be started. A non-return valve must be installed between
the membrane and the external compressor to avoid ingress of
water into the compressor. The non-return valve must be installed
as close as possible to the membrane.
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.
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.
6.6.15 Integrity test
This section refers to fig.: 6-9.
The purpose of the integrity test, also referred to as pressure
decay test (PDT), is to test the UF membrane for broken or
damaged fibres. The task must only be performed by certified
service staff. The integrity test requires an air compressor that is
connected to the system. If the air scouring module is part of the
system, the air compressor (GP4) is utilised for the integrity test.
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.
During the integrity test, pressure is built up in the UF membrane
by the air compressor. A pressure drop within a certain period of
time indicates broken or damaged fibres.
The integrity test task consists of the following steps, which are
carried out in listed order:
1. Filling up of internal tank to have enough water to perform UF
backwash at the end of the integrity test.
2. Draining of UF membrane.
3. Pressurisation of UF membrane with air up to 1 bar.
4. Waiting 10 minutes to monitor the pressure drop.
5. If the pressure drop is below the value of parameter
"IntegrityPressureDropMax":
Fibres are intact. No leaks.
6. If the pressure drop is above the value of parameter
"IntegrityPressureDropMax":
Failure. At least one fibre is broken.
7. Depressurisation of UF membrane.
8. UF backwash to refill the system with clean water. The UF
backwash type is defined by parameter "UfBwVolumeType".
9. End of Integrity test.
Activation
The integrity tests can only be activated manually when the
following criteria are met:
•
System must be in semi-automatic mode.
•
There must be enough water in the internal tank (46). The
water is required for a UF backwash, which is performed after
the integrity test.
– If there is not enough water in the internal tank, the system
starts
Production
until enough water is prepared and then
activates the task.
•
Manual control must not be active.
•
All other tasks must be inactive.
•
No active alarms.
Alarm handling
If an alarm is activated while the task is active, the following
sequence is activated:
1. Motor valve (MK2) is opened and stays open to release
pressure.
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.
24
6.7 Power management
The operating company is responsible for the
preparation of the installation location according to
sections
1.2.2 Obligations of the operating company
and
4.
Installation.
Caution
The installation itself (installation of membrane and
GAC filter, hydraulic and electrical connection etc.)
must only be done by certified service staff according
to the separate service instructions, which are
supplied to certified service staff only.
The AQpure system is either equipped with the solar package
module or with an UPS (Uninterruptible Power Supply).
6.7.1 AQpure system with solar package module
P2
P3
GC
+A1
TB1
Fig. 10 AQpure system with solar package module
Pos. Description
P2
External AC power supply
+A2
Control cabinet
P3
Auxiliary contact
GC
Solar panels
The external AC power supply (P2) is connected to the control
cabinet (+A2). The control cabinet (+A2) is connected to the
inverter (TB1). The inverter (TB1) charges the batteries (GB)
either by external AC power supply (P2) coming from control
cabinet (+A2), or by DC power supply from solar panels (GC).
The inverter has two operation modes:
Operation
Description
mode
In line mode, the batteries (GB) are charged by
Line mode
external AC power supply (P2).
In solar mode, the batteries are charged by the
Solar mode
DC power supply from solar panels (GC).
If both power sources are available, the AC power supply (P2) is
prioritised.
The output of the inverter (TB1) is 230 VAC. If no external AC
power supply (P2) and no DC power supply (GC) is available, the
inverter uses the batteries (GB) to provide power to control
cabinet (+A2). If the battery voltage falls below 24.0 VDC, the
low-battery auxiliary contact (P3) provides a low-battery signal to
the controller. When receiving this signal, if production task is
running, the system is stopped instantly. If any other task is
running, the task is finished before the system is stopped.
AQpure
+A2
ME1
GB
Pos. Description
Solar panel junction
+A1
box
TB1 Bi-directional inverter
ME1 Isolator
GB
Batteries
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