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Setup 1 with external tank (ETS1)
In setup 1 the flow from the internal tank (46) through the
overflow pipe to the external tank (ETS1) is based either on
gravity or an external pump that is controlled by the operating
company and not by the AQpure system. Once the
task has filled the internal tank (46), the water flows from the top
of the internal tank (46) to the top of the external tank (ETS1).
If a level sensing module is part of the system, the level in the
external tank (ETS1) is measured and the
stopped, when the external tank (ETS1) is full. Otherwise the
Production
task is only stopped at the end of production runtime
or for internal cleaning tasks. A parameter must be set according
to the availability of the level sensing module.
See also section:
6.5.1 External tank setup
Chlorination
If the chlorination module (fig. 5, pos. 6) is part of the system,
sodium hypochlorite solution can be added to the water. The
sodium hypochlorite reduces the bacteria growth in the system
after the injection point, e.g. in the internal water tank. The
sodium hypochlorite solution is dosed with dosing pump (GP5)
according to the flow measured by flow sensor (BF1). The sodium
hypochlorite dosing amount is adjustable. Observe section:
6.6.4 System
parameters.
6.6.6 Filling of the external tank
This section refers to fig.: 6-8.
This task is only relevant, if external tank (ETS2) is used (setup
2), otherwise see section:
6.6.5
water flow from the internal tank (46) to the external tank (ETS2)
utilising backwash pump (GP2). If the level sensing module (fig.
5, pos. 8) is part of the system, the level in the external tank is
measured by pressure sensor (BP7).
Activation
The following criteria must be fulfilled before the task is started:
•
The water in the internal tank (46) must not be reserved for
other pending tasks.
•
The UV system (45) must be active.
•
The internal tank (46) must not be empty.
•
The external tank (ETS2) must not be full.
•
The time of day must be within the specified production
runtime.
•
The following tasks are conflicting and must be inactive:
–
Backwash of self-cleaning prefilter
–
Backwash of UF membrane
–
Backwash of GAC filter
–
Internal CIP
•
No active alarms.
Alarm handling
If an alarm is activated while the task is active, the following
sequence is activated:
1. The backwash pump (GP2) is stopped.
2. If a distribution module is part of the system, solenoid valve
(MB1) is 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.
6.6.7 Tapping UV light
This section refers to fig.: 6-8.
This task controls the flow from the external tank (ETS1 or ETS2)
through the UV disinfection system (45) and out of the system to
the water tapping device (e.g. AQtap dispenser). If the system
does not include an UV disinfection module, the task is disabled
and has no function.
Production
Production
task is
options.
Production. The task controls the
Activation
The following criteria must be fulfilled before the task is started:
•
If a level sensing module is available, the external tank (ETS1
or ETS2) must not be empty. Otherwise the internal tank (46)
must not be empty.
•
The UV light bulb must be warmed up.
•
No active alarms.
If the system is switched into semi-automatic mode, the task is
stopped. Once the system is switched back to automatic mode,
the task is automatically activated again.
Alarm handling
If an alarm is activated while the task is active, the following
sequence is activated:
1. UV light (45) is deactivated.
2. Solenoid valve (MB2) is 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.
UV light
The UV light is switched on automatically, when production
runtime starts in the morning. It is switched off, when production
runtime ends and if an alarm is activated.
To reach a sufficient disinfection performance, the UV light
requires a certain warm-up time, usually 3 minutes. During this
time no tapping of water is possible. The warm-up time is not
adjustable.
6.6.8 Backwash of self-cleaning prefilter
This section refers to fig.: 6-8.
This task controls the frequent automatic backwash (BW) of the
self-cleaning prefilter (5). The purpose of this task is to remove
fouling from the prefilter.
Activation
The task can be activated by different criteria:
•
Activation after:
Backwash of UF
•
Activation after:
Internal
CIP.
•
Activation, if the pressure over the prefilter (POF) exceeds a
predefined limit (e.g. 0.35 bar).
•
Activation after long idle time.
•
Manual activation, when the system is in semi-automatic
mode.
Furthermore, the following criteria must be met:
•
The tasks Production,
Backwash of UF membrane
Backwash of GAC filter
must be inactive. If
active, it is stopped.
•
No active alarms.
Supervision
The system monitors the volume of water passing the prefilter
between two backwashes. An alarm is triggered, if a predefined
minimum volume is not achieved.
Furthermore, the system monitors the time required for the
backwash of the prefilter. If the time exceeds a predefined value,
an alarm is triggered.
See section:
7.5.1 List of warnings and
Alarm handling
If an alarm is activated while the task is active, the following
sequence is activated:
1. Feed pump (GP1) is stopped.
2. Motor valve (MK2) is opened.
3. When the pressure at sensor (BP1) falls below a predefined
value, 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. If the
system is in automatic mode and the alarm is reset, the task is
repeated.
membrane.
and
Production
is
alarms.
21
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