Graf one2clean User manual
Document No. Graf-0004 Rev. 1
ONECLEAN TANKS
LOG BOOK
The drainage system from this property discharges to a
wastewater treatment plant (or septic tank, as appropriate). The
owner is legally responsible for routine maintenance and to ensure
that the system complies with any discharge consent issued by
the relevant authority for your area and that it does not present a
health and safety hazard or a nuisance.
Graf UK recommend service and maintenance should be carried out
at least once a year by a qualied engineer.
For further details contact Graf UK on 01608 661500.
BENEFITS
Graf UK Ltd
BENEFITS
One2Clean system
Benefits of the Graf system
• Extremely strong & robust injection moulded underground tank
• No concrete required, just gravel base and backfill
• Completely groundwater stable up to the centre line
• CE Certified system to EN 12566-3
• Market leading euent quality of 5, 6, 0.4 guaranteed on a 95
percentile basis. SBR Technology
• Integrated sampling chamber at no extra cost
• No moving parts inside the tank, easy to install, easy to
maintain.
• Plug in and play system, no wiring required
• 10 year warranty on the tank, 2 years on compressor and parts,
German engineered
• Low energy consumption of just 75 kwh
• Silent operation
• Programmable holiday mode
BIN IT DON‘T FLUSH IT!
Graf UK Ltd
BIN IT DON’T FLUSH IT!
Only substances with the characteristics of domestic wastewater
should enter the systems. Substances which are not biocompatible or
biodegradable must not enter the system because they can block the
pipes, contaminate the wastewater or kill necessary bacteria.
The following are not permitted:
• Rainwater from roofs and yards
•Infiltration water (e.g. drainage water)
•Liquid or solid residue from keeping animals
•Commercial or agricultural wastewater, unless it is comparable to
domestic
wastewater
•Chemicals, pharmaceuticals, mineral oils, solvents
•Cooling water
•Solids in the form of food waste, plastics and hygiene articles, coee
filters,
bottle tops and other domestic items
•Milk and milk products
•Water discharged from swimming pools
•Large volumes of blood
If discharging larger volumes of grease or plant-based oils, we would recommend pre-cleaning
the wastewater containing the greases/oils in a grease separator upstream of the wastewater
treatment system (caution: faeces must not be allowed to enter the grease separator!).
Please don’t flush or pour
Ash
Chemicals
Disinfectants
Paints
Photochemical
Chip fat
Adhesive plaster
Cat litter
Cigarette butts
Condoms
Corks
Varnishes
Medicines
Engine oil
Waste containing oil
Plant protection agents
Paintbrush cleaners
Cleaning agents, except
chlorine-free products (environmentally
sound)
Razor blades
Pipe cleaners
Pesticides
Panty liners
Cooking oil
Food waste
Wallpaper paste
Textiles (e.g. nylon tights, cleaning cloths,
handkerchiefs etc.)
Thinner
Bird sane, cat litter
Cotton buds
Toilet blocks
Nappies
Cement water
CE ONECLEAN
Graf UK Ltd
CE ONECLEAN
96,2%
98,6%
98,6%
Ammonia nitrogen 99,0%
Total nitrogen 79,1%
Nominal organic daily load (BOD5) 0,06 kg/d*PE
Nominal hydraulic daily flow (QN) 0,15 m3/d*PE
(water test)
(pit test)
2014
Treatment efficiency ratios
(at tested organis daily load BOD5=0,48
kg/d) SS:
Watertightness
Treatment capacity (nominal designation)
Ntot:
passed
passed
Valid for one2clean plants build in Carat S underground tanks
DE - Handelspapier nach DIN EN 12566-3
EN 12566-3:2013-09
for treatment of domestic wastewater
Packaged domestic wastewater treatment plant
Otto Graf GmbH, Carl-Zeiss-Str. 2-6, Germany
SBR-treatment one2clean for 3-18 inhabitants
Material: Polypropylene (PP)
BOD5:
COD:
Effectiveness of treatment
Durability
Crushing resistance
passed
NH4-N:
Reaction to fire
Release of dangerous substances
Class E
NPD
03/2014
Valid for one2clean plants build in Carat underground tanks
LOG BOOK ONECLEAN
Graf UK Ltd
LOG BOOK ONECLEAN
It is essential that you observe the points described in these instructions. Failure
to do so will invalidate all warranty claims. For all additional items ordered
from GRAF, separate installation instructions will be provided in the transport
packaging.
It is essential that you check the components for possible damage before
installation.
Contents
1. General Notes 6
2. Function of the Wastewater Treatment System 7
3. Start-up of the Control System 8
4. Operation of the Control System 9
5. Inspection and Maintenance 15
6. Fault Messages and Troubleshooting 17
7. Operating Notes 19
8. EC Declaration of Conformity 21
9. Declaration of Performance 22
10. Technical Data of the Control System 23
. GENERAL NOTES
Graf UK Ltd
GENERAL NOTES
1
Important tips for safe & long-lasting operation of the one2clean:
• The SBR system is designed for the treatment of all household sewage. The introduction of other wastewater, such as
the wastewater from restaurants and/or business establishments, etc. is permitted if these were already known at the
time of design of the system and were taken into account.
• Biocides, materials with a toxic eect or materials that are not biologically compatible must not enter the system, as
these impede bacteria important for wastewater treatment and lead to biological process problems (detailed notes
follow on the next pages).
It is imperative that you follow the operating and maintenance instructions for compliance with the regulatory
requirements for cleaning. These instructions can be found on the following pages.
Furthermore, we ask that you carefully read and observe the following notes:
• The location of the control system for indoor installation must be a dry, well-ventilated room (basement or garage).
• If an outdoor control cabinet is used, this should be placed in as shaded place as possible to avoid overheating.
• At no time must the cabinet be covered, in particular its air vents, and that it is freely accessible for maintenance.
• There must be a permanent power supply to the one2clean. Ensure that the control cabinet is adequately fused (16
A) and the power supply is fitted with isolator switch for repair & maintenance. Additional electrical components &
consumers should not be using the same fuse as they can could power failure and interfere with one2clean operation.
. FUNCTION OF THE WASTEWATER TREATMENT SYSTEM
Graf UK Ltd
2FUNCTION OF THE WASTEWATER TREATMENT SYSTEM
The one2clean small wastewater treatment system is fully biological and works according to the retention process with
long-term aeration (sequencing batch reactor). The system is essentially made up of an aerobic stage. This stage is split
into a rest area and an activation area. The chambers are connected to one another in the bottom section. During this
process, therefore, all domestic sewage is immediately exposed to aerobic wastewater treatment. The entire system is
aerated by compressed air being blown in and the sludge activated as a result of this biologically cleans the wastewater.
The coarse and floating solids contained in the wastewater are initially retained in the rest area by means of a bae.
The wastewater then passes through an overflow opening in the lower part of the container from the rest area into the
activation area.
As the rest area is also aerated, the solids which remain behind are also degraded aerobically over time. Wastewater
treatment is performed in the one2clean without pre-treatment, so that no anaerobic digestion processes can occur.
Operation of the treatment system is carried out via a microprocessor control system which controls the air compressor
and air distribution.
The SBR process is a sequence of dierent steps that occur at set times in a sequence and takes place at least once a day.
Step 1: Aeration
The wastewater is subjected directly to aerobic treatment for a fixed amount of time. On the one
hand the microorganisms (activated sludge) are supplied with the oxygen necessary for degradation;
on the other hand mixing is achieved as a result of pressure aeration. The air diuser of the system
is supplied with ambient air by a compressor. The aeration is intermittent, so as to allow targeted
wastewater treatment. Thus, dierent environmental conditions can be achieved.
Step 2: Settling
There is no aeration in the second phase. The activated sludge and the remaining settleable solids can
now settle by gravity. A clear water zone is created at the top and a layer of mud forms at the bottom.
Any floating sludge which might develop is located above the clear water zone.
Step 3: Clear Water Removal
The biologically treated wastewater (clear water) is extracted from the SBR stage. This is done by
pumping compressed air according to the mammoth pump principle (air lift pump). The air lift is
designed in such a way that no floating sludge which might develop is drained on the clear water layer.
A minimum water level in the system is maintained without additional components.
After execution of the third Step, the cleaning process begins again with step 1.
Two cycles are performed per day. The individual adaptation of switching times is possible on the part of the maintenance
company.
2. Function of the Wastewater Treatment System
22 / 57
2. Function of the Wastewater Treatment System
The one2clean small wastewater treatment system is fully biological and works according to the retention
process with long-term aeration (sequencing batch reactor). The system is essentially made up of an aer-
obic stage. This stage is split into a rest area and an activation area. The chambers are connected to one
another in the bottom section. During this process, therefore, all domestic sewage is immediately exposed
to aerobic wastewater treatment. The entire system is aerated by compressed air being blown in and the
sludge activated as a result of this biologically cleans the wastewater.
The coarse and floating solids contained in the wastewater are initially retained in the rest area by means
of a baffle. The wastewater then passes through an overflow opening in the lower part of the container
from the rest area into the activation area.
As the rest area is also aerated, the solids which remain behind are also degraded aerobically over time.
Wastewater treatment is performed in the one2clean without pre-treatment, so that no anaerobic digestion
processes can occur.
Operation of the treatment system is carried out via a microprocessor control system which controls the
air compressor and air distribution.
The SBR process is a sequence of different steps that occur at set times in a sequence and takes place
at least once a day.
Step 1: Aeration
The wastewater is subjected directly to aerobic treatment for a fixed amount of time. On
the one hand the microorganisms (activated sludge) are supplied with the oxygen nec-
essary for degradation; on the other hand mixing is achieved as a result of pressure
aeration. The air diffuser of the system is supplied with ambient air by a compressor.
The aeration is intermittent, so as to allow targeted wastewater treatment. Thus, differ-
ent environmental conditions can be achieved.
Step 2: Settling
There is no aeration in the second phase. The activated sludge and the remaining set-
tleable solids can now settle by gravity. A clear water zone is created at the top and a
layer of mud forms at the bottom. Any floating sludge which might develop is located
above the clear water zone.
Step 3: Clear Water Removal
The biologically treated wastewater (clear water) is extracted from the SBR stage. This
is done by pumping compressed air according to the mammoth pump principle (air lift
pump). The air lift is designed in such a way that no floating sludge which might develop
is drained on the clear water layer. A minimum water level in the system is maintained
without additional components.
After execution of the third Step, the cleaning process begins again with step 1.
Two cycles are performed per day. The individual adaptation of switching times is possible on the part of
the maintenance company.
2. Function of the Wastewater Treatment System
22 / 57
2. Function of the Wastewater Treatment System
The one2clean small wastewater treatment system is fully biological and works according to the retention
process with long-term aeration (sequencing batch reactor). The system is essentially made up of an aer-
obic stage. This stage is split into a rest area and an activation area. The chambers are connected to one
another in the bottom section. During this process, therefore, all domestic sewage is immediately exposed
to aerobic wastewater treatment. The entire system is aerated by compressed air being blown in and the
sludge activated as a result of this biologically cleans the wastewater.
The coarse and floating solids contained in the wastewater are initially retained in the rest area by means
of a baffle. The wastewater then passes through an overflow opening in the lower part of the container
from the rest area into the activation area.
As the rest area is also aerated, the solids which remain behind are also degraded aerobically over time.
Wastewater treatment is performed in the one2clean without pre-treatment, so that no anaerobic digestion
processes can occur.
Operation of the treatment system is carried out via a microprocessor control system which controls the
air compressor and air distribution.
The SBR process is a sequence of different steps that occur at set times in a sequence and takes place
at least once a day.
Step 1: Aeration
The wastewater is subjected directly to aerobic treatment for a fixed amount of time. On
the one hand the microorganisms (activated sludge) are supplied with the oxygen nec-
essary for degradation; on the other hand mixing is achieved as a result of pressure
aeration. The air diffuser of the system is supplied with ambient air by a compressor.
The aeration is intermittent, so as to allow targeted wastewater treatment. Thus, differ-
ent environmental conditions can be achieved.
Step 2: Settling
There is no aeration in the second phase. The activated sludge and the remaining set-
tleable solids can now settle by gravity. A clear water zone is created at the top and a
layer of mud forms at the bottom. Any floating sludge which might develop is located
above the clear water zone.
Step 3: Clear Water Removal
The biologically treated wastewater (clear water) is extracted from the SBR stage. This
is done by pumping compressed air according to the mammoth pump principle (air lift
pump). The air lift is designed in such a way that no floating sludge which might develop
is drained on the clear water layer. A minimum water level in the system is maintained
without additional components.
After execution of the third Step, the cleaning process begins again with step 1.
Two cycles are performed per day. The individual adaptation of switching times is possible on the part of
the maintenance company.
. STARTUP OF THE CONTROL SYSTEM
Graf UK Ltd
STARTUP OF THE CONTROL SYSTEM
3
After the system is connected to the power supply, a short system test is run, during which time the LED light is red. The
LED then becomes green when the start-up phase is completed.
During the system test, the notification “SYSTEM TEST ... OK”, the program version, and serial number of the control
system appear for a short time. Following this, the current operating status of the system is displayed. After the system
test is complete, the date and the current time should be checked and adjusted if necessary (see Section 4.2.3).
After checking the date/time, a functional check of the system components must be carried out. This check can only be
carried out if the necessary air hoses are connected. The check should be carried out via the menu point “manual mode”
in the control system, which is intended for this purpose. The individual parts of the system are tested for functionality.
After a successful check, the system is reset to automatic mode.
CAUTION: The clear water siphon only functions when the containers are filled.
If the date and time are not set correctly, operating faults will be stored with the incorrect time information.
. OPERATION OF THE CONTROL SYSTEM
Graf UK Ltd
4OPERATION OF THE CONTROL SYSTEM
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor allows for the
set-up of operating parameters, the display of operating conditions and the query of system parameters as well as the
programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The settings are then
confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automatically after
2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter operator- specific
settings.
6. Service level: A password-protected service level can be accessed from the operator level using an additional code.
This level is reserved for trained personnel. Here adjustments or changes can be made and diagnostic data is retrieved.
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start time in
accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be suppressed for the set
period of time. Only one holiday cycle with greatly reduced activity takes place at this time. During this time, no treated
wastewater will be removed, as there should be no supply.
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
Figure 2: View of the operating unit
. OPERATION OF THE CONTROL SYSTEM
Graf UK Ltd
OPERATION OF THE CONTROL SYSTEM
4
4. Operation of the Control System
25 / 57
4.1.1 Display of Operating Status
The operating status is indicated by the LEDs (green = operational / red = fault) and as text on the screen.
In normal operating mode (aeration mode), the display appears as follows:
In automatic mode, the liquid crystal display shows the current work phase and the remaining time left in
this phase.
If a fault occurs, the red LED is turned on. A message indicating which component is faulty appears in the
liquid crystal display (e.g. Fault Compressor 0.0A).
4.1.2 The following work phases are displayed
Display Process performed
Denitrification
Y3 valve (plug X1.1) is actuated intermittently; the activated sludge is briefly
mixed with the wastewater. This is followed by long pauses (response times).
Ventilation Y3 valve (plug X1.1) is actuated; the system is aerated in intervals over a long
period of time.
Sedimentation phase No valves are actuated, the activated sludge settles in the system.
Activity phase Y4 valve (plug X1.2) is actuated; the clear water is pumped into the drain.
Cycle pause/
holiday mode
Y3 valve (plug X1.1) is actuated; the system is aerated in intervals (considerably
less than in the aeration phase).
Rest: XXX:XXmin Display of remaining time.
Symbol Key assignment Function
Enter key Selection of operating mode, confirmation of entries
Scroll Display of operating modes and queries Programming of
the system by entering figures
Acknowledgement
Acknowledgement of entries without saving
Acknowledgement of fault messages
Aeration
Rest: 120:10min
4.1.1 Display of Operating Status
The operating status is indicated by the LEDs (green = operational / red = fault) and as text on the screen.
In normal operating mode (aeration mode), the display appears as follows:
Aeration
Rest: 120:10min
In automatic mode, the liquid crystal display shows the current work phase and the remaining time left in this phase.
If a fault occurs, the red LED is turned on. A message indicating which component is faulty appears in the liquid crystal
display (e.g. Fault Compressor 0.0A).
4.1.2 The following work phases are displayed
Display Process performed
Denitrification Y3 valve (plug X1.1) is actuated intermittently; the activated sludge is brieflymixed
with the wastewater. This is followed by long pauses (response times).
Ventilation Y3 valve (plug X1.1) is actuated; the system is aerated in intervals over a long
period of time.
Sedimentation phase No valves are actuated, the activated sludge settles in the system.
Activity phase Y4 valve (plug X1.2) is actuated; the clear water is pumped into the drain.
Cycle pause/holiday mode Y3 valve (plug X1.1) is actuated; the system is aerated in intervals (considerably
less than in the aeration phase).
Rest: XXX:XXmin Display of remaining time.
Symbol Key assignment Function
Enter key Selection of operating mode, confirmation of entries
Scroll Display of operating modes and queries Programming of
the system by entering figures
Acknowledgement Acknowledgement of entries without saving
Acknowledgement of fault messages
4. Operation of the Control System
25 / 57
4.1.1 Display of Operating Status
The operating status is indicated by the LEDs (green = operational / red = fault) and as text on the screen.
In normal operating mode (aeration mode), the display appears as follows:
In automatic mode, the liquid crystal display shows the current work phase and the remaining time left in
this phase.
If a fault occurs, the red LED is turned on. A message indicating which component is faulty appears in the
liquid crystal display (e.g. Fault Compressor 0.0A).
4.1.2 The following work phases are displayed
Display Process performed
Denitrification
Y3 valve (plug X1.1) is actuated intermittently; the activated sludge is briefly
mixed with the wastewater. This is followed by long pauses (response times).
Ventilation Y3 valve (plug X1.1) is actuated; the system is aerated in intervals over a long
period of time.
Sedimentation phase No valves are actuated, the activated sludge settles in the system.
Activity phase Y4 valve (plug X1.2) is actuated; the clear water is pumped into the drain.
Cycle pause/
holiday mode
Y3 valve (plug X1.1) is actuated; the system is aerated in intervals (considerably
less than in the aeration phase).
Rest: XXX:XXmin Display of remaining time.
Symbol Key assignment Function
Enter key Selection of operating mode, confirmation of entries
Scroll Display of operating modes and queries Programming of
the system by entering figures
Acknowledgement
Acknowledgement of entries without saving
Acknowledgement of fault messages
Aeration
Rest: 120:10min
4. Operation of the Control System
25 / 57
4.1.1 Display of Operating Status
The operating status is indicated by the LEDs (green = operational / red = fault) and as text on the screen.
In normal operating mode (aeration mode), the display appears as follows:
In automatic mode, the liquid crystal display shows the current work phase and the remaining time left in
this phase.
If a fault occurs, the red LED is turned on. A message indicating which component is faulty appears in the
liquid crystal display (e.g. Fault Compressor 0.0A).
4.1.2 The following work phases are displayed
Display Process performed
Denitrification
Y3 valve (plug X1.1) is actuated intermittently; the activated sludge is briefly
mixed with the wastewater. This is followed by long pauses (response times).
Ventilation Y3 valve (plug X1.1) is actuated; the system is aerated in intervals over a long
period of time.
Sedimentation phase No valves are actuated, the activated sludge settles in the system.
Activity phase Y4 valve (plug X1.2) is actuated; the clear water is pumped into the drain.
Cycle pause/
holiday mode
Y3 valve (plug X1.1) is actuated; the system is aerated in intervals (considerably
less than in the aeration phase).
Rest: XXX:XXmin Display of remaining time.
Symbol Key assignment Function
Enter key Selection of operating mode, confirmation of entries
Scroll Display of operating modes and queries Programming of
the system by entering figures
Acknowledgement
Acknowledgement of entries without saving
Acknowledgement of fault messages
Aeration
Rest: 120:10min
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
4. Operation of the Control System
26 / 57
4.2 Operating the Control System
You can start different queries from the automatic mode.
You can access the first operating level by pressing . You can now call up the individual queries using
the arrow keys and then pressing :
Display Meaning
Operating mode
Remaining time
Remaining time in current work phase
Operating hours Display of the operating hours of the valve and compressor
Manual operation Manual control of the valve
Date
Time Current time, day and date. Can be set using
Holiday mode Holiday mode set-up (max. 90 days)
Faults Operational faults which occur are stored here and can be read. It is possible to
switch between the error message and the corresponding date using
and
Settings The current settings can be viewed using the arrow keys
Service menu For qualified personnel
4.2.1 Operating Hours Query
Press the button. On the screen will appear:
By pressing again, the operating hours for the valves and the compressor can be displayed in se-
quence using the arrow keys .
Pressing
.
Note: If you do not press any buttons for a period of 10 minutes, normal operation will begin automatical-
ly.
Operating hours
meter reading
. OPERATION OF THE CONTROL SYSTEM
Graf UK Ltd
4OPERATION OF THE CONTROL SYSTEM
4.2 Operating the Control System
You can start dierent queries from the automatic mode.
You can access the first operating level by pressing . You can now call up the individual queries using the arrow keys
and then pressing :
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
Display Meaning
Operating mode
Remaining time
Remaining time in current work phase
Operating hours Display of the operating hours of the valve and compressor
Manual operation Manual control of the valve
Date
Time
Current time, day and date. Can be set using
Holiday mode Holiday mode set-up (max. 90 days)
Faults Operational faults which occur are stored here and can be read. It is possible to
switch between the error message and the corresponding date using and
Settings The current settings can be viewed using the arrow keys
Service menu For qualified personnel
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
4.2.1 Operating Hours Query
Press the button. On the screen will appear:
Operting hours
meter reading
By pressing again, the operating hours for the valves and the compressor can be displayed in sequence using the
arrow keys .
Pressing once will take you back to the display “display operting hours”. You can access the “manual mode” menu
by pressing .
kNote: If you do not press any buttons for a period of 10 minutes, normal operation will begin automatically.
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
4. Operation of the Control System
25 / 57
4.1.1 Display of Operating Status
The operating status is indicated by the LEDs (green = operational / red = fault) and as text on the screen.
In normal operating mode (aeration mode), the display appears as follows:
In automatic mode, the liquid crystal display shows the current work phase and the remaining time left in
this phase.
If a fault occurs, the red LED is turned on. A message indicating which component is faulty appears in the
liquid crystal display (e.g. Fault Compressor 0.0A).
4.1.2 The following work phases are displayed
Display Process performed
Denitrification
Y3 valve (plug X1.1) is actuated intermittently; the activated sludge is briefly
mixed with the wastewater. This is followed by long pauses (response times).
Ventilation Y3 valve (plug X1.1) is actuated; the system is aerated in intervals over a long
period of time.
Sedimentation phase No valves are actuated, the activated sludge settles in the system.
Activity phase Y4 valve (plug X1.2) is actuated; the clear water is pumped into the drain.
Cycle pause/
holiday mode
Y3 valve (plug X1.1) is actuated; the system is aerated in intervals (considerably
less than in the aeration phase).
Rest: XXX:XXmin Display of remaining time.
Symbol Key assignment Function
Enter key Selection of operating mode, confirmation of entries
Scroll Display of operating modes and queries Programming of
the system by entering figures
Acknowledgement
Acknowledgement of entries without saving
Acknowledgement of fault messages
Aeration
Rest: 120:10min
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
Graf UK Ltd
. OPERATION OF THE CONTROL SYSTEM
OPERATION OF THE CONTROL SYSTEM
4
4.2.2 Manual Control of the Valve using “Manual Operation”
During checks, each valve should run for at least 5 seconds, as the monitoring the current consumption of
the valves takes some time before any faults are detected.
In automatic mode, first press then the arrow key until the following is displayed on the screen:
Manual operation
By pressing on the button again, you will receive the following message:
Aeration OFF
Pressing allows you to turn the selected programme on and o.
The other programs can be selected using the arrow keys .
Pressing once will take you back to the display “manual mode”.
4.2.3 Set Date/Time
Press and then the arrow keys until the following is displayed on the screen (example):
19-12-2007 Mon
20:15:56
By pressing , the time and date can then be set using the arrow keys .
To confirm the correction, you must press each time.
Pressing once will take you to the next display in holiday mode.
A correctly set system clock and date display is absolutely mandatory in order to record the hours of operation and so
that any faults can be traced. There is no automatic change from summer to winter time.
NOTE: If you do not press any buttons for a period of 10 minutes, normal operation will begin automatically.
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
4. Operation of the Control System
25 / 57
4.1.1 Display of Operating Status
The operating status is indicated by the LEDs (green = operational / red = fault) and as text on the screen.
In normal operating mode (aeration mode), the display appears as follows:
In automatic mode, the liquid crystal display shows the current work phase and the remaining time left in
this phase.
If a fault occurs, the red LED is turned on. A message indicating which component is faulty appears in the
liquid crystal display (e.g. Fault Compressor 0.0A).
4.1.2 The following work phases are displayed
Display Process performed
Denitrification
Y3 valve (plug X1.1) is actuated intermittently; the activated sludge is briefly
mixed with the wastewater. This is followed by long pauses (response times).
Ventilation Y3 valve (plug X1.1) is actuated; the system is aerated in intervals over a long
period of time.
Sedimentation phase No valves are actuated, the activated sludge settles in the system.
Activity phase Y4 valve (plug X1.2) is actuated; the clear water is pumped into the drain.
Cycle pause/
holiday mode
Y3 valve (plug X1.1) is actuated; the system is aerated in intervals (considerably
less than in the aeration phase).
Rest: XXX:XXmin Display of remaining time.
Symbol Key assignment Function
Enter key Selection of operating mode, confirmation of entries
Scroll Display of operating modes and queries Programming of
the system by entering figures
Acknowledgement
Acknowledgement of entries without saving
Acknowledgement of fault messages
Aeration
Rest: 120:10min
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
Graf UK Ltd
. OPERATION OF THE CONTROL SYSTEM
4OPERATION OF THE CONTROL SYSTEM
4.2.4 Setting-up Holiday Mode
NOTE: Holiday mode results in the reduced operation of the wastewater treatment system. It should only be applied
when no wastewater is introduced into the wastewater treatment system during the selected time period. Wastewater
that passes into the system during the holiday mode period will not be cleaned. Holiday mode is switched on and o
automatically for the data you have entered.
Press , then press the arrow buttons until the following appears on the screen:
Vacation oper.
Press again to release the input of holiday dates:
Start: YYYY-MM-DD
End: YYYY-MM-DD
Start of holiday:
The start of holiday mode is entered in the format YYYY-MM-DD by pressing . To switch between the dierent
settings, the button must be pressed in each case.
End of holiday:
As with for the start of the holiday, the end of holiday mode is entered in the year, month and day format YYYY-MM-DD by
pressing .
Press the button to save the input data for holiday mode and to exit this function.
Pressing returns you to the automatic mode display.
NOTE: If you do not press any buttons for a period of 2 minutes, normal operation will begin automatically without the
date that you have just entered being saved.
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
4. Operation of the Control System
25 / 57
4.1.1 Display of Operating Status
The operating status is indicated by the LEDs (green = operational / red = fault) and as text on the screen.
In normal operating mode (aeration mode), the display appears as follows:
In automatic mode, the liquid crystal display shows the current work phase and the remaining time left in
this phase.
If a fault occurs, the red LED is turned on. A message indicating which component is faulty appears in the
liquid crystal display (e.g. Fault Compressor 0.0A).
4.1.2 The following work phases are displayed
Display Process performed
Denitrification
Y3 valve (plug X1.1) is actuated intermittently; the activated sludge is briefly
mixed with the wastewater. This is followed by long pauses (response times).
Ventilation Y3 valve (plug X1.1) is actuated; the system is aerated in intervals over a long
period of time.
Sedimentation phase No valves are actuated, the activated sludge settles in the system.
Activity phase Y4 valve (plug X1.2) is actuated; the clear water is pumped into the drain.
Cycle pause/
holiday mode
Y3 valve (plug X1.1) is actuated; the system is aerated in intervals (considerably
less than in the aeration phase).
Rest: XXX:XXmin Display of remaining time.
Symbol Key assignment Function
Enter key Selection of operating mode, confirmation of entries
Scroll Display of operating modes and queries Programming of
the system by entering figures
Acknowledgement
Acknowledgement of entries without saving
Acknowledgement of fault messages
Aeration
Rest: 120:10min
Graf UK Ltd
. OPERATION OF THE CONTROL SYSTEM
OPERATION OF THE CONTROL SYSTEM
4
4.2.5 Old Faults
The controll system stores all past fault messages and the operation of the control system via the “manual mode”
function. Past fault messages with date and time can be read under the menu item “Old faults”. The individual messages
can be accessed using the arrow keys. You can exit the menu item by pressing .
Faults are indicated as encoding, in order of their appearance, starting with number 0 (latest signal).
The faults number 2 (net is back) and number 5 (manual operation) are no faults. They will be registered for a better
temporal localization of possibly occurring faults or rather monitoring of manual activities on the control system.
4.2.6 Display Settings
This menu item allows the current control system settings to be seen. It is not possible to change these settings. This
menu item is used to analyse the settings without making changes. The individual settings can be called up using the
arrow keys . You can exit the menu item by pressing .
4.2.7 Service Menu
Operating parameters can be changed in the service menu. Access is protected with a code. This second
maintenance level is reserved exclusively for qualified specialist personnel only!
Any access to the control system settings by unauthorised persons will cause the warranty to expire!
4. Operation of the Control System
25 / 57
4.1.1 Display of Operating Status
The operating status is indicated by the LEDs (green = operational / red = fault) and as text on the screen.
In normal operating mode (aeration mode), the display appears as follows:
In automatic mode, the liquid crystal display shows the current work phase and the remaining time left in
this phase.
If a fault occurs, the red LED is turned on. A message indicating which component is faulty appears in the
liquid crystal display (e.g. Fault Compressor 0.0A).
4.1.2 The following work phases are displayed
Display Process performed
Denitrification
Y3 valve (plug X1.1) is actuated intermittently; the activated sludge is briefly
mixed with the wastewater. This is followed by long pauses (response times).
Ventilation Y3 valve (plug X1.1) is actuated; the system is aerated in intervals over a long
period of time.
Sedimentation phase No valves are actuated, the activated sludge settles in the system.
Activity phase Y4 valve (plug X1.2) is actuated; the clear water is pumped into the drain.
Cycle pause/
holiday mode
Y3 valve (plug X1.1) is actuated; the system is aerated in intervals (considerably
less than in the aeration phase).
Rest: XXX:XXmin Display of remaining time.
Symbol Key assignment Function
Enter key Selection of operating mode, confirmation of entries
Scroll Display of operating modes and queries Programming of
the system by entering figures
Acknowledgement
Acknowledgement of entries without saving
Acknowledgement of fault messages
Aeration
Rest: 120:10min
4. Operation of the Control System
24 / 57
4. Operation of the Control System
The operation of the system is carried out via a microprocessor in the control unit. The microprocessor
allows for the set-up of operating parameters, the display of operating conditions and the query of system
parameters as well as the programming of working times through a specialist company.
Adjustments are made by scrolling through numerical values using the two arrow keys . The set-
tings are then confirmed by pressing the button.
The individual dialogues can be terminated ahead of time by pressing or will be terminated automati-
cally after 2 minutes.
The control system is broken down into the following display pages:
4. Basic level: Status of the cycle sequence with the elapsing remaining time, as well as the display of
error messages.
5. Operator level: The operator can access the operator level by pressing the button and enter oper-
ator-specific settings.
6. Service level: A password-protected service level can be accessed from the operator level using an
additional code. This level is reserved for trained personnel. Here adjustments or changes can be
made and diagnostic data is retrieved.
Figure 2: view of the operating unit
4.1 Control Programme
The control system switches the outputs for air compressors and stepper motors on a timer.
The timing is determined by the set sequence tables. A complete cleaning cycle is started for each start
time in accordance with the selected sequence table.
By setting up holiday times in the operator level, the complete sequence of cleaning cycles can be sup-
pressed for the set period of time. Only one holiday cycle with greatly reduced activity takes place at this
time. During this time, no treated wastewater will be removed, as there should be no supply.
Coding Meaning
1 Power failure (system is currentless)
2 Net is back (system regains power)
3 Compressor has over-current
4 Compressor current supply too low
5 Manual operation
4. Operation of the Control System
25 / 57
4.1.1 Display of Operating Status
The operating status is indicated by the LEDs (green = operational / red = fault) and as text on the screen.
In normal operating mode (aeration mode), the display appears as follows:
In automatic mode, the liquid crystal display shows the current work phase and the remaining time left in
this phase.
If a fault occurs, the red LED is turned on. A message indicating which component is faulty appears in the
liquid crystal display (e.g. Fault Compressor 0.0A).
4.1.2 The following work phases are displayed
Display Process performed
Denitrification
Y3 valve (plug X1.1) is actuated intermittently; the activated sludge is briefly
mixed with the wastewater. This is followed by long pauses (response times).
Ventilation Y3 valve (plug X1.1) is actuated; the system is aerated in intervals over a long
period of time.
Sedimentation phase No valves are actuated, the activated sludge settles in the system.
Activity phase Y4 valve (plug X1.2) is actuated; the clear water is pumped into the drain.
Cycle pause/
holiday mode
Y3 valve (plug X1.1) is actuated; the system is aerated in intervals (considerably
less than in the aeration phase).
Rest: XXX:XXmin Display of remaining time.
Symbol Key assignment Function
Enter key Selection of operating mode, confirmation of entries
Scroll Display of operating modes and queries Programming of
the system by entering figures
Acknowledgement
Acknowledgement of entries without saving
Acknowledgement of fault messages
Aeration
Rest: 120:10min
. INSPECTION AND MAINTENANCE
Graf UK Ltd
5INSPECTION AND MAINTENANCE
5.1 Obligations of the Operator
The system must always be turned on. The operator is obliged to ensure the fault-free operation of the system. Almost all
operational faults lead to a deterioration of the system’s cleaning performance. These should therefore be detected at an
early stage and eliminated immediately by you or a qualified service technician.
5.1.1 Daily checks
The system should be checked daily for correct operation. The system is operating correctly when the
operating control is lit up green and no warning signal can be heard.
5.1.2 Monthly checks
• Visual inspection for any sludge output, turbidity or discoloration in the flow
• Check inflows and outflows for blockages (visual inspection)
• Read the operating hours counter on the air compressor (total operating hours), the ventilation (Y3 valve) and the clear
water run-o (Y4 valve) and record in the operating log
5.2 Maintenance by a Specialist Company
Maintenance is carried out by a specialist company (experts) at least twice a year (approximately every 6 months). The
time intervals and tasks specified by the local water authority in the consent permit under water laws also apply. For this
purpose, the system owner must complete a maintenance contract with a qualified specialist.
• The following tasks should be carried out in relation to maintenance:
• Inspection of the log book with determination of the regular operation (target-actual comparison),
• Check the air filter of the air compressor,
• Maintenance of the air compressor according to the manufacturer’s instructions,
• Functional check of the air compressor and stepper motors,
• Carry out general cleaning work, e.g. removal of deposits,
• Check for adequate ventilation,
• Examination of activation tank:
– Oxygen concentration (O2/l > 2 mg), adjust the operating time of the compressor if necessary,
– Sludge volume ( < 900 ml/l),
If the sludge volume is greater than 900 ml/l, the sludge must be removed.
Maintenance tasks carried out, any damage detected or repairs made as well as other instances should be summarised
by the maintenance company in a maintenance report.
. INSPECTION AND MAINTENANCE
Graf UK Ltd
INSPECTION AND MAINTENANCE
5
5.3 Determination of Sludge Removal
In order to determine the need for sludge removal in the wastewater treatment system, a settling test should be carried
out at maintenance intervals. For this settling test, the SV30 is measured. The SV30 is the sludge volume occupied by
1000 ml of activated sludge after a settling period of 30 minutes. It is a measure of the amount of sludge present in the
wastewater treatment system.
Measurement of the SV30 is carried out in a 1000 ml graduated cylinder.
The following points must be observed during this measurement:
A. Turn ventilation on - if not active - and allow to mix for a short time
B. Submerge the scoop into the tank and remove sludge sample
C. Fill the graduated cylinder with the sludge sample up to the 1000 ml mark
D. Let the cylinder containing the sample stand in a place free from vibrations for 30 minutes
E. Read the sludge level and carry out sludge removal if this is > 900 ml/l
5.4 Sludge Removal
Removing sludge from the wastewater treatment system should be carried out according to the following points:
F. Remove the cover
G. Remove the deposits on the water surface and on all visible surfaces (bae, sample container, siphon)
H. Wash down the visible surfaces
I. Insert the suction hose into the wastewater treatment tank until it reaches the floor
(CAUTION: air admittance valves on the ground must not be damaged!)
J. Aspirate until about 30 cm of wastewater and sludge remain in the wastewater treatment system
K. After emptying the tank, you should refill the tank with fresh water again so the tanks is two thirds full.
5. Inspection and Maintenance
31 / 57
5.3 Determination of Sludge Removal
In order to determine the need for sludge removal in the wastewater treatment system, a settling test
should be carried out at maintenance intervals. For this settling test, the SV30 is measured. The SV30 is
the sludge volume occupied by 1000 ml of activated sludge after a settling period of 30 minutes. It is a
measure of the amount of sludge present in the wastewater treatment system.
Measurement of the SV30 is carried out in a 1000 ml graduated cylinder.
The following points must be observed during this measurement:
6. Turn ventilation on - if not active - and allow to mix for a short time
7. Submerge the scoop into the tank and remove sludge sample
8. Fill the graduated cylinder with the sludge sample up to the 1000 ml mark
9. Let the cylinder containing the sample stand in a place free from vibrations for 30 minutes
10. Read the sludge level and carry out sludge removal if this is > 900 ml/l
11. After emptying the tank have to be filled up with fresh water again
5.4 Sludge Removal
Removing sludge from the wastewater treatment system should be carried out according to the following
points:
7. Remove the cover
8. Remove the deposits on the water surface and on all visible surfaces (baffle, sample container,
siphon)
9. Wash down the visible surfaces
10. Insert the suction hose into the wastewater treatment tank until it reaches the floor
(CAUTION: air admittance valves on the ground must not be damaged!)
11. Aspirate until about 30 cm of wastewater and sludge remain in the wastewater treatment system
Fill the graduated
cylinder with the
sludge sample up
to the 1000 ml
mark
30 minutes
Read the sludge
level an carry out
sludge removal if
this is > 900 ml/l
Fill the graduated
cylinder with the
sludge sample up to
the 1000 ml mark
Read the sludge level
and carry out sludge
removal if this is
> 900 ml/l
k
30 minutes
. FAULT MESSAGES AND TROUBLESHOOTING
Graf UK Ltd
6FAULT MESSAGES AND TROUBLESHOOTING
Technical problems of system operation (failure of a unit) are visually displayed.
6.1 System Behaviour after switching o the Power Supply
If the system is disconnected from the mains (e.g. power failure), the control program and the counted operating hours
are retained due to the memory of the control system. The red LED will light up. When the system is supplied with power
again, it will self-start.
NOTE: If the system is disconnected from the mains for more than 24 hours, cleaning of the existing wastewater is not or
is only possible to a very limited extent.
6.2 Fault Message in the Display
Faults are shown as text or as numbered codes on the liquid crystal display. The operating control lamp then lights up
red.
The numbered fault codes are explained below:
A. Power failure (system is de-energised)
B. Power returned (system is supplied with power again)
C. Compressor has overcurrent
D. Compressor power supply too low
E. Manual operation
The displays no. 2 (power returned) and no. 5 (manual mode) are not faults in the proper sense. These are only registered
as fault messages for better time limitations of any faults that occur and for monitoring manual activities on the control
system.
Table 2: Fault Causes and Troubleshooting
Display Possible cause Remedy
Mains failure
No display, no light
• Power failure
• System turned o
• There is no voltage
at the control cabinet
• Check the power supply to the system and to the control system
• Turn system back on
• Check supply to the control cabinet
• Wait for resumption of power supply
No display, light is green • Turn system o and back on again after 10 seconds
Mains returned • Power available
again
Set the clock • Internal clock/date
not set
• Set date and time via menu item
Compressor
**overcurrent**
• Short-circuit • Check supply to the control cabinet
Compressor **current
too low**
• Compressor does not
work / is not
receiving power
• Check the compressor in manual mode
Manual operation • System was
activated manually
in manual mode
. FAULT MESSAGES AND TROUBLESHOOTING
Graf UK Ltd
FAULT MESSAGES AND TROUBLESHOOTING
6
Observation Possible cause Remedy
The water level in
the activation tank
is unusually high
• System is running in holiday mode
• System runs continually in cycle pause
• Control system settings are incorrect
• The drain siphon is clogged
• The air hose to the drain siphon is leaking
• System has been flooded from external
water source and not allowing water to
drain from the system
• Control system is defective
• End holiday mode
• Have the control system settings checked by the
maintenance technician
• Allow tank to be pumped out and clean siphons
• Seal hose connections
• Wait out flooding
• Get in touch with maintenance company
The system smells,
the treated water
is cloudy or
discoloured
• Too little air is entering the system
• Single-sided ventilation due to defective
air admittance valves
• Have service company increase ventilation time
• Check the ventilation, get in touch with
maintenance company
Ventilation is
onesided or large
air bubbles appear
at points
• Membrane unit is defective
• Seal leaky air admittance valves
• Get in touch with maintenance company
• Get in touch with maintenance company
6.3 Unusual Water Levels - Fixing a Fault
. OPERATING NOTES
Graf UK Ltd
7OPERATING NOTES
Essentially, the system should only be supplied with materials that correspond to domestic wastewater in their
characteristics.
Biocides, materials with a toxic eect or materials that are not biologically compatible or degradable must not enter the
system, as these lead to biological process problems. The following, in particular, should not be introduced into the
system:
• Rainwater from roofs and courtyards,
• Extraneous water (e.g. drain water)
• Residues from livestock in solid or liquid form,
• Industrial or agricultural wastewater, as far as it is not comparable to domestic wastewater,
• Chemicals, pharmaceuticals , mineral oils, solvents,
• Cooling water,
• Coarse materials in the form of food scraps, plastics and hygiene products, face wipes, coee filter papers, bottle caps
and other household items,
• Milk and dairy products
• Drain water from swimming pools,
• Large amounts of blood.
In the case of large amounts of fats or vegetable oils, it is recommended that the fatty wastewater is pretreated in one of
the grease traps upstream of the wastewater treatment system (Caution: No faeces may be introduced into the grease
trap!).
. OPERATING NOTES
Graf UK Ltd
OPERATING NOTES
7
Solid or liquid substances that do not
belong in the sink or in the toilet:
What it does: Where it should go:
Ash Does not decompose Dustbin
Chemicals Contaminates wastewater District collection point
Disinfectants Kills bacteria Do not use
Paints Contaminates wastewater District collection point
Frying fat Accumulates in pipes and leads to blockages Dustbin
Adhesive plasters Clogs pipes Dustbin
Cigarette ends Accumulates in the system Dustbin
Condoms Causes blockages Dustbin
Corks Accumulates in the system Dustbin
Medication Contaminates wastewater Pharmacy
Engine oil Contaminates wastewater District collection point
Oily waste Contaminates wastewater District collection point
Plant protection products Contaminates wastewater District collection point
Paintbrush cleaner Contaminates wastewater District collection point
Cleaning agents, except those which are
chlorine-free (environmentally friendly)
Contaminates wastewater, corrodes pipes
and seals
District collection point
Razorblades Causes risk of injury for workers in sewers
and wastewater treatment systems
Dustbin
Drain cleaner Corrodes pipes and seals, contaminates
wastewater
District collection point
Pesticides Contaminates wastewater District collection point
Panty liners/Sanitary towels Leads to blockages, non-degradable plastic
film spoil water
Dustbin
Cooking oil Leads to deposits and pipe blockages District collection point
Food leftovers Leads to blockages, attracts rats Dustbin
Wallpaper paste Leads to blockages District collection point
Textiles (eg. nylon tights, cloths,
handkerchiefs, etc.)
Clogs pipelines, can cripple a pumping
station
Charity shop
Thinner Contaminates wastewater District collection point
Bird sand, cat litter Leads to deposits and pipe blockages Dustbin
Cotton buds/Face wipes Clogs the system Dustbin
Toilet blocks Contaminates wastewater Do not use
Nappies Clog pipes Dustbin
Cement water Creates deposits, becomes concrete Send to a specialist
company
The following is a list of individual substances which must not be disposed of via the wastewater treatment system:
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