Seko Maxima MPG User manual

Maxima MPG Cod. EM00136006 rev. 1.1 1
MAXIMA
MPG
Contents:
1 First of all 3
2 Installation 9
3 Setting and operation 12
4 Maintenance 32
5 Troubleshooting 33
6 How to contact us 34

Maxima MPG Cod. EM00136006 rev. 1.1 2
1 FIRST OF ALL
1.1 WELCOME
Thank you for buying a Seko product.
This dosage pump is made up of a control part that houses the electronics and the magnet and
a hydraulic part that is always in contact with the liquid to be dosed.
The parts that come into contact with the liquid are chosen to guarantee full compatibility with
most chemical products, normally used. Due to the variety of chemical products on the market,
we recommend checking chemical compatibility between the product dosed and the materials in
contact with it. The materials that make up the pump are listed in Paragraph 1.3.1, while all
membranes are made of PTFE.
Pay particular attention to the warnings and precautions indicated in this manual.
1.2 COMPOSITION OF THE SYSTEM
7
1
2
5
4
36
1 Control Panel
2 Head
3 Knob for adjusting the stroke
4 Delivery connector
5 Suction connector
6 Priming valve
7 Support for sides and base.

Maxima MPG Cod. EM00136006 rev. 1.1 3
1.3 PACK CONTENTS
MAXIMA MPG
Complete pump
Foot filter (Fig. 1)
Injection fitting(Fig. 2)
4 m of PVC hose (transparent and soft) for suction and for connecting
the bleeding valve up for manual priming (Fig. 3)
2 m of PE pipe (opaque and rigid) for connecting the pump’s outlet to
the injection point (Fig. 3)
Anchors for securing the pump.
Support for wall mounting (Fig. 4)
Instruction Manual
Fig. 1: Foot filter
Fig. 2: Injection fitting
Fig. 3: Hoses (suction, delivery,
bleeding)
Fig. 4: Support
Fig. 5: Fitting the support to the tank
Fig. 6: Fitting the pump onto the support

Maxima MPG Cod. EM00136006 rev. 1.1 4
WARNINGS
CAREFUL HANDLING, INSTALLATION AND COMMISSIONING OF THE PUMP HELPS TO
PROVIDE A TROUBLE-FREE INSTALLATION.
 READ THE FOLLOWING WARNINGS BEFORE PROCEEDING TO INSTALL OR DO
MAINTENANCE WORK ON THE PUMP.
− All our pumps are tested using water. To dose chemical products that may react with the water (e.g.
H2SO4= Sulphuric Acid) all the internal parts of the hydraulic section must be dried. To do
so:
a Switch the power to the pump on and run it at maximum frequency with the delivery valve facing
downwards.
b After it has run for a few minutes check that no more water is coming out.
− Install the pump in a place where the temperature does not exceed 40°C and the relative humidity is
below 90%. This pump has a protection level of IP65 and so can be installed outdoors. This pump
must never be immersed in liquid. To prevent overheating do not install the pump in direct sunlight.
− Install the pump in such a way that inspection and maintenance are easy, and then secure the pump
well to prevent vibrations.
− Check that the power supply voltage fed to the plant is as indicated in the label on the pump.
 WARNING: BEFORE DOING ANY WORK ON THE PUMP, ALWAYS FIRST DISCONNECT
THE POWER SUPPLY CABLE.
− When handling the pump after it has been used to dose chemical products, remember to use
protective clothing and gloves and to provide suitable protection for your eyes.
− If you are dosing using pressurised piping, before starting the pump always check that the pressure in
the plant does not exceed the maximum working pressure shown on the dosage pump label.

Maxima MPG Cod. EM00136006 rev. 1.1 5
1.4 TECHNICAL CHARACTERISTICS
 Check the main characteristics of you pump on the plate.
MAXIMA 240 Spm
Type bar lit/h Gph Psi
10 8.5 2.25 145
6 9.8 2.59 87
2 11 2.91 29
MPG912
230VAC
50/60 Hz
40 W
Fuse 2 A L
Code MPG912ASC0M00 Serial N°
XXXXXX
Your pump is one of the family of pumps listed in the table below:
Pressure
Flow Rate Connections
(mm)
Weight
Model
bar lit/h
cc/stroke
IN / OUT
Strokes/min
kg
10 1.80 0.13
6 2.00 0.14
611 3 2.20 0.15 4 / 6 240 1,7
7 5 0.35
4 5.5 0.38
612 1 8.4 0.58 4 / 6 240 1,7
18 4.5 0.31
16 5 0.35
911 11 5.6 0.39 4 / 6 240 3,1
10 8.5 0.59
6 9.8 0.68
912 2 11 0.76 4 / 6 240 3,1
5 15 1.39
4 18 1.67
913 3 20 1.85 8 / 12 180 3,2
2 35 2.43
1 44 3.06
914 0 63 4.38 8 / 12 240 3,2

Maxima MPG Cod. EM00136006 rev. 1.1 6
1.5 WARNINGS
 Check the model of the equipment bought, when using the dosage calibration
references indicated in this manual.
 ATTENTION – Stroke adjustment
The knob must not be rotated when the pump is not working; otherwise the adjustment
shaft could become deformed thus causing a flow rate loss.
 WARNING: Always follow the necessary safety procedures, including the use of
adequate protection for the eyes, face, hands, and clothing.
 WARNING: When installing or carrying out maintenance on this equipment, always
disconnect it from the power supply.
Seko is constantly striving to perfect all its products, and we therefore reserve the right to
make changes at any time without notice.
Failure to abide by the standards laid down in this manual could result in damage to
property or people, as well as damaging the equipment or compromising its operation.

Maxima MPG Cod. EM00136006 rev. 1.1 7
2 INSTALLATION
 WARNING: Before proceeding to install the pump, read all the paragraphs referring to it carefully.
This pump must be installed in a position that makes connecting it to the chemical product tank and
the injection point easy.
This pump has a protection level of IP65 and so can be used outdoors. This pump must never be
installed in positions in which it may be submerged. It must also not be installed where the
temperature exceeds 40°C for long periods of time.
2.1 RECOMMENDED INSTALLATION LAYOUTS
Fig. 7: Wall-mounted with bracket Fig. 8: On the tank with a support
Fig. 9: Under a head with a
support
Fig. 10: On a meter

Maxima MPG Cod. EM00136006 rev. 1.1 8
2.2 OVERALL DIMENSIONS AND DRILLING TEMPLATE
Fig. 11: Overall dimensions – 610 series
Fig. 12: Overall dimensions – 910 series
Fig. 14: Drilling template for 610 series
Fig. 13: Drilling template for support
Fig. 15: Drilling template for 910 series

Maxima MPG Cod. EM00136006 rev. 1.1 9
2.3 PLUMBING CONNECTIONS
2
4
6
6
4
8
11
4
6
6
4
13
1
3
5
7
5
3
9
10
3
5
12
5
3
1) Injection point
2) Injection fitting
3) PVDF gasket
4) Washer holder
5) Pipe clamp
6) Ring nut
7) Delivery pipe (opaque and rigid)
8) Delivery fitting
9) Pump casing
10) Manual bleeding valve
11) Suction coupling
12) Suction hose (soft and transparent)
13) Foot filter
When forming the plumbing connections, follow these instructions:
− The FOOT FILTER must be installed in such a way that it is always 5-10 cm from the bottom to prevent any
deposits clogging it and damaging the hydraulic part of the pump.
− Installing the pump under a head is always best and is recommended for pumps with a very low flow rate as it
solves all priming problems. Installation under a head is specifically recommended when dosing
sodium hypochlorite (NaOCl) and hydrazine (N2H2) or any other product that tends to develop gas.
− Pumps are supplied standard with entry and exit pipes that are sized to suit the pump’s hydraulic
characteristics. Should you need to use longer pipes, it is important to use pipes with the same internal and
outside diameter as those supplied with the pump.
− For outdoor applications, where the DELIVERY PIPE may be exposed to direct sunlight, we recommend
using black piping that is resistant to ultraviolet rays.
− It is advisable to position the INJECTION POINT towards the top of the pump or the tank. In all cases, to
guarantee the pump’s performance, always use the INJECTION VALVE supplied with the pump.
− THE INJECTION VALVE MUST ALWAYS BE INSTALLED AT THE END OF THE DELIVERY LINE FOR
THE DOSAGE FLOW.

Maxima MPG Cod. EM00136006 rev. 1.1 10
2.4 ELECTRICAL CONNECTIONS
The pump must be connected to a power supply that is as indicate don the label on the side of
the pump. Failure to respect the limits indicated may result in the pump being damaged.
The MAXIMA range of pumps do not need to be earthed as they are made using components
and technology that ensures that all electronic components are double insulated.
The pumps are designed to absorb small extra voltages, but to avoid the pump being damaged
it is always preferable to avoid using a power supply in common with electrical equipment that
generates other voltages.
The connection with the 380V three-phase line is formed exclusively between phase and
neutral. No phase-earth connections are to be formed. (Fig. 16 and Fig 17)
N
380V
T
230V
RS
Fig. 16: CORRECT CONNECTION
N
T
T
RS
380V
230V
Fig. 17: WRONG CONNECTION

Maxima MPG Cod. EM00136006 rev. 1.1 11
3 SETTING AND OPERATION
3.1 GENERAL DESCRIPTION
Fig. 18: Display
MPG
Fig. 19: Control Panel
DISPLAY (icon lit)
Icon Pump Functions
Level The level sensor has detected that the liquid has fallen below the preset level.
Flow Flow Alarm Enabled
Pause Pump paused
Stop Pump stopped
Memory Memory Function Active
0 / 4 …20 Pump in direct 0/4…20 mA mode
20…4 / 0 Pump in inverse 20…4/0 mA mode
% Flow Rate shown in %
C Pump in constant mode
n : 1 Pump in n:1 proportional mode
1 : n Pump in 1:n proportional mode
1 : c Pump in 1:c manual mode
ml/min Flow Rate shown in ml/min
KEYBOARD
Key Pump Functions
Prog Key for selecting Operating Mode
Start/Stop Pump On/Off Switch
Mode Regulation and flow rate display key
Cal Change the dosage calibration parameters
▲and▼Change the parameters shown on the display

Maxima MPG Cod. EM00136006 rev. 1.1 12
9
14
13
12
11
10
1
6
2
5
4
3
78
Fig. 20: Connection Diagram
POWER SUPPLY
1 Phase
2 Neutral
ALARM REPETITION OUTPUT RELAY
3 Normally Open (NO) NO = PIN 3 + PIN 4
4 Common
5 Normally Closed (NC) NC = PIN 4 + PIN 5
PAUSE AND FLOW CONTROL
6Pause PAUSE = PIN 6 + PIN 8
7Flow Control FLOW CONTROL = PIN 7 + PIN 8
8GND
LEVEL SENSOR
8GND Level alarm with pump cut-out = PIN 8 + PIN 9
9Lev
10 Pre-alarm
Level alarm without pump cut-out = PIN 8 + PIN 10
EXTERNAL SIGNAL INPUT
11 GND FREQUENCY SIGNAL = PIN 11 + PIN 12
12 Frequency signal input CURRENT SIGNAL = PIN 11 (-pole) and PIN 13 (+pole)
13 Current signal input
14 NOT USED
 WARNING: The level and frequency contacts ONLY accept voltage-free signals.

Maxima MPG Cod. EM00136006 rev. 1.1 13
The Maxima MPG is designed to operate in various modes (C, n:1, 1:n, 1:c, 0/4…20, 20…/0/4). Passage from
one to the other takes place after holding down the Prog key for three seconds, as shown in the layout shown,
using the ▲and ▼keys.
Cn:1 1:n 0/4..20
1:c 20..4/0
Fig. 21: Main Programming Menu
Once you have accessed programming and selected the required mode, to exit programming and return to
operating mode, hold the Prog key down for three seconds.
Entry into programming mode is highlighted by the flashing STOP icon.
You can exit programming at any time by holding the Prog key down for three seconds.
The modes available include:
Icon Display Mode Paragraph
C C Constant 3.2.1
n:1 F n 1 Division 3.2.2
1:n F 1 n Multiplication 3.2.3
1:c F 1 c Manual 3.2.4
0/4..20 I Direct current 3.2.5
20..4/0 I Inverse current 3.2.6
For a better understanding of the Maxima MPG functions and programming, we recommend referring to the
Main Programming Menu shown in Fig. 21 and Figs 18 and 19, showing the display and the control panel
respectively.

Maxima MPG Cod. EM00136006 rev. 1.1 14
3.1.1 Displaying the flow rate
The flow rate can be displayed in three formats: Percentage (P), Frequency (F), ml/min.
To switch from one format to another hold the Mode key down for three seconds, to move from one to another
as per the block diagram below.
PF
ml/min
Mode
Fig. 22: Changing the Display

Percentage Mode
The letter Pappears on the Display followed by a number that indicates the percentage of the maximum flow
rate. In this format the %icon is lit.
To adjust the flow rate hold the Mode pushbutton and the ▲or ▼keys down together to increase or
decrease the flow rate value respectively.
This value can vary from 100 (corresponding to 100% of the max frequency) to 1% (corresponding to 2
imp/min).
 Frequency Mode
The letter Fappears on the display, as well as the number of impulses per minute set. F 160 means that the
pump doses at a frequency of 160 impulses per minute.
The frequency varies from the maximum value to a minimum of 1 imp/min (minimum flow rate).
To adjust the flow rate hold the Mode pushbutton and the ▲or ▼keys down together to increase or
decrease the working frequency value respectively.
 ml/min Mode
The display shows the flow rate expressed in ml/min and the icon is lit.
The flow rate is changed by pushing the Mode pushbutton and the ▲or ▼keys together. The change in the
value depends on the model of the pump as well as the calibration of the pump (see Par. 3.3 "Calibration
Procedure”).
NOTE: Adjustment is possible both with the pump stopped, STOP icon lit, and during dosing.
These three display modes are not always available, depending on the operating mode set.

Maxima MPG Cod. EM00136006 rev. 1.1 15
3.1.2 Factory settings
A new pump from the factory is set as follows:
Operating Mode Constant
Flow Rate Display Percentage (100%)
Working Frequency Maximum (240)
Stroke Maximum
Operation STOP
Icons “lit” STOP Cand %
3.1.3 Priming
The priming function is useful for speeding up installation of the pump as it makes the pump work at maximum
frequency, independently of the parameter settings.
Priming can be activated both when the pump is running and when the pump is stopped (STOP icon lit).
Activate the pump by pushing the START/STOP button (STOP icon off). Press the ▲and ▼keys together.
The pump starts at maximum frequency. The display reads: P100, F240 o XX.X (value taken from calibration).
When the ▲and ▼keys are released the pump goes back to its previous state.
3.1.4 Adjusting the flow rate
The flow rate can be adjusted in two ways:
− By adjusting the operating frequency setting.
− By adjusting the stroke using the relevant knob of the front.
Fine tuning of dosing can be obtained by combining these two settings. By adjusting the stroke you
can set the pump to maximum flow rate, which can be refined by adjusting the operating frequency.
It is advisable to set the stroke % at above 30%.

Maxima MPG Cod. EM00136006 rev. 1.1 16
3.1.5 Checking the level of the liquid to be dosed
A level sensor can be used to check the level of the liquid to be dosed.
Two operating modes are available:
14) Level alarm with pump cut-out: Level sensor connected to pins n° 8 and 9 (see CONNECTION
LAYOUT). When the liquid reaches the required level the pump cuts out (pump stopped and Stop icon
lit). The Level icon and Alarm LED switch on, on the Display. Once the liquid level is corrected the
Level icon and Alarm LED switch off and the pump starts working again (Stop icon off).
Level alarm without pump cut-out: level sensor connected to pins 8 and 10 (see CONNECTIONS LAYOUT).
When the liquid reaches the required level the pump does not cut out. The Level icon switches on, on the
Display and the Alarm LED starts flashing. Once the liquid level is corrected, the Level icon and Alarm LED
switch off.
3.1.6 Flow Control
The Flow Control function is used to provide control over the correct dosage by the pump and can be enabled
in all operating modes.
The flow sensor is connected to PINS 7 and 8 on the pump, which gives an impulse each time the pressure
detected at the pump’s intake varies. The software controls the relationship between the number of strokes made
by the pump and the number of impulses picked up by the flow sensor. After 8 consecutive strokes by the pump
for which there is no corresponding impulse by the flow sensor the pump stops, the STOP icon and the Alarm
LED switch on.
When programming the functions, for each operating mode there is a step, indicated by the Flow icon flashing
that allows you to enable Flow Control. In display mode, the Flow icon stays lit while Flow Control is enabled.

WARNING: Enabling Flow Control without connecting up the contacts causes the
pump to stop after its first 8 dosing strokes.

Maxima MPG Cod. EM00136006 rev. 1.1 17
3.2 OPERATING MODE
This paragraph describes the various operating modes available on the Maxima MPG. For changing from
one mode to another, see the instructions in Paragraph 3.1.
3.2.1 Constant Mode
In this mode the pump provides constant, continuous dosing at the flow rate set.
During operation, to select CONSTANT mode, push the Prog key and hold it down. PrG appears on the
screen for a few seconds, and then the main programming menu will open (STOP icon flashing). Push the ▲
and ▼keys until the letter C appears on the screen, with the Cicon flashing.
 Setting parameters from the C menu.
From the main programming menu, when the Prog key is pressed the Cicon stays lit and a specific menu
opens, as per the diagram shown below.
Prog
C
Flow
on/off
Fig. 23: Constant Mode Menu
In this mode the flow control function can be activated as follows: Access programming by holding the Prog key
down for three seconds. PrG appears on the screen for a few seconds, and when you enter programming the
pump is forced to stop and the Cand STOP icons flash. Push the Prog key again to access a sub-menu (Cicon
lit and STOP and Flow icons flashing). Flow control can then be selected using the ▲or ▼keys. When Flow
Control is active, the display reads ON, when it is inactive, the display reads OFF.
To exit programming hold the Prog key down for three seconds.
 WARNING: The pump may stop automatically due to a pump cut-out signal emitted by the
level sensor (Level icon and Alarm LED lit), see par. 3.1.5 “Checking the level of the liquid
to be dosed”.

Maxima MPG Cod. EM00136006 rev. 1.1 18
 Displaying and Operation
When operating in CONSTANT mode the display shows the flow rate set.
This can be displayed in three ways (P, F, ml/min) as explained in Paragraph 3.1.1.
The Cicon is lit. When displayed as a percentage the %icon is also lit. The STOP icon must be off while the
pump is running.
The pump is activated and stopped manually using the START/STOP button (the Stop icon is off or on
respectively).
To adjust the flow rate hold the Mode pushbutton and the ▲or ▼keys down together to increase or decrease
the flow rate value respectively.
3.2.2 n:1 proportional mode (Division Mode)
In this mode the pump doses one stroke every n impulses received, where n is a number that can be set by the
operator.
To select n:1 DIVISION mode, push the Prog key and hold it down. appears on the screen for a few seconds,
and then the main programming menu will open (STOP icon flashing). Push the ▲and ▼keys until Fn1
appears on the screen, with the n:1 icon flashing.
 Setting parameters from the n:1 menu.
From the main programming menu, when the Prog key is pressed the n:1 icon stays lit and a specific menu
opens, as per the diagram shown below.
To exit programming and save the parameters set at any time, hold the Prog key down for three seconds.
Fig. 24: n:1 division mode menu
Fn
1
Prog
n
Prog
Prog
1..9999
Prog
Memor
y
on/of
f
Flow
on/of
f
Press
the key
Press the
key
Press
the key
Press
the key
Press
the
k
Press
the keys
Press
the keys

Maxima MPG Cod. EM00136006 rev. 1.1 19
− Selecting Impulses (See Fig. 24)
The number ndisplayed represents the number of external impulses required for the pump to dose one stroke.
This value can be changed between 1 and 9999 using the ▲or ▼keys.
For Example: If I have connected my pump to a CB1 series plunger impulse counter (1 imp/l) and have selected
N=8, this means that every 8 impulses on the counter my pump will give one stroke, that is, for every 8 litres of
water that pass the counter the pump will dose one stroke.
The set value is confirmed by pressing the Prog key and the programming moves on to selecting the Memory
function.
− Memory Function (see Fig. 24)
The software continually monitors the arrival of external impulses. When these are at high frequency and the
pump is not able to dose all the corresponding strokes the “missed” strokes can be recorded, up to a maximum of
65,535, so as to dose these as soon as possible.
 Memory Function OFF (Memory icon off).
The pump does not record missed strokes. The under dosage situation is indicated. A message
reading ALL2 appears on the screen and disappears as soon as the under dosing situation is
resolved.
 Memory Function ON (Memory icon lit).
As soon as the pump starts recording excess strokes the Memory icon flashes until the
recorded strokes have been completed.
If the memory is exceeded (more than 65,535 strokes recorded) the Alarm LED also
switches on and the alarm repetition relay is activated.

WARNING: The recorded strokes are deleted under the following conditions:
 Switching the dosage pump off.
 Entering programming.
 Carrying out the priming procedure (pushing the ▲and ▼keys together).
 Activating the level alarm with pump cut-out.
 Activating the Flow Alarm.
 The pump temperature exceeds the safety limit and the pump goes into self-
protect mode (when the temperature falls below the threshold the pump
restarts with the memory zeroed).
 WARNING: The pump may stop automatically due to a pump cut-out signal emitted by
the level sensor (Level icon and Alarm LED lit), see par. 3.1.4 “Checking the level of the
liquid to be dosed”.
The status set can be confirmed by pressing the Prog key, which also enables selecting the Flow function.
− Flow Control Function (see Fig. 24)
This can be enabled by pushing the ▲or ▼keys, and stored in the memory by pushing the Prog key.

Maxima MPG Cod. EM00136006 rev. 1.1 20
 Displaying and Operation
On exiting programming the 100% default value will be displayed (%icon lit).
The number displayed shows the percentage flow for each stroke dosed by the pump, for every n external signals
received.
The n:1 and %icons are on and the STOP icon must be off while the pump is running.
The value displayed can be edited (between 100% and 1%) by pushing the Mode key and the ▲or ▼keys
together.
The settings return to their default values each time the setting for the number of impulses is changed on entering
programming. If this parameter is not edited the previous settings are reinstated.
EXAMPLE: setting n = 4
With n=4, if the pump is working at 100% it doses 1 stroke for every 4 external signals received.
If the percentage is set at 80% the pump doses 1 stroke every 5 external signals received (the flow rate will
be 80% of the initial flow rate).
If the percentage is set at 50% the pump doses 1 stroke every 8 external signals received (the flow rate will
be 50% of the initial flow rate).