Emec LOTUS MINI User manual

Chlorine Dioxide Generator
LOTUS MINI
Operation Manual
Read this manual completely before you start LOTUS.
Do not trash this manual and store it nearby the generator for later use.
This manual contains important information about the installation and operation safety.
Take care about the following instructions to avoid personal injuries and material damages!
The operator is responsible in case of damages caused by installation and operation failures!
English
R5-02-16
DOWNLOAD ERMES COMMUNICATION SOFTWARE
www.ermes-server.com

2
NORME CE
EC RULES(STANDARD EC)
NORMAS DE LA CE
Direttiva Bassa Tensione
Low Voltage Directive
Directiva de baja tensión
Direttiva EMC Compatibilità Elettromagnetica
EMC electromagnetic compatibility directive
EMC directiva de compatibilidad electromagnética
2014/35/UE
2014/30/UE
⎬
⎬
Danger!
GENERAL SAFETY GUIDELINES
In emergencies the instrument should be switched off immediately! Disconnect the power cable
from the power supply!
When installing always observe local regulations!
Manufacturer is not liable for any unauthorized use or misuse of this product that may cause injury,
damage to persons and / or materials.
Caution! Instrument must be accessible at all times for both operating and servicing. Access must not be
obstructed in any way!
Feeder should be interlocked with a no-flow protection device to automatically shut-off the pumps
when there is no flow!
Pumps and accessories must be serviced and repaired by qualified and authorized personnel only!
Always discharge the liquid end before servicing the instrument!
Empty and rinse the liquid end before work on a pump which has been used with hazardous or
unknown chemicals!
Always read chemical safety datasheet!
Always wear protective clothing when handling hazardous or unknown chemicals!
Instrument must be operated / serviced by trained technicians only!
All connection operations must be performed while the instrument is not connected to main
supply!

3
Directory
1.
General Safety Guidelines
4
1.1
Symbols
4
1.2
Safety instructions
4
1.3
CE-Conformity
5
2.
General Description
6
3.
Construction
7
3.1
Construction overview
7
3.2
Description and details
7
4.
„LOTUS“ - Controller
8
4.1
Start display
8
4.2
Main display
8
4.3
Control element „Click-Wheel“
8
4.4
Status displays
9
4.5
Logbook
10
4.6
Help
10
5.
Adjustment of production capacity
11
5.1
Proportional mode
12
5.2
Constant mode
13
5.3
Analog mode
13
5.4
Batch mode
14
6.
Replacement of chemical cans and pump priming
15
7.
LOTUS Terminal board
16
8.
Technical Data
17
9.
18
Failure Messages
Communication 21
NOTE:
WHEN CHANGING WORKING MODE, SETPOINT PARAMETERS SHOULD BE ENTERED
AGAIN.

4
1. General Safety Guidelines
1.1 General remarks
This manual includes basic directions for the assembling, operation and maintenance. Therefore it is obligatory
for the assembly technician as well as for the operator to study the complete manual before starting with the
installation and start-up. This manual must be present at the generator at any time.
It is also obligatory for the operator to consider the general directions in chapter “Safety instructions” as well as
the specific safety instructions included in the other chapters of this manual.
Notice:
•For some of the following described functions additional accessories (not included in the delivery
scope of LOTUS) may be required.
•Depending to the software release of the LOTUS-controller some of the described features may
not be available. Or some functions are available, but not described in this manual. Please contact
your dealer in case of the requirement for more information.
1.2 Symbols
In accordance to the guideline DIN 4844-W9 about the characterization of special risks all safety instructions in
this manual are labeled with the following symbols:
Warning:
This symbol is waring about risks.
Disregarding may cause heavy personal injuries and material damages.
Caution!
This symbol is warning about troubles caused by incorrect operation.
Notice or advice:
This symbol shows important additional information.
1.3 Safety instructions
The appropriate use of the LOTUS generator is described in this manual.
Warning:
•The un-appropriate use affects the safety function of this generator and other connected devices
and is therefore strictly forbidden.
•Assembling and maintenance has to be done by authorized technicians only.
•Maintenance repairs have to be executed only by the manufacturer or authorized technicians. Inter-
ventions or changes at the device in opposite to the regular maintenance in accordance to this
manual are incorrect and make the all warranty claims nugatory.
•The operator is liable for the observance of the local safety instructions.
•For the operation and service the device must be accessible at all times.
•Before starting service at the dosing pumps make the pump-heads pressure-less.
Warning: risk of explosion

•Drain and flush the pump-heads with clean water before starting the service.
•Take attention to the chemical safety data sheets!
•Wear protection clothes for the handling with unknown and hazardous chemicals.
HCl 9% NaClO2 7,5%
PEF1/E
Probe
holder
ECL1
Chlorine probe
MF
Multivalve
Pulse sender water meter
WARNING: INSTALL NFIL/60 BEFORE WATER INPUT TO AVOID OCCLUSIONS

6
Directions for the operator
(Specific information for applicable regulations in Germany):
•Accident prevention regulation (UVV) „Chlorination of water“, GUV V-D5 E.
•„Dosing plants for chlorine dioxide“, DVGW guideline W 624 (latest version respectively).
•„Chlorine dioxide in water treatment“, DVGW worksheet W 224 (latest version respectively).
•Guidelines for the protection of groundwater against polution.
(§ 19 Federal Water Act – WHG dated 23.9.1986).
•Ordinance of hazardous substances (GefStoffV) – especially § 17 (obligatory protection)
and § 20 (operation instruction).
1.4 CE - Conformity
The LOTUS generator is corresponding to the following EU-standards:
The following standards are considered:
•Machinery directive 89/392/EWG IIA inclusive all actual changes within the year of
Manufacturing 91/368/EWG – Mod. 1, and 93/44/EWG – Mod. 2.
•Guideline 2004/108 EG about the electromagnetic tolerance of electric equipment.
•Low-voltage directive 2006/95/EG.
•EC – Pressure Equipment Directive (97/23/EG)
The following harmonized safety guidelines are considered:
•UNI EN 292/1 – Safety of machines
•UNI EN 292/2 – Safety of machines; technical principles.
•CEI EN 60204-1-98 – General requirements for electric equipment in machines.
Notice:
A declaration of conformity can be ordered from the manufacturer.

7
2. General Description
The chlorine dioxide generator is used for the production of liquid chlorine dioxide. This disinfection agent kills
all bacteria, germs, viruses and fungi within shortest time – and it works with very low concentration.
The generator is working with the hydrochloric acid – chlorite process and uses diluted chemicals like hydro-
chloric acid (HCl 9%) and sodium chlorite (NaClO27.5%) in accordance to the following chemical equation:
Hydrochloric acid + Sodium Chlorite = Chlorine dioxide + Sodium chloride + Water
4 HCl + 5 NaClO2= 4 ClO2+ 5 NaCl + 2 H2O
In the process each chemical is pumped with a specific proportion into a chamber vessel [ 5 ] by two dosing
pumps [ 2 and 4 ]. Each stroke from each pump is triggered by the LOTUS-controller [ 1 ] and counter-
controlled by a “SEFL” [ 6 ].
Inside the chamber vessel the chemicals are reacting to chlorine dioxide with a concentration of 2% (= 20 g/l).
In the next step a specific proportion of water is pumped into the chamber by a third dosing pump [ 3 ] to dilute
the chlorine dioxide down to a concentration of approx. 2 g/l.
The finished chlorine dioxide leaves the chamber vessel through a back pressure valve [ 7 ] on the top of the
chamber.
The advantages are:
•The chlorine dioxide can be pumped direct into pressurized systems with the pressure of the pumps and
likewise into pressure-less storing tanks, to distribute the disinfection to different points of use.
•The System can work in proportional mode with contact water meter, current signal or chlorine dioxide
measurement.
2 3 4
1
5
6
7

8
3. Construction
3.1 Construction overview
3.2 Description and details
1 LOTUS-controller 10 Drain nozzle ½“
2 Dosing pump for hydrochloric acid (HCl 9%) 11 Level switch „Dilution water tank empty“
3 Dosing pump for dilution water 12 Can with hydrochloric acid 9 % (ca. 95 g/l)
4 Dosing pump for sodium chlorite (NaClO2 7,5%) 13 Suction lance with level-switch „Hydrochloric acid“
5 Chamber 14 Can with sodium chlorite 7,5 % (ca. 80 g/l)
6 Dosing control “SEFL” 15 Suction lance with level-switch „Sodium chlorite“
each for hydrochloric acid, sodium chlorite
and dilution water
7 PVDF check-valve with hose-connection 4x6 mm
8 Storage tank for dilution water
(located behind the dosing pumps)
9 Floating valve
A Hose-connection 4x6 mm for dilution water
B Hose-connection 4x6 mm for chlorine dioxide (for PVDF hose)
C Dilution water storage tank overflow
4
HCl 9%
NaClO27,5%
8
10
9
11
C
12
13
14
15
A A
3
2
5
7
B
6
8
4

9
4. „LOTUS“Controller
4.1 Start display
When the power supply is switched on the start display appears and shows the actual software release for
some seconds.
After approx. 3 seconds the program goes onto the main display.
4.2 Main display
The main display is separated into 5 lines::
1: Date and time
2: Measuring value for temperature (in case this option is implemented)
3: Type of plant
4: Information line for operation, status or failure messages (blinking)
5: “Click-Wheel” operation and duty line.
A constant running bar shows that LOTUS is active.
4.3 Control element „Click-Wheel“
On the right side of the display a turning- and push-button is located. It is called „Click-Wheel“.
You can turn the click-wheel into both directions to scroll through the menus or select a function. The selected
function is shown in an inverse color.
The actual position is shown .
Push the click-wheel for selection.
Inverse
LOTUS
Rel: x.x.x
1
2
3
4
5
02-12-10 EMEC 09:10:55
LOTUS 25.9° C
Chlorine Dioxide Generator
Stand-by
Status Menu Logbook Help
Status
02-12-10 EMEC 09:10:55
LOTUS 25.9° C
Chlorine Dioxide Generator
Stand-by
Status Menu Logbook Help
Status
Turn for scroll
Push for selection

10
4.4 Status Displays
Push the click-wheel on “Status” to open 4 different operation displays:
Check: The signal lights are showing the function of the dosing controls.
At stagnant production the signal light shows .
During production the signal lights from the dosing controls “Check” are blinking inverse
corresponding to the signals from the „Pump“.
That means: in the moment when a pump is doing a stroke
(light = ), the light of the dosing control has to show .
Pump: See also „Check“.
Mode: Shows the activated operation mode.
Production: Shows the actual chlorine dioxide production capacity.
Water Meter: Shows the actual flow capacity of the contact water meter.
Next Service: Shows the remaining time until the next service is required.
Operating hours: Shows the operating hours counter.
In the operation displays you have different options:
ON/OFF Start/Stop LOTUS
STAND-BY Switches LOTUS into the “Stand-by” mode,
independent to the function of the “Stand-by” – Input
PRIMING Opens the display for dosing pumps priming resp. for manual mode
ESC Go back to the main display
<or > Scroll in the operation displays
Status LOTUS
Production [g/h] : 4.25 Mode:
Water Meter [m³/h]: 42.5 Proportional
< ESC >
On
Totalizer
Acid [ltr.] : 9123.5 Mode:
Chlorite [ltr.]: 9124.9 Proportional
Water Meter [m³]: 99999.9
< ESC
On
Status LOTUS
Next Service in [h]: 4375 Mode:
Operating hours [h]: 9999999 Proportional
< ESC >
On
02-12-10 EMEC 09:10:55
LOTUS 25.9° C
Chlorine Dioxide Generator
Stand-by
Status Menu Logbook Help
Status
Status LOTUS
Check : Mode:
Pump : Proportional
Acid Water Chlorite
ON Stand-by Priming ESC >

11
4.5 Logbook
Turn the click-wheel onto the field “Logbook” and push it to open the sub-menu.
The LOTUS-controller has an internal logbook-memory. Two different types of data are stored together with a
time-stamp: Operation data in periodic intervals and failure messages as soon as they appear.
Turn the click-wheel to scroll forward and backwards through the logbook.
Push the click-wheel on “ESC” for return to the main display.
4.6 Help
Turn the click-wheel onto the field “Help” and push it to open the “Help” display.
The “Help” display shows the contact data of your dealer.
Push the click-wheel on “ESC” for the return to the main display.
Logbook
˄
07-12-10 23:59:59 Mode: Proportional
Acid:109.0 l Chlorite: 109.7 l Water: 298.6 m³
˅
ESC
Logbook
˄
07-12-10 12:35:55 Failure level acid
07-12-10 13:10:20 Restart
˅
ESC
LOTUS
LIQUID Water Treatment
Phone: [phone]
ESC
02-12-10 EMEC 09:10:55
LOTUS 25.9° C
Chlorine Dioxide Generator
Stand-by
Status Menu Logbook Help
Logbook
02-12-10 EMEC 09:10:55
LOTUS 25.9° C
Chlorine Dioxide Generator
Stand-by
Status Menu Logbook Help
Help

12
5. Adjustment of production capacity
Depending to the operation mode the production capacity of LOTUS can be changed.
Push the click-wheel “Menu” to open the display for the adjustment of the production capacity.
The access is protected by an operator passcode:
Select a four-digit number-code. As soon as the fourth correct digit is selected the next display opens automat-
ically.
Notice:
The factory default for the operator passcode is “0 0 0 0”.
In case you like to change your passcode please ask your dealer and his technician will do the
implementation for you.
Depending to the selected operation mode, different displays are available:
Passcode
0 1 2 3 4 5 6 7 8 9 ESC
Enter Passcode
* * * *
0
02-12-10 EMEC 09:10:55
LOTUS 25.9° C
Chlorine Dioxide Generator
Stand-by
Status Menu Logbook Help
Menu

13
5.1 Proportional mode
In the proportional mode LOTUS produces an adjustable capacity of chlorine dioxide proportional to a water
flow recorded by a water meter.
Prod. Capacity:Here you can adjust the requested chlorine dioxide concentration.
Warning:
•The controller takes the inserted value in “Prod. Capacity” for the calculation of the required stroke
frequency of the dosing pumps for the production of chlorine dioxide proportional to the flow. This
means that it is a theoretically value and not the real concentration in the water!
•The operator is responsible by its own for the proper adjustment of this control-value!
•The operator has to countercheck the chlorine dioxide concentration in the connected water system
with a suitable photometer to verify the real concentration and to readjust the “Prod. Capacity” until
the required concentration is stable achieved.
General Notices:
Theoretically it is possible to adjust the production capacity up to 9.99 mg/l.
But for very low water flows, resp. water consumption it can be dangerous to do this and
should be absolutely avoided!
In case the water flow exceeds the maximum production capacity a proportional production is not
longer possible. In the following table you can find the maximum water flow corresponding to the
maximum production capacity:
LOTUS
8
20
Production capacity
[mg/l]
Water flow
[m³/h]
0,10
80
200
0,20
40
100
0,30
26.6
66.6
0,40
20
50
0,50
16
40
0,60
13.3
33.3
0,70
11.4
28.5
0,80
10
25
0,90
8.8
22.2
1,00
8
20
The overriding of the maximum possible production capacity caused by the water flow is shown on the display
with a special blinking message “Overflow”:
As soon as the water flow drops down under the maximum acceptable value, the message disappears.
Proportional Mode
Prod. Capacity: 0.15 mg/l Mode:
Proportional
ESC
02-12-10 EMEC 09:10:55
LOTUS 25.9° C
Chlorine Dioxide Generator
Overflow
Status Menu Logbook Help

14
5.2 Constant mode
In this mode LOTUS is producing chlorine dioxide with a constant and adjustable capacity as long as input
“Stand-by” is not activated. Two different capacities can be adjusted depending to the digital inputs “Batch tank
empty” [terminal 34 and 35] and “Stand-by” [terminal 44 and 45].
Capacity 1: Here you can adjust the production capacity for the digital input “Batch tank empty”.
Capacity 2: Here you can adjust the production capacity for the digital input “Stand-by”.
Situation
STAND-BY (44, 45)
BATCH TANK EMPTY (34, 35)
LOTUS “STAND-BY”
Capacity 1
Capacity 2
5.3 Analog mode
In this mode the chlorine dioxide production capacity is controlled by an external analog signal (0/4 – 20 mA).
Capacity at 20 mA: Here you adjust the maximum production capacity for a 20 mA input signal.
Notice:
Independent to the selected operation mode LOTUS stops as soon as the digital input “Stand-
by” appears!
Constant Mode
Capacity 1: 50 %
Capacity 2: 100 %
ESC
Analog Mode
Capacity at 20 mA: 100 %
ESC

15
5.4 Batch mode
In this mode LOTUS fills up a level-controlled batch tank with chlorine dioxide in an adjustable concentration.
The two digital inputs “Batch tank empty” [terminal 34 and 35] and “Stand-by” [terminal 44 and 45] are used for
the level-control.
Because LOTUS runs always wit 100% production capacity as soon as it starts, no extra display for the capaci-
ty adjustment is available.
Situation
Step
Terminal
34, 35
Level tank
empty
Terminal
44, 45
Level
tank full
Tank empty
1
Level is rising
2
Tank full
3
Level falls down
4
Tank empty
1
Step 1: Step 2:
Step 3: Step 4:
In case one of the level-switch failed or the cable is damaged a failure message appears:
Failure Level-switch:
Status
Level Tank full : Mode:
Level Tank empty : Batch
Filling Batch Tank
< ESC >
Status
Level Tank full : Mode:
Level Tank empty : Batch
Start Filling Batch Tank
< ESC >
Status
Level Tank full : Mode:
Level Tank empty : Batch
Batch Tank full
< ESC >
Status
Level Tank full : Mode:
Level Tank empty : Batch
Draining Batch Tank
< ESC >
Status
Level Tank full : Mode:
Level Tank empty : Batch
Failure Level-Switch
< ESC >
02-12-10 EMEC 09:10:55
LOTUS 25.9° C
Chlorine Dioxide Generator
Failure Level-Switch
Status Menu Logbook Help
Status

16
6. Replacement of chemical cans and pump priming
Warning:
Wear protective clothes for the handling with hazardous chemicals!
•Replace the chemical can.
•Use the click-wheel, go to „Status“ and then to „Priming“. Push the click-wheel and open the sub-display for
the manual mode.
•Insert a time of approx. 1 or 2 minutes in field „Input“ and start the count-down with “Start”. All three pumps
start running with max. pulse frequency.
•Open the priming valves at the dosing pump you want to prime.
The pumps keep on running until the count-down stops or the process is interrupted with the “Stop” button.
•Shut the priming valves as soon as the chemicals flow out of the pump-head without gas-bubbles through
the priming hose back into the cans.
•Let the pumps keep on running for some more seconds to be sure that rely all gas-bubbles leaved the suc-
tion hose and the pump-head in direction to the chamber.
•Push the click-wheel on “ESC” and leave the priming mode.
•At least check the signal-lights “Check” and “Pump” in the “Status” display for correct working when LOTUS
is running. In case the lights are not corresponding LOTUS will stop after a while and you have to repeat the
priming procedure.
Caution!
Do not run the plant in priming mode for a longer period without visual control because of
the risk for overriding the maximum operation pressure!
02-12-10 EMEC 09:10:55
LOTUS 25.9° C
Chlorine Dioxide Generator
Status Menu Logbook Help
Status
Status LOTUS
Check : Mode:
Pump : Proportional
Acid Water Chlorite
ON Stand-by Priming ESC >
Priming
LOTUS
Count-down: 00 minutes Mode:
Input: 05 minutes Manual
Start Stop ESC
Start

17
7. LOTUS Terminal board
* Input for Contact Water Meter:
- Reed-/Magnetic Contact (max. 3 pulse per second) - Optic Coupler
- Hall-Sensor (up to 1200 pulse per second)
COURRENT OUTPUT VERSION (mA):
Output 0-20 or 4-20 based on gr/h production)<<<<<<
13 (-) ; 15 (+)
SEFL „Acid“
SEFL „Chlorite“
SEFL „Water“
Level „Acid“
Level „Chlorite“
10 11 12
07 08 09
N N
N N N
N N
PE
PE
PE
05 06
L 01 02
03 04
1-E-N Bypass-Pump „Water“
2-E-N
3-E-N
4-E-N
5-E-N Alarm Output
5-E-N
Power Supply
90 – 265 VAC
Relay Outputs
current-free
Relay Outputs
NC C NO
NC C NO
+12 VDC
Signal
GND
Green
Brown
White
Yellow
Pump “Acid”
Pump “Chlorite” Pump “Water” Common GND GND Signal (A) Signal (B)
Optic coupled Outputs mA Outputs RS485
for pump type …-IS (Option)
F2
F1
44 45 46
42 43
40 41
36 37
30 31
– +
28 29
– +
26 27
– +
24 25
– +
32 33
– +
15 16
A2 A3
19 20
A6
17 18
A4 A5
21 22 23
+ –
13 14
–A1
11 12
07 08
– +
09 10
– +
05 06
– +
03 04
– +
01 02
– +
34 35
+ –+
System in „Operation“ (N.C.)
or „Stand-by“ (N.O.)
Alarm Output
38 39
*Contact Water Meter
Temperature Probe
„ETEPT“
„STAND-BY“
Batch-Tank „Empty“ Batch-Tank „Full“
Capacity 2 Capacity 1
Proportional – Mode
Batch – Mode
Constant – Mode
Slot 3

LOTUS Terminal board
SEPR module for proximity
switch
Slot 1
Contact (Black)
n/a
+12VDC (Brown)
GND (Blue)
MDSEPR
01 02 03 04
To set the proximity switch enter into configuration menu and select
Probe Flow Alarm
Flow contact can be enabled to stop a dosing procedure using a N.O.
contact mode (normally open) or N.C. contact mode (normally clo-
sed) when status on blocks changes. Rotate wheel to choose
between: “DISABLE”, “REVERSE” (N.O. contact) or “DIRECT”
(N.C. contact). Furthermore “Flow contact” can starts after a speci-
fied time when contact status changes. To set it move wheel on
“Time:00 min”, click it and rotate to choose time (from 0 to 99 mi-
nutes). Confirm selection by clicking wheel.
This function is available only with Cl module installed.
MDMA module
0/20 mA watermeter
inputSlot 4
+
-
MDMA
01 02
Slot 3

18
8. Technical Data
LOTUS MINI 8 LOTUS MINI 20
ClO2production capacity
g/h
8
20
Maximum operation pressure
bar
10
10
Chemical consumption at max. production
l/h
each 0.2
each 0.5
Concentration of ClO2stock solution
g/l
approx. 2 - 20
Power supply
90 – 265 V, 50/60 Hz
Energy consumption
w/h
50
Protection class
IP 65
Dimension:
Width
mm
450
Height
mm
1080
Depth
mm
360
Transportation weight
kg
approx. 30

19
9. Failure messages
In case of a malfunction a message appears on the display and LOTUS stops.
Remove the malfunction and restart LOTUS.
Message
Problem
Solution
Level Acid
One of the chemical cans or the dilu-
tion water storage tank is empty.
Change the chemical can and prime the
pump.
Level Water
Check the supply line for the dilution
water storage tank. Prime the pump.
Level Chlorite
Change the chemical can and prime the
pump.
Contact Batch Tank
Empty Level
The cable of the level-switch is
disconnected or has a damage
Check the proper function of the level-
switch. Call the service in case the level-
switch is damaged.
Flow control Acid
A dosing control is recognizing lack of
or no dosing.
Prime the corresponding pump.
Readjust the flow-sensitivity at the dosing
control.
Call the service in case priming is not
successful.
Flow control Water
Flow control Chlorite
Contact SEFL Acid
A cable of the dosing control is
damaged or disconnected.
Call the service.
Contact SEFL Water
Contact SEFL Chlorite
Analog Input
The analog input signal
is lower 3.5 mA.
Check the signal supply device.
Check the signal cable for damages.
Call the service.
Service required
Call an authorized service technician for
periodic maintenance.
Notice:
The two alarm output relays (terminal 5-E-N) and (terminal 10 (NC) – 11 (C) – 12 (NO)) are
switching on in case of a malfunction. The relays are falling off as soon as the removal of the mal-
function is confirmed with the “Restart” button.
Failure:
07-12-10 14:35:42
Level Acid
Restart