EWS ES 2070 TV User manual

Electronic controller for water softening units
Instruction Manual
ES 2070 TV
Software version
1.0
3

CONTENTS
System Description........................................................................................................ 1
Illustration…………......................................................................................................... 2
Status and Regeneration
messages............................................................................................................ 3
LED - display....................................................................................................... 3
LED - control lamps............................................................................................. 3
LCD - display....................................................................................................... 3
Service status........................................................................................... 3
Regeneration status.................................................................................. 4
Changing and indication of program values..........................................................…….. 5
Hardness of the water supply.............................................................................. 5
Current Time....................................................................................................... 6
Information DISPLAYS........................................................................................ 6
Software version....................................................................................... 6
Flush period. ............................................................................................ 6
Regeneration time..................................................................................... 6
Regeneration restrictions.......................................................................... 6
Additional programs................................................................................... 7
Unit capacity............................................................................................. 8
Treated water produced............................................................................ 8
Inputs. ...................................................................................................... 8
Outputs..................................................................................................... 9
Service - Telephone number..................................................................... 9
Maintenance............................................................................................. 9
Water meters............................................................................................. 9
Flow rate.................................................................................................... 9
Alarms / warnings.......................................................................................................... 10
Programmed capacity exceeded......................................................................... 10
Electrical supply failure....................................................................................... 11
Refill regenerant tank.......................................................................................... 11
Await regeneration.............................................................................................. 12
Pre contact (regeneration pre initiation warning) ................................................. 12
Minimum inter regeneration time limit................................................................. 13
Message: Maintenance........................................................................................ 13
Manual regeneration initiation........................................................................................ 14
Remote control.............................................................................................................. 15
"water meter" Signal input.................................................................................... 15
"regenerant chemicals low" Signal input.............................................................. 15
"wait " Signal input............................................................................................. 15
"start" Signal input............................................................................................... 16

Special functions.......................................................................................................…. 17
Duty changeover without regeneration................................................................ 17
Regeneration of the standby unit......................................................................... 17
Regeneration stop............................................................................................... 17
Fast program facility............................................................................................ 18
Flush ON/OFF..................................................................................................... 18
Regeneration without counter reset..................................................................... 18
Setting and changing of initial values............................................................................. 19
1. Installation ....................................................................................... 20
2. Pre service regeneration........................................................................... 20
3. Prohibited regeneration period.................................................................. 21
Start on real time clock…................................................................……... 22
4. Time controlled regeneration..................................................................... 23
5. Minimum time between regeneration’s....................................................... 24
6. Water meter.............................................................................................. 25
7. Incoming water supply hardness............................................................... 26
8. Exchange capacity.................................................................................... 27
9. Pre regeneration signalling........................................................................ 28
10. Electrical control........................................................................................ 29
11. Number of valve switching pulses............................................................. 30
12. Pulse timing.............................................................................................. 31
13. Regeneration times................................................................................... 31
14. Programmable outputs……………………………………………………...... 32
15. Additional program 1.……………….......................................................... 33
16. Additional program 2.……………….......................................................... 34
17. Additional program 3.……………….......................................................... 34
18. Flushing ……………..……………….......................................................... 35
19. Flow pulse …………..……………….......................................................... 35
20. Alarm output ………..……………….......................................................... 35
21. Warning output ……..……………….......................................................... 36
22. Input 5 ……............................................................................................... 36
23. “Start” input............................................................................................... 37
24. Maintenance ............................................................................................ 37
Electrical connection details........................................................................................... 38
Installation and commissioning........................................................................................ 39
Technical specifications................................................................................................. 40
Declaration of conformity................................................................................................. 41

ES 2070 TV System Description 1
System Description
The ES 2070 TV controller is designed for the monitoring and control of simplex (single exchange
column), duplex (twin exchange columns) and triplex water softener installations.
Whilst a simplex installation can not provide softened water to service when the exchange column is in
regeneration, a duplex or triplex installation is capable of providing treated water from one ore two
columns whilst the other is being regenerated. Duplex and triplex plants can be operated either in
duty/standby mode (one (or two) unit(s) in service, the other either in regeneration or waiting to be called
into service), or in parallel mode (two or three units in service except when one is regenerating). The
regeneration of an exchange column is effected either by one central control valve or by means of a pilot
system controlling individual valves.
There is also the possibility for switching filters online and offline depending on the flowrate. This means
that filters will go into service of go out of service depending of the demand of softened water per hour.
Regeneration is usually initiated after a measured volume of water has passed through the plant, this
volume is automatically calculated when the exchange capacity and the feed water hardness are
programmed into the controller. Alternatively the regeneration cycle may also be initiated either, after a
predetermined time period, or, by the operation of an external contact e.g. hardness monitoring
equipment, or, push button, or, based on the real time clock. Because, particularly with simplex plants,
there can be periods of the day when regeneration would be undesirable, e.g. periods of high demand,
the control can be programmed so that regeneration cannot take place between certain times. When this
postponed regeneration facility is in use, any initiation signal is stored and a display indicates the earliest
time at which the already initiated regeneration cycle may commence.
An external contact may be used to:
a) inhibit or abort a regeneration cycle
b) open or close the service valve.
In order to prevent microbiological degradation of the unit due to prolonged periods of non operation, the
stand-by unit of a duplex or triplex water softener installation can be regenerated immediately prior to
being put into service.
A minimum time interval between successive regeneration cycles may be set, thus allowing brine
systems to recover between regenerations, if necessary.
Six volt free relay contacts are available for control of valves, pumps, lamps, etc. or can be used for
remote monitoring. All these outputs are programmable for the following functions :
1. Three additional program relays :
Available before, during or after part of the regeneration cycle.
2. Flush relay :
Can be used to open a dump valve flushing the plant to drain each time a pre-set
volume of treated water has been produced.
3. Transport pump relay :
Allows control of a valve or pump during the regeneration or service.
4. Regeneration relay:
Contact available during the regeneration cycle.
5. Flow pulse relay :
repeats the contact of the water meter for remote monitoring of water use.
6. Warning relay:
Programmable warning contact.
7. Alarm relay:
Programmable fault contact.

ES 2070 TV Illustration 2
Illustration
Wall mounted type ES2070 TV
1 Service Filter 3 7 Warning 13 Real Time Clock 19 previous program step
2 Service Filter 2 8 Alarm 14 Reset 20 Numerical input
3 Service Filter 1 9 Main fuse 15 Information 21 LCD -display
4 Regeneration Filter 3 10 Main switch 16 Programming 22 LED - display
5 Regeneration Filter 2 11 Regeneration start 17 Move cursor
6 Regeneration Filter 1 12 Water hardness 17 next program step
MT 4A
1
2
3
4
5
6
7
11
12
13
14
15
16
8
21
22
17
18
19
20
#
Enter
m3
STOP
2 31
9
10

ES 2070 TV Status and regeneration messages 3
Status and Regeneration messages
LED - display .
m³
Whilst a unit is in service the LED - display indicates the remaining volume of water which can be
softened before the next regeneration will be required.
When operating without a water meter, i.e. in time control, the display shows the full capacity between
regeneration’s.
During the regeneration of a simplex plant the display will read " 0 m
3
".
If the maximum value of 9999 is exceeded the LED display will show the text "OFL" as long as the value
is to high.
NB! There is an additional "decimal point" in the bottom right hand corner of the display. This flashes
when flushing has been commenced (see step 18 in the basic program).
LED - control lamps
Coloured lamps are used to give the most important status indications.:-
Unit 1 in service (green)
Unit 2 in service (green)
Unit 3 in service (green)
Unit 1 in regeneration (yellow)
Unit 2 in regeneration (yellow)
Unit 3 in regeneration (yellow)
Message (red)
Fault (red)
LCD - display.
Service status.
The first line of the LCD display indicates the actual condition of the plant, e.g. unit 1 in service.
Usually during the service cycle the following information is given by the second line of the LCD:
The left hand part of the line shows the incoming water hardness which has been programmed
into the unit.
The current time is displayed on the right.
Service unit 1
200mg/l Mo 17:00
1
2
3
Filter 1 Filter 2 Filter 3

ES 2070 TV Status and regeneration messages 4
However some operating regimes will produce alternative messages :-
or:
If the control has been set to initiate a regeneration after a fixed time interval the second line of the
display will show the number of hours remaining until regeneration will take place and the current
time.
or:
The control can be programmed to give a signal, e.g. for a bleed valve, each time a predetermined
volume of water has been supplied. When this output is active the second line of the display shows
the remaining signal duration.
or:
The remaining capacity of the filter is displayed in percent of the maximum capacity.
This will only be shown when more then one water meter is selected (step 6.3 = Y).
Regeneration status.
The first line of the LCD display indicates the actual condition of the plant, e.g. unit 1 in regeneration.
The second line of the LCD display shows, the regeneration step or phase in progress and the time
remaining in the step If "Step: 0" is displayed it means that the additional routine will operate before
regeneration can commence, similarly "Step: E" indicates that the additional routine is continuing beyond
the end of the regeneration cycle. If required the duration and remainder of the additional routine can be
displayed briefly by pressing the INFO key (see page 6).
At the start of a regeneration there will be checked if regeneration is allowed (prohibited regeneration,
chemical tank empty, wait, minimum regeneration distance or ion exchange capacity exceeded).
The unit is then waiting for regeneration in this will be displayed in the LCD.
Service unit 1
72h Mo 17:00
Service unit 1
Flush-time 20s
Fi.1 Fi.2 Fi.3
50% 100% 100%
Regen. unit 1
Phase : 2 15m
Regen. unit 1
Wait for regen

ES 2070 TV Changing and indication of program values 5
Changing and indication
of program values.
The most important program values can be recalled and, changed if required, by pressing a key.
Hardness of the water supply.
Press the "Hardness" key, indicated by the symbol , to display the supply water hardness.
Should it be necessary to change the programmed value; the arrow key "8" may be used to move the
flashing cursor to the digit to be changed, and the Number key "#" to make the change.
A desired unit of hardness measurement may be selected (section 7 of the programming instructions),
the following are available :-
Hardness units Programmable range
°D
°F
°E
mg/l CaCO
3
gpg
German hardness degrees
French hardness degrees
English hardness degrees
Milligrams per liter as CaCO
3
Grains per gallon
2
-
99
4 - 199
2 - 99
40 - 1990
2 - 99
The controller automatically recalculates the capacity between regeneration’s using the new value, at the
initiation of the next regeneration cycle, as follows :-
Important Note! If a hard water blending by pass is used so that the water meter indicates the blended
water capacity, it is essential to subtract the final, blended, water hardness from the value to be inserted.
Example:
supply water hardness = 300 mg/l CaCO
3
, blended water hardness = 120 mg/l CaCO
3
Thus a value of 180 mg/l CaCO
3
(300 mg/l CaCO
3
- 120 mg/l CaCO
3
) must be programmed into the
control.
Water hardness:
220mg/l
Column capacity [ mg/l CaCO
3
/m
3
of resin x m
3
of resin]
=Softened Water Capacity [m
3
]
Supply Water Hardness [mg/l ~ CaCO
3
]

ES 2070 TV Changing and indication of program values 6
Current Time.
Press the "Time" key indicated by the symbol , to display the current time.
Should it be necessary to change the programmed value; the arrow key "8" may be used to move the
flashing cursor to the digit to be changed, and the Number key "#" to make the change.
Information DISPLAYS.
The "INFORMATION" key makes it possible to retrieve information, e.g. values from memory. Each time
the "INFORMATION" key indicated by the symbol , is pressed a different piece of information is
displayed :-
Software version
The software is regularly updated in the factory. Modifications are made in order to adapt the product in
accordance technological changes and customer
Flush period.
The programmed volume between successive flush signals, the volume remaining to the next flush
signal and the duration of the flush signal are displayed.
Regeneration time .
The duration of a complete regeneration cycle and the possible additional time which could be
programmed are displayed.
Regeneration restrictions.
NoReg 16:00-18:00 if the control has been set to prohibit regeneration between certain times (section 3
of the programming instructions), this part of the display shows the time between which regeneration is
prohibited. Otherwise the display will read : NoReg---.
Current Time
Mo
16:48
Software-version
ES2070TV 1.02.00
Flushing
500l 350l 20s
Regen.time [min]
Σ
ΣΣ
Σ
125 rest 15
NoReg16:00-18:00
IntRg72 MinRg4

ES 2070 TV Changing and indication of program values 7
IntRg 72 if the control has been set to initiate regeneration after a programmed time interval (section 4 of
the programming instructions), this part of the display shows programmed time interval in hours.
Otherwise the display will read : IntRg -.
MinRg 4 if the control has been set to give a minimum period between successive regeneration’s
(section 5 of the programming instructions), this part of the display shows the programmed time interval
in hours.
Otherwise the display will read : MinRg -.
Additional program 1
If the additional program 1 has been selected (section 14 of the programming instructions), the selected
start time and the duration of the additional program are displayed, if "Step 0" is displayed the additional
routine will operate before regeneration can commence, similarly "Step: E" indicates that the additional
routine will continue beyond the end of the regeneration cycle. If the program is activated the display
shows how long it has left to run.
If additional program 1 is not selected, "No additional program" will appear in the display.
Additional program 2
If the additional program 2 has been selected (section 14 of the programming instructions), the selected
start time and the duration of the additional program are displayed, if "Step 0" is displayed the additional
routine will operate before regeneration can commence, similarly "Step: E" indicates that the additional
routine will continue beyond the end of the regeneration cycle. If the program is activated the display
shows how long it has left to run.
If additional program 2 is not selected, "No additional program" will appear in the display.
Additional program 3
If the additional program 3 has been selected (section 14 of the programming instructions), the selected
start time and the duration of the additional program are displayed, if "Step 0" is displayed the additional
routine will operate before regeneration can commence, similarly "Step: E" indicates that the additional
routine will continue beyond the end of the regeneration cycle. If the program is activated the display
shows how long it has left to run.
If additional program 3 is not selected, "No additional program" will appear in the display.
Additional prog1
Step:2 20m
Additional prog2
Step:2 30m
Additional prog3
Step:2 40m

ES 2070 TV Changing and indication of program values 8
Unit capacity.
The calculated capacity between regeneration’s is displayed.
Treated water produced.
The total volume of water which has been treated by the plant.
Warning: This counter can be reset to zero by a service engineer, consult service logs for details of the
value prior to reset.
Input 1.
Indicates the current status of each input, the inputs are :-
WM1= watermeter1 WM2= watermeter2 WM3= watermeter3
Inputs WM1, WM2 and WM3 are shown as active when the external contacts are closed.
Active states are indicated by "|" after the input reference, inactive by "-".
Input 2.
Or:
Indicates the current status of each input, the inputs are :-
RC = water meter, WA = wait or SP =service stop, RS = regeneration start
Inputs WA, and RS are shown as active when the external contacts are closed, RC and SP are
active when the external contact is open. Active states are indicated by "|" after the input reference,
inactive by "-".
Unit capacity
150 m3
Treated water
45367 m3
Input 1
WM1- WM2- WM3-
Input 2
RC- WA- RS-
Input 2
RC- SP- RS-

ES 2070 TV Changing and indication of program values 9
Outputs.
Indicates the current status of each output, " l " below an output number indicates an active output," - "
an inactive one.
Service - Telephone number.
To change the telephone number.
Select the digit using the "8" key, the number can then be changed by using either the "6" or "t" key.
Maintenance.
If the automatic maintenance required warning is programmed the preset maintenance interval is
displayed on left hand side of the second line and the quantity of treated water produced since the last
maintenance visit is displayed on the right hand side of the second line.
Water meters.
The remaining capacity of the filter is displayed in percent of the maximum capacity. When a filter is
not selected this will be indicated by “---“.
Flow rate.
If programmed in step 1.3, the flow rate per filter will be displayed.
The displayed value is an average of the measured volume of softened water over the last minute.
123456789ABCDEF
-----|--------|
Service
123 124711
Maintenance
500m3 20m3
Water meters
96% 100% ---
Flow rate m3-h
10 0.00 0.00

ES 2070 TV Alarms / warnings 10
Alarms / warnings.
When the equipment is operating, various messages may appear in the display, this facility can be used
to drive relay outputs or to give alarms or warnings. The relay positions are indicated by red control
lamps bearing symbols for "Attention" for messages and "Stop" for malfunctions. The programming of
these functions is described in sections 20 and 21 the programming instructions.
Descriptive text appears in the LCD display, in addition to the fault or warning light indication.
Programmed capacity exceeded.
This message can only be displayed when controlling a duplex or triplex plant and appears if the working
unit requires regeneration whilst the off line unit is in regeneration.
Possible causes when the plant is water meter controlled:
Wrongly programmed capacity.
Wrongly programmed incoming hardness.
The water meter is faulty or of the incorrect type.
Excessive demand for water e.g.. a large tank being filled very rapidly.
Possible causes when regeneration is remotely initiated by water analysis equipment signal:
Faulty analytical equipment.
Incorrect operation of analysis unit.
Water analysis equipment too sensitive or giving spurious readings.
Inadequate regeneration of the unit leading to shortfall in capacity.
IMPORTANT! In this condition if regeneration initiation is volume dependent, i.e.. by water meter, the
on-line unit will begin to regenerate as soon as the other unit has finished it's regeneration.
If a salt saturator is being used and there is insufficient brine available for the second regeneration the
second regeneration cycle must be prevented either by switching off the control or by giving a "wait"
input. Once sufficient brine is available the second unit can be allowed to regenerate.
Press the "UNLOCK" key indicated by the symbol , in order to reset the warning or alarm relay. If the
key is pressed a second time, the LCD display will also be reset, if there is only one filter in regeneration.
Installation
Cap.exceeded

ES 2070 TV Alarms / warnings 11
Electrical supply failure.
If there is a failure of the power supply no status information will be lost. The control panel "remembers"
the condition it was in when the supply is interrupted.
IMPORTANT! If the plant is in a regeneration cycle when the power supply fails it is possible for the unit
to become partially exhausted, by the passage of water to drain, if the water supply is maintained during
the power failure.
In this situation the regeneration cycle should be terminated and a new cycle initiated first ensuring
sufficient regenerant is available.
Press the "UNLOCK" key indicated by the symbol , in order to reset the warning or alarm relay and
then reset the current time.
Refill regenerant tank.
NOTE: This message can only appear only if there is a "regeneration chemicals" input connected.
Regenerant chemicals should be added to the regenerant tank.
IMPORTANT! One regeneration cycle will be performed after this message appears. and regeneration
may still be initiated by pressing the "REGENERATION START" key indicated by the symbol .
Press the "UNLOCK" key indicated by the symbol , in order to reset the warning or alarm relay. The
message will then clear when regeneration chemicals are available.
With duplex or triplex plant operating in standby mode the standby unit will automatically be brought into
service even though regeneration of the exhausted column cannot take place.
Signal
Power supply
Refill
regenerant tank

ES 2070 TV Alarms / warnings 12
Wait regeneration.
This message appears during the regeneration cycle only if there is a "Wait" contact, for example a
water pressure switch intended to prevent regeneration when there is insufficient water pressure,
connected.
Press the "UNLOCK" key indicated by the symbol , in order to reset the warning or alarm relay. This
will abort any regeneration cycle which is in progress.
Important Note: If the manual regeneration key indicated by the symbol , is pressed the "Wait" signal
is temporarily neutralized and the regeneration cycle will take place.
The alarm and warning relays and the LCD signals are cleared, as soon as the "wait" signal is removed.
In order to prevent cancellation of the warning before the fault has been cleared it is not possible to
manually reset the message relay.
With duplex or triplex installations, operating in standby mode, the stand by unit will be brought on-line if
there is a "wait" signal when a regeneration cycle is initiated.
IMPORTANT If "EURO" is selected at step 10.1 of the programming sequence the outlet (pilot) solenoid
valves will be closed in the service condition.
IMPORTANT Any additional program will be disabled.
Pre contact (regeneration pre initiation warning).
This message will only be appear, if selected (section 10 of the programming instructions).
Press the "UNLOCK" key indicated by the symbol , in order to reset the display and the alarm relay,
if programmed. If the warning relay is programmed it cannot be cancelled manually. This is to prevent
premature disconnection of, for example, water analysis equipment.
The display and the relay are automatically cancelled when the regeneration cycle is initiated.
Signal
Wait
Signal
Pre contact

ES 2070 TV Alarms / warnings 13
Minimum inter regeneration time limit.
This message will only appear if a minimum interval between regeneration’s has been programmed
(section 5 of the programming instructions).
Possible causes when the plant is controlled by a water meter:
Wrongly programmed capacity.
Wrongly programmed incoming water hardness.
The water meter is faulty or of the incorrect type.
Excessive demand for water e.g. a large tank being filled rapidly.
Possible causes when activated by an external water analysis equipment signal:
Poor water quality from a column which has been on standby for some time, due to the contra ion effect.
this can be overcome by fitting a flushing valve or circulation pump in the system or by reducing the
sensitivity of the analytical equipment.
Press the "UNLOCK" key indicated by the symbol ,to restore the display and reset the alarm relay, if
programmed.
Maintenance.
This message can only appear when the facility for giving an automatic warning that maintenance is due
has been selected in section 24 of the programming sequence.
Press the "Reset" key with the symbol in order to reset the alarm relay, if programmed, and call your
maintenance company. The LCD display can only be cleared by trained personnel.
Minimum regene-
ration period
Signal
Maintenance

ES 2070 TV Manual regeneration initiation 14
Manual regeneration initiation.
A regeneration may be manually initiated at any time. Press the "REGENERATION INITIATION" key
indicated by the symbol , after 5 seconds regeneration of the on line unit is initiated.
 With duplex or triplex installations operating in standby mode the stand by unit is brought
into service.
 If the prohibited time function is already activated the regeneration will initiate, i.e.
the prohibited time function will be overridden.
 The counter is reset to the calculated capacity after the regeneration.
 If the unit has been set to initiate a regeneration after a fixed time has elapsed,
(section 4.1 of the programming instructions) the interval timer is reset to its
programmed value and restarted.
 If a minimum time between regeneration’s has been programmed (section 5.1 of the
programming instructions), the timer will be overridden and reset.

ES 2070 TV Remote control 15
Remote control.
The following functions may be remotely controlled by switch contacts connected to the terminal strip of
the controller :-
"Watermeter1", "Watermeter2" and "Watermeter3" inputs (WM1,WM2,WM3).
"Contact head"/"reed" water meters give a pulse each time a fixed volume of water has registered e.g. of
every 100 litres. These pulses are counted by the controller and once the calculated capacity has been
supplied a regeneration is initiated.
The controller cannot accept more than 10 pulses per second.
"Regenerant chemicals low" input (RC) .
This input signal can be used to monitor the regenerant tank and prevent regeneration is there are
insufficient chemicals available.
The warning will not immediately prevent a regeneration, because it is assumed that there will be
sufficient chemicals present for one regeneration. By pushing the key "REGENERATION INITIATION"
indicated by the symbol , it will is possible to override the warning and initiate a regeneration.
IMPORTANT! The input signal facility does not monitor the regenerant tank until 3 hours after a
regeneration has taken place, however if a regeneration is initiated during this time the regenerant tank
is checked. The facility is disabled during regeneration.
"Wait " input (WA).
This input can be used for either of two different functions (see section 22 of the programming
sequence).
Function WA : Active during the regeneration
The input signal can be used to hold off or stop a regeneration cycle. The input is active only during a
regeneration cycle.
With duplex or triplex installations, when the signal is active, regeneration of an exhausted unit can not
be initiated but, if the plant is operated in standby mode, the stand by unit will be brought on line.
After the "WAIT" signal is cleared the regeneration cycle is commenced or continued.

ES 2070 TV Remote control 16
When "REGENERATION INITIATION" indicated by the symbol , is pressed, the "WAIT" signal will
be suspended for the duration of the regeneration cycle.
When using the fast program key facility, (see special functions page 17) it is possible to step
forward to the next regeneration step.
IMPORTANT If "EURO" is selected at step 10.1 of the programming sequence the outlet (pilot) solenoid
valves will be closed in the service condition.
IMPORTANT Any additional program will be disabled.
Function SP: Active during service.
The service valves will open or close in response to the input.
APPLICATION: Treated water storage tank level control.
"Start" input (RS).
This input signal can be used to initiate a regeneration of the plant by remote means, e.g. a push button,
or water monitoring equipment. When operating a duplex or triplex plant in standby mode the standby
unit will be brought on line. A start-up delay can be set at program step 23.2
If a minimum interval between regeneration’s has been programmed (section 5 of the programming
instructions) if an attempt is made to initiate a regeneration during this interval the "minimum
regeneration time" warning will be displayed. Regeneration will not be initiated, manual initiation will be
required and the alarm must be manually reset. (see page 13.)
On a simplex plant the input is disabled during regeneration and only becomes available again once the
regeneration is complete and the time entered at program step 23.1 has elapsed.
In double or triple filter systems the input is blocked after the start of regeneration for the time
entered at program step 23.1. Then if a start signal is present the report "system overloaded"
is shown, since evidently both filters are exhausted.
NOTE The time entered at program step 23.1 is also activated after a power loss to allow for
a measuring device to take a new measurement.

ES 2070 TV Special functions 17
Special functions.
These functions should only be used by a trained specialist, ill considered use of these functions will
cause operating problems.
Duty changeover without regeneration.
Press the "UNLOCK" key and the "INFORMATION" key simultaneously. On a duplex or triplex
plant duty changeover takes place after 2 seconds delay.
IMPORTANT There are separate counters for each exchange column. If an almost exhausted column is
brought into service, then that unit may require regeneration whilst the other unit is in regeneration. The
"period capacity exceeded" warning will be displayed.
Regeneration of the standby unit .
Press the "TIME" key simultaneously with the "UNLOCK" key . On a duplex or triplex
plant regeneration of the stand by unit is initiated after 2 seconds delay.
Regeneration stop.
Press the "REGENERATION INITIATION" key and the "UNLOCK" key simultaneously. The
regeneration in progress will be aborted after 2 seconds and the plant will be return to the normal service
condition.
IMPORTANT Pilot stagers for manifold valves may not have an automatic "return to service" facility
when the control is returned to the service condition, this type of stager will hold the plant in regeneration
mode and will no longer be synchronized with the controller.
IMPORTANT If regenerant has been drawn into the plant it will be necessary to rinse the regenerant's
out before allowing the plant to supply water to service.