Ezetrol Controller Issue 2 WT GE.IM.0208

Transcription

1 Ezetrol Controller Issue 2

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3 Water Technologies Chemfeed Limited, Priory Works, Tonbridge, Kent, TN11 0QL, England Telephone Fax Internet +44 (0) (0) IMPORTANT ANNOUNCEMENT Supply of Spares - Payment by Credit/Debit Card Siemens Water Technologies are pleased to announce that we are now able to accept payment for spare parts by major credit/debit cards. We appreciate that some of our Customers periodically require quantities of spare parts, possibly to repair plant breakdowns. Standard procedures, whereby an official order has to be issued before parts can be supplied, often hinders this process, leaving the operations/maintenance personnel frustrated and without vital spares to complete the job. If you, or your staff, have a valid credit/debit card, that is all you need. We will not require an official order to cover credit/debit card transactions. To order freephone Our staff will take all the details and advise you on price and availability of your parts requirements. Your order will be despatched the same day wherever possible (depending on the time the order is placed). If ordered late in the day, it will be despatched the next working day. An invoice will be sent to your designated invoice address with a copy of the credit payment slip for your records. We are sure that this Fast Track facility will be welcomed by your sharp end personnel who keep plant operational. R. Russ General Manager Sales & Marketing

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5 s Water Technologies CUSTOMER FEEDBACK In line with our ISO 9001 Quality Procedures, we are constantly looking for ways in which to improve our level of service to our customers. We are therefore very interested to obtain your views of the current service we provide and any ideas for improvement. We want to deliver a service that is tailored to meet your needs, so we would be most grateful if you take a few moments to complete this feedback form. We read every comment, good or bad, highlighted on returned questionnaires and will take the comments extremely seriously. The results will be reported to our management team as part of our quality procedures. Would you please complete the form below. This will help us assess your responses accurately. If you have any comments that that will help us improve our service, could you tell us what could have been done differently using the space in the appropriate sections. Please return your completed form in the pre-paid envelope or, if you prefer, fax back to +44 (0) Did we Excellent Highly Satisfactory Satisfactory Unsatisfactory Highly Unsatisfactory 1 Treat you in a helpful & friendly manner? 2 Provide sound advice, which demonstrates professionalism and knowledge of your application? 3 Provide products and services that meet your range of chemical dosing & disinfection needs? 4 Provide products and services of the quality that meets your needs? 5 If you have recently received an instruction manual, was it clear & easy to understand? 6 If you have recently requested parts, were those parts available? 7 If we have recently supplied equipment to you, did it meet its stated performance? 8 Give efficient, prompt service and keep you up to date on progress of your order? 9 Are we there when you need us accessible and supportive? 10 Did we take ownership of any problems that may have arisen? 11 Overall how do you rate our service? Much Better Better The same Worse Much Worse 12 Compared to 12 months ago, how do you rate our company s performance? 13 Compared to other equipment companies, how do you rate our service? Definitely Probably Undecided Probably not Definitely not 14 Would you recommend our company to a colleague? Chemfeed Limited, Tonbridge, Kent Form RD1012, Issue 3, June 2007

6 15 If you are not at all satisfied with our service, it would help us if you could tell us why and what we could have done differently. 16 Please give us you suggestions on how we can improve our products and services, or tell us those you would like us to introduce. 17 Within our company, we like to recognise those people who provide excellent customer service. If you have received such a service, please name the person or the team involved. 18 Which other equipment suppliers you deal with provide the level of service that you require? 19 What makes them better? 20 Any other comments or feedback Name: Company: Address: Position: Tel: Fax: Thank you for your time in completing this questionnaire. This will help us to further improve the services we offer, and ensure that we meet your future requirements. Clive Dean Managing Director Chemfeed Limited, Tonbridge, Kent Form RD1012, Issue 3, June 2007

7 Introduction. The Stranco Ezetrol chlorine & ph swimming pool controller offers a chlorine measurement range from mg/l making it suitable for all types of indoor and outdoor swimming, hydrotherapy and spa pools. Utilising the Ezetrol sample cell, with unique flow regulator, which houses the amperometric chlorine sensor, ph and optional redox probe, the Ezetrol guarantees precise measurements in compliance with DIN Operation of the Ezetrol, without the need for ph buffer solutions, ensures low cost of ownership and as the 3-electrode chlorine sensor is hydro-mechanically cleaned, providing long term stability and low maintenance attendance. Available with or without ma analogue outputs, the Ezetrol controller can be easily configured to provide options for a simple read & feed pool or spa through to totally BMS monitored applications. The analogue outputs provide for remote display of measured values and the printer connections may be used for printer output to a dot-matrix printer for continuous text and graphics. The Ezetrol clearly indicates system status and also provides pool operators with a unique swim safe at-a-glance LED alarm. The Ezetrol is available in four options:- Eze 101 Stranco Products Ezetrol 101 Automatic Chemical Dosing Controller. A microprocessor based amperometric free chlorine and ph controller. Ranges; chlorine 0 to 9.99 mg/l, ph 4.00 to An alphanumeric display provides current chlorine and ph readings together with the controller access menus and alarm conditions. Supplied complete with flow cell, flow switch, strainer, 30m of LPD40 sample hose, sample installation kit and sensors. Pre-mounted on a upvc board. Eze 102 Stranco Products Ezetrol 102 Automatic Chemical Dosing Controller. A microprocessor based amperometric free chlorine, ph and redox controller. Ranges; chlorine 0 to 9.99 mg/l ph 4.00 to 9.00 redox 0 to 999 mv. An alphanumeric display provides current chlorine, ph and redox readings together with the controller access menus and alarm conditions. Supplied complete with flow cell, flow switch, strainer, 30m of LPD40 sample hose, sample installation kit and sensors. Pre-mounted on a upvc board.

8 Eze 103 Stranco Products Ezetrol 103 Automatic Chemical Dosing Controller. A microprocessor based amperometric free chlorine and ph controller. Ranges; chlorine 0 to 9.99 mg/l ph 4.00 to An alphanumeric display provides current chlorine and ph readings together with the controller access menus and alarm conditions. 0(4)-20 ma outputs are available for both channels for connection to auxiliary recorder or display device. Supplied complete with flow cell, flow switch, strainer, 30m of LPD40 sample hose, sample installation kit and sensors. Pre-mounted on a upvc board. Eze104 Stranco Products Ezetrol 104 Automatic Chemical Dosing Controller. A microprocessor based amperometric free chlorine, ph and redox controller. Ranges; chlorine 0 to 9.99 mg/l ph 4.00 to 9.00 redox 0 to 999 mv. An alphanumeric display provides current chlorine, ph and redox readings together with the controller access menus and alarm conditions. 0(4)-20 ma outputs are available for all three channels for connection to auxiliary recorder or display device. Supplied complete with flow cell, flow switch, strainer, 30m of LPD40 sample hose, sample installation kit and sensors. Pre-mounted on a upvc board. Contents Title Section Specification 1 Installation 2 Transport 2.1 Unpacking 2.2 Location 2.3 Mounting 2.4 Sample Water Requirements 2.5 Sample Supply 2.6 Sensor Connection 2.7 Electrical Connections 2.8 Start-Up 2.9 Operation & Maintenance 3 Ezetrol Controller Overview 3.1 Ancillary Board Mount Equipment 3.2 Sample cell Flow switch External stop Strainer

9 Isolator Sensors 3.3 Sensor cleaning Probe replacement Probe care Seasonal Operation 3.4 Ezetrol Operation 3.5 Access code Chlorine set point adjustment ph set point adjustment Chlorine calibration ph calibration Redox calibration (option) Pump operation Overfeed failsafe alarm Commissioning 4 Commissioning Procedure 4.1 Flow Cell Set-up 4.2 Adjustment and Calibration 4.3 Menu Navigation 4.4 Access Code 4.5 Overfeed Protection 4.6 To adjust the overfeed protection time Proportional Control of On/Off Solenoid & Motor Driven Dosing Pumps 4.7 To select the dosing pump type Solenoid Pulse Pumps 4.8 To adjust the output selection for solenoid pulse pumps Bi-directional ph control- (control of ph- and ph+ dosing pumps) 4.9 Adjusting the bi-directional neutral zone Proportional Factor (Xp) 4.10 Adjusting the proportional factor (Xp) Integral Action Time (Tn) 4.11 Adjusting the integral action time (Tn) Menu Overviews 5 Display Menu 5.1 Calibration Function Menu 5.2 Cl2 Parameter Function Menu 5.3 ph Parameter Function Menu 5.4 Alarm Function Menu 5.5 Alarm Relay 1 & Alarm Relay 2 Function Menus 5.6 Setting a relay assignment Set up function menu 5.7 Auto tune menu 5.8 Diagnostics menu 5.9 3

10 Troubleshooting Guide 6 Ezetrol Appears to be 'Dead' 6.1 Alarm Lights Flashing 6.2 ph high alarm ph low alarm (ph- units) ph low alarm (ph+ units) ph high alarm (ph+ units) ph overfeed alarm No ph feed Constant ph Overdosing 6.3 Inaccurate ph Readings 6.4 Chlorine High Alarm 6.5 Chlorine Low alarm 6.6 Chlorine Overfeed Alarm 6.7 No Chlorine Feed 6.8 Constant Chlorine Overfeed 6.9 Inaccurate Chlorine Reading 6.10 No Output to Remote Alarm (if fitted) 6.11 Intermittent Controller Faults 6.12 Warranty 7 Timer Increment Example 8 Illustrations Ezetrol Typical Installation Ezetrol Connection Diagram Ezetrol Single Board Mount Fig.1 Fig.2 Fig.3 4

11 1 Specification. Function: Display: Continuous micro-processor based monitoring and control of chlorine and ph Back-lit alphanumeric display of pool readings, parameter menu and alarm condition text Access And Adjustment Method: Membrane Keys with single, user-defined, access code Sensing Inputs: Chlorine: Amperometric Free Chlorine Probe ph: Gel-filled Glass Probe Redox (option): Gel-filled Glass Probe Set Point Range/Display Range: Chlorine : 0 to 9.99mg/l ph : 4.00 to 9.00 Redox (optional): 0 to 999 mv Sample Flow Control: Pressure and Flow regulated for to waste or return to system Standard Calibration: Chlorine: DPD single point calibration ph; Phenol Red single point calibration Redox (option): Single point buffer calibration Feed Mode Selection: Feed Indicators: Alarm Outputs: ph & Chlorine Auto & Manual (on/off) On/Off LED 2 individual relay channels with individual parameter selection Proportional & On/Off Control: Both channels selectable Overfeed Limit: Manual Feed Protection: Swim Safe ALARM: Acid/Alkali: Alarm Parameters: Timer protection (0-10 hours in 0.1hr increments) Both channels selectable (0-10 hours in 0.1hr increments) Red/Green LED swim safe Indication Bi-directional / Selectable ph High & Low Chlorine High & Low Redox High & Low Chemical Overfeed No flow External Stop (volt free) 5

12 Printer Output (Optional): RS485 to dot matrix printer for continuous text and graphics Analogue Outputs (Optional): Chlorine: 0(4)-20mA 0 to 9.99mg/l ph: 0(4)-20mA 4.00 to 9.00 Redox: 0(4)-20mA 0 to 999mV Remote Display (Optional): ph & Chlorine displays using (optional) analogue outputs Electrical Circuitry: Input 10 amp 230v/1ph/50Hz Outputs 5 amp AC dry contact relays Enclosure: Dimensions: Warranty: IP66 600mm x 600mm Controller and Sensors - 18 months

13 2 Installation. Only those persons suitably qualified/trained should undertake the installation of an Ezetrol Controller. Only those persons qualified to carry out electrical installation works should undertake the installation of electrical wiring of an Ezetrol Controller. 2.1 Transport During transport the Ezetrol must be handled carefully and should not be exposed to wet weather or moisture. 2.2 Unpacking The equipment should be unpacked in a clean, dry area, preferably in the place in which the unit will be installed. All parts should be checked against the enclosed packing note before the packing materials are discarded. Upon receipt, immediately check if package is free from damage and that the contents are complete. Report immediately any damage. Handle the sensors carefully when unpacking, as they can be broken if dropped on a hard surface. NOTE: Each sensor is shipped with its tip immersed in a small cap of fluid, to prevent it from drying out. Leave the cap in place on the tip until you are ready to install the sensor into a sample cell with a fully established water flow. 2.3 Location There are a number of factors that should be considered as you select a location for the controller. These include, but are not limited to: A sound mounting surface to adequately support the board assembly. A location that is accessible, free from chemical fumes, excessive heat and dampness should be chosen as they can seriously damage the controller. Damage due to chemical fumes, including hydrochloric acid fumes, will invalidate the warranty. The controller should be easily accessible for taking display readings or making operating adjustments. Lighting should be adequate and clearance must be provided for service. Do not mount in direct sunlight.

14 High voltage transformers and other energy-emitting electrical devices can affect the delicate sensing circuits of the controller. Locate the board assembly as far away as practical from sources of interference and be sure that it is electrically grounded as specified in the wiring diagrams. The Ezetrol is designed to be permanently powered. The main power into the unit should NOT be interlocked with main circulation pumps. The controller has a secondary input (external stop), which is used to isolate the dosing pump outputs. This input is volt-free and must not be powered (or the controller will be damaged, invalidating the warranty). The main power feed should be provided from a clean 10-amp switched and fused source. The position of the nearest drain should also be given consideration, as the standard Ezetrol supply requires a drain that is open to atmosphere to which the sample water to runs. An optional return to filtration, post filer, pipework kit is available. 2.4 Mounting 2.5 Sample Water Requirements The Ezetrol should be positioned at an easily read and accessed height. Siemens Water Technologies recommend that the centre of the display is at a height of 1650 mm. The 9mm pre-drilled holes in each corner of the board should be used to pass an 8mm bolt through. The fixing should be passed through the mounting board and one of the spacers supplied, at each corner. The board should NOT be fixed directly against the wall, as this would cause damage to the sensor leads that are passed through the back of the board. Spacers are provided to hold the board off the wall by. Required pressure at flow cell. Minimum 0.25 bar Maximum 4.0 bar A flow of approximately 30 l/hr is required for the accurate operation of the chlorine sensor; the flow regulator automatically limits the amount of water flowing through the cell. A flow in excess of 30 l/hr would be held within the sample water sample pipe work and will eventually pass through 8

15 the flow cell. It is important to use the hose supplied and not to increase the bore of the water supply pipe to prevent undue lag-time between the water entering the sample hose and passing the sensor tips. Water from the flow cell is normally fed to the drain. It is also possible to return the waste water back to a post filter point in the pool water return, at a maximum back pressure of 1.5 bar. A return water installation kit of parts is available. If the flow cell sample supply water pressure is less than 0.25 bar, a sample water pump may be installed either from the pool or from the circulation system (preferred). The use of a booster pump must include a loop of pipe work with a sample tapping to draw of a proportion of the water to pass through the sample cell. This is so not to put the entire pump pressure directly on the to the flow regulator or to create an artificial lag time. 2.6 Sample Supply A sample supply should be run to the location of the board assembly from a point on the pre-filter circulation pipework that is common to all circulation pump deliveries and prior to any chemical injection. A ½ (minimum) drain pipe should be run from the tundish, pre-mounted on the board below the flow cell, to the drain or balance tank that is to be used to handle the sampled water from the flow cell. For sample runs of 1m to 20m, the use of the supplied LDP40 (6/8mm diameter) flexible hose is preferred from the circulation pump(s) delivery pipework prior to the filter. If possible ensure the sample draw-off point is pre fresh water make-up or Alum/PAC dosing point, as this will detrimentally effect the sample. The flexible hose should be protected within a 25mm upvc conduit, suitably supported, and connected to the push-fit adapter on the strainer inlet, outlet and then on the to the flow switch mounted directly under the flow cell. Failure to use the strainer provided will allow debris such as hair & lint to pass into the flow regulator and the flow cell. This will compromise the performance of the Ezetrol and will invalidate the warranty. For sample runs of 20m upwards, a loop from the circulation pump delivery pipework should be taken to a point below or adjacent to the board mount assembly and returned to the suction side of the circulation pump(s).

16 2.7 Sensor Connection 2.8 Electrical Connections The sample loop should be run in ½ upvc pipe, suitably supported throughout its entire length. A ½ tee adjacent to the flow cell should be fitted and a minimal length of 6/8mm hose and connected to the adapter on the strainer inlet, out let and then on the to the flow switch mounted directly under the flow cell. The fittings from the tee to the flow cell are included the ½ upvc pipe and fitting are to be supplied by others. Please note that if 50% duty circulation pumps are employed, running only one pump only will reduce the sample rate of flow to the flow cell. Attention should be given to the amount of flow during this period and, if adjusted, the subsequent flow when the second pump flow is restored. Should the waste water be returned to the post filter circulation pipe work remove the tundish from the board and the threaded insert, plus the spare threaded insert, used to support an isolation valve. Remove protective caps from the ph and chlorine sensors. Screw sensors into the flow cell. The chlorine sensor has an integral lead that can not be removed from the sensor. The back nut/thread on the sensor may be screwed into the flow cell without rotating the sensor or knotting the lead. There should be no air bubbles in the tip of the ph sensor, if there are, remove them by gently shaking the sensor (similar to shaking a clinical thermometer). After start-up, all sensors require a settling-down period of approximately two - four hours. Calibration and other adjustments should only be made after this period and automatic feed control should be switched off. The Ezetrol should not be left in automatic feed mode overnight for 24 hours after first fitting the sensors. Do not use stabilised chlorine products, as the Ezetrol will not function correctly. Sensor warranty will be void if the above is not complied with. Only those persons qualified to carry out electrical installation works should undertake the installation of electrical wiring of an Ezetrol Controller. The electrical supply to the board assembly should be wired via a double pole isolation switch. The supply should be fused at 10 amp max and the location of the fuse clearly identified. 10

17 Please refer to wiring diagrams at the rear of this manual for identification of all the terminals to enable cable connection. WARNING: The Ezetrol is designed to be permanently powered. The main power into the unit should NOT be interlocked with main circulation pumps. The controller has a secondary input (external stop), which is used to isolate the dosing pump outputs. This input is volt-free and must not be powered (or the controller will be damaged). Power requirement: 230V AC, 1PH, 50 Hz. 2.9 Start-Up Upon completion of the entire dosing system being installed, isolate the dosing pumps and external alarms at the local point of isolation. Open the sample valves and ensure that water is flowing into the cell and out to waste or back into a valved post filter tapping. Switch on the power isolator at the main panel or distribution board and only then switch on the controller power at the board mount isolator. The Ezetrol has a 3 minute (adjustable) power up delay timer. The controller will go into to control mode until the count down timer on the main display reaches zero. The Ezetrol has a 3 minute (adjustable) sample water delay timer. The controller will go into to control mode until the timer runs down. The Ezetrol is now ready to be commissioned by a Siemens Water Technologies Engineer or a Siemens Water Technologies trained engineer. 11

18 3 Operation & Maintenance 3.1 Ezetrol Controller Overview Display The alphanumeric display in the top left hand side of the Ezetrol is an LCD screen which is used to display the Ezetrol readings of ph, chlorine and redox (optional). It is also used to navigate around the Ezetrol function menus and parameter options. F Function Key. Press to scroll through the Function Menus. E Enter Key. Press to access or save a function parameter. s Up Key. Press to scroll up numerically or through text options. t Down Key. Press to scroll down numerically or through text options. l Dot Key. Press to exit Function Menus. k Star Key. Press to accept alarm conditions or release latched relays. Power Safe Swim Main power indicator shows power to Ezetrol is available. The swim-safe alarm shows either a green or red LED. The green LED indicates that all controller parameters are OK. The red LED gives a single point indication that one of the alarm parameters has been reached. Alarm 1 Alarm 2 Cl2 on ph+ on ph- on A red LED indicates that the one or more of the parameters selected for alarm relay 1 has been reached. A red LED indicates that the one or more of the parameters selected for alarm relay 2 has been reached. A green LED indicates that the chlorine dosing relay has been activated. A green LED indicates that the ph+ dosing relay has been activated. A green LED indicates that the ph- dosing relay has been activated. 3.2 Ancillary Board Mount Equipment Sample Cell A representative sample of pool water is taken from the circulation pump delivery pipe to a purpose-made cell that houses the sensors in an environment that is free from pressure and flow variations, and is protected from debris that may otherwise cause damage to the sensors. The sample water passes from the cell either to drain or returns to the pool dependant upon the installation application chosen. A sample tap is provided on the cell for manual testing. This manual testing must be routinely carried out to ensure the controller is operating correctly. 12

19 The sample may have (uncommonly) been taken from a loop of pipe work around the circulation pump or directly from the pool via a booster pump (more uncommonly) Flow Switch To ensure that the controller does not continue to dose in the event of no sample water flow to the sample cell and the sensors reading only stagnant water with either a high ph or no chlorine, a reed operated flow switch is fitted. When the flow stops the outputs to the dosing pumps are interrupted and the controller displays a DI alarm text. The flow switch should be tested routinely to ensure that the reed switch has not been fouled with such debris and filter sand or hair and operates correctly. The flow switch can be tested simply by shutting off the sample isolation valve External Stop The Ezetrol is designed to be powered up at all times. The Ezetrol incorporates an external stop feature which allows for a volt free input from external ancillary control circuits form such items and the circulation pump starts or a circulation pipe work flow switch. When any of these inputs engages the external stop the outputs to the dosing pumps are interrupted and the controller displays a DII alarm text Strainer To protect the probes from any debris passing through the sample cell, a ½ nominal bore strainer is fitted. The strainer must be routinely inspected and cleaned as necessary. When the strainer becomes blocked the flow through the sample cell will be impaired and the lag time for the sample water to pass through the sample hose will start to increase reducing the controllers ability to finely control the ph and chlorine in the pool water Isolator An isolator switch is fitted to isolate the power to the Ezetrol. No one other suitably qualified electrical engineers should open the Ezetrol control. The isolation of the incoming power should be verified prior to carrying our any works within the controller or any external ancillary equipment electrically connected to the Ezetrol Sensors Sensor Cleaning The intervals between sensor cleaning will be established on site over a period of time. We do not advise that the sensors be routinely cleaned without proper cause, as this will lead to a shortening of the sensor life. 13

20 3.3.2 Probe Replacement Clean only when the controller accuracy begins to fall and the interval between calibration begins to decrease. The Ezetrol has a grit based sensor scouring action. The swirling grit in the cell gently removes debris build up. Over a period of time the debris deposits may overtake the cleaning action and sensors will require cleaning. The grit will also lose its sharp edges and erode away requiring topping up. To clean the probes: 1 Shut the sample cell valve(s). The grit in the cell will stop moving around and the flow can be seen not to overflow the rear outlet hole. 2 Disconnect the ph sensor lead by unscrewing the plug from the top of the probe. The ph sensor may now be unscrewed from the flow cell. 3 The chlorine sensor can not be disconnected from the lead. The back nut unscrews from the flow cell without rotating the sensor or knotting the lead. The chlorine sensor may be lifted out of the sample cell. 4 Remove the sensors from the sample cell and rinse in the Probe Cleaner supplied. Read the instructions on the label carefully as this product is acid based. Rinse both probes well in fresh water and shake-down the ph probe. Make sure you shake-down the ph probe on every occasion. 5 Replace the sensors in the sample cell by reversing the operation described above. And reopen the sample cell valve(s). Check for correct flow by taking a note of the swirling grit in the sample cell. 6 Rinsing the sensors in the acid solution will shock them. The display readings on the Ezetrol will take some time to settle after re-fitting. Before calibration, carefully monitor the Ezetrol display and the pool readings. Once the display/sensors have settled, calibrate the display to the manual test kit readings. The sensors for the Ezetrol are supplied with an 18 month warranty. The life of the probe is dependant upon the demands placed upon it from bather pollution and, therefore the frequency of cleaning. We suggest you assess your probe efficiency between 2 and 3 years. 14

21 3.3.3 Probe Care 3.4 Seasonal Operation 3.5 Ezetrol Operation Access code Should the sample cell be drained or the probes removed from the sample cell, they must be kept in the protective cap supplied, which should contain a little water. If the probes are left dry for more than 1 hour the liquid junction will dry out and the probe will die. If your pool is closed during the winter months, or will not be circulating at all times in freezing conditions, the probes should be removed from the flow cell, replaced in the protective cap which should contain a little water, and taken to a warmer environment. It is generally recommended that any electrical & electronic equipment not being used during winter months is removed to a warm dry atmosphere. Although all of the functions may be accessed and read at any time, adjustment cannot be made unless the appropriate access code is first entered. There is one access code, which may have been enabled during the commissioning procedure. To access the controller. 1 Press the s key repeatedly until the code?????? is displayed. 2 Press the E key to enter the new value. 3 Press the s key until the desired code is displayed. 4 Press the E key to enter the displayed value. 5 Press the l key to return to the normal display. The controller now has the access code selected, the correct code input, entered and the controller open for access. After one hour without pressing a key the value in the display menu is set to 000 and the Ezetrol is access protected. If the access code has not been enabled during commissioning the controller will be free to access at all times. 15

22 3.5.2 Chlorine set point adjustment ph set point adjustment Chlorine calibration. To adjust the chlorine set point; 1 When in normal operating display (with the actual chlorine and ph readings on the screen) press the s key until the text on the screen reads setpoint Cl2. 2 Press the E key to access the chlorine set point parameter. 3 Press the s or t keys until the desired set point is displayed. 4 Press the E key to enter and save the new value. 5 Press the l key to return to the normal operating display with the new set point. To adjust the ph set point; 1 When in normal operating display (with the actual chlorine and ph readings on the screen) press the s key until the text on the screen reads setpoint ph. 2 Press the E key to access the ph set point parameter. 3 Press the s or t keys until the desired set point is displayed. 4 Press the E key to enter and save the new value. 5 Press the l key to return to the normal operating display with the new set point. From normal operating display (with the actual chlorine and ph readings on the screen). 1 Press the F key until the text on the screen reads 'CALIBRATION'. 2 Press the s key until the display reads 'Cl2 DPD'. Carry out a manual DPD No.1 Free Chlorine test. 16

23 3 Press the E key to access the chlorine DPD parameter. 4 Press the s or t keys until the desired DPD value is displayed. 5 Press the E key to enter and save the new value. 6 Press the l key twice to return to the normal operating display, with the new calibrated value displayed. NOTE: The controller is only as accurate as the information input. Ensure that the DPD test is a correct before entering any values into the Ezetrol. NOTE: When scrolling through the calibration menu you will note a menu parameter called Cl2 zero. For normal operation the parameter need not be used when simply carrying out a general calibration ph calibration Redox calibration (option) (The Ezetrol does not require ph buffers to calibrate the ph channel). From the normal operating display (with the actual chlorine and ph readings on the screen). 1 Press the F key until the text on the screen reads 'CALIBRATION'. 2 Press the t key until the display reads calibration ph. Carry out a manual Phenol Red ph test. 3 Press the E key to access the ph calibration parameter. 4 Press the s or t keys until the desired ph value is displayed. 5 Press the E key to enter and save the new value. 6 Press the l key twice to return to the normal operating display, with the new calibrated value displayed. NOTE: The controller is only accurate as the information input. Ensure that the Phenol Red ph test is a correct before entering any values into the Ezetrol. The redox display is for monitoring only and is not included on a standard Ezetrol installation. 17

24 From normal operating display (with the actual chlorine and ph readings on the screen). 1 Press the l key until the text on the screen reads 'CALIBRATION'. 2 Press the t key until the display reads calibration mv. Insert the mv in a known redox buffer solution. 3 Press the E key to access the redox calibration parameter. 4 Press the s or t keys until the desired redox value is displayed. 5 Press the E key to enter and save the new value. 6 Press the l key twice to return to the normal operating display, with the new calibrated value displayed Pump operation The dosing pumps may be run either automatically, by the Ezetrol, or manually. In manual mode the dosing pumps may be either switched on or off. When in the on mode a timer is engaged to switch the pumps off after a predetermined, user defined, period. The run time maybe set between 0.1hours (6 minutes) and 10.0 hours. To put the Ezetrol into automatic or manual mode: 1 When in normal operating display (with the actual chlorine and ph readings on the screen) press the s key until the text on the screen reads Mode. 2 Press the E key to access the pump control mode parameter. Press the s or t keys scrolling between manual and automatic. 3 Press the E key to enter and save the new value. 4 Once manual has been selected the Ezetrol sets the manual mode to manual-off for both the ph and chlorine channels. To select which channel (ph or chlorine or both) you wish to run the dosing pump manually for the predetermined period of time press the s or t keys until pump Cl2 or pump ph is reached. With the desired pump displayed press the E key and use the s or t keys to scroll between off and on press the E key to enter and save the desired pump operation mode. 18

25 3.5.8 Overfeed failsafe alarm 5 The normal display will show either a circle with a small tail indicating automatic or a hammer symbol for manual control. 6 When the controller is changed from manual to automatic mode the feed delay timer is enabled and the controller will not feed until the count down timer on the display screen reaches zero. The Ezetrol is programmed to feed chemicals, when called for, only for a limited preset period. This protection minimises any further complications in the event of a blocked injector, empty day tank, split hose, failed flowswitch or failed probe. An Overfeed Failsafe condition is indicated by overfeed being shown in the alphanumeric display. Before accepting and cancelling the alarm, determine the reason for the overfeed, rectify the fault and only then press the k to restore normal dosing. 19

26 4 Commissioning 4.1 Commissioning Procedure 4.2 Flow Cell Set-Up The commissioning of this controller must only be undertaken by those engineers trained by Siemens Water Technologies. Commissioning by any other persons will invalidate the controller warranty. The contents of the Ezetrol commissioning manual describes in detail the operation and use of each of the controller s functions. To commission the controller, the requirements of each individual pool should be assessed and the relevant function of the controller adjusted accordingly, in line with the instructions. As all pools are different and require different settings, no values are given for adjustment and any pre-set value that is adjusted should be recorded. There is a Notes section in the back of the manual for this purpose. 1 Check the electrical connections and power to the controller. 2 Check that chemical tanks/co2 cylinders are full and ready for operation. 3 Set the sample flow and insert the probes. 4 Set the controller parameters to the desired values, specific to the pool s requirements. 5 Calibrate the controller. 6 Check and commission the ancillary equipment in line with relevant instructions found elsewhere. WARNING: Damage due to chemical fumes, including hydrochloric acid fumes, will invalidate the warranty. Upon completion of the entire dosing system being installed, isolate the dosing pumps and external alarms at the local point of isolation. Open the sample valves and ensure that water is flowing into the cell and out to waste or back into a valved post filter tapping. Once the cell has filled to the outlet hole half way up the rear sample cell shut off the inlet and outlet (if applicable) valves. One cap full of probe cleaning granules should be poured into the sample cell, whilst the flow is isolated, through one of the threaded holes in the top of the cell. 20

27 Remove the protective caps from the ph, chlorine and (optional) redox sensors. Screw sensors into the flow cell. The chlorine sensor has an integral lead that can not be removed from the sensor. The back nut thread on the sensor may be screwed into the flow cell without rotating the sensor or knotting the lead. There should be no air bubbles in the tip of the ph sensor. If there are remove them by gently shaking the sensor (similar to shaking a clinical thermometer). There should be no air bubbles in the tip of the (optional) redox sensor. If there are remove them by gently shaking the sensor (similar to shaking a clinical thermometer). Switch on the power isolator at the main panel or distribution board and only then switch on the controller power at the board mount isolator. The Ezetrol has a power up pre-set timer delay. After the unit is switched on a 3 minute delay timer prevents the controller operating in automatic control mode. The Ezetrol has sample water pre-set timer delay. After the flow switch engages a 3 minute delay timer prevents the controller operating in automatic control mode. After start-up, all sensors require a settling-down period of approximately two - four hours. Calibration and other adjustments should only be made after this period and automatic feed control should be switched off. The Ezetrol should not be left in automatic feed mode overnight for 24 hours after first fitting the sensors. To check the operation of the flow switch in the cell, shut off the isolation valve on the board (or on the main circulation pipe tapping). Immediately that the flow is isolated the controller should display DI in the top right hand corner of the LCD screen. In this event the output relays to the dosing pumps or feeders should also be isolated. Once the operation of the flow switch has been checked, the flow should be re-established. To check the operation of the external stop the circulation pumps, or any other external device fitted to isolate the dosing pump outputs, should be shut down. Immediately that the external stop is isolated the controller should display DII in the top right hand corner of the LCD screen. 21

28 4.3 Adjustment and Calibration 4.4 Menu Navigation In this event the output relays to the dosing pumps or feeders should also be isolated. Once the operation of the external stop has been checked, the circulation pumps, or any other external device fitted to isolate the dosing pump outputs, should be restarted. All adjustments and calibration to the chlorine, ph and (optional) redox channels are carried out using the keys on the face of the controller. The controller is divided up into a different Function Menus for various parameter settings. Navigation of the Function menus is carried out by initially pressing the F key and repeating until the desired menu is reached. The s & t keys are used the scroll through the selected menu to the desired parameter. The E key is pressed to make a change to the desired parameter and the s & t keys are used to scroll through the numerical values or the parameter text options. The E key is pressed to confirm the new value. The l key is used to exit the chosen Function menu. The navigation of the Function menus is continued by pressing the F key and repeating until the desired Function menu is reached. The l key may be pressed when at the menu function heading to return to the normal display of Chlorine, ph and (optional) redox. Whilst in the standard display the s key may be pressed and repeated to scroll though the display menu. The Function menus are broken down as described below. Calibration Chlorine Parameters ph Parameters Alarm Alarm Relay I Alarm Relay II Set Up Auto Tune Diagnostics 22

29 4.5 Access Code Although all of the functions may be accessed and read at any time, adjustment cannot be made unless the appropriate access code is first entered. There is one access code, which is pre-set with a value of 000 and therefore is not enabled. We recommend that an access code of 011 is set and enabled. To set a new access code; 1 Press the F key repeatedly until the set up function menu is displayed. 2 Press the s key repeatedly until the code definition parameter is displayed. 3 Press the E key. 4 Press the s key until the desired code is displayed. We advise that code 011 be selected. 5 Press the E key to enter the new value. 6 Press the l key to return to the Function menu heading. 7 Press the l key to return to the normal display. To access the controller once a new code has been set. 1 Press the s key repeatedly until the code?????? is displayed. 2 Press the E Key to enter the new value. 3 Press the s key until the desired code is displayed. 4 Press the E Key to enter the displayed value. 5 Press the l key to return to the normal display. The controller now has a new access code selected, the correct code input and the controller open for access. After one hour without pressing a key the value in the display menu is set to 000 and the Ezetrol is access protected. 23

30 4.6 Overfeed Protection To adjust the overfeed protection time. The Ezetrol is supplied with a default overfeed protection value of 0.1hrs (6mins). The desired overfeed limit must be assessed during commissioning and input. The overfeed limit should be set so as to provide adequate time for the action directed by the controller to pass through the pool circulation system and return to the controller flow cell, without undue time being allowed for which may cause complications in the event of a blocked injector, empty day tank, split hose, failed flow-switch or failed probe. Each and every pool will require a different setting dependant upon the time taken for the controller enter the proportional band from a low chlorine or high ph level. From normal operating display (with the actual chlorine and ph readings on the screen). 1 Press the F key until the text on the screen reads SET UP. 2 Press the t key until the display reads overfeed delay. 3 Press the E key to access overfeed delay parameter. 4 Press the s or t keys until the overfeed delay value is displayed. The range is 0.1 to 10 hours in 0.1hour increments. 5 Press the E key to enter and save the new value. 6 Press the l key twice to return to the normal operating display. 4.7 Proportional Control of On/Off Solenoid & Motor Driven Dosing Pumps. The pump is switched on, within the variable duty cycle (or proportional time base), for a calculated switch-on (relay contact) time. The duty cycle depends mainly on the reaction time (process time) of the particular swimming pool. The default is set at 60 seconds. Example: Duty Cycle (Tp) = 100 seconds. Output Value (Y out) = 30% Switch-on Time = 30 seconds. Switch-off Time = 70 seconds. 24

31 On Off To select the Dosing Pump Type 4.8 Solenoid Pulse Pumps The following controller parameters can be set with the controller: Xp (%) Proportional factor % Tn (sec.) Integral action time minutes. Tp (sec.) Duty cycle seconds The dynamic behaviour of the controller is adjustable via parameters Xp and Tn. This permits the adaptation of the controller to different lag times of the pool circulation system. NOTE: With the Integral Action Time (Tn) set to zero (0) minutes the chlorine controller will work as a proportional only controller. From normal operating display (with the actual chlorine and ph readings on the screen). 1 Press the F key until the text on the screen reads Cl2 Menu or ph Menu. 2 Press the t key until the display reads control output. 3 Press the E key to access pulse selection parameter. 4 Press the s or t keys until the required choice is displayed. The choices are pump or pulse pump. Your choice will be dependent upon the type of pump selected. 5 Press the E key to enter and save the new value. 6 Press the l key twice to return to the normal operating display. Solenoid pulse pumps are controlled to regulate the feed rate between 0 to 100 or 120 pulses per minute in proportion to the measured value, the set point and the control parameters. For both pulse pump options (100 or 120 pulses/min) the on-time of the pump is 0.25 seconds and the off-time is set between 0.25 and 60 seconds depending on the desired feed rate. 25

32 Example: Output if 120 pulses/min. is selected Y out in % Pulses/min The following controller parameters can be set for use with solenoid pulse pumps: Xp (%) Proportional Factor % Tn (min.) Integral Action Time min To adjust the output selection for solenoid pulse pumps NOTE: This option will not be available if the Pulse Pump option has not been made under the type of pump parameter. From normal operating display (with the actual chlorine and ph readings on the screen). 1 Press the F key until the text on the screen reads Cl2 Menu or ph Menu. 2 Press the t key until the display reads max. pulses/min. 3 Press the E key to access pulse selection parameter. 4 Press the s or t keys until the required value is displayed. The choices are 100 or 120 pulses per minute. Your choice will be dependent upon the type of pump. 5 Press the E key to enter and save the new value. 6 Press the l key twice to return to the normal operating display. 4.9 Bi-directional ph Control - (control of ph- and ph + dosing pumps) Dosing pump 1 = ph- Dosing pump 2 = ph+ When the setpoint is achieved the dosing pumps will both be off and within the neutral zone. The control parameters are active on both pumps and both directions.. 26

33 Proportional factor Xp (%) % Neutral zone 0-5% Bi-directional ph control works like a simple proportional controller. Output signal 100% -100% 0% Xsh Dosing pump 1 Dosing pump 2 Dosage rate Adjusting the bi-directional neutral zone -100% Xsh Neutral Zone (only bi-direction ph controller, adjustable 0-5%) There is no control signal if the signal is lower than the adjusted value for Xsh. This neutral zone prevents the acid and alkaline pump being run at the same time and avoids the ph 'bouncing' around the setpoint due to the action of the pumps. When this parameter is set to 1%, the neutral band will be 0.05pH. From the normal operating display (with the actual chlorine and ph readings on the screen). 1 Press the F key until the text on the screen reads 'ph Menu'. 2 Press the t key until the display reads 'neutral zone'. 3 Press the E to access the proportional factor parameter. 4 Press the s or t keys until the requires neutral zone value is displayed. The range is 0% to 5% in 1% increments. 5 Press the E key to enter and save the new value. 27

34 4.10 Proportional Factor (Xp) 6 Press the l key twice to return to the normal operating display. The proportional factor (Xp) increases or decreases the rate of the dosing pump output in proportion to the deviation between the set point and the actual reading. In order to provide the most precise output control in response to any deviation from set point the Ezetrol takes into account the set point, actual value and proportional factor to control the dosing pump. The pump output is then calculated as a percentage of the run time in seconds. For example the percentage pump output is calculated from the deviation of the actual; reading from the set point multiplied by the proportional factor, or: Deviation % x Xp Factor = Pump Output % Where: Deviation mg/l Deviation % = x 100% Full Scale Control Xp Factor = (1/Xp) X 100% Full Scale control = Set Point X 2 For a pool with: Set Point (mg/l) 1.50 Actual reading (mg/l) 1.40 Xp 10% The pump output would be calculated as: Deviation = = 0.10mg/l 0.1 mg/l Deviation % = x 100% = 3% 3.00 mg/l Proprtional Control (Xp) factor = (1/10) x 100 =

35 Full Scale Control 1.5mg/l x 2 = 3.00 Therefore pump output % = 3% x 10 = 30% Adjusting the proportional factor (Xp) 4.11 Integral Action Time (Tn) For a 60 seconds time base 30% = 18 seconds On and 42 seconds Off Effect: The smaller the proportional factor (Xp), input as a percentage, the faster the pump output increases as the actual value deviates from the set point. The larger the proportional factor (Xp), input as a percentage, the slower the pump output increases as the actual value deviates from the set point. The proportional factor (Xp) can be changed within the range of 1% to 1000%, the default setting is 10%. It is not recommended that this value is set above 15% or below 10% without first consulting the Technical Help Desk. From normal operating display (with the actual chlorine and ph readings on the screen). 1 Press the F key until the text on the screen reads Cl2 Menu or ph Menu. 2 Press the t key until the display reads proport. Factor. 3 Press the E key to access proportional factor parameter. 4 Press the s or t keys until the required proportional factor value is displayed. The range is 1% to 1000% in 1% increments. 5 Press the E key to enter and save the new value. 6 Press the l key twice to return to the normal operating display. This feature is only available on the chlorine channel. With the Integral Action Time (Tn) the controller can continuously increase the dosing capacity of the pump with constant control deviation until the set point is reached. The longer the selection of Integral Action Time (Tn) in minutes, the longer the period until the metering pump increases its dosing capacity. 29

36 The increase of the dosing capacity depends on the control deviation and on Proportional (Xp) and Integral Action Time (Tn) values. The Integral Action Time (Tn) parameter is adjustable minuets when the Integral Action Time (Tn) is set a 0-minutes the integral component is switched off and only the proportional parameter is active. Example: Control deviation Xd* = 20 % Proportional factor Xp = 100 % Integral action time Tn = 5 min The controller starts with 20% dosing capacity (P-component =Xp Xd). If the control deviation is not reduced, then the controller will continuously increase the dosing capacity by 20% every five minutes. Therefore the maximum dosing capacity of 100 % is achieved within 20 minutes. *The deviation is calculated as: setpoint - actual reading Xd = x 100 % full scale range NOTE: The Ezetrol has a fixed full-scale range of 10 mg/l. Dosing Capacity 100% 80% 60% 40% I-component 20% P-component Tn Tx Minutes Adjusting the integral action time (Tn) From normal operating display (with the actual chlorine and ph readings on the screen). 1 Press the F key until the text on the screen reads Cl2 Menu. 30

37 2 Press the t key until the display reads integr. act. Time. 3 Press the E key to access integral action time parameter. 4 Press the s or t keys until the required Integral Action Time value is displayed. The range is 0 (off) to 200 minutes in 1minute increments. 5 Press the E key to enter and save the new value. 6 Press the l key twice to return to the normal operating display. 31

38 5 Menu Overviews 5.1 Display Menu Default values are shown in bold type. Display Range Description 1.50 mg/l xxx ph 800 mv Measured values, units (Basic display) (xxx) count down time for "feed delay" in seconds; default 180 s (**) symbol "automatic / manual" - mode pump Cl 2 setpoint Cl2 pump ph setpoint ph 7.50 ph Man. run time Mode Menu Code ON, OFF mg/l (1.50 mg/l) ON, OFF ph (7.50 ph) h 0.1 h (6 minutes) automatic manual concise extended Manual operation of dosing pump Cl 2 (unless automatic is selected) Chlorine Set Point Manual operation of dosing pump ph correction (unless automatic is selected) ph Set Point Run time for the pumps when in manual mode Operation mode The selected mode is displayed with symbols (circle = auto., hammer = manual) Menu length Selection of the menu length; - Concise menu: Display and calibration menus only - Extended menu: All menus are displayed Code Entering of the code-number If the access code value displayed is not the same as in the value input in the 'codedefinition' parameter, no changes to the Ezetrol settings may be made.. "code???" appears in the display if access is attempted without correct code number. The code menu disappears if the 'codedefinition' value is set to

39 5.2 Calibration Function Menu Calibration adjustments are made in this menu. Default values are shown in bold type. NOTE: The control output is frozen during calibration. The ma output is frozen, if the hold function in the Set-Up Menu is active. Display Range Description Cl2 zero 0.00 mg/l Chlorine zero calibration Press the E key to calibrate to 0.00 mg/l Chlorine DPD calibration Cl2 DPD Enter the value measured by DPD with the s and mg/l t keys. Press the E key to calibrate to this value calibration ph calibration mv samp. water temp ph 834 mv -10 C +50 C (30 C) ph calibration Press the E key to enter the calibration function. If necessary press the s or t key to adjust to ±1.0 ph unit. Redox calibration Enter the value of the buffer solution with the s and t keys. Press the E key to calibrate to this value Temperature for the compensation Press the s and t keys to enter the sample water temperature. The temperature is used for the automatic ph correction. 33

40 5.3 Cl2 Parameter Function Menu Chlorine channel Adjustments are made in this menu. Default values are shown in bold type. Display Range Description control output Proport. factor integr. act time Max. pulses/min duty cycle pump sol.pump 1% 100% (10%) min (20.0 min) sec. (60 sec) Selection of the control output for chlorine feed: pump = for on/off solenoid and motor driven dosing pump pulse. pump: = for solenoid dosing pumps The following menu options depend on the selection in this menu) Control-gain (Xp) Proportional factor of the Cl2 controller 1% means factor 100 (high gain) 10% means factor 10 (medium gain - default value) 100% means factor 1 (low gain) Integral-action time (Tn) Integral action time of the Cl2 controller If 0.0 min is entered, the integral component is switched off, the controller works as a pure P-controller. Maximum pulses per minute According to the design of the ph correction solenoid pump. NOTE: Only if pulse. pump is selected. Adjustment of the operating cycle (Tp) This adjustment is only possible with normal motor pumps. 34

41 5.4 ph PARAMETER Function menu ph channel adjustments are made in this menu. Default values are shown in bold type. Display Values Description control output proport. factor max. pulses/min duty cycle neutral zone control direct.. pump pump bi-direct pulse. pump pulse. pump bi-direct 1% 100% (10%) s 180s (60s) 0-5% 1% ph+ corr. ph- corr. Selection of the control output for the ph correction pump: for on/off solenoid and motor driven dosing pump pump bi-direct: for 2 motor dosing pumps (ph+ and ph-) pulse.pump: for solenoid dosing pump pulse. pump bi-dir : for 2 solenoid dosing pumps (ph+ and ph-) (Some function menu options may not be available depending upon the selection made in this menu.) Control-gain (xp) Proportional factor of the ph controller 1% means factor 100 (high gain) 10% means factor 10 (medium gain - default value) 100% means factor 1 (low gain) Maximum pulses per minute According to the design of the solenoid pump NOTE: only if pulse. pump is selected Adjustment of the operating cycle Tp This adjustment is only possible with normal motor pumps Adjustment of the neutral zone Xsh between acid and alkaline dosing; (1% = 0.05 ph) Note: This menu option is only displayed when bi-directional dosing is enabled Control direction of the acid or alkaline dosing. ph+ : Only alkaline dosing pump is connected. The alkaline increases the ph value. ph- : Only acid dosing pump is connected. The acid reduces the ph value. NOTE: This menu option is not displayed when bi-directional dosing is enabled. 35

42 5.5 Alarm Function Menu Alarm limits adjustment are made in this menu. Default values are shown in bold type. Display Range Description Cl2 max Full range 5.00 mg/l Maximum limit for chlorine level Cl2 min Full range 5.00 mg/l Minimum limit for chlorine ph max Full Range 8.00 ph Maximum limit for ph ph min Full Range 7.00 ph Minimum limit for ph redox max Full Range 900mV Maximum limit for Redox (option) redox min Full Range 600 mv Minimum limit for Redox (option) NOTE: This menu only defines the operator defined alarm limits. The alarm output relays may not have been configured to operate for certain user-defined alarm conditions. The swim-safe alarm indicates a general alarm condition based upon the above alarm limits. 36

43 5.6 Alarm-Relay 1 Function Menu Alarm relay I adjustments are made in this menu. Default values are shown in bold type Display Range Description Cl2 max Assignment of Alarm relay 1 Cl2 min (see below) ph max ph min relay asign. [ ] Redox max Redox min sample water alarm: flow detection switch N.C. contact samp. wat. al. ext. STOP: Circulation pump stop signal ext. STOP relay function alarm delay N.O. not latched N.O. latched N.C. not latched N.C. latched 0-10 hours 0.1 hr (6 minutes) Alarm-Relay 2 Function Menu Relay operation N.O.: normally open, closed in case of alarm. N.C.: normally closed, open on case of alarm If latched is selected, the alarm relay is latched and must be reset with the key. Delay time before the relay is activated The alarm is displayed as soon as the alarm value has been exceeded however, the relay may be delayed for a userdefined period of time. The time delay feature includes an automatic retrigger function Alarm relay 2 is identical in selection options and programming as Alarm relay 1. The two alarm relays may be set to energise for either the same or differing alarm conditions. This allows for differing alarm types to activate upon different alarm conditions. 37

44 5.6.1 Setting a Relay Assignment relay asign. [ ] in above menu Display Action Remark relay asign. press key E Open the menu [ ] Cl2 max relay asign. >[] Cl2 max relay asign. >[3] Cl2 max relay asign. >[ ] ph max [ ] ext. STOP > save E scroll up or down press key E s & t keys t keys Scroll through the lis of options with the s and t keys until the desired parameter is displayed,'>' indicates the current parameter option A '3' will appear confirming the selection To deselect press key 'E' again Select the other alarm parameters To store the selected alarm parameters scroll the '>' to the lower line by pressing the t key and save the changes with the 'E' key 38

45 5.7 Set Up Function Menu General Ezetrol option adjustments are made in this menu. Default values are shown in bold type Display Values Description feed delay overfeed delay samp. water delay hold function language ma output ma signal Display select RS485 addr. Cl2 RS485 addr. ph RS485 addr. Red. code definition minutes 3.0 minutes 0-10 hours 0.1hr (6 minutes) 0-10 min (0 min) ON OFF German, English, French, Italian, Spanish,Portuguese, Greek ON OFF ma ma Cl2, ph, Redox When activated a count down, shown seconds, will be shown in the main display if: Manual to automatic control mode is selected. Power on (start up). Digital IN 1 or 2 (flow switch or external stop input) is detected Isolates the dosing output relays if permanent 100% dosing ON time exceeds the input value. Note: this feature is only enabled in automatic dosing mode. Flow switch alarm delay time. The flow switch alarm delay time allows for dosing to continue even when flow has stopped for the period of time selected. If the hold function ON is selected, the ma output is frozen during calibration Available languages of the menu tree ma output If selected, it must be connected (R 1 kohm). Otherwise the error *ma 1/2/3* is displayed ma output signal selected Selection of the measured values to be displayed. Selection according to the version , (00) Address in the RS485 bus for the Cl2 value , (01) Address in the RS485 bus for the ph value , (02) Address in the RS485 bus for the Redox value A user-defined access code is available. Once input the correct code must be input before any Ezetrol modifications may be made. After one hour without pressing a key the value in the code menu is set to 000 and the Ezetrol is protected. 39

46 Display Values Description brightness 5.8 Auto Tune Menu 0-100% (30%) Adjustment of the display contrast The backlight of the display can be adjusted in the range from 0 to 100% NOTE: In a bus system, no addresses can be duplicated. In this menu path the parameter Xp and Tn can be calculated by the manual input of the lag time (Tu) and rise time (Ts) of the chlorine control loop. The Ezetrol includes a program that can automatically determine the control loop time. (See below 'auto tune' start). NOTE: The parameters forthe ph control remain unchanged. Default values are shown in bold type. Display Values Remark lag time Tu rise time Ts auto tune sec (3600 sec = 60 min.) min (480 min = 8 hrs) start Process time (Tu) of the control loop. Every time the Tu value is changed and stored with the E key, then the parameters proportional (Xp) and integral action time (Tn) are newly calculated. For the calculation the actual value of the rise time (Ts) is used. After a finished auto tune process the determined value of the lag time is shown in this menu. Raise time(ts) of the control loop Every time the Ts value is changed and stored with the E key, the parameters Xp and tn are newly calculated. For the calculation the actual value of the lag time tu is used. After a finished auto tune process the determined value of the rise time is shown in this menu. Auto tune start Menu to start the adaption (auto tune). This menu will end only after a complete auto tuning or an adaption break. After a successful adaption the parameter Xp, Tn, Tu and Ts will be updated. After the auto tuning the controller runs in the selected mode. If you start the adaption from the automatic mode, the unit will change to the automatic mode again. 40

47 5.9 Diagnostic Menu Internal measurements and controller status are displayed in this menu. Display cell current µa cell current µa/mg/l ph electrode mv mv electrode +800 mv rel: st: interval RS485 ***Reset*** Ezetrol V:A10/ Remark Displays the actual current, in µa, of the chlorine probe Typical values: 0.00 mg/l chlorine = 0 µa (approx) 2.00 mg/l chlorine = 15 µa (approx) Displays the actual current, in µa/.mg/l, of the chlorine probe Typical value: 6-8 µa/ mg/l (sensitivity per mg/l) Displays the ph actual probe/voltage Typical values: 0 mv = ph7-56 mv = ph8 Displays actual Redox probe voltage States of the relays When the relay is activated : '1' is displayed. Assignment of the relays (referring to the wiring diagrams also) 1: Chlorine relay K1 2: Chlorine relay k2 3: Relay ph increase K3 4: Relay ph reduce (decrease) K4 5: Alarm 1 relay K5 6 Alarm 2 relay K6 Calibration Interval Period Display of the operation hours since the last DPD, ph or Redox calibration. Ezetrol is shut down, the timer continues Maximum value: 2000 hours, approx. 84 days Communication via RS485 interface During communication, requests are displayed with 'RxD' and answers with 'TxD'. (RESET) Pressing the E key to restart the unit. DO NOT RESET THE EZETROL WITHOUT PRIOR CONSULTATION WITH TECHNICAL SUPPORT Indicates the software version and date code. 41

48 6 troubleshooting guide 6.1 Ezetrol Appears to be 'Dead' The Ezetrol has been manufactured to the highest possible quality standards. However, as with all electronic devices there may be times when a malfunction occurs. The following guide should help solve any problems that might arise. Please note that under the 1989 Electricity at Work Act only suitably qualified personnel may carry out certain items below; these include electrical supply corrections and troubleshooting. An asterisk highlights such items, although it is not limited to just those highlighted. Remeber if contacting Stranco Products ( ) please give the fullest possible details of the controller model, the lights illuminated (or not illuminated), the readings from the controller, the pool and the sample cell, so you receive the best advice available with the information given. cause External power supply failure Internal power failure remedy Check power indication lamp. Check supply fuse/circuit breaker*. Check supply isolation switch.* Check power indication lamp. Check the main internal fuse.* 6.2 Alarm Lights Flashing ph High Alarm (ph- units) Check the alphanumeris display for the specific alarm condition and refer to the following for further guidance. cause Acid pump not delivering chemical ph sensor tip not filled with fluid Faulty sensor Feed relay remedy Check correct operation of dosing pump. Check that there is sufficient chemical in the day tank. For CO 2 systems check gap meter solenoid and cylinder content. 'Shake down' sensor and reinstall. Replace sensor. Check ph feed relay by selecting manual pump operation in 'ON' mode. 42

49 6.2.2 ph Low Alarm (ph- units) cause ph sensor tip not filled with fluid Faulty sensor Chemical siphoning remedy 'Shake down sensor and reinstall. Replace sensor Check by turning off the pump and marking the day tank level. If the level drops without the dosing pump running, fit a 4-function valve to prevent siphoning ph Low alarm (ph+units) cause remedy Soda Ash pump not delivering chemical Check correct operation of dosing pump. Check that there is sufficient chemical in the day tank. For CO 2 systems check gap meter solenoid and cylinder content. ph sensor tip not filled with fluid 'Shake down' sensor and reinstall. Faulty sensor Feed relay ph High Alarm (ph+ units) Replace sensor. Check ph feed relay by selecting manual pump operation in 'ON' mode. cause ph sensor tip not filled with fluid Faulty sensor Chemical siphoning remedy 'Shake down sensor and reinstall. Replace sensor Check by turning off the pump and marking the day tank level. If the level drops without the dosing pump running, fit a 4-function valve to prevent siphoning ph Overfeed Alarm cause Dosing pump feeding for longer than timer limit remedy Check correct operation of dosing pump. Check that there is sufficient chemical in the day tank. Check that turnover period does not exceed overfeed timer setting. 43

50 6.2.6 No ph Feed cause Feed alarm Controller in proportional feed mode. Feed relay remedy See above No action required providing the controller near setpoint and ultimately reaches the setpoint. CheckpH feed relay by selecting manual pump operation in 'ON' mode. 6.3 Constant ph Overdosing cause Ezetrol is out of calibration The setpoint is too high Dosing pump set too high remedy Follow calibration instructions. Verify the setpoint is correct. Adjust output, as set out elsewhere, and monitor. 6.4 Inaccurate ph Readings cause Ezetrol needs calibration Inaccurate test kit readings Faulty sensors remedy Refer to calibration instructions. Refer to test kit manufacturer's recommendations. Ensure the test kit is clean and in full working order. The samples are not being contaminated with other samples and that the tablets are not out of date. Replace sensors. 6.5 Chlorine High Alarm cause Chemical siphoning Ezetrol requires calibration Faulty probe remedy Check by turning off the pump and marking the day tank level. If the level drops without the dosing pump running, fit a 4-function valve to prevent siphoning. Refer to calibration instructions. Replace probe. 44

51 6.6 Chlorine Low Alarm cause remedy Chlorine pump not delivering chemical Check correct operation of dosing pump. Check that there is sufficient chemical in the day tank. Ezetrol needs calibration Refer to calibration instructions. Faulty probe Replace probe. 6.7 Chlorine Overfeed Alarm cause Dosing pump feeding for longer than timer limit remedy Check correct operation of dosing pump. Check that there is sufficient chemical in the day tank. Check that the turnover period does not exceed the overfeed timer setting. 6.8 No Chlorine Feed cause Feed alarm Controller in proportional feed mode Feed relay remedy See above. No action required providing the controller near setpoint and ultimately reaches the setpoint. Check chlorine feed relay by selecting manual pump operation in 'ON' mode. 6.9 Constant Chlorine Overfeed cause Ezetrol out of calibration The setpoint is too high Dosing pump set too high remedy Refer to calibration instructions Verify the setpoint is correct. Adjust output, as set out elsewhere, and monitor. 45

52 6.10 Inaccurate Chlorine Reading cause Ezetrol needs calibration Inaccurate test kit readings Faulty sensors remedy Refer to calibration instructions. Refer to test kit manufacturer's recommendations. Ensure the test kit is clean and in full working order. The samples are not being contaminated with other samples and that the tablets are not out of date. Replace sensors No Output To Remote Alarm (If fitted) Alarm relay cause remedy Check alarm relay by switching off the flow and check that a voltage is output from the relay terminals Intermittent Controller Faults cause Power spikes Inconsistent readings Readings intermittently not the same as test kit procedure remedy Check that the incoming power supply to the building is clean. Check that the timer controlled plant is not causing a phase imbalance upon start up. This may be normal for a pool of low volume and high pollution content. Monitor and contact Stranco Products ( ) if the problem persists. Voltage leak into the sample cell from external source. Check that there is not a variance of over 5 C in the water temperature flowing though the sample cell. Check manual test kit and operator testing. 46

53 7 warranty Stranco Products warrants the Ezetrol be free of defects in workmanship and material. Stranco Products liability under this warranty extends for a period, as noted below, from date of delivery from our factory or authorised distributor. It is limited to repairing or replacing any device or part which is returned, transportation prepaid, to the factory for a period, as noted below, to the original Purchaser and which is proven defective upon examination. Warranty Schedule; Ezetrol Controller ezetrol flow cell and flow switch Ezetrol chlorine, ph & Redox sensors and leads All other items 18 months 18 months 18 months 12 months Stranco Products disclaims all liability for damage during transportation, for consequential damage of whatever nature, for damage due to handling, installation or improper operation and for determining suitability for the use intended by the Purchaser. Stranco Products makes no warranties, either expressed or implied, other than those stated above. No Representative has authority to change or modify this warranty in any respect. 47

54 8 Timer Increment Example The ezetrol uses a timer processor which generally breaks the time down to 0.1 hour increments. The chart below may be used as a guide to convert the display increments into real time. Display Real Time hrs 6 minutes hrs 12 minutes hrs 18 minutes hrs 24 minutes hrs 30 minutes hrs 36 minutes hrs 42 minutes hrs 48 minutes hrs 54 minutes Display Real Time hrs 6 minutes hrs 18 minutes hrs 24 minutes hrs 30 minutes hrs 36 minutes hrs 42 minutes hrs 48 minutes hrs 54 minutes hrs 12 minutes 48

55 Control equipment (Ezetrol) S s F l t E Drain Dinofloc Injection Point Typical Swimming Pool Filtration Equipment Dinofloc Dosing set Return to Circulation Flow (Optional) Drain Heat Exchanger Chlorine Injection Point Chlorine Dosing set Acid Injection Point Acid dosing set Fig.1 Ezetrol Typical Installation (PSK347) 49

56 L1 L2/N L1 L2/N OFF OFF Upot LIVE IN NEUTRAL IN EARTH IN Cl 2 ph- ph+ alarm alarm disinf. corr. corr. 1 2 flow B A Rt Ru Rd switch RS485 terminator Bus RD WH BU BK ph Red. WRK REF CNT Cell Chlor ext. STOP mA 4-20mA 4-20mA ma-out ma Out ma-out TERMINAL CONNECTION TERMINAL CONNECTION 1/2 LIVE FROM ISOLATOR 33/34 FLOWSWITCH CONNECTION 3/4 NEUTRAL FROM ISOLATOR 35/36 EXTERNAL STOP CONNECTION 5/6 EARTH FROM ISOLATOR 37/38 RS485 CONNECTION 7/8 POWER (LIVE) TO PUMP RELAYS 41/42/43/44 CHLORINE PROBE CONNECTION 9/10 NEUTRAL TO PUMP RELAYS 49/50/51 ph PROBE CONNECTION 11/12 EARYH OUT CONNECTION 55/56/57 REDOX PROBE CONNECTION 16 LIVE SUPPLY TO RELAY 45/46 CHLORINE 4-20mA OUTPUT 18 CHLORINE PUMP LIVE SUPPLY 52/53 ph 4-20mA OUTPUT 19 LIVE SUPPLY TO RELAY 58/59 REDOX 4-20mA OUTPUT 21 ph- PUMP LIVE SUPPLY 22 LIVE SUPPLY TO RELAY 24 ph+ PUMP LIVE SUPPLY 25 ALARM 1 RELAY (NO) 26 ALARM 1 RELAY COMMON 27 ALARM 1 RELAY (NC) 28 ALARM 2 RELAY (NO) 29 ALARM 2 RELAY COMMON 30 ALARM 2 RELAY (NC) Fig.2 Ezetrol Connection Diagram (EP00062A) 50

57 Key Part No. QTY Description 01????? 1 Ezetrol controller complete Mounting board ½" P/T skt. PVC ½"-¼" P/T red bush PVC ¼"-1" red adapt PVC "-½" P/P red bush PVC /16" straight hose con X 1 ½" sample strainer comp ¼" ball valve chrome Isolator mm conduit con straight Probe cleaner A 4 Backboard spacer ½" P/P ball valve PVC 15-1 Basic operating instructions CO2 hose (30m coil) ½" P/T nipple PVC ½" maclow clip 19 AAB PG 11 gland blank 20 AAB PG9 gland blank IMPORTANT: When ordering spare parts quote machine serial number together with full description and part number. 51

58 S s F l t E Fig.3 Ezetrol Single Board Mount (50208) 52