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2250e MANUAL - Lakewood Instruments

1. 1268648 2a 10 2 Plumbing Diagram 1268648 3a 10 3 Plumbing Diagram Continuous or Sample Cycle 1268647 5a 10 4 Wiring Diagram Sensor 67909 10 5 Wiring diagram for water meter inputs 1104607 10 6 Electrical endete uc e 1268647 1a 10 7 gt 1268647 2 10 8 Wiring Diagram RS2L ERE ER 1169899 10 9 Wiring Diagram RS2L 1169900 10 10 Wiring Diagram 4 20 mA output 35 69954 10 14 Wiring Diagram NINKODIOT hte 04263 1 0 INTRODUCTION The Model 2250e is LoNWonks Technology microprocessor based menu driven conductivity water treatment controller designed for use in boilers The Model 2250e provides for conductivity tracking and control flow monitoring and chemical injection The Model 2250e is CSA and ANSI UL approved The Model 2250e uses the latest in microprocessor capability giving the user a high level of application flexibility A large illuminated graphics screen multiple inputs and an intuitive menu characterize this new technology Security features allow full access to
2. 47 5 5 7 4 2 Anti Steam FIasli incision eerie 44 6 5 7 1 3 Preamp SeLUlp ss 44 6 5 7 1 4 Temp Compensation 44 6 5 7 1 5 GellGornslalllz 44 6 5 7 2 InItallZatloft aedi ctos 49 6527 3 Digital tan eon ten scenic nf diete 49 6 5 7 4 Firmware Versions sa eodd ce adi 50 6 5 7 5 Change the Security 5 50 6 5 7 6 Diagnostics iei ree preti Ie Dor o re eo I pete er rete pli 50 6 5 7 7 Communications 51 6 5 7 7 1 Com Port Selup oa e Decr phare tad anat 51 6 5 7 7 2 Initialize 52 6 5 7 7 3 Remote 52 6 5 7 8 Node 52 6 5 8 Selling INS C IDOK a a ae ausente 53 6 5 9 Changing the Security 54 petu utu 55 ACA A 55 7 2 Replacing the FUSE 55 8 0 Troubleshooting aote det 56 B LErrepMessadeSs o om mU A 56 9 0 Factory SEIWICE o eo ti cui Gad eile tee 58 10 0 Drawings 10 1 Plumbing Diagram
3. 25 6 3 Calibration of CONDUCTIVITY 26 ANG AIIDIAUOM ee TEE 26 6 3 1 1 Calibration in the continuous sample mode 26 6 3 1 2 Calibration in the sample cycle mode 26 6 3 2 Calibration Check in Buffer 27 6 3 3 CondicliVity vs PE ped p PE E EE 28 D c rut Rotator or uto AO oH OHIO 29 p 5 Relays 30 6 5 1 Configuring the Blowdown 30 6 5 1 1 30 6 5 1 1 1 Setpoint 31 p 512 Deadband is et 31 6 5 1 1 3 Blowdown 31 6 5 1 1 4 When to Activate 32 6 5 1 2 Boiler 32 6 5 1 2 1 Setting up for Sample Cycle Control 33 6 5 1 2 2 Setting up for Continuous Sample Control 34 6 5 1 3 Change oho dede er eee reae 34 6 5 2 Configuring Relays 2 3 Ae cree 35 6 521 DISA EC DR RETE 35 65 2 2 SCION eis
4. 6 5 2 3 By Water Meter Relays 2 3 and 4 can be configured to operate for a specified amount of time based on a specified amount of flow through the water meter inputs MTR1 MTR2 or the sum of BOTH water meter inputs can activate the relay From the RELAY OPTIONS screen press 3 WATER METER Select either MTR1 or MTR2 or BOTH as the trigger for the relay Use the keypad to enter the amount of flow before the relay is activated Press ENT Enter the amount of time that the relay will be activated Press ENT 6 5 2 4 By Percent of Blowdown Relays 2 3 and 4 can be configured to operate for a percentage of the amount of time that the blowdown relay was in operation Once the blowdown relay turns off the configured relay will turn on for the specified percent of time that the blow relay was on For instance if 5096 was set and the blow relay was on for 6 minutes the relay will turn on for 3 minutes after the blow relay turns off From the RELAY OPTIONS screen press 4 PERCENT BLOWDOWN Use the keypad to enter the percent of blowdown time for the relay to be activated Press ENT 37 6 5 2 5 By Percent of Time The Percent of Time feature allows you to feed chemical strictly based by a percent of time This relay control scheme works in patterns of 20 second time blocks A relay is on for some multiple of 20 seconds and off for some multiple of 20 seconds Below is a chart showing how Percen
5. If the model 2250e has any remote sensor nodes attached the 4 20 mA channel can be configured to operate based on that input From the 4 20 mA Setup screen press 3 WHICH PROCESS Use the up and down arrow keys to select the process that will control the 4 20 mA output Press ENT 46 6 5 6 1 4 Manual Control Manual control is used to temporarily change the 4 20 mA output From the 4 20 mA Setup screen press 4A MANUAL CONTROL Use the up and down arrow keys to raise or lower the 4 20 mA output To exit this screen press CLR 6 5 6 1 5 Change My Name The name of the 4 20 mA output can be changed by the operator From the 4 20 mA Setup screen press 5 CHANGE MY Use the arrow keys to change the characters use the ENT key to move the cursor to the next character 6 5 7 The System Setup Menu The system setup menu is used to set up the temperature compensation damping initialize the controller digital inputs check the firmware version change the security passwords check the diagnostics set up the communications and node installation 6 5 7 1 Process Parameters The process parameters screen is used to change the name of the conductivity process set up anti steam flash set the preamplifier settings set up the temperature compensation and set the cell constant 6 5 7 1 1 Change My Name The name of the process can be changed from COND to a different 4 character
6. TEL AMD TAS 4 RELAY CONTACTS RATED 1 60 1S SH 240 wAL INSTRUMENTS ELECTRIGAL SCHEMA TIS 2000 SERIES NEMA ENCLOSURE 11122 ern TE DO NOT SCALE prr qug verior j EH CTHERVWEE SPECIFIED DARD FOUR TELEPHON UP dO So FEET LEMGTH DE AEMT HAYE COHPATISLE KECE 25 CONNECTOR SHH DEDICATED TELEPHONE UNE E LAYOUT TO 250 UEM 2000 DO MOT PLUG ESIL DIRECTLT INTO TELEPHONE LINES ur 4 6 UNLESS OTHERWISE SPECIFIED STANDARD FOUR CONDUCTOR TELEPHONE CABLE UP 50 FEET IN LENGTH MAY BE SUBSTITUTED PERSONAL COMPUTER WITH MODEM 1 8799 1 ET OM 3 LES eC 1111 533 AED PCR S558 unum um DE 2 a gt LAUS 5232 CONNECT TO PNR usnm T um EL omm DO NOT PLUG RS2L DIRECTLY INTO TELEPHONE LINBS NOTES UNLESS OTHERWISE SPECIFIED 1 LOADS MUST SE LESS THAN 6009 4 20 OUT 4 20 3 2 20m OUT 4 20 20 OUT 4 20 OUT INTERNAL POWER OPTIONAL EXTERNAL 24 YDC SUPPLY 4 20 on
7. NIN Network interface node Allows 2 NRLY 1 Makeup NCON 4 sensor nodes NpH or 2 4201 and or 2 NDIG to be added SENSOR OPTIONS recommended select one below SR2 Boiler water sensor inch NPT and elbow Rated to 486 F 600 psi cannot be used after a sample cooler SR4 4 electrode sensor 34 inch NPT Rated to 392 F 250 psi For use with a sample cooler LANGUAGE OPTIONS optional choose one English and Spanish Standard EF English and French EG English and German REMOTE NODE OPTIONS optional MUST purchase NIN Option NRLY Four additional relays with enclosure 2 allowed per 2000 Series Controller NpH pH ORP node for a pH or ORP sensor 4201 4 20 input node for up to 4 4 20 ma inputs NDIG Digital input node for up to 4 digital inputs NCON Conductivity node for makeup water or closed loop control node only NCKT Conductivity node for makeup water or closed loop control with PVC sensor tee and enclosure Maximum water pressure is 140 psi 100 Maximum temperature is 140 F NOTE NOT FOR USE WITH MULTIPLE COOLING TOWERS SOFTWARE AND EXTERNAL MODEMS LRWS Windows based software for computer to communicate with 2000 Series Controllers MD4X High Baud modem in NEMA 4X enclosure ready to power MD High Baud modem for use with 2000 Series Controllers 12 3 0 Unpacking Mounting and Installation 3 1 Unpacking Inspect the shipping carton for obvious exter
8. 5 REMOTE SENSOR 6 REMOTE SENSOR 7 REMOTE SENSOR 8 REMOTE SENSOR 9 ANALOG INPUTS 4 10 ANALOG INPUTS 4 11 DIGITAL INPUTS 4 12 DIGITAL INPUTS 4 e Select the alarms from this menu that will activate the relay 39 6 5 2 8 The name of each individual relay be changed to 4 character name This is useful to designate the chemical name for each relay Use the arrow keys to change the character and the ENT key to move to the next character OLD NAME RLY2 NEW NAME INH lt UP gt lt DOWNSENT ACCEPT From the RELAY OPTIONS screen press 7 CHANGE MY 40 6 5 3 Setting up Feed Schedule Refer to section 6 5 2 5 to configure a relay to feed based on the feed schedule before continuing with this section To get to the feed schedule menu From the MAIN MENU press 3 FEED SCHEDULE You will see the following screen FEED SCHEDULE 1 BY WEEKDAY 2 BY CYCLE CALENDAR 3 LIST SCHEDULE The feed schedule can be programmed to feed chemicals by either WEEKDAY or by a CYCLE CALENDAR basis BY WEEKDAY is used to feed chemicals by the weekday name i e Monday Tuesday Wednesday etc This is a seven day schedule At the end of the week the schedule starts over again To configure the feed schedule to feed by weekday From the FEED SCHEDULE screen press 1 BY WEEKDAY BY CYCLE CALENDAR is used to feed chemicals by a schedule other th
9. PERCENT OF TIME Use the keypad to enter the percentage of time desired Press ENT 38 6 5 2 6 Feed Schedule feed schedule is used to feed chemicals such as biocides time of day basis Setting up the feed schedule is a two part process The first part is to configure the relay so that it will operate by feed schedule The second part of the process is to configure the feed schedule The feed schedule is covered in section 6 5 3 From the RELAY OPTIONS screen press 5 FEED SCHEDULE The controller will respond with the following screen SCHEDULED RELAY SEE MAIN MENU FOR FEED SCHEDULE PRESS ANY KEY The relay has been configured to operate based on a feed schedule but the relay will not activate because the feed schedule has not been programmed yet 6 5 2 7 As an Alarm Relay Relays 2 3 and 4 can be configured as alarm relays The alarms that will cause the relay to activate are selectable from the controller alarms or from any node input alarms controller alarms include HIGH CONDUCTIVITY LOW CONDUCTIVITY FOULED CONDUCTIVITY SENSOR SHORTED TC OPENED TC MAX BD TIME EXCEEDED FEED SEQUENCE ACTIVE RELAY 2 TIME EXCEEDED RELAY 3 TIME EXCEEDED RELAY 4 TIME EXCEEDED and the NO FLOW alarm From the RELAY OPTIONS screen press 6 ALARM RELAY The controller will respond with the following screen WHICH ALARMS 1 CONTROLLER 2 RELAYS 5 8 3 RELAYS 9 12 4 MAKEUP COND
10. name To change the name of the process From the Main Menu press 7 SYSTEM SETUP Press 1 PROCESS PARAMETERS Press 1 CHANGE MY NAME Use the arrow keys to change the characters use the ENT key to move the cursor to the next character 47 6 5 7 1 2 5 anti steam flash menu item is used to dampen out fluctuations in conductivity due to the occurrence of steam flash To set up anti steam flash From the Main Menu press 7 SYSTEM SETUP Press 1 PROCESS PARAMETERS Press 1 ANTI STEAM FLASH Use the keypad to change the anti steam flash time The larger the time the greater amount of anti steam flash Press ENT to accept 6 5 7 1 3 PREAMP SETUP The preamp setup menu is used to set up the preamplifier for the conductivity sensor that is used The three fields are voltage gain sample resistor and the drive frequency For the 2 electrode boiler sensor the settings are Voltage gain 10 Sample R 20 Drive freq 500 Hz For the 4 electrode boiler sensor the settings are Voltage gain 10 Sample R 200 Drive freq 500 Hz Use the arrows to change the setting and hit ENT after each entry 6 5 7 1 4 TEMP COMPENSATION The model 2250e has the ability to use temperature compensated conductivity sensors The 2 electrode boiler sensor is not temperature compensated The 4 electrode is temperature compensated up
11. ppc c o 35 6 5 2 2 1 SOMOOIM eiie etd 36 6322 2 Deadbdti us inch ibn ooh Pene rdiet 36 6 5 2 2 3 Overfeed oci edes 36 6 5 2 2 4 When to 37 6 5 2 3 By Water 37 6 5 2 4 By Percent of Blowdown 37 6 5 2 5 By Percent of 38 6 5 2 6 By Feed Schedule ice boxed unen 39 6 5 2 7 As 39 6 5 2 8 Change My 40 6 5 3 Setting up the Feed 41 GSA Ala Rit hati ded titer La pre tas 43 6 5 5 Water aaah 44 6 5 A 20 MA OUIDUIS oi to E xc Ee i eL SO SEL 45 6 5 6 1 Setup of the 4 20 MA 45 6 5 6 1 1 Set the 4 20 mA 46 6 5 6 1 2 tide odisse dese 46 6 5 6 1 3 Which Process 46 6 5 6 1 4 Manual Gontrol eot inim ia 47 6 5 6 1 5 Change My 47 6 5 7 The System Setup 47 6 5 7 1 Process 47 6 5 7 1 1 Change My
12. DO NOT SCALE APvD DAI SCALE NONE FILE TYPE 1 OF 1 P N 61676 REV A PG 1 2 NOTES UNLESS OTHERWISE SPECIFIED 2450 CANNOT USED WITH CONTACTING HEAD METER 2450 METER 1 IS PERMEATE METER 2 IS CONCENTRATE CUSTOMER SUPPLIED 10K RESISTOR PULL UP ONLY OPEN COLLECTOR OUTPUT WATER METERS MAY USED CONTACTING HEAD TYPE WATER METER M M JL LL eooooolo coe Be Ond I DAD WATER METER AMTOTROL RESISTOR Lakewood G INSTRUMENTS FIND DIAGRAM L2 20 WATER NETER INPUTS 2000 SERES 2535 2540 PADDLE WHEEL Tyr DET NET TT EMI UI REVIBION REVISION HISTORY od IL RELEASE L WIRED LAREWD P E WIRED OTHERS RELAY EZ 3 FOR MHITDEIZEU NOTICE ON REPROOUCTIONS DRAWING THE DE Ss THE PATENTA ITCCAEES SET THE FECETE LA LOGEET HERD THE TT ZTT EY VALL OT TIEFE ODE T EXHIBITED EXCEET Ez TIE LMT tener THE PEPATI PE RETIN RTT C RSTRT TE TS TET eee INSTRUME WIRTHG DIAGRAM cM SERIES ENCLOSURE nia 1268647 SHEET VERSION NTS 1568547 10 1 a 5 4 E B 1 WIRING EY E WIRING BY OTHERS RECEPTACLE USED WIRE
13. OUTPUTS 4 20 MA OUTPUT Press 1 For channel 4 20 mA OUT SETUP Press 2 For channel 4 20 mA OUT SETUP 45 The 4 20 mA Out Setup screen allows user to set the 4 20 mA range calibrate the 4 20 mA output select which process the 4 20 mA channel will respond to take manual control of the 4 20 mA output and change the name of the output Below is the 4 20 mA Setup screen 4 20 MA OUTPUT 1 SET 4 20 MA RANGE 2 CALIBRATE 4 20 mA 3 WHICH PROCESS 4 MANUAL CONTROL 5 CHANGE MY NAME 6 5 6 1 1 Set the 4 20 mA Range The 4 20 mA output range must be set for the output to be useful From 4 20 mA Setup screen press 1 Set the 4 20 mA RANGE Use the keypad to enter a conductivity value for the 4 mA point Press ENT Use the keypad to enter a conductivity value for the 20 mA point Press 6 5 6 1 2 Calibrate The 4 20 mA needs to be calibrated to the actual output to be accurate A milliamp meter is necessary to calibrate the 4 20 mA output Connect the milliamp meter in line with one leg of the 4 20 mA output Refer to the drawing in the back of this manual for wiring instructions From the 4 20 mA Setup screen press 2 CALIBRATE e Use the keypad to enter the milliamp reading from the milliamp meter for the 4 mA point Press e Use the keypad to enter the milliamp reading from the milliamp meter for the 20 mA point Press ENT 6 5 6 1 3 Which Process
14. SERV CEE ig NM DIAGRAM 2405 4 TO 20 m teen Im 1 EN EZ R NOTES UNLESS OTHERWISE SPECIFIED 1 NIN GPTION PROVIDES 24 VOC TO ALL NODES IF USING MORE TH4N 3 NODES EXTERNAL 24 VDC POWER SUPPLY IN PARALLEL IS RECOMMENDED ah RMON TR INSTALLATION OPTION For more information call toll free USA 800 228 0839 Manufactured in the USA Lakewood Instruments 7838 North Faulkner Road Milwaukee WI 53224 USA Phone 800 228 0839 Fax 414 355 3508 http www lakewoodinstruments com
15. for proper operation Refer to the drawing in the back of this manual for wiring instructions NOTE DO NOT RUN THE SENSOR WIRING IN THE SAME CONDUIT AS THE MOTORIZED VALVE WIRING 19 WARNING DO CONNECT CHEMICAL PUMPS THAT ARE LARGER THAN 1 6 HORSEPOWER THE CONTROL RELAYS ARE INTENDED FOR ELECTRONIC OR SMALL MOTOR DRIVEN CHEMICAL PUMPS LARGER PUMPS REQUIRE THE HR OPTION WITH 25 AMP RATED INTERPOSING RELAYS CONTACT LAKEWOOD INSTRUMENTS FOR SPECIAL INSTRUCTIONS 3 4 3 Flow Switch Wiring The model 2250e has a flow switch input The purpose of the flow switch input is to disable the relay outputs when activation is not desired The flow switch input requires a dry digital contact Any dry digital contact rated for 24 VDC and 500 mA may be used such as a manual switch or an auxiliary contact from the boiler control system flow switch is not used then a jumper must be installed across the flow switch connections Refer to the drawings in the back of this manual for wiring instructions 3 4 4 Water Meters The Model 2250e will accept two water meter inputs These inputs can be configured for make up make up Second Source or blow down Refer to the water meter manufacturer s manual for plumbing information The 2250e series controllers will work directly with the following types of meters dry contacting head meters Seametrics open collector output meters Signet 2535 2536 and 2540 paddle wheel meters and
16. the Autotrol 1 inch and 2 inch meters Contact Lakewood Instruments for other types of water meters The water meters are wired to terminal block P1 which is the top terminal block on the I O board Refer to the drawing in the back of this manual for wiring instructions 3 4 5 4 20 mA Output Wiring If the 35L option is ordered the model 2250e has two channels of 4 20 mA output This output can be isolated externally powered or non isolated internally powered The 4 20 mA outputs are wired directly to the 35L option card Refer to the drawing in the back of this manual for wiring instructions 20 3 4 6 Sensor Wiring The model 2250e can be used with the 2 electrode boiler sensor for hot gt 200 F samples or with the 4 electrode boiler sensor for cooled lt 200 F samples The 2 electode boiler sensor uses four wires between the sensor and the controller Two wires are connected to each electrode The sensor wires are connected to terminal block P8 terminals 3 4 5 and 6 Refer to the drawing in the back of this manual for specific wiring instructions The 4 electrode boiler sensor uses six wires between the sensor and the controller One wire is connected to each electrode and two wires are used for the temperature compensation The sensor electrode wires are connected to terminal block P8 terminals 3 4 5 and 6 The temperature compensation wires are connected to terminal P7 terminals 2 and 3 Refer to the drawing
17. to the OVERFEED TIME alarm screen 6 5 2 2 3 OVERFEED TIME The OVERFEED TIME alarm is designed to notify the operator of a problem in the chemical feed system such as a pump has lost its prime or there is no chemical in the drum It will also protect the system from overfeeding chemical when the indicated Conductivity does not display a change in actual Conductivity The OVERFEED timeout function will display a visual alarm on the display and it will turn off the relay If a relay is configured as an alarm relay the OVERFEED TIME alarm will energize the alarm relay To disable this function set the OVERFEED time to 0 00 Use the keypad numbers to enter the time hours and minutes before this alarm will appear and press ENT Maximum setting is 17 hours and 59 minutes 36 6 5 2 2 4 WHEN ACTIVATE After configuring the SETPOINT the DEADBAND and the OVERFEED alarm the controller will automatically move to the WHEN TO ACTIVATE screen To set up to feed on a rising conductivity value set the relay to activate above the setpoint To set up to feed on a falling conductivity value set the relay to activate below the setpoint WHEN TO ACTIVATE 1 SETPOINT 2 BELOW SETPOINT e Select 1 ABOVE SETPOINT to turn on the relay when the conductivity rises above the conductivity setpoint or select 2 BELOW SETPOINT to turn on the relay when the conductivity falls below the conductivity setpoint
18. 0 240 5500 3900 35 19 0 450 270 6000 4300 40 22 0 500 300 6500 4700 45 24 5 550 335 7000 5000 50 27 5 600 370 7500 5400 60 33 0 650 400 8000 5800 70 39 0 700 435 8500 6200 80 45 0 750 470 9000 6600 90 51 0 800 500 9500 7000 100 56 0 850 530 10 000 7400 28 6 4 Main Menu The MAIN MENU of the 2250 looks like this MAIN MENU 1 PROCESS 2 RELAYS 3 FEED SCHEDULE 4 ALARMS 5 WATER METERS 6 4 20 MA OUTPUTS 7 SYSTEM SETUP 8 CLOCK The MAIN MENU can be accessed from the PROCESS screen by pressing CLR If CLR is pressed and the MAIN MENU does not appear the controller is probably in the VIEW ONLY or OPERATOR security mode If the controller is in the VIEW ONLY or OPERATOR security mode enter the TECHNICIAN security password to be able to access the MAIN MENU To move about in the menu screen use the and keys to highlight the desired option and press ENT or simply press the number key for the desired option Use the ENT key to accept a setting or to enter a screen Use the key to reject a setting or to exit a screen From anywhere in the menu pressing CLR will take you one step closer to the MAIN MENU Certain menu items are only visible if certain conditions apply such as nodes are installed or other parameters are configured If a menu item does not appear in the menu it most likely means that the option is not installed or configured Each of the MAIN MENU options are disc
19. 3 2 Sample Cycle plumbing Installation with SR4 sensor 16 3 3 3 Continuous Sample plumbing Installation with SR2 sensor 16 3 3 4 Continuous Sample plumbing Installation with SR4 sensor 17 3 3 5 Plumbing Installation for Sample Cycle and Continuous Sample 17 3 3 6 Blowdown Valve Sizing e ox nea epar 18 3 4 Electrical 19 3 4 1 Incoming power 115 230 19 3 4 2 Relay Outputs ep 19 2 42 Flow SWIM WINING es coi icti t rae onde cans e tue LEES 20 3 4 4 Water Meter 20 3 4 5 4 20 mA Output 20 3446 Sensor WINING iiid eti oar T a 21 3 4 7 Node Wiring oerte oe ede ette tec een eta dn e oce 21 4 0 Functional o ooi cdd UD E o LIA MEUM EUM D elas el ULM tad 22 dada ets 22 T2 OV OA Aia d va iS 22 EE V ET AN E LE DEDE UE DEL UD 22 T4 Securty Levels onore asc POPSET 23 5 0 Staring Up ihe Controler snenie id e Ee inedia n ai inedia edd xiii 23 6 0 Operation of Controle tise a hind ie traen Oa aie ei a ten dai e bare duplo 24 Gel PIOCOSS Scree I oso oce eio axe tule po e a ed cades Sade cu udin 24 6 2 Manual Operation of the
20. ARM 4 FIRMWARE VERSION 5 SECURITY 100 us 6 DIAGNOSTICS 1320500 7 COMMUNICATIONS PRO CHANGE CLR EXIT 8 NODE ISNTALLATION ENT RELAYS PRO CALIB PRO 4 ENT ACCEPT 22 4 4 Security Levels The model 2250e has a security levels to prevent tampering of the controller The Model 2250e offers three 3 security levels 1 View Only 2 Operator and 3 Technician When the controller is in the View Only or Operator security level the menu is locked out In View Only access is limited to manual operation of the relays and viewing all of the process screens In the Operator mode the user can operate the relays manually view the process screens and calibrate the controller He cannot change any other settings In the Technician mode the operator has full access to all of the menus A password is required to change from a tight security level to a less restrictive security level Each level has its own factory preset password 2222 for Technician 1111 for Operator If the controller is in the View Only or Operator mode just press the appropriate password on the keypad to change to a less restrictive security mode The passwords can be changed to personalized passwords from the Technician Level Menu NOTE IF YOU USE PERSONALIZED PASSWORDS MAKE SURE THEY RECORDED IN A SAFE AND SECURE PLACE 5 0 Starting Up the Controller Once the Installation is complete it is time to start up the controller Initi
21. ER MODEM e Select your modem from the list If your modem is not listed and you select OTHER MODEM use the keypad to enter the initialization string for your modem the modem fails to initialize check the 25 pin connector the phone cable the modem and the RS2L option card 6 5 7 7 3 Remote Password Remote communications to the Lakewood Instruments 2000 series controllers is protected with an 8 digit password The remote password is required to make changes to the model 2250e controller using the communications option card The remote password screen in the communications menu is used to change the remote password The remote password can only be changed at the controller To change the remote password e From the communications menu press 3 REMOTE PASSWORD e Use the keypad to enter the old password Enter the new password Repeat the new password again for verification NOTE The default password is 12345678 Set the remote password in the LRWS program to match the new password for this controller 6 5 7 8 Node Installation The node installation menu is used to install new nodes and to de install installed nodes Please refer to your node manual for information on node installation 52 6 5 8 Setting Clock The clock uses the 24 hour or military time 06 00 00 is 6 a m 18 00 00 is 6 p m To set the clock From the Main Menu press 8 CLOCK The following screen will appear
22. IF YOU CALL FOR TROUBLESHOOTING HELP PLEASE HAVE THE MODEL NUMBER SERIAL NUMBER AND ANY OPTIONS PERTAINING TO YOUR UNIT AVAILABLE FOR REFERENCE Mail and returns should be sent to Lakewood Instruments 7838 North Faulkner Road Milwaukee WI 53224 USA When any merchandise is to be returned to the factory please call and obtain a Return Goods Authorization RGA number and have the following information available Customer s name address telephone and fax numbers shipping and billing hard copy purchase order number for cases where repairs or parts are required that are not under warranty contact person s name and telephone number to call if the equipment is beyond repair or to discuss any other warranty matter Equipment model and serial numbers Reason for return e g repair warranty incorrect part etc We will then fax to your attention an RGA form that must accompany the returned item NOTE THE RGA NUMBER MUST BE CLEARLY WRITTEN ON THE OUTSIDE ANY ITEMS SENT BACK TO THE FACTORY WITHOUT AN RGA NUMBER WILL BE REFUSED AND RETURNED TO SENDER 58 Parts List and Service Guide When calling Lakewood Instruments please have your controllers complete model number and serial number available together with the firmware version so that the Technician can better assist you Refer to the Ordering Information section of this manual for part numbered replacement parts Write your controllers compl
23. If in the future any parts or repairs are required we strongly recommend that only original replacement parts be used Our Customer Service Department is happy to assist you with your parts or service requests Lakewood Instruments Customer Service and Technical Support Departments can be reached by calling 800 228 0839 or faxing 414 355 3508 Monday through Friday 7 30 a m 5 00 p m CST Our E mail address is csd lakewoodinstruments com should be sent to Lakewood Instruments 7838 North Faulkner Road Milwaukee WI 53224 USA MODEL 2250e Table of Contents 8 2 0 Features Benefits and SpecifIGatioris secas axe m LER E LUI LEVER ines 9 Features morenie Iii ER hershey PARE ERA Ee keeles 10 2 2 Benefits 10 2 3 Sp cifications siini g TERRITI 11 2 4 Ordering 12 3 0 Unpacking Mounting and 13 9 1 WUD ACN vete desinet 13 342 Mounting the 13 3 3 tc 14 3 3 1 Sample Cycle plumbing Installation with SR2 sensor 15 3
24. K AAD OTICE REPRODGOCTIO DARPAN IMP BORDEN RO POP RROD G THAT THEY LL ROT DE REP COAT LOWED CM nN TE NOR USED ENEPTIN NE LISTE Wir AD TE PRIVATE LSE PERMUTED DY INSTRUMENTS BETTIE DOR AIT MT CLEMLIT C DOT CALTT INSTALLATION LAYOUT OF CONTINOUS OR SAMPLE CYCLE 20008 m Er jp 1200047 wre 1268647 PA Lens NOTES A JUMPER 3 5 AND 4 6 WITH 22 AWG WIRE ON P8 BOILER SENSOR JUMPER 22 AWG REVISION HISTORY DESCRIPTION e omes _ re Ee 722 c oooooc oooooc0 000000 NOTICE REPRODUCTIONS THIS DRAWING THE DESIGN AND THE PATENTS IT COVERS ARE THE PROPERTY OF OSMONICS INC THEY ARE LOANED MERELY AND ON THE BORROWER S EXPRESS AGREEMENT THAT THEY WILL NOT BE REPRODUCED COPIED LOANED EXHIBITED a ewoo NOR USED EXCEPT IN THE LIMITED WAY AND THE PRIVATE USE PERMITTED BY WRITTEN CONSENT GIVEN BY THE LENDER THE BORROWER RIAL TOLERANCES UNLESS NOTED INSTRUMENTS NISA 03 WIRING DIAGRAM 21 16 010 25 SENSOR WIRE LOW POWER M2250 SUSTOWER Ew pe e Pm 1227210 4c CUSTOMER LOC APVD DDR DATE 4 95 THIRD ANGLE
25. LAKEWOOD INSTRUMENTS MODEL 2250e MICROPROCESSOR BASED BOILER CONDUCTIVITY CONTROLLER INSTALLATION amp OPERATION MANUAL SERIAL ff Lakewood Instruments 7838 North Faulkner Road Milwaukee Wisconsin 53224 USA Phone 800 228 0839 Fax 414 355 3508 http www lakewoodinstruments com Lakewood Instruments Model 2250e Controller Quick Installation Sheet Attach the four 4 supplied mounting feet to the back of the controller enclosure either vertically or horizontally Install the controller on a flat non vibrating surface Do not mount the controller to a steel object that has a large temperature change side of cooling tower etc This can cause water to condense inside the enclosure Install water meters chemical pumps plumbing assemblies and the conductivity sensor see drawing on back for Boilers Install the provided strain reliefs with nuts if necessary by removing the attached black plugs and inserting strain relief through hole Wire the conductivity sensor water meters and 4 20 mA output if applicable see drawing on back Ensure wiring connections are correct or damage may occur Wire pumps and or valves directly to the terminals If using a motorized ball valve wire as per wiring instructions Refer to the instruction manual for more details Apply power to the model 2250e controller press CLR twice press 7 System setup press 2 Initialization press 2 Whole c
26. MON 11 FEB 02 11 23 13 PRO CHANGE CLR EXIT Press PRO to change the clock settings Use the up and down arrow keys to change the day of the week Press ENT Use the number keys to change the date Press ENT Use the arrow keys to change the month Press ENT Use the number keys to change the year Press ENT Use the number keys to change the hour Press ENT Use the number keys to change the minutes Press ENT Use the number keys to change the seconds Press ENT Press CLR to exit this screen You must press ENT all the way through this menu for the settings to take affect 53 6 5 9 Changing the Security Levels The security level can be change to prevent any unwanted tampering of the controller To change the security level from Technician to Operator or View Only From the Main Menu press 0 Note that 0 does not appear on the menu screen CHANGE LEVEL TO OPERATOR WARNING YOU SHOULD KNOW THE PASSWORD Select YES to change the security level to a more restrictive level The controller menu now functions at the new security level To return to the Technician security level e Press the numeric password from the Process screen TECHNICIAN PRESS ANY KEY Remember that following the first power up the Technician password is 2222 and the Operator password is 1111 You may change the passwords in the SYSTEM SETUP menu 54 7 0 Maintenance Pe
27. NIN 9 12 82430 5 8 5 8 2430 COND channels 1 and 2 pH on DIG can be ORP used for extra COND water meter inputs pH ORP 2 0 Features Benefits Specifications T Lakewood INSTRUMENTS SERIES 2000 eee ZI POWER ON OFF SWITCH LOCKABLE LOCK SCREWS The lock screws keeps your circuit boards secure and provides easy access for wiring 16 BUTTON KEYPAD ENT for Menu selection and or acceptance of selected values CLR to exit a Menu LATCH ENCLOSURE A sturdy NEMA 4X rated enclosure protects your controller Make sure it is properly mounted SEE and setup Simply turn selection and or INSTALLATION the lock screw and pull skip input options Mounting The power open the front panel DSP to change cord and receptacles can languages be removed so that the PRO to program a Menu controller can be hardwired selection through conduit knockouts Figure 1 Model 2250e 2 1 FEATURES Sample cycle or continuous conductivity control of blowdown Steam flashing detector and compensation Two 2 water meter inputs Records both makeup MTR1 and Blowdown MTR2 water meter total gallons Configure Blowdown water meter MTR2 as second makeup meter One relay configured for blow down and three user configurable relays for conductivity control and chemical addition These relays can be configured in multiple ways including scheduled feed for biocid
28. POINT the DEADBAND and BLOWDOWN TIMEOUT alarm the controller will automatically move to the WHEN TO ACTIVATE screen To set up to blow down on a rising conductivity value set the relay to activate above the setpoint set up to blow down on a falling conductivity value set the relay to activate below the setpoint WHEN TO ACTIVATE 1 ABOVE SETPOINT 2 BELOW SETPOINT Select 1 ABOVE SETPOINT to turn on the relay when the conductivity rises above the conductivity setpoint or select 2 BELOW SETPOINT to turn on the relay when the conductivity falls below the conductivity setpoint The asterisk indicates the current configuration 6 5 1 2 BOILER OPTIONS The Boiler Options screen is used to set up the controller for Sample Cycle or Continuous sample control of conductivity When Boiler Options is selected the following screen will appear TIMES IN HOURS MINS SAMPLE TIME 0 00 CYCLE TIME 00 00 FOR CONTINUOUS CONTROL SET BOTH TIMES TO ZERO 32 6 5 1 2 1 SETTING UP FOR SAMPLE CYCLE CONTROL In sample cycle control the controller only reads conductivity while it is blowing down in the Sample mode The controller will open the blowdown valve for a specified amount of time Sample Time to periodically blow down the boiler once the sample time expires the controller compares the conductivity reading to the Setpoint If the reading is greater than the setpoint the controller will keep the blo
29. SR4 sensor should be mounted down stream of a sample cooler The temperature compensation is limited to about 200 F Note For proper operation the sample cooler should have adequate flow to ensure a constant output temperature of lt 200 F Description of sample cycle plumbing installation The sample line should come out of the surface blowdown line and go to the sample cooler and then the boiler sensor The sensor should be mounted horizontally Down stream of the sensor on a horizontal pipe should be mounted the blowdown valve and then the flow restriction device orifice union and plate or globe valve The flow restriction device should be mounted within 5 feet of the sensor Down stream of the flow restriction device is the blowdown receiver or drain 3 3 3 Continuous Sample plumbing Installation with SR2 boiler sensor To use the model 2250e boiler controller in the continuous sample mode the plumbing installation must be done in accordance with the suggested installation drawing in the back of this manual It is very important to complete the plumbing installation exactly as it is shown in the drawing because improper installation can cause steam flash to occur which will cause erratic conductivity readings It is recommended that the Lakewood Instruments model PL6 or PL675 plumbing assembly be used Description of continuous sample plumbing installation The sample line should come out of the surface blowdown line and drop s
30. The flow restriction device should be mounted within 5 feet of the sensor Down stream of the flow restriction device is the blowdown receiver or drain A second line should tap off of the sample line either before or after the sensor but before the flow restriction device in the sample line This second line is used for the automatic blowdown valve The line with the blowdown valve must have a flow restriction device 3 3 5 Plumbing Installation for Sample Cycle and Continuous Sample Sometimes it is necessary to switch the controller from sample cycle to continuous sample mode or vice versa due to steaming loads This method of plumbing allows the operator to change modes of operation by changing the position of just one valve and setting up the controller for the appropriate mode of operation The description below is for use with the SR2 boiler sensor but it can be modified for use with the SR4 boiler sensor Description of plumbing The sample line should come out of the surface blowdown line and drop straight down to at least 2 to 3 feet below the water level of the boiler At the bottom of that line the sensor should be mounted horizontally Down stream of the sensor on a horizontal pipe should be mounted an isolation valve and a flow restriction device orifice union and plate or globe valve The flow restriction device should be mounted within 5 feet of the sensor Down stream of the flow restriction device is the blowdown receiver o
31. act is closed That should change to zero VDC when the contact opens Check these voltages and for correct wiring Is the controller configured for your type of water meter Alarm Flashing FEED SEQUENCE ACTIVE Display is blank This simply indicates that a feed schedule relay is active There may be a problem with the incoming power the fuse or the circuit board Open the front panel to troubleshoot 56 No action necessary Check the fuse Replace if blown Does the unit have power Verify with volt meter If there is power to terminals LINE and NEUTRAL on TA call Lakewood Instruments Technical Service for more information PROBLEM Alarm Flashing RLY TIME EXCEEDED NO FLOW alarm WHAT THIS MEANS This indicates that the controller has been trying to feed chemical for longer than the user programmed time and is unable to reach the setpoint Flow input switch is not closed CORRECTIVE ACTION Check for proper operation of pump or valve Use the manual relay control to help Check that the chemical drum is not empty Check for power to the chemical pump Verify the relay timeout time is properly set for your application see RELAYS in MAIN menu To reset this alarm momentarily turn off flow to the controller to get the no flow alarm If the flow switch input is not used insert a jumper wire across terminals 4 and 5 of terminal block P1 The device used
32. an one that is seven days long BY CYCLE CALENDAR can be used to feed the same chemical every day or up to 28 days between feedings The operator specifies the number of days in the cycle calendar After the cycle calendar is completed the schedule starts over again This method of feeding is particularly useful when feeding two biocides on alternating weekly basis To configure the feed schedule to feed by cycle calendar From the FEED SCHEDULE screen press 2 BY CYCLE CALENDAR Use the keypad to enter the number of days in your cycle then press ENT Remember the maximum number of days allowed is 28 e Use the keypad to enter which day today is in your cycle e g today is day number 5 in my 14 day cycle then press ENT After selecting whether the feed schedule will be fed by WEEKDAY or by CYCLE CALENDAR it is time to actually program the schedule To enter the actual feed schedule or to edit the feed schedule from the feed schedule screen above Press 3 LIST SCHEDULE This will take you to a list of all scheduled feeds as shown in the screen on the next page NOTE The maximum number of scheduled feeds is 16 sixteen total 41 FEED SCHEDULE 03 00 RLY2 00 00 00 00 00 00 00 00 00 00 e If there are no scheduled feeds select the first schedule and press ENT If you are editing the schedule select the schedule that you want to edit and press ENT Below is an example screen for programming a ch
33. anger of altering them PRO CALIB ENT RELAYS Access these screens by using the and keys to scroll through the available screens e Press ENT to manually enable a relay for testing or troubleshooting purposes Press PRO to calibrate the conductivity Press CLR to access the main menu 2 ALL RELAY SCREEN 5 RELAY 1 2 3 4 SETTINGS BLOW RELAY IN SAMPLE MODE 1000 us 1000 15 1000 us COND LOW ALARM COND LOW ALARM BLOW RLY2 RLY3 RLY4 0 3 4 BLOW SAMPLE MODE Du 00 00 45 PRO CALIB ENT RELAYS PRO CALIB ENT RELAYS PRO CALIB ENT RELAYS 3 BLOW SETPOINT SCREEN 6 1 TOTAL FLOW BLOW RELAY IN CYCLE MODE COND HIGH ALARM BLOW CYCLE MODE COND HIGH ALARM MTR1 TOTAL FLOW OPENED TC BLOW COND SETPOINT 1000 pS PRO CALIB ENT RELAYS 0 PRO CALIB ENT RELAYS 00 05 35 PRO CALIB ENT RELAYS 4 RELAY 2 SETTINGS 7 MTR2 TOTAL FLOW 1 000 S If nodes are installed there will be additional screens for the SHORTED TC additional inputs or outputs MTR2 TOTAL FLOW Please see your specific node 0 manual for more information RLY1 TIMEOUT RLY2 BY MTR2 METER FEED AFTER GALS LTRS 0 FOR 00 00 55 PRO CALIB ENT RELAYS PRO CALIB ENT RELAYS 24 6 2 Manual Operation of the Relays All four of the relays can be operated manually To manually operate the relays Go to the Process screen Press ENT You will be tak
34. as the flow switch input may be bad Check the operation with an OHM meter If no flow switch is used a jumper wire should be installed across the flow switch input Removing the jumper disables all relay outputs Bleed valve relay is closed above setpoint Bleed valve relay is open below setpoint SENSOR READS ZERO ALARM FLASHING COND Fouled SENSOR Controller may be in feed schedule High conductivity alarm will force the bleed valve to open Controller may be doing a pre bleed before feeding biocide The controller may be in the sample mode if using sample cycle control You are trying to perform a span calibration of the conductivity and the conductivity sensor reads zero Conductivity sensor is not reading properly 57 Check feed schedule Check High conductivity alarm setpoint Change setpoint if necessary Check feed schedule Adjust as necessary No action is necessary if sample time is correct Check wiring Ensure sensor is full immersed in water The model 2250e will not accept a span calibration below about 200 uS Cycle conductivity higher and re calibrate Clean sensor Check wiring Verify that all connectors are fully mated Replace conductivity sensor 9 0 Factory Service Technical Support for Lakewood Instruments can be reached by calling 800 228 0839 or faxing 414 355 3508 Monday through Friday 7 30 a m 5 00 p m CST NOTE
35. ate sample flow to the controller by opening the sample line isolation valves Check for leakage Power up the controller by turning on the circuit breaker It is best to initialize the whole controller to remove any settings that may be in the memory before programming the controller Refer to section 6 5 7 2 of this manual to initialize the controller If applicable install each node in software Set the clock by following section 6 5 8 Set the high and low conductivity alarms by following section 6 5 4 Configure the relays for operation by following section 6 5 Calibrate the conductivity by following section 6 3 Verify operation of the controller before leaving the area 23 6 0 Operation of the Controller 6 1 Process Screen The screen that is used the most in the 2250e controller is the Process Screen Below are the process screen views The process screen has three sections The top section shows the Conductivity reading The alarm bar is the middle section and appears between the top and bottom sections It is solid in appearance and flashes showing the current active alarms in sequence if there are multiple alarms The bottom section has user selectable readings as shown below 1 DATE SCREEN e There are many different screens available in the ALARM BAR PROCESS screen These screens allow you to view 3 MAR 98 the unit s settings incl time setting relay set ups 11 55 04 total flow etc without the d
36. be adjusted to the specifics of the application If the steaming load or the make up water quality changes the cycle time may need to be adjusted If the conductivity is always too low the cycle time should be set to a longer period of time If the conductivity is always too high the cycle time should be set to a shorter period of time To set the controller for Sample Cycle control in the Boiler Options screen e Use the number keys to input a sample time The minimum amount of time is one minute Press ENT e Use the number keys to input a cycle time The minimum amount of time is one minute Press ENT 33 When controller is set up for sample cycle control the process screen will show one of the three screens shown below when the blow relay is selected The screen will count down the amount of sample time or cycle time and will display the conductivity setpoint after the sample time has expired and the conductivity is still above the conductivity setpoint BLOW RELAY IN SAMPLE MODE BLOW RELAY IN CYCLE MODE BLOW SETPOINT SCREEN COND HIGH ALARM COND HIGH ALARM OPENED TC BLOW SAMPLE MODE BLOW CYCLE MODE BLOW COND SETPOINT 00 00 45 00 05 35 1000 S PRO CALIB ENT RELAYS PRO CALIB ENT RELAYS PRO CALIB ENT RELAYS 6 5 1 2 2 SETTING UP FOR CONTINUOUS SAMPLE CONTROL In continuous sample control there is continuous blowdown occurring The controller will activate the blowdown valve based on setp
37. d if you want to reset the total count for that meter to zero Press 1 for YES or press 2 for NO 44 If DATA INDUSTRIAL was selected You will be taken to the SLOPE VALUE screen Use the keypad to enter the factor and offset values for your particular water meter then press ENT You will then be asked if you want to reset the total count for that meter to zero Press 1 for YES or 5 2 for NO If SIGNET was selected You will be taken to the K FACTOR screen Use the keypad to enter the K factor for your particular water meter then press ENT You will then be asked if you want to reset the total count for that meter to zero Press 1 for YES or press 2 for NO If AUTOTROL TURB 1 IN was selected e The controller will confirm that the AUTOTROL TURB 1 IN has been selected and you will be asked if you want to reset the total count for that meter to zero Press 1 for YES or press 2 for NO If the AUTOTROL TURB 2 IN is selected e The controller will confirm that the AUTOTROL TURB 2 IN has been selected and you will be asked if you want to reset the total count for that meter to zero Press 1 for YES or press 2 for NO 6 5 6 4 20 mA OUTPUTS If the 35L option is ordered the model 2250e has two channels of 4 20 mA output The 35L is an option card that can be added in the field 6 5 6 1 Set Up of the 4 20 mA Output To set up the 4 20 mA output From the Main Menu press 6 4 20 mA
38. ductivity in a boiler sample cycle and continuous sample In the continuous sample method boiler water is continuously being blown down past the boiler sensor In the sample cycle method boiler water is periodically blown down past the sensor based on time It is critically important that the blowdown piping is plumbed appropriately for the type of control method that you will use If the piping is not plumbed correctly the controller will not be able to control conductivity The boiler blowdown rate requirement is used to determine the method of control continuous sample or sample cycle you should use If your boiler requires greater than 1000 pounds per hour of blowdown to maintain conductivity then the continuous sample method should be used If your blowdown requirement is less than 1000 pounds per hour the sample cycle method is appropriate If your blowdown rate requirement changes above and below 1000 pounds per hour based on steam load then you may have to switch between sample cycle control and continuous sample control The model 2250e can be used for either sample cycle control or continuous sample control of the conductivity in the boiler The blowdown piping is the limiting factor The installation drawings in the back of this manual show how to plumb the boiler sample line for sample cycle continuous sample and a method that covers both methods of control For each method of blowdown control the controller can use either the
39. e addition Blowdown Relay options Bleed x gallons for every x gallons makeup Bleed x minutes for every x gallons of makeup Bleed by setpoint User selectable relay options Feed by setpoint direct or reverse Water meter actuated feed MTR1 MTR2 or the sum of the two Percent of blowdown time Percent of Time feed Feed Schedule timer General alarm e Three security levels View only operator technician e 4 20 mA output available as an option e Remote communications available as an option e 16 key numeric keypad and illuminated graphical display allow for quick and easy programming e The Model 2250e controller stores all setpoints calibration values and relay configurations in an EEPROM An EEPROM does not require a battery to retain information so if power is lost these values will be retained for years The 2250e includes a battery backup device to retain information such as water meter totals and clock and calendar information Battery life is approximately 3 months if no power is applied to the controller 2 2 BENEFITS e Multiple control options in a single economical package e Very accurate control of chemical feed and boiler conductivity e Control results in fuel savings by preventing excessive blowdown e Prevents carryover due to excessive conductivity e Very low maintenance e Tolerant to power surges and brownouts There is plenty of protected room inside the enclosure for electrician wiring e Two water mete
40. emical feed Before programming a chemical feed you need to configure Relay 2 3 or 4 be a feed schedule relay RELAY ARROWS CYCLE DAY START TIME COND SETPOINT BLOW DURATION FEED DURATION LOCKOUT TIME lt UP gt lt DOWNS gt ENT ACCEPT program the schedule use the keypad to enter the values in the above screen Press RELAY CYCLE DAY or DAY START TIME COND SETPOINT to move to the next item is which relay you want to program you must configure a relay to be a feed schedule relay first Use the arrow keys to select the available relays Only relays that have been configured as feed schedule relays will appear is the day you wish to actuate the feed schedule relay is the time you want to start the feed schedule sequence This start time uses the 24 hour clock or military time 06 00 00 is 6 a m 18 00 00 is 6 p m is a pre bleed setpoint This would typically be lower than the normal conductivity setpoint Because the bleed valve may be disabled during a scheduled feed a pre bleed will help prevent a build up of tower conductivity 0 uS will disable this feature 42 BLOW DURATION FEED DURATION LOCKOUT TIME 6 5 4 Alarms if the COND SETPOINT is not met within this time the blowdown will stop and the feed schedule relay will be actuated If conductivity is disabled this is the amount of time the controller will blow down during the pre bleed sequence Input
41. en to a screen that looks like AUTO MANUAL 5 MINS 1 BLOW 2 RLY2 3 RLY3 4 RLY4 Press 1 4 CLR EXIT Press 1 4 to manually change state of that particular relay If the relay is already on pressing that number will turn it off A five minute countdown timer will start After five minutes has expired the relay will return to automatic control A relay that is in manual control will stay in manual control until the five minutes expires even if this screen is exited The five minute timer helps to prevent damage to the system if a relay is left in manual WARNING Manual control overrides everything including the flow switch input Use care when operating relays manually with no flow in the system 25 6 3 Calibration of CONDUCTIVITY 6 3 1 CALIBRATION The conductivity requires periodic calibration Calibration is usually required after cleaning the sensor Calibration should always be performed with the sensor in the piping assembly with good flow past the sensor It is necessary to have an accurate reading of the blowdown water to properly calibrate the controller A hand held conductivity meter that tests the sample works well for this purpose If a meter that measures ppm is used refer to the conductivity vs ppm chart in section 6 3 3 and convert the ppm to an approximate conductivity value The model 2250e controller uses a single point calibration A two point calibration is not necessary if usin
42. ete model number serial number and firmware version here so that you will have them available if you wish to contact a Lakewood Instruments technician Model Number Serial Number Firmware Version 10 0 Drawings NOTES UNLESS OTHERWISE SPECIFIED 1 ORIFICE UNIONS MUST BE INSTALLED TO PREVENT STEANFLASH REFER TO DRAWING NUMBER 5000193 FOR PROPER ORIFICE SIZING MUST LOCATED BELOW THE SKIMMER IN THE POSITION SHOWN USE 87883 CABLE ASSEMBLY PLAGE IN GONDUIT SEPERATE FROM POWER OR VALVE WIRING 1 MINIMUM Peer E cc RECOMMENDED SKIMMER BLOWDOWN LINE BOILER MOTORIZED BALL WALVE ORIFICE UNION TO BLOWDOWN RECEIVER BLOWDOWN ASSEMBLY SAMPLE CYCLE FEET C2 DRAWING PLUMBING DIAGRAM pem MODEL 2250 SAMPLE CYCLE T_ tal NOTES UNLESS OTHERWISE SPECIFIED 1 ORIFICE UNIONS MUST BE INSTALLED TO PREVENT STEAMFLASH REFER DRAWING NUMBER 5000193 FOR PROPER ORIFICE SIZING MUST BE LOCATED BELOW THE SKIMMER IN THE POSITION SHOWN SKIMMER BLOWDOWN LINE IN BOILER BLOWDOWN ASSEMBLY CONTINUOUS El lt r ri USE 67663 CABLE ASSEMBLY PLACE IM CONDUIT SEPERATE FROM POWER OR VALVE WIRING RECEIVER ORIFICE UNION gt 3 DRAWING PLUMBING DIAGRAM E MODEL 22500 ou REVISION REVISION HISTORY DII Te a THS TEOCA
43. g a Lakewood Instruments conductivity sensor 6 3 1 1 CALIBRATION IN THE CONTINUOUS SAMPLE MODE In the continuous sample mode the boiler is continuously being blown down e Ensure that the controller is operating with good flow past the sensor e Take asample of the water and measure with a hand held conductivity tester e From the PROCESS screen press PRO to enter the calibration screen Use the keypad to input the conductivity reading from the hand held Press ENT e Take another hand held sample to verify calibration 6 3 1 2 CALIBRATION IN THE SAMPLE CYCLE MODE In the sample cycle mode the model 2250e controller takes a sample periodically based on time and setpoint e Ensure that the controller is in the SAMPLE mode by going to the manual relay control screen and energizing the BLOW relay if necessary e Ensure that there is good flow past the sensor e Take asample of the water and measure with a hand held conductivity tester e From the PROCESS screen press PRO to enter the calibration screen Use the keypad to input the conductivity reading from the hand held Press ENT e Take another hand held sample to verify calibration 26 6 3 2 CALIBRATION CHECK BUFFER SOLUTIONS This check can be performed with the 4 electrode SR4 boiler sensor only This check is not valid with the 2 electrode boiler sensor SR2 because the SR2 requires a hot sample gt 200 F to read properly To chec
44. hanical stress component degradation electromagnetic fields mishandling improper setup physical abuse chemical abuse improper installation improper power feeds and exposure While every precaution is taken to insure proper functioning extra precautions should be taken to limit the ability of over feeding by limiting chemical quantities available secondary shut downs alarms and redundancy or other available methods CAUTION POWER SOURCE AND WIRING Low voltage wiring and high voltage 110 plus should not be run in the same conduit Always run separately Even shielded low voltage is not a guarantee of isolation Every precaution should be taken to insure proper grounding and elimination of shorting or Electromagnetic field EMF interference WARNING ELECTRICAL SHOCK To reduce the risk of electrical shock this equipment has a grounding type plug that has a third grounding pin This plug will only fit into a grounding type outlet If the plug does not fit into the outlet contact a qualified electrician to install the proper outlet DO NOT change the plug in any way Lakewood Instruments We thank you for your selection and purchase of a Lakewood Instruments product With proper care and maintenance this device should give you many years of trouble free service Please take the time to read and understand this Installation and Operation Manual paying special attention to the sections on OPERATION and MAINTENANCE
45. in the back of this manual for specific wiring instructions NOTE DO NOT RUN THE SENSOR WIRING IN THE SAME CONDUIT AS THE MOTORIZED VALVE WIRING NOTE THE MAXIMUM ALLOWED WIRE DISTANCE BETWEEN THE CONTROLLER AND THE SENSOR IS 20 FT 3 4 7 Node Wiring If the option is ordered with any external nodes NpH NCON NRLY NDIG or 4201 they must be wired to the controller before installation and programming can take place Nodes require 24 VDC for operation and twisted pair wire for data transmission The NIN option card can provide the 24 VDC for up to two nodes using non twisted pair wire If using three or more nodes an external 24 VDC power supply run in parallel is recommended Recommended twisted pair for data specifications are Beldon 85102 single twisted pair stranded 9 29 unshielded plenum Beldon 8471 single twisted pair stranded 9 29 unshielded nonplenum JY ST Y 2 X2 X 8 UL Level IV 22 AWG twisted pair typically solid and unshielded Four wire helical twist solid shielded If shielded cable is used the shield should be connected to earth ground via a 470K ohm 25 watt metal film resistor to prevent static charge buildup Nodes are wired directly to the NIN card inside the controller enclosure Please refer to the diagram in the back of this manual for wiring instructions 4 0 Functional Overview 4 1 Display The model 2250e uses an illuminated 128x64 pixel LCD digital display f
46. k the calibration of the sensor in buffer solutions the sensor is placed in a container of the buffer solution Ensure that the sensor tips are centered in the container away from the edges and the bottom of the container The conductivity values displayed can vary depending on the position of the conductivity sensor in the container of buffer solution Perform the calibration check as follows Shut the isolation valves in the boiler blow down line Remove the conductivity sensor and place it in the buffer solutions Verify calibrations in at least two buffer solutions Re install the sensor into the plumbing Open the isolation valves to the blow down line 27 6 3 3 Conductivity vs ppm The model 2250e measures the conductivity of the water The ppm of the water may be measured instead of conductivity If ppm is measured use the following chart for an approximation of the conductivity level and calibrate to the conductivity level that is closest to the ppm level that is measured Remember this is just an approximation because the ions that make up the conductivity may be different than the particles that make up the ppm reading Conductivity vs PPM Table 2 1 120 68 900 560 4 2 1 140 80 950 600 6 3 2 160 91 1000 630 8 4 2 180 100 1575 970 10 5 2 200 115 1575 1300 12 6 4 220 127 2500 1700 14 7 4 240 139 3000 1575 16 8 5 260 150 3400 2400 18 9 6 280 164 4000 2750 20 11 0 300 176 4500 3150 25 13 5 350 210 5000 3500 30 16 0 40
47. losure The neutrals are wired directly to terminals 2 and 3 of terminal block TA Refer to the drawing in the back of this manual for wiring instructions 3 4 2 Relay Outputs The relay outputs are of the same voltage as the power input Ensure that the devices that are to be connected to the relay outputs are of the same voltage rating or damage will occur The relay outputs are wired to the receptacles The receptacle on the far left is relay 1 and the receptacle on the far right is relay 4 On the power supply board relay 4 is on the far left and relay 1 is on the far right Relay 1 2 3 and 4 are identified as K1 K2 K3 and K4 respectively on the power supply shield If 115 VAC is used simply plug your devices into the molded receptacles If 230 VAC is used remove the receptacles and hard wire your devices to the relay outputs Relay 1 is dedicated as the blowdown relay and should be used to control the boiler blowdown valve Relay 1 is the only relay that has the boiler timing functions for sample cycle control Relay 1 and 2 have both a normally open and normally closed contact This is designed for use with motorized valves The normally open NO contact is connected to the open connection of the valve and the normally closed NC contact is connected to the close connection of the valve The other two relays only have a normally open contact Each relay output requires a neutral connection and an earth ground connection
48. model SR2 boiler sensor for hot gt 200 F samples or the model 584 temperature compensated boiler sensor for cooled lt 200 F samples To prevent steam flashing and damage to the controller refer to the installation drawing in the back of the manual and notes below e Use piping from the boiler skimmer line as the sample and blowdown line NOTE DO NOT USE THE BOTTOM BLOWDOWN OUTLET AS THE SAMPLE OR AUTOMATIC BLOWDOWN LINE e The maximum allowed wire distance between the controller and the sensor is 20 ft NOTE DO NOT RUN THE SENSOR WIRING IN THE SAME CONDUIT AS THE MOTORIZED VALVE WIRING e f using conduit between the sensor and controller allow a place for water to escape if the sensor leaks This will help prevent water damage to the controller 14 Use orifice plates or globe valves down stream of the sensor to prevent steam flash The orifice plates or the globe valve should be mounted within 5 feet of the sensor Orifice plates or globe valve and the sensor must be installed horizontally as shown in the drawing e The sensor should be located at least two feet below the water level in the boiler e Ensure that there are no restrictions between the skimmer line and the orifice plates or globe valve and all valves upstream of the boiler sensor are fully open e Be sure to provide isolation valves in the sample line to allow for maintenance of the sensor e Refer to section 3 3 6 for the orifice sizing char
49. nal damage Note on the carrier s bill of lading the extent of the damage if any and notify the carrier Save the shipping carton until your Model 2250e controller is started up If shipping damage has occurred the Lakewood Instruments Customer Service Department at 800 228 0839 and return the controller to the factory in the original carton 3 2 Mounting the Enclosure The Model 2250e is supplied with four mounting feet The Model 2250e can be mounted to a panel or to a flat non vibrating wall e Attach the four mounting feet to the back of the controller enclosure e Install on smooth surface to prevent stress on the mounting feet e Do not install on vibrating wall e f enclosure is installed in corrosive environments consider purging e Dimensions indicated as inches millimeters e The enclosure material is PVC e Use 10 mounting screws 4 e Avoid drilling or punching additional holes in the controller enclosure Damage incurred as a result of any alteration to the enclosure is not covered under the Lakewood Instruments product warranty The dimensions of the enclosure in inches are The model 2250 has a shipping weight of about 8 Ibs NOTE EXCESSIVE HEAT AND OR DIRECT SUNLIGHT EXPOSURE WILL DARKEN THE LCD DISPLAY SCREEN MAKING IT DIFFICULT TO READ AND MAY SHORTEN THE LIFE OF OTHER ELECTRONIC COMPONENTS 13 3 3 Plumbing Installation There are two methods of automatic control of the con
50. nstruments for assistance 50 6 5 7 7 Communications The model 2250 has an option for remote communications the RS2L option If this option is installed the communications option is configured from this screen This screen is used to set up the com port initialize the modem and set the remote password To set up the communications option From the Main Menu press 7 SYSTEM SETUP Press 77 COMMUNICATIONS COMMUNICATIONS 1 COM PORT SETUP 2 INITIALIZE MODEM 3 REMOTE PASSWORD 6 5 7 7 1 Com Port Setup Com port setup is used to set up the com port for use with a modem or direct connect setup the com port press 1 COM PORT SETUP COM PORT PARAMETERS BAUD RATE 19200 DATA BITS 8 STOP BITS 1 PARITY NONE lt gt lt gt ENT ACCEPT Use the arrow keys to change the baud rate If using the direct connect method of communicating ensure that the baud rate at the controller and the baud rate in the LRWS software match The standard values for the DATA BITS is 8 STOP BITS is 1 and PARITY is NONE Normally these will not need to be changed 51 6 5 7 7 2 Initialize Modem Before a modem can be used by the controller it must be initialized The initialization screen gives four choices of modems To initialize the modem From the Communications menu press 2 INITIALIZE MODEM INITIALIZE MODEM 1 HAYES ACCURA 2 U S ROBOTICS 3 ZOOM 4 OTH
51. oint to increase the blowdown rate to maintain conductivity To set the controller for Continuous sample control in the Boiler Options screen e Use the number keys to input a sample time of 0 00 Press ENT e Use the number keys to input a cycle time of 0 00 Press ENT 6 5 1 3 CHANGE MY NAME The name of each individual relay can be changed to any 4 character name This is useful to designate the chemical name for each relay Use the arrow keys to change the character and the ENT key to move to the next character OLD NAME BLOW NEW NAME RLY1 lt UP gt lt DOWNSENT ACCEPT From the BLOWDOWN RELAY OPTIONS screen press 3 CHANGE NAME 34 6 5 2 Configuring Relays 2 3 4 Below is the RELAY OPTIONS screen The asterisk next to one of the options tells you how that relay is configured Relays 2 3 and 4 can be programmed in each of the methods shown on the RELAY OPTIONS screen 1 DISABLED 2 SETPOINT 3 WATER METER 4 PERCENT BLOWDOWN 5 PERCENT OF TIME 6 FEED SCHEDULE 7 ALARM RELAY 8 CHANGE MY NAME 6 5 2 1 Disabled Relays 2 3 and 4 can be disabled When a relay is disabled it will not energize automatically From the RELAY OPTIONS screen press 1 Disabled to disable the relay 6 5 2 2 By Setpoint Relays 2 3 and 4 can be configured to operate based on a setpoint To set up the relay to operate based on a setpoint select SETPOINT in the RELAY OPTIONS
52. ontroller press 1 Yes After initialization press the CLR key several times until you get to the main menu Press 1 Process Press ENT This screen allows manual control of the relay outputs to test the chemical pumps and valves Press CLR to return to the Process screen To calibrate the conductivity take a sample with a handheld conductivity meter press the PRO button and type in the conductivity value press ENT If the sample cycle method is used energize the blow relay if necessary See instruction manual for more details Program the model 2250e relays for conductivity control and chemical feed schemes See instruction manual for more details CEE REVISION HISTORY eco anma 2307 PRODUCTORS Sten TIT COATS INSTALLATION LAYOUT OF CONTINOUS OR SAMPLE CYCLE 20006 E E EL NOTES UNLESS OTHERWISE SPECIFIED CUSTOMER SUPPLIED 10K RESISTOR PULL UP ONLY OPEN COLLECTOR OUTPUT WATER METERS MAY BE USED CONTACTING HEAD TYPE WATER METER V TS GE 000202 TC SOL N GROUND REFERENCE AUFUN AUTOTROL TURBINE SHD GND SIGNET 2535 2540 PADDLE WHEEL FIGURE A IMPORTANT NOTICE WARNING CHEMICAL FEED All electromechanical devices are subject to failure from a variety of causes These include mec
53. or ease of viewing It has multiple lines to display information such as the conductivity reading alarms relay status relay configuration clock flow totals for both water meters and menu selections 4 2 Keypad The model 2250e uses a 16 key numeric keypad for ease of programming The keys have the following functions ENT To accept a setting or to enter a screen CLR To exit a screen or to access the main menu PRO To calibrate the controller DSP To change languages UP arrow To move about in the menu DOWN arrow To move about in a menu Number keys To input a value or to select a menu item 4 3 Menu The model 2250e is programmed and calibrated by the use of a menu The complete Main Menu has 8 available options that can be accessed in the Technician Level However a list of only six options can be viewed at one time Use the and keys to scroll through the options As an introduction here is a graphic overview of the first level of each option in the Main Menu to see how it operates Complete details of each option are provided later in this manual MAIN MENU PROCESS RELAYS FEED SCHEDULE ALARMS WATER METERS 4 20 OUTPUFS SYSTEM SETUP THU HIGH ALARM 1 SET 4 20 18 98 1 WEEKDAY 4000 1 PROCESS ARAMETERS COND LOW ALARM 2 BY CYCLE CALENDAR 2 MANUAL CONTROL 2 INITIALIZATION MTR1 TOTAL 3 LIST SCHEDULE 3 CALIBRATE 3 DIGITAL INPUTS 05 42 40 LOW AL
54. programming features or restrict access to viewing only An operator password can help ensure that only authorized personnel will operate the system The Model 2250e is user friendly with a graphical screen and 16 key numeric keypad It accepts multiple inputs and is easily configured This controller can easily be upgraded in the field It s a combination of reliability accuracy security and simplicity LONWoRKS Technology gives you a high level of flexibility with the capability of adding nodes additional inputs and outputs for monitoring and control These nodes have functions such as extra relay outputs drum level inputs pH inputs conductivity inputs ORP inputs 4 20 mA inputs and water meter inputs Nodes are added using the NIN option according to a mapped network The mapped network shows the full node addition capability of the LonWorks based 2000 series controllers The mapped network for the model 2250e shows that any or all of the following nodes can be added two relay nodes two 4 20 mA input nodes two digital input nodes four remote sensor nodes any combination of pH conductivity or ORP and one makeup conductivity node The complete mapped network is shown below 2175 NIN NRLY COND COND 4 20 DIG 2250 NIN 5 8 4makeup pH 1 4 1 4 2330 NIN 2350 NIN NRLY 22 COND 420 DIG 2412
55. puts are configured from this screen If a NDIG is not installed there is no access to this menu item Configuration of the digital inputs is covered in the NDIG manual 49 6 5 7 4 Firmware Versions Sometimes it is necessary to verify the firmware version of the controller for troubleshooting purposes To obtain the firmware versions From the Main Menu press 7 SYSTEM SETUP Press 4 FIRMWARE VERSION The firmware versions will be displayed Use the arrow keys to see all firmware versions exit this screen press 6 5 7 5 Change the Security Passwords The security password can be changed from the factory default settings to any four digit value of your choice To change the security passwords From the Main Menu press 7 SYSTEM SETUP Press 5 SECURITY CHANGE PASSWORD 1 OPERATOR 2 TECHNICIAN Press 1 OPERATOR to change the operator password or Press 2 TECHNICIAN to change the technician password Use the keypad to enter the old password If the password has not been changed before the old password for OPERATOR is 1111 and the password for TECHNICIAN is 2222 Use the keypad to enter the new password Use the keypad to enter the new password a second time for verification If you lose your password contact Lakewood Instruments for assistance 6 5 7 6 Diagnostics The diagnostics screen is used for troubleshooting purposes Contact Lakewood I
56. r drain A second line should tap off of the sample line after the sensor but before the isolation valve in the sample line This second line will have an automatic blowdown valve and a flow restriction device Down stream of the flow restriction device is the blowdown receiver or drain 17 3 3 6 Orifice Sizing Chart Refer to the chart below to determine the orifice size that is required for a specific flow rate Throughput Flow Rate as a function of Orifice Size amp Steam Pressure 15 PSIG 100 PSIG 150 PSIG 0 500 Orifice 0 450 Diameter9 400 Inches 0 350 0 300 0 250 0 200 0 150 0 100 0 050 0 000 250 PSIG Ps 500 PSIG 4 900 PSIG 0 5 10 15 20 25 30 Flow Rate Ib hr X 1000 18 3 4 Electrical Installation 3 4 1 Incoming Power 115 230 VAC The Model 2250e can be powered from either 115 VAC or 230 VAC at 50 60 Hz The Model 2250e controller comes with a power cord and receptacles The power cord and receptacles are rated for 115VAC If the controller will be powered by 230 VAC the power cord and receptacles will need to be removed and the incoming power and the relay outputs will need to be hard wired The incoming power is connected to terminal block TA at the bottom right corner of the power supply board There is a hot or line input terminal 4 a neutral input terminals 2 and 3 and an earth ground input terminal 1 The hot is wired to the fuse holder located on the bottom of the enc
57. r inputs provided Has expansion slots to add additional control such as additional relay outputs 4 20 mA outputs remote sensor inputs digital inputs and 4 20 mA inputs 10 2 3 Specifications Conductivity range 0 8000 uS Conductivity Accuracy t 40 15 Conductivity Resolution 10 uS Accuracy amp Repeatability 1 096 of scale Deadband Setpoint User programmable Auto Manual outputs Menu selectable Keypad 16 key push buttons Display Illuminated 128 x 64 pixel LCD Water meter inputs 2 Contact head paddle wheel or turbine Timer Relay run time exceeded Output relays 1 Blowdown 3 selectable use Relay ratings each 10 total Power 120 240 VAC 50 60 Hz 6W Ambiant temp 32 158 F 0 70 Storage temp 32 158 F 0 70 SR2 Boiler Sensor Ratings Pressure 600 psi Max Temperature 486 Body Carbon Steel Electrodes 416 S S Insulator PEEK Languages Selectable English plus one of Spanish German French Enclosure NEMA 4X 2 4 Ordering Information 2250e LonWorks Technology based cycle sample or continuous blowdown conductivity controller Range is 0 8 000 uS has HIGH LOW alarms water meter inputs and chemical feed relays Requires SR2 or SR4 below and PL5 or PL6 is recommended CONTROLLER OPTIONS 35L Two 4 20 mA outputs configurable for remote data acquisition of Conductivity RS2L Communications node with shareware software
58. riodic maintenance is required to ensure trouble free operation of the model 2250e controller The following sections cover the required maintenance 7 1 Sensor Maintenance Routine maintenance is necessary in order to maximize the efficiency and accuracy of your sensor Clean the electrode end of the conductivity sensor at least once per month Cleaning of the conductivity sensor may need to be performed more frequently if it is in a high fouling environment e Remove power from the controller and shut the isolation valves to the sensor e Remove the sensor from its plumbing e Clean the electrodes with a wire brush A soft steel brush is preferable to a brass brush Do not use cloth to clean the electrodes Cloth has oils that will foul the sensor e lf there is oil on the sensor tips use isopropyl alcohol to clean the electrode It is recommended that you use a 10 Muriatic or HCL acid to clean the sensor if necessary Wash the sensor off with tap water Install the sensor in its plumbing Restore sample flow and check for leaks Restore power to the controller Perform a calibration of the conductivity 7 2 Replacing the Fuse The Model 2250e contains a 10A 250V fuse The fuse holder is located on the bottom of the enclosure It is accessible from the outside of the box Replacement fuses must be a fast blow type If the fuse is blown the display will be blank and the four power supply lights inside the controller enclosure
59. screen The following screen will appear SETPOINT 1000 us DEADBAND 20 US PRO 35 6 5 2 2 1 SETPOINT In the SETPOINT screen you will set the SETPOINT the DEADBAND and the OVERFEED TIME alarm The SETPOINT is the conductivity value that you are trying to maintain Check with your water treatment engineer to determine the conductivity setpoint for your system needs Follow these instructions to establish the controller s setpoint Use the keypad numbers to enter the proper conductivity setpoint and press ENT When finished you will automatically be moved down to the deadband 6 5 2 2 2 DEADBAND After the setpoint is established the controllers deadband must also be set Deadband refers to the amount of conductivity above and below the setpoint a range within which the controller will not react Due to continuous fluctuations in the conductivity level it is necessary to have this deadband range or stable readings will be difficult to obtain The Deadband should be a small percentage of the setpoint the deadband amount will be automatically put above the setpoint and the other half below it For example a conductivity setpoint of 1000 uS with deadband of 20 uS would result the relay turning on at 1010 uS and turning off at 990 uS Use the keypad numbers to enter the proper deadband setpoint and press ENT When finished you will automatically be switched
60. t 3 3 1 Sample Cycle plumbing Installation with SR2 sensor To use the model 2250e boiler controller in the sample cycle mode the plumbing installation must be done in accordance with the suggested installation drawing in the back of this manual It is very important to complete the plumbing installation exactly as it is shown in the drawing because improper installation can cause steam flash to occur which will cause erratic conductivity readings It is recommended that the Lakewood Instruments model PL5 or PL575 plumbing assembly be used Note Do not use the SR2 boiler sensor with a sample cooler The SR2 does not have temperature compensation and requires a temperature gt 200 F for proper operation Description of sample cycle plumbing installation The sample line should come out of the surface blowdown line and drop straight down to at least 2 to 3 feet below the water level of the boiler At the bottom of that line the sensor should be mounted horizontally Down stream of the sensor on a horizontal pipe should be mounted the blowdown valve and then the flow restriction device orifice union and plate or globe valve The flow restriction device should be mounted within 5 feet of the sensor Down stream of the flow restriction device is the blowdown receiver or drain 15 3 3 2 Sample Cycle plumbing Installation with 584 boiler sensor The model 2250e can be used with the model SR4 temperature compensated boiler sensor The
61. t of Time works over a 400 second example 20 seconds 20 seconds off 0 5 X 1096 X 2096 X 3090 X 40 X X X X X X X X x x 50 60 70 80 90 95 100 1 X KK xx x x xx xx xx x x xx xx XxX xx xx eK IK xx x x i xx x x xx xx xx x x xXx x x x KK 00 X Xx xx xx kK Xx xx x x 400 second example is shown because it will cover the patterns of the major percentages The patterns for odd values such as 37 or 52 cannot be shown in a 400 second time interval but they would look very much like those patterns shown for 40 and 50 respectively In an extreme case such as 99 the relay would be on for 99 20 second blocks 1980 seconds and then off for 1 20 second block 20 seconds and then on for 1980 seconds and off for 20 seconds etc To determine the total amount of chemical fed over a 24 hour period multiply the percent of time by the number of hours a day that your controller is operating then multiply by your chemical pump flow rate per hour For example We select 10 of the time our controller operates 24 hours a day and our chemical pump flow rate is 1 gallon per hour 10 x 24 hours x 1gallon 2 4 Gallons Day Hour Day From the RELAY OPTIONS screen press 4
62. tacting head meters Seametrics open collector output meters Signet 2535 and 2540 paddle wheel meters and the Autotrol 1 inch and 2 inch meters Contact Lakewood Instruments for other types of water meters Both water meter inputs are programmed in the same manner To get to the water meter configuration screen From the main menu press 5 WATER METERS This will take you to the WHICH WATER METER SCREEN Press 1 for MTR1 press 2 for MTR2 e This will take you to the WATER METER TYPES screen as shown WATER METER TYPES 1 CONTACTING HEAD 2 PADDLE WHEEL 3 DATA INDUSTRIAL 4 SIGNET 5 AUTOTROL TURB 1 IN 6 AUTOTROL TURB 2 IN 7 CHANGE MY NAME Use the keypad to select the type of water meter that you are using The next screen is the UNITS OF VOLUME screen e The water meters can be configured for gallons or liters Press 1 for GALLONS or 5 2 for LITERS If CONTACTING HEAD was selected You will be taken to the GALLONS OR LITERS PER CONTACT screen Use the keypad to enter the number of gallons or liters per contact for your specific meter then press ENT You will then be asked if you want to reset the total count for that meter to zero Press 1 for YES or press 2 for NO If PADDLE WHEEL was selected You will be taken to the PULSES PER GAL LITER screen Use the keypad to enter the pulses per gal liter for your particular water meter then press ENT You will then be aske
63. ting 0 00 will disable this feature Lakewood Instruments recommends that some time be entered if pre bleed is used is the amount of time the feed schedule relay will be on after the feed duration is completed an additional lockout time for RLY 1 2 3 and 4 relays can be programmed The lockout time prevents the other relays from operating until this time expires Setting this time to 0 00 will disable this feature The Model 2250e is equipped with both high and low conductivity alarms This menu option allows you to program the specific values for these alarms When a conductivity alarm is received it will appear as a flashing message in the middle of the display and any configured alarm relays will be activated high conductivity alarm will override the blowdown relay and force a blowdown to occur Consult your water treatment specialist when determining the proper High and Low Alarm values for your system To set the alarm setpoints HIGH ALARM 5000 uS LOW ALARM 100 uS PRO ENT ACCEPT From the MAIN MENU press 4 ALARMS Use the keypad to enter a value for the high alarm Press ENT Use the keypad to enter a value for the low alarm and press ENT Use the keypad to enter a value for the deadband and press ENT Refer to section 6 5 1 2 2 for a discussion on deadband 43 6 5 5 Water Meters The 2250e series controllers will work directly with the following types of meters dry con
64. to about 200 F For the 2 electrode boiler sensor select NONE for the temperature compensation For the 4 electrode boiler sensor select 4k NTC for the temperature compensation 48 6 5 7 1 5 CELL CONSTANT The cell constant is used to set the default calibration readings close to actual for the sensor that is used The cell constant for the 2 electrode boiler sensor is 0 108 The sensor for the 4 electrode boiler sensor is 0 300 Use the keypad to input the cell constant for your sensor Press ENT 6 5 7 2 Initialization Initialization restores the factory default settings to the controller The whole controller can be initialized or just the calibration It is suggested that you initialize the whole controller before you program the controller This will clear any random settings that may be in the controller To do so follow these instructions From the Main Menu press 7 SYSTEM SETUP Press 2 INITIALIZATION Press 2 WHOLE CONTROLLER and press ENT A warning will appear the screen see below Press 1 to proceed 2 to cancel WARNING THIS OPTION REQUIRES RE CALIBRATION AND RE PROGRAMMING PROCEED To initialize just the calibration Press 1 CALIBRATIONS instead of 2 WHOLE CONTROLLER in the procedure above The same warning screen will appear 6 5 7 3 Digital Inputs If the model 2250e controller has a digital input node NDIG installed the in
65. tpoint a range within which the controller will not react Due to continuous fluctuations in the conductivity level it is necessary to have this deadband range or stable readings will be difficult to maintain The Deadband should be a small percentage of the setpoint Half the deadband amount will be automatically put above the setpoint and the other half below it For example a conductivity setpoint of 1000 uS with deadband of 20 uS would result in the relay turning on at 1010 uS and turning off at 990 uS Use the keypad numbers to enter the proper deadband setpoint and press ENT When finished you will automatically be switched to the BLOWDOWN TIMEOUT alarm screen 6 5 1 1 3 BLOWDOWN TIMEOUT The BLOWDOWN TIMEOUT alarm is designed to notify the operator of a problem in the blowdown system such as a clogged orifice or the blowdown valve failed to open The BLOWDOWN TIMEOUT function will display a visual alarm on the display but it will NOT turn off the relay If a relay is configured as an alarm relay the BLOWDOWN TIMEOUT alarm will energize the alarm relay To disable this function set the BLOWDOWN TIMEOUT time to 0 00 Use the keypad numbers to enter the time hours and minutes before this alarm will appear and press ENT Maximum setting is 17 hours and 59 minutes After pressing ENT you will be taken to the WHEN TO ACTIVATE screen 31 6 5 1 1 4 After configuring the SET
66. traight down to at least 2 to 3 feet below the water level of the boiler At the bottom of that line the sensor should be mounted horizontally Down stream of the sensor on a horizontal pipe should be mounted the flow restriction device orifice union and plate or globe valve The flow restriction device should be mounted within 5 feet of the sensor Down stream of the flow restriction device is the blowdown receiver or drain A second line should tap off of the sample line either before or after the sensor but before the flow restriction device in the sample line This second line is used for the automatic blowdown valve The line with the blowdown valve must have a flow restriction device 16 3 3 4 Continuous Sample plumbing Installation with 584 boiler sensor The model 2250e can be used with the model 584 temperature compensated boiler sensor The SR4 sensor should be mounted down stream of a sample cooler The temperature compensation is limited to about 200 Note For proper operation the sample cooler should have adequate flow to ensure a constant output temperature of lt 200 Description of continuous sample plumbing installation The sample line should come out of the surface blowdown line and go to the sample cooler and then the boiler sensor The sensor should be mounted horizontally Down stream of the sensor on a horizontal pipe should be mounted the flow restriction device orifice union and plate or globe valve
67. ussed in detail later in this manual 29 6 5 Configuring the Relays To access the relay configuration screen from the MAIN MENU press 2 or highlight RELAYS and press ENT The following screen will appear WHICH RELAY Select the relay that you want to program 6 5 1 Configuring the Blowdown Relay Below is the RELAY OPTIONS screen The blowdown relay can be configured to operate based on a setpoint When the blowdown relay is selected for programming the following screen will appear 1 SETPOINT 2 BOILER OPTIONS 3 CHANGE MY NAME 6 5 1 1 SETPOINT When Setpoint is selected the following screen will appear SETPOINT 1000 uS DEADBAND 10 us 30 6 5 1 1 1 SETPOINT In the SETPOINT screen you will set the SETPOINT the DEADBAND the BLOWDOWN TIMEOUT alarm and setup the blowdown relay for a direct or reverse setpoint The SETPOINT is the conductivity value that you are trying to maintain Check with your water treatment engineer to determine the conductivity setpoint for your system needs Follow these instructions to establish the controller s setpoint Use the keypad numbers to enter the proper conductivity setpoint and press ENT When finished you will automatically be moved down to the deadband 6 5 1 1 2 DEADBAND After the setpoint is established the controller s deadband must also be set Deadband refers to the amount of conductivity above and below the se
68. wdown valve open until the conductivity drops below the setpoint If the reading is less than the setpoint the controller will immediately shut the blowdown valve and go into a waiting period Cycle Time The Sample Time is the amount of time that the blowdown valve is open Cycle Time is the amount of time in between samples when the blowdown valve is shut The Sample Time should be set to a small amount of time because the controller will be blowing down for the entire Sample Time If a long amount of time is set the controller will blow down longer than is necessary and will result in wasted heat and water A longer period of time is not required because if the conductivity is greater than the setpoint the valve will stay open until the setpoint is satisfied The Cycle Time will need to be set for your specific system The Cycle Time is the amount of time in between samples when the blowdown valve is shut While the blowdown valve is shut the conductivity will rise in the boiler If the cycle time is too long the conductivity will rise much higher than the setpoint and this could cause problems for the boiler Conversely if the cycle time is set too short the conductivity will never raise high enough to hit the setpoint This will result is a waste of heat and water because the controller is blowing down when it is not necessary Once the Sample Time is set it should never have to be adjusted again The Cycle Time is the one that will need to
69. will be dark when the unit is connected to power Refer to the troubleshooting section of this manual for more information about blank displays 55 8 0 Troubleshooting 8 1 Error Messages This section discusses some of the more common questions with the Model 2250e These notes are not intended to be all inclusive only to cover the most common situations If you have other questions or are need support contact the Lakewood Instruments Technical Service Department toll free at 800 228 0839 PROBLEM Alarm Flashing Conductivity HIGH ALARM Alarm Flashing Conductivity LOW ALARM Water meters not accumulating WHAT THIS MEANS Conductivity is too high with respect to the high alarm setpoint Conductivity is too low with respect to the low alarm setpoint There may be a problem with the wiring or the reed switch in the meter may be bad For water meters other than the contacting head type check the manufacturer s user manual for that particular water meter CORRECTIVE ACTION Check the High Alarm Value Check relay setpoints and deadbands Check operation of blowdown valve Use the manual relay control to help Check blowdown valve is not stuck closed or the line is restricted Check the Low Alarm Value Check relay setpoints and deadbands Check blowdown valve is not stuck open Approximately 24 volts DC should be present at the input terminal when the water meter cont

2250e MANUAL - Lakewood Instruments

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