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3-5-14. pdf; Flint WTP LOX - LIN Storage Basis of Design Calcs 3-13-14.pdf Mike, As requested, attached are the following documents in support of the construction permit for the Flint WTP improvements: : * Basis of Design for Midpoint Chlorination ® LOX/LIN storage tank calculations ® Revised LOX/LIN drawings which clarify process piping If needed, Samir can drop off hard copies. Please call me if you have any questions or require additional information. Thank you, Jeremy Jeremy N. Nakashima, Pe Associate, Senior Project Manager Eockwoad, Andrews &Newnam, Inc.” RAL A MACY COMPANY COMPANY One Oakbrook Terrace, 22nd Street and Butterfield Road, Suite 207 « Oakbrook Terrace, IL 60181 T 630.495.4123 x 6602 € 773.414.4643 www.lan-inc.com » [email protected] CONFIDENTIALITY AND PRIVILEGE NOTICE: This email communication, including any and alt attachments, (collectively, this “Communication’) is intended solely for the person(s) to whom it is addressed. This Communication may contain information that is privileged, confidential or subject to copyright. Any unauthorized use, disclosure or copying of this Communication is strictly prohibited, If you have received this Communication in error, please contact the sender immediately. If ins Communication was received in error, you are directed to immediately delete and/or, destroy all copies. xxxEND_PAGE:deq02_b004_0729_1335_448 2212014 2014022 /_093629,Jpg hifns‘i/fmail aanale cam/mailAd0/?shva= 1#inbox!144746RAdtaaR heh Porniecinr=1 4A xxxEND_PAGE:deq02_b004_0729_1335_449 2212014 2014022 /_U93602Z.jpg 8" hitns-/mail cond le com/imail//0/?shva= T#inhow 4 xxxEND_PAGE:deq02_b004_0729_1335_450 Na) INSTRUMENTS ,w, Hydro Gas Chlorination Systems Instruction Manual All HYDRO Chlorination systems are carefully designed and tested for years of safe, accurate field service. All HYDRO Chlorination systems are carefully tested prior to shipment. All HYDRO products are made of the finest materials. To ensure best operation, read these instructions carefully and completely and store them where all maintenance personnel will have access to them. Each chlorination system consists of the following: Li. 2: The vacuum regulator which mounts on the chlorine cylinder. The ejector assembly mounts directly to the pipe line, storage tank, wet well, or to a solution line. Standard accessories: a, Cylinder wrench. b. Twenty-five feet of appropriate polyethylene tubing for vacuum lines. c. Ten lead gaskets for vacuum regulator to cylinder connection. Additional parts available from any plumbing supply (or through HYDRO): a. Pressure gauge. b. Water shut off valve. c. Y-type strainer. The information contained in this manual was current at the time of printing. The most current versions of all Hydro Instruments manuals can be found on our website: www.hydroinstruments.com HGCS Rev. 8/29/13 1 xxxEND_PAGE:deq02_b004_0729_1335_451 eo FP OW ANA NAF WN 12. 13. 14. . Torque Specifications ..... . SECTION I-A: Safety Information (150 Ib. Cylinders) . . SECTION LB: Safety Information (Ton Cylinders). . SECTION II: Design and Installation Notes . SECTION II: System Installation . SECTION IV: Chlorination System Vacuum Test ... . SECTION V: Start Up of Chlorination .. . SECTION VI: Shut Down Procedure . SECTION VII: Rate Valve Operation . SECTION VII: Troubleshooting.... . APPENDIX: Servicing the Hydro System. Hydro Gas Chlorination Systems Table of Contents a. Section A-I: Cleaning the Safety Shut Off Valve and Seat .... b. Section A-II: Servicing Flow Meter Assembly .... i d, Section A-III: Replacing Rate Valve O-Ring and Servicing Rate Valve........ 13 e. Section A-IV: Disassembly of Vacuum Regulator Unit . f. & h . Section A-V: Servicing Ejector Nozzle . . Section A-VI: Servicing Ejector Check Valve Assembly ..........:cccceeeeee 15 . Section A-VI: Servicing Switchover Module Parts Drawings Hjector Performance! Curve sisicccsesccvsi yee ningaguecneseranemr amin mares Nozzle Tables Hydro Instruments Gas Chlorination Equipment Torque Specifications Max. inchelbs.|inchelbs, 20 ltem Yoke Bolts Body Boits 20 Meter Block Boits 20 Vacuum Fittings 15 20 Inlet Plug 10 15 Dummy Plug ; A 10 ltem Min. Max. footelbs. | footelbs. Yoke Half Dog 20 25 xxxEND_PAGE:deq02_b004_0729_1335_452 SECTION I-A: SAFETY INFORMATION (150 LB. CYLINDERS) TAKE CARE WITH CHLORINE! 1, Always keep chlorine cylinders in an upright position with the valve cap tightened before moving full or empty cylinders. Cylinders should be moved with care. 2. A safety chain must be placed around the cylinder and secured to a wall. Spare full cylinders should also be secured carefully. 3. For best operation and safety, the vacuum regulator and cylinders should be protected from the elements including direct sunlight. 4. Never place heaters or heat lamps directly on a cylinder. 5, Ammonia gas should NOT be stored or fed in the same room with chlorine. Contact of the gases will result in an explosive mixture. IMPORTANT NOTE: HYDRO does not recommend the use of chlorine gas manifolds. Manifolds contain pressurized chlorine gas thereby increasing the risk of a pressurized chlorine leak. HYDRO vacuum regulators are designed to mount directly onto the valve of chlorine and sulfur dioxide cylinders. Direct cylinder mounting is the easiest and safest configuration to operate and maintain. With this configuration, the chlorine gas flows under vacuum everywhere beyond the one pressure point at the chlorine cylinder valve. A typical HYDRO Model 500 series installation injecting chlorine into a pipe line using city water. The water supply to the ejector should be approximately twice the pressure of the chlorinated pipe line in order to create a sufficient vacuum at the ejector. FIGURE 1A Rate Valve Metering Tube Vacuum Line Vacuum Regulator Vent to Outside Water Supply to Ejector aa} a" cht i Y-Strainer ia xxxEND_PAGE:deq02_b004_0729_1335_453 SECTION I-B: SAFETY INFORMATION (TON CYLINDERS) TAKE CARE WITH CHLORINE! 1. Valve protection covers must be on ton container valves before they are ever moved. 2. The ton container should be levelly placed on a pair of trunions. 3. Always place container so valves are at vertical position and use only the top valve which is the gas valve. BOTTOM VALVE IS LIQUID—DO NOT USE. 4. For best operation and safety, the ton container and vacuum regulator should be protected from the elements and direct sunlight. 5. NEVER apply heaters or heat lamps directly on a chlorine container. IMPORTANT NOTE: HYDRO does not recommend the use of chlorine gas manifolds. Manifolds contain pressurized chlorine gas thereby increasing the risk of a pressurized chlorine leak, HYDRO vacuum regulators are designed to mount directly onto the valve of chlorine and sulfur dioxide cylinders. Direct cylinder mounting is the easiest and safest configuration to operate and maintain. With this configuration, the chlorine gas flows under vacuum everywhere beyond the one pressure point at the chlorine container valve. A typical HYDRO Mode! 700 series installation injecting chlorine into a pipe line using city water. The water supply to the ejector should be approximately twice the pressure of the chlorinated pipe line in order to create a sufficient vacuum at the ejector. U Ejector —— = | Vi a Waiter Supply FIGURE 1B Rate Valve Ton Container Metering Tube Vacuum Regulator Vacuum Vent to Line Outside to Ejector Gauge Y-Strainer xxxEND_PAGE:deq02_b004_0729_1335_454 SECTION Il: DESIGN AND INSTALLATION NOTES 1, The “all vacuum” system means that system will shut off at the cylinder valve, should the vacuum line be broken, if water is stopped for any reason, or if the vacuum regulator is physically damaged. 2. Choosing a vacuum regulator feed capacity: VACUUM REGULATOR SIZE SHOULD BE ON MAXIMUM POSSIBLE FLOW. Imperial Units: GPM 4 0.012) x (PPM) Dosage = PPD Gallons Per Minute Parts Per Million Pounds Per Day (C1,) D . (£69 Example: 600 GPM x 0.012 x 3 PPM = 21.6 PPD IR,500 Eh K O-0(L (56 fl In this example a HYDRO 50 PPD vacuum regulator would be adequate. a fe geval Metric Units: yes GS / N I n LPM x 0.0599 x (PPM) Dosage = GPH 2, q S 4- 4a Liters Per Minute Parts Per Million Grams Per Hour (C1,)’ la ef inh Cli 3. TOTAL BACK PRESSURE is the pressure in the pipeline to be chlorinated plus the frictigh losses in the solution line between the ejector and the point of injection at the pipeline. Ejectors capable of opet ‘ating with back pressures up to 300 Psig are available. ra 4. It is preferable that the ejector be located at the point of solution injection in side to eliminate the need for solution lines. Friction losses in the solution line will increase the ejector back pressure. Friction losses can be reduced by increasing the solution line internal diameter and limiting the number of flow restrictions and turns. Also, be sure that the solution line material is resistant to the highly concentrated chlorine mixture. Avoid solution lines wherever possible. 5. The only connection between the ejector and the vacuum regulator is the HYDRO specified black polyethylene tubing which carries the vacuum (originating at the ejector) to the vacuum regulator, allowing the system to operate. Up to 100 feet of polyethylene tubing between vacuum regulator and ejector is standard. For longer distances consult HYDRO. SECTION III: SYSTEM INSTALLATION (D INSTALLATION OF HYDRO EJECTOR (Refer to Figure 1) 1. Installation of HYDRO EJECTOR: a. Remove the diffuser from the ejector assembly and place two wraps of Teflon tape on diffuser threads. b. Do Not install diffuser into pipe line when assembled with ejector. c. Turn diffuser by hand into NPT threads of pipe line (/," or 1 '/." NPT), Place wrench on diffuser and tighten an additional one half turn maximum. d. Reconnect diffuser to ejector making sure O-rings are on each side of nozzle and diffuser. 2. Testing of ejector. (Note: The vacuum regulator should still be in the shipping case.) i. Piping hook up to ejector (Refer to Figure | and Servicing Section in this Manual). a, Ejector should be installed down stream at a sufficient distance so that chlorinated water is not re-circulated through the booster pump. b. On the water inlet side to the ejector nozzle the following should be installed: a water inlet valve, Y-strainer, and a pressure gauge. xxxEND_PAGE:deq02_b004_0729_1335_455 ii. Testing for sufficient pump pressure to operate ejector. Also checking that booster pump (if applicable) operating in the proper direction. Note 1; Ejector must have some back pressure to prevent jetting. (Jetting causes loss of vacuum) Note 2: When chlorinating into a contact chamber a tee should be installed on the solution line with a vacuum breaker to prevent siphoning. a. If operating with city water pressure (no booster pump), open the water inlet valve to the ejector and feel for suction (with your finger) at the fitting on the top of the ejector. b. Ifusing a booster pump, open the water inlet valve to the ejector and the pressure gauge should indicate a sufficient boost. (See ejector curves at the end of this manual.) If pump is operating in proper direction there should be a strong vacuum at the fitting on the top of the ejector. Feel for suction (with your finger) at the fitting on the top of the ejector. c. If the ejector has tested satisfactorily continue on to the next step (Mounting the Vacuum Regulator), (I-A) INSTALLATION OF HYDRO VACUUM REGULATOR (150 Ibs. Cylinders) NOTE: The chlorine cylinder valve is CLOSED. Do not open the cylinder until instructed to do so. ae Fe SP Examine the vacuum regulator for obvious damage. See that safety chain is secured around chlorine cylinder. Remove the cylinder protection cap from the chlorine cylinder. Remove masking tape on the back of the vacuum regulator used for shipping purposes. Place lead gasket over vacuum regulator inlet assembly. While placing lead gasket on vacuum regulator see that the filter is installed in the inlet assembly. (This filter is necessary to remove particles that may cause the vacuum regulator to leak to vent.) 7. Mount vacuum regulator on cylinder valve being sure the yoke screw is backed out far enough for sufficient clearance. While tightening the yoke screw be certain that the lead gasket stays in place. Excessive tightening can damage gasket and/or yoke screw. DO NOT USE EXCESSIVE FORCE. FIGURE 2A Vacuum tine Regulator Pressure A typical HYDRO Model 500 series installation injecting chlorine into a pipe line using a centrifugal pump. Note the location of gate valves for easy Y-strainer cleaning and practical pump maintenance. NOTE: Pump suction should be & feet away from ejector injection point. On larger pipe diameters of 6 inches or greater a distance of 10 times the pipe diameter should be maintained so that chlorinated water is not recirculated through the booster pump. NOTE: Pump suction and ejector must be from the side of pipeline, not from top of the main. xxxEND_PAGE:deq02_b004_0729_1335_456 (II-B) INSTALLATION OF HYDRO VACUUM REGULATOR (Ton Cylinders) NOTE: The chlorine container valve is CLOSED. Do not open the valve until instructed to do so. i. 2i 3. wo wna fy [LT] *~ Gate Valve After the chlorine container has been properly installed, remove the valve protector. Chlorine container valves must be in the vertical position with one valve directly above the other. Look at position of top valve. If it faces to or opens on left, a left hand vacuum regulator is required. Check the vacuum regulator to see if you have a left hand unit. . Prior to removing the valve cap covering the chlorine container valve outlet, make certain the valve is in the closed position. Proceed by removing the cap slowly. . Inspect for and remove any debris found on the chlorine container valve or on the outlet gasket surface. Do not use a screwdriver or sharp tool to clean. . Before mounting, remove all tags and tape from the vacuum regulator. NOTE: Check that all bolts are tight. . Loosen yoke half-dog until the valve plate can be pushed all the way back. . Place a new '/)¢" gasket over chlorine inlet assembly. Never use any other type of gasket or re-use the same gasket. . Mount the vacuum regulator on container valve with yoke over the valve with the inlet and outlet properly aligned, Tighten the yoke screw while making certain the gasket has not fallen out. Excessive tightening can damage the gasket or yoke screw. . Place the support bracket, found on the vacuum regulator drip leg, over the lower valve. . Warm liquid drip leg by plugging in 25-watt heater. This must be turned on 15 minutes before start-up. FIGURE 2B ine4 bags ae a Vacuum Line: Regulator A typical HYDRO basic installation injecting chlorine into a pipe line using a centrifugal pump. Note the location of gate valves for easy Y-strainer cleaning and practical pump maintenance. NOTE: Pump suction should be 5 feet away from ejector injection point. On larger pipe diameters of 6 inches or greater a distance of 10 times the pipe diameter should be maintained so that chlorinated water is not recirculated through the booster pump. NOTE: Pump suction and ejector must be from the side of pipeline, not from top of the main. L TAY, (IL) CONNECTING VACUUM LINES BETWEEN VACUUM REGULATOR, EJECTOR AND VACUUM REGULATOR VENT TO OUTSIDE (Refer to Figures 1 and 2) Ai For units of 250 PPD (5 kg/hr) or less, the upper comector on right top of vacuum regulator is for vacuum line tubing to ejector. For 500 PPD (10 kg/hr) and above units, the lower connector on the right side of the back body is for the vacuum tubing to the ejector. (Allow enough vacuum tubing for changing cylinders.) . Connect vacuum tubing to second connector on the vacuum regulator and vent to safe area outside of building. (Place bug screen outside on end of vent tubing.) NOTE: Deo Not connect vent lines from two vacuum regulators to one common vent. You must run separate vent lines to the outside, when using multiple vacuum regulators. xxxEND_PAGE:deq02_b004_0729_1335_457 RANTS INSTRUMENTS SERIES VM-150 VACUUM MONITOR INSTRUCTION MANUAL VM-150 Rev.12/27/2011 xxxEND_PAGE:deq02_b004_0729_1335_458 TABLE OF CONTENTS SECTION I: Introduction... SECTION Il: Inventory..... SECTION Ill: Specifications SECTION IV: Operation Basics A: Digital Display ....... B: LED Indicators ... C: Alarm Relays .. SECTION V: Installation xxxEND_PAGE:deq02_b004_0729_1335_459 NaN) INSTRUMENTS jx, Series OV-110 Omni-Valve Instruction Manual The information contained in this manual was current at the time of printing. The most current versions of all Hydro Instruments manuals can be found on our website: www.hydroinstruments.com OV-110 Rev. 6/17/13 4 xxxEND_PAGE:deq02_b004_0729_1335_460 Hydro Instruments Series OV-110 Omni-Valve Table of Contents I. Functions, Capabjlities: and. Constr i ction 3 1, 2: 3 4 i) 6 Z 3 4 5. Physical Design 6 7 Cc 8. 1 Safety Precautions . Function of the OV-110 . Physical Installation . Chemical Types and Ranges . Electrical Power, Inputs & Outputs . Alarm Conditions & Acknowledgement Dip Switches ONLOL MEhONS ae eTENgeE 7 . Flow Pacing (Proportional) . Residual (Set Point) . Compound Loop (PID) . Dual Input Feed Forward . Step Feed . Dual Set Point TUL. User Interface... 14 TV. Motion Control, Valve, and 10 Point Linearization 14 MN, Operation Mode Screens nen 16 VI. Configuration Mode Screens... csscescccs eee 17 VII. Advanced Calibration Mode 21 1 2 3 4 . Purge Feature (for liquid feed systems) . Dosage Method Selection . Flow Stop . External Duty/Standby and Auto/Manual control options WILL, ‘Eroubleshootingand: Maintenance ...visecsvisevses agai 23 1 2. Figures: ANPWN — . Factory Default Service . Installation Drawing . Omni-Valve Construction.. . Omni-Valve Circuit Board . Figures 4-9: Control Schemes . Figures 10-12: Valve Linearization . . Figures 13-16: Valve Body Diagrams. xxxEND_PAGE:deq02_b004_0729_1335_461 1. FUNCTIONS, CAPABILITIES, AND CONSTRUCTION 1. w SAFETY PRECAUTIONS GENERAL: Be sure to follow all applicable and prudent safety precautions when working with chemicals and electrical equipment. ELECTRICAL: The circuit board and incoming A/C power line do include electrical shock risk. Take care to avoid electrical shocks and do not touch any part of the circuit board or A/C power line unless you are certain that A/C power has been disconnected from the system. CHECK FOR DAMAGE: Before removing the product from the shipping packaging, carefully check the equipment for damage. If any product is found damaged, do not put it into operation or install it. Contact Hydro Instruments to discuss repair or replacement of the damaged equipment. Function of the OV-110: The OV-110 Omni-Valve is designed to automatically control chemical feed rate based on one or more electrical input signals. Figure 1 shows an example installation drawing. FIGURE 1 Minimum = 10 x Pips Diameter Maximum = 20 x Pipe Olameter Physical Installation: The Omni-Valve must be mounted in the chemical feed line downstream from a chemical flow meter and upstream from the feed point (i.e. ejector, vacuum pump or check valve dif- fuser). Consider Figure 1 above. NOTE: If the automatic valve is being used for liquid chemical feed such as sodium hypochlorite, having the chemical physically higher than the valve will create a hydrostatic pressure which could cause failure of the valves internal seals. Chemical Types and Ranges: For gaseous chemical feed applications, the OV-110 Omni-Valve is most commonly used for chlorine, sulfur dioxide, ammonia, and carbon dioxide. For liquid chemical feed applications, the OV-110 Omni-Valve is most commonly used for sodium hypochlorite, hydro- chloric acid, sodium bisulfite, sodium bisulfate, sodium chlorite, and aqueous ammonia solutions. Consult Hydro Instruments for usage in other chemical applications and for available feed rate ranges. 3 xxxEND_PAGE:deq02_b004_0729_1335_462 5. Physical Design: (See Figure 2) The Omni-Valve is the combination of a microprocessor controller and control valve in one compact unit. Both the microprocessor and the valve motor assembly are housed together in one NEMA 4X rated enclosure. The valve body is mounted onto the bottom face of the enclosure. The valve body is constructed of solid machined PVC parts. There are several different valve body sizes available. Valve shafts, valve stems, valve seats, and O-ring materials are selected for maximum corrosion resistance to the chemical being used. Two PTFE shaft seals separate the chemical from the interior of the enclosure. There is also a vent port to the outside in between the two shaft seals for additional protection against chemical entry to the enclosure. A variety of valve seats and valve stems are available to provide many different chemical feed rate ranges. FIGURE 2 6. Electrical Power, Inputs & Outputs: (See Figure 3) The Omni-Valve has the following electrical connections. a. b. Offered in either 120 VAC or 240 VAC. (50 to 60 Hz) Three analog input channels. Each channel has dip switches to select between 4-20mA and 0-10V. Each channel has a 150 Ohm input impedance. FLO — Used for water flow meter or proportional control input signals. RES — Used for residual, ORP, or other set point input signals. DOS - Various user selected uses available. See Sections II and VII.2. Four 24 VDC relay input channels (SF1 — SF4). Used for Step Feed Control. NOTE: The accept- able range is 12 to 24 VDC. See Section IL.6. If not using step feed control, then SF3 can be used for external selection of duty/standby. Also, (if enabled in Section VIL4 then) SF4 can be used for remote control of Auto/Manual mode. See Figure 3 and Section VIL4. Two 4-20mA analog output channels. Both represent chemical feed rate (based on valve position). Each channel has a 250 Ohm output impedance. There are two relays. Both NC and NO connections are available. Rating is 10 Ampere (resistive) and 250 VAC 250 VDC, See Figure 3 and Section VI screen 6b. This relay can be selected to be a common alarm relay or to indicate AUTO or MANL operation. xxxEND_PAGE:deq02_b004_0729_1335_463 f. Modbus RS-485 communication. The Omni-Valve is equipped for remote display and communication using the modbus RS-485 standard. To do this, you must define the node, baud rate and parity of the system. For more information on how to setup modbus refer to the Modbus Communication Setup document. 7. Alarm Conditions & Acknowledgement: Alarm conditions are displayed on the alarm screen in operation mode. See Section V. Acknowledgement — Press the “minus” © key to acknowledge the alarm. NOTE: Any of the below contacts will activate this alarm relay. The alarm is non latching. — — Control Mode Alarm Condition Description Ei Action Flow Pacing Flow Signal Loss PV1 Signal below 4 mA Valve Close or Hold Position** Flow Pacing Low Flow PV1 Signal below set point* —_|None Residual/ORP Res/ORP Signal Loss |PV2 Signal below 4 mA Valve Close or Hold Position** Residual/ORP Low Residual PV2 Signal below set point*** |None Residual/ORP High Residual PV2 Signal above set point*** {None Compound Loop roy signal Loss _|PV1 Signal below 4 mA Switch to Residual/ORP Condn 1 or Feed Forward Compound Loop : 7 or Feed Forward Low Flow PV1 Signal below set point* [None Compound Loop 2 ‘ Z ‘ or Feed’ Fotward Res/ORP Signal Loss |PV2 Signal below 4mA Switch to Flow Pacing Control Compound Loop ‘ ; TT oe Reed Forward Low Set Point PV2 Signal below set point*** ;None Compound Loop j,,. ‘ . 2 gees or Feed Forward High Set Point PV2 Signal above set point None 8. Dip Switches: These switches are used to select whether the analog input channels are to be used for 4-20 mA or 0-10 Volts. They are always set for 4-20 mA at the factory. (See Figure 3.) a. Switch 1 and 2 set the FLO (PV1) input channel for a 4-20 mA input when switch 1 is on (up) and switch 2 is off (down). The FLO input channel is set for 0-10 Volts when switch 1 is off (down) and switch 2 is on (up). b. Switch 3 and 4 set the RES (PV2) input channel for a 4-20 mA input when switch 3 is on (up) and switch 4 is off (down). The RES input channel is set for 0-10 Volts when switch 3 is off (down) and switch 4 is on (up). Switch 5 and 6 set the DOS (PV3) input channel for a 4-20 mA input when switch 5 is on (up) and switch 6 is off (down). The DOS input channel is set for 0-10 Volts when switch 5 is off (down) and switch 6 is on (up). xxxEND_PAGE:deq02_b004_0729_1335_464 Dip switches for FLO, RES, and GND inputs Pi led ll 123456 78 ze Pin connector to stepper motor OOO0O0000 Po MSW GND NO1 CO1 NC1 NO2 CO2 NC2 power | Output relay alarms or Auto/Man DOS GND RES GND FLO GND AOI GND AO? ‘| Analog Outputs GND SFi+ SF1- SF2+ Analog Inputs 12VDC to 24VDC (step feed inputs) SF (See Section VII.4.a) External Duty/Standby Control SF4 (See Section V!I.4.b) External AUTO/MANL Control OMNI-VALVE Date: June 2013 CIRCUIT BOARD Dwg.No. OV-PCB-2 € 3YHndld xxxEND_PAGE:deq02_b004_0729_1335_465 il. CONTROL METHODS The OV-110 Omni-Valve offers the following control methods. The control method is selected in the Configuration Mode (See Section VI). 1. Flow Pacing (Proportional): Figure 4 below shows an example installation. a. Application: This control method is suitable when water quality is consistent, but water flow rate is variable. Control Signals: In this case, a 4-20mA (or 0-10V) signal from the water flow meter (measuring water flow just upstream from the injection point) is input to the FLO/GND input channel of the OV-110. NOTE: If desired, a proportional 4-20mA control signal from any PLC can be used in the same fashion. Control Concept: Chemical feed rate is adjusted in direct proportion to the input signal with no delay. : . Initial Settings: In the Configuration Mode (Section V1), the flow settings will need to be adjusted to match the water flow meter being used. User Interaction: During operation, the user only needs to adjust the dosage setting to adjust the ratio of chemical feed rate to water flow rate. Optionally the dosage can be remotely adjusted by means of the DOS/GND input channel. See Section VU.2. FIGURE 4 — FLOW PACING Gas Sensor xxxEND_PAGE:deq02_b004_0729_1335_466 2. Residual/ORP (Set Point): Figure 5 below shows an example installation. Application: This control method is suitable when water quality is variable, but water flow rate is constant or relatively steady. Control Signals: Jn this case, a 4-20mA (or 0-10V) signal from the residual analyzer (measuring residual just downstream from the injection point) is input to the RES/GND input channel of the OV-110. Control Concept: Chemical feed rate is periodically adjusted in order to keep the resultant chlorine residual (or ORP or similar chemical concentration) on the user determined set point. a. i. ii. i. ii. iii. Sample point selection is very important. Sample point must be at least 10 x pipe diameter downstream (to ensure coniplete mixing prior to sampling) and the lag time (“lag time” = the time it takes the chemical to travel from the Omni-Valve to the residual analyzer) should be minimized to optimize control (ideally limit this time to less than 5 minutes). The Omni-Valve will only adjust chemical feed rate once every lag time. Each time the lag time expires, the Omni-Valve will compare the residual reading with the residual set point and if the residual reading is not on set point, then the chemical feed rate will be adjusted to bring the residual back toward the set point. . Initial Settings: In the Configuration Mode (Section VI): The residual settings will need to be adjusted to match the residual analyzer that is being used. The lag time will need to be measured on site and then entered. Dead Band: The Dead Band allows for an adjustable range around the set point that is consid- ered acceptable for residual. As long as the residual reading is within this range (+ or -) from the set point, then the residual is considered to be on set point. iv. Integral: The Integral “I” controls the magnitude of each chemical feed rate adjustment. The typical range is 10% <1 < 30%. If the integral setting is too low, then the Omni-Valve will be too slow in making adjustments and if the integral setting is too high, then it will continually overshoot the set point (residual oscillating between too high and too low). User Interaction: During operation, the user only needs to adjust the residual set point. Optionally the set point can be remotely adjusted by means of the DOS/GND input channel. See Section VI.2. ~ FIGURE 5 — RESIDUAL (SET POINT) Minimum = 78 x Pipe Diameter Maximum = 20 x Pipe Diameler xxxEND_PAGE:deq02_b004_0729_1335_467 3. Compound Loop (PID): Figure 6 below shows an example installation. a. Application: This control method is suitable when both water quality and water flow rate are vari- able. Control Signals: Jn this case, two input signals are required: i. A4-20mA (or 0-LOV) signal from the water flow meter (measuring water flow just upstream