Instruction Manual
Contents
1. 15 4 1 Output Adjustment Controls 15 4 2 Start Up Priming 15 4 3 Output Adjustment 16 GALIBRATION ep 17 MAIN TENANG E eiie 19 6 1 Cleaning Liquid End in place 19 6 2 Cleaning Liquid End disassembled 20 6 3 Changing Liquifram 21 6 4 Liquid Handling Assembly Explod View 22 6 5 Liquid Handling Assembly Parts List 23 6 6 Drive Assembly Parts List 24 6 7 Drive Assembly Explod View 25 TROUBLESHOOTING 26 1 0 UNPACKING Along with your Uni Dose Series U pump your carton will contain the following items Please notify the carrierimmediately if there are any signs of damage to the pump or its parts Notify your pump supplier if any of the following parts are missing Vy Tubing Your carton will contain three 3 rolls Injection Check of tubing The clear vinyl tubing is for Valve connection to the SUCTION SIDE OF THE PUMP HEAD ONLY Ceramic Foot Bleed Priming Value Weight Valve Foot Valve 2 0 PRE INSTALLATION INSTRUCTIONS The following precautions should be taken when working with Uni Dose metering pumps Please read this section carefully prior to installation Precautions2. 3 Pump suction lift is too high 4 Suction tubing is curved or coiled in tank 5 Fittings are overtightened 6 Air trap in suction valve tubing 7 Air leak on suction side 26 SOLUTION 1 Check outlet plug in pump 2 Always prime pump with speed at 80 if equipped and stroke at 100 3 Foot Valve must be vertical See Foot Valve Installation Section 3 4 4 Maximum suction lift is 5 ft 1 5 m Reduce suction lift or change to flooded suction 5 Suction tubing must be vertical Use tubing straightener supplied with pump See Section 3 4 6 Donotovertighten fittings This causes valves to distort and not seat properly which causes pump to leak back or lose prime 7 Suction tubing should be as vertical as possible AVOID FALSE FLOODED SUCTION See Section 3 2 1 8 Check for closed valves or blockage in pressurized line Eliminate problem and reprime pump if necessary See priming Section 4 2 When pump is primed reconnect discharge tubing 1 Refill container with solution and reprime See Section 4 2 2 Foot Valve must be vertical See Foot Valve Installation Section 3 4 3 Maximum suction lift is 5 ft 1 5 m Reduce suction lift or change to flooded suction 4 Suction tubing must be vertical Use tubing straightener supplied with pump See Section 3 4 5 Donotovertighten fittings This causes valves to distort and not seat properly which
3. 5 Once a solid stream of solution begins to exit the pump head or return tubing on the bleed priming valve close valve by turning knob clockwise Disconnect the power cord 6 The pump is now primed 7 Proceed to output adjustment Section 4 3 Lf the pump does not self prime remove the fitting or bleed priming valve on the discharge side of the pump head Remove the Uni Valve and pour water or solution into the port until the head ts filled Replace valve then follow start up priming steps 43 Output Adjustment Once the pump has been primed an appropriate output adjustment MUST be made pump output should be calculated and adjustments made accordingly Calculate the total output of the pump as follows PUMP OUTPUT MAX PUMP OUTPUT x SPEED x STROKE Example U131 281 Use MAX Output From dataplate on bottom center of pump control panel 24 GPD gallons per day If the pump is set at 60 speed and 70 stroke length the approximate pump output is 24 0 x 0 60 x 0 70 10 08 GPD gallons per day Divide by 24 hours in one day to calculate GPH gallons per hour Lf pump is not equipped with speed adjustment calculate by Max Pump Output x Stroke only 5 0 CALIBRATION Once installation is complete and the approximate output has been determined the pump may be calibrated to adjust speed if equipped and stroke for your actual desired output 1 Be sure the pump is primed and discharge tubing and
4. Valve 2 0 n 60 mm Well Pump for sediment accumulation Figure 7 Well Pump System 10 the Uni Dose Pressure Tank 3 3 Tubing Connections A Use only Uni Dose tubing DO NOT USE CLEAR VINYL TUBING ON THE DISCHARGE SIDE OF THE PUMP The pressure created by the pump can rupture the vinyl tubing C Before installation all tubing must be cut with a clean square end D Valve and head connections from the factory are capped or plugged to retain pre prime water Remove and discard these caps or plugs before connecting tubing 3 8 OD Tubing Coupling PIPE WRENCH ON Compre aver _ Clamp COUPLING NUTS e CSG FITTINGS Push and hold tubing down 2 while tightening 1 coupling nut Groove Y IESS Figure 8 Tubing Connections 3 4 Foot Valve Ceramic Weight installation The foot valve acts as a check valve to keep the pump primed in suction lift applications The valve is designed to be submersed in the solution tank or drum and must sit in a vertical position at the bottom Position approximately two 2 inches 50 mm off the bottom if the tank or drum contains sediment The suction tubing straightener when assembled positions the foot valve and suction tubing in a vertical position 1 Attach the foot valve to one end of the suction tubing see Tubing Connections section 3 3 Asse
5. Injection Check Valve are installed as they would be in normal service i e including factors such as injection pressure fluid viscosity and suction lift 3 Place the foot valve in a graduated container with a volume of 1000 ml or more 4 Start the pump and run until all the air is exhausted from the suction line and head 5 Disconnect power to the pump Refill graduated container to a level starting point 6 Using a stopwatch or timer start the pump and run for a measured amount of time 50 pump strokes minimum The longer the time period the more confident you can be of the results Be sure to count the number of strokes during the calibration period when making comparisons 7 Disconnect power to the pump Note the time elapsed in relation to volume displaced in the graduate Now calculate the output in the time unit you choose minutes hours days etc 8 If the output is too low or too great adjust speed and or stroke estimating required correction and repeat steps 1 7 Tee y Pressure Line A 3 t5 _ Injection Es Check Valve san vy Uni Dose p Pump B tUr Suction E Graduate Tift 1000 ml Min Foot EL Valve J B Figure 12 Calibration 18 6 0 MAINTENANCE A WARNING ALWAYS wear protective clothing face shield safety glasses and gloves when performing any maintenance or replacement on your pump Read this entire section befo
6. PART DUANTIT NO NO DESCRIPTION LE 281 30999 Injector Fitting 30995 Uni Valve Asm 31623 Seal Flexprene 30620 Valve Housing PVC 26136 Clamp Ring 10299 Coupling Nut 27342 10 Tubing 375 O D Black Polyethylane 31900 Head 0 8 SI PVC 10340 Screw 10 24 x 3 4 S S 30981 Liquifram 0 8 SI Flexiprene 10469 06 Tubing 375 O D Vinyl 31565 Spring Hastelloy 30840 Foot Valve Seat 10123 Strainer Polypropylene 31635 Injector Check Back Pressure Valve gt 3 30986 Discharge Valve Assembly 30987 Suction Valve Assembly 30988 Foot Valve Assembly 30989 Head Assembly LE 281 32293 Tubing Straightener 34744 Bleed Priming Valve 25636 10 Tubing 250 OD PE 25631 Coupling Nut Parts included in Spare Parts Kit SP 281 23 6 6 Drive Assembly Parts List Key Na Model Part No De scription Qty 1 U 30827 Disk 1 2 U 10973 Seal 1 3 0011 0021 0031 004 32370R EPU 1 U121 U131 U141 All 230V Models 323716 EPU 1 4 U 10166 O Ring 1 5 U 32367 Bumper 1 6 U 10422 Retaining Ring 1 7 U 25963 Washer Nylon 1 8 U 30391 Washer Rubber 1 9 U1 35744 Dual Pin 1 10 UO 36254 Pulser 1 U1 36255 Pulser 1 11 U1 35743 Speed Shaft 1 12 U1 34497 O Ring 1 13 U 25414 Spri
7. U V Resistant Polyethylene copolymer PVC polyvinyl chloride Chemical compatibility of the Uni Dose with the following solutions is rated as good For chemicals not listed please contact your local representative or the factory Alum Sodium Carbonate Calcium Hypochlorite Sodium Hydroxide Muriatic Acid 5 Hydrochloric Sodium Hypochlorite Acid Sodium Hexametaphosphate Polyphosphates Sodium Phosphate Potassium Permanganate 1096 Sodium Thiosulfate Sodium Bicarbonate Vinegar DISCLAIMER OF WARRANTY AND LIABILITY Although the information set forth herein is presented in good faith and believed to be correct on the date of issuance Liquid Metronics Division Milton Roy Company makes no guarantee or representation as to the completeness or accuracy thereof and disclaims all liability for any loss or damage resulting from use or reliance upon any information recommendations or suggestions contained herein LIQUID METRONICS DIVISION MILTON ROY MAKES NO EXPRESS OR IMPLIED REPRESENTATIONS OR WARRANTIES AS TO THE FITNESS MERCHANTABILITY OR ANY OTHER MATTER WITH RESPECT TO THE INFORMATION CONTAINED HEREIN OR ANY PRODUCT OR SUBSTANCE REFERRED TO HEREIN whether used alone or in combination with any other material Nothing contained herein is to be construed as a recommendation to use any product in conflict with any patent The data in all tables are based on samples tested and are not guaranteed for all samples or other applic
8. poses Clothing ALWAYS wear protective clothing face shield safety glasses and gloves when working on or near your metering pump Additional precautions should be taken depending on the solution being pumped Refer to MSDS precautions from your solution supplier Ad Water Pre Prime All Uni Dose pumps are pre primed with water when shipped from the factory If your solution is not compatible with water disassemble the Pump Head Assembly Thoroughly dry the pump head Uni Valves and Liquifram diaphragm Reassemble head assembly tightening screws in a crisscross pattern Refill the pump head with the solution to be pumped before priming the pump this will aid in priming Ad Solution Compatibility Please refer to the Chemical Compatibility Chart on page 6 for the materials of construction of your pump Should you have any further compatibility questions on your Uni Dose Pump please call the Liquid Metronics Customer Service Department Ax tuning Connections Inlet and outlet tubing sizes must not be reduced Make certain that all tubing is SECURELY ATTACHED to fittings prior to start up See Section 3 3 Tubing Connections ALWAYS use Liquid Metronics supplied tubing with your pump as the tubing is specifically designed for maximum compatibility with the pump operation It is recommended that all tubing be 4 shielded to prevent possible injury in case of rupture or accidental damage Fittings And Machine T
9. rem Uni Dose 15 Gallon j Solution Tank p R N Foot _ Wi Fas d 2 Valve Valve A PENES 2 0 In 50 mm 2 0 In 50 mm Spacefor Space for sediment accumulation sediment accumulation Figure 5 Tank Mount 9 Suction Lift Shelf Mount The pump may be mounted on a shelf Flow e Injection customer supplied maintaining Check Vahe suction lift of less than 5 ft 1 5 m A Uni Dose mounting kit part number 10461 is available for securing the pump to a shelf 1 1 Solution Drum 2 0 In 50 mm Space for Sediment Figure 6 Shelf Mount 3 2 3 Injection into a Well Pump System M Accumulation J N Uni Dose Pump 5 Nd TE M Tubing gt Straightener f Assembly If the Uni Dose pump is to be used in conjunction with a well pump the voltage of the Uni Dose pump must match the voltage of the well pump Install the injection check valve of your Uni Dose pump into a pipe tee that is installed in the water line going to the pressure tank The injection valve must be installed vertically arrows pointing upward on the bottom side of the water line to prevent backflow into pump s discharge line Uni Dose Pump Globe Gate Valve Unl Dose P mmt 15 Gallon ye Tank Solution Injection Foot J WW Valve Asm 75
10. 2 Spare Parts SP 281 3 Replace Liquifram See Section 6 3 4 Longer tubing runs may create frictional losses sufficient to reduce pump s pressure rating Consult factory for more information 5 Remove foot valve strainer clean and reinstall 1 Check outlet plug in pump 2 Disassemble pump and measure the resistance of the EPU across the EPU wires Resistance reading should be 76 87 Ohms at 20 C 68 F 115VAC pump or 307 353 Ohms at 20 C 68 F 230VAC pump Also check EPU leads to ground Consult supplier or factory 3 The pulser should be replaced if EPU checks out OK Consult supplier or factory 1 Move injection point to a pressurized location 2 Make sure spring loaded injection check valve is installed properly 3 Replace pulser resistor or wire assembly Consult factory 29 OPTIONAL ACCESSORIES To complete your installation the following accessories are available SOLUTION TANKS Model 34054 15 Gallon White Polyethylene Tank Model 34055 35 Gallon White AGITATORS Polyethylene Tank il WALL MOUNT 27591 Agitator 115V Model 34643 For use with Model 34055 tank Wall Mount Bracket 8 Post Office Square Uni Dose dest MA M ae FAX 800 UNI DOSE or 800 864 3673 Manufactured by Liquid Metronics Division Milton Roy http www Imipumps com
11. OM TO PUMP TUBING HEAD IN FITTING TO SOLUTION TANK OR DRUM Figure 11 Bleed Priming Valve A Warning The return line must be secured to insure pumped solution will return to supply tank DO NOT submerge return line in solution 4 0 START UP and ADJUSTMENT The pump is normally self priming if suction lift is 5 ft L5 or less and the steps below are followed E Pumps are shipped from the factory with water in the pump head to aid in priming 41 Output Adjustment Controls Note Uni Dose pumps are available with speed and stroke adjustment or with stroke adjustment only 1 Speed Adjustment Speed control provides adjustment of the percent of maximum strokes per minute Turning this knob clockwise increases stroke frequency 2 Stroke Adjustment Stroke control provides adjustment of percent of maximum Liquifram diaphragm travel Turning this knob clockwise increases percent output per stroke N Start Up Priming gt Read this entire section completely before proceeding When all precautionary steps have been taken the pump is mounted and the tubing is securely attached you may now prime the pump 1 Plug the pump in 2 While the pump is running set the speed knob if equipped at 80 and the stroke knob at 100 3 Open bleed priming valve if installed by turning knob counter clockwise 15 4 The suction tubing should begin to fill with solution from the tank
12. __ nstructon Manual Series U Electronic Metering Pumps For file reference please record the following data Model No Serial No Installation Date Installation Location When ordering replacement parts for your Uni Dose Series U Pump or Accessory please include the complete Model Number and Serial Number of your unit 8 Post Office Square Acton MA 01720 USA U ni Dose TEL 508 263 9800 FAX 800 UNI DOSE or 800 864 3673 Manufactured by Liquid Metronics Division Milton Roy http www Imipumps com 150000 M Replaces same of Rev C 5 97 1845 C 7 01 Contents 1 0 2 0 3 0 4 0 5 0 6 0 7 0 UNPAGKING 3 PRE INSTALLATION INSTRUCTIONS 4 2 1 PrecaulionS 4 2 2 Chemical Compatibility Chart 6 INSTALLATION 7 3 1 Pump Location and Installation 7 3 2 Pump Mounting 7 3 2 1 Flooded Suction 8 3 2 2 Suction Lift 8 3 2 3 Injection into Well System 10 3 3 Tubing Connections 11 3 4 Foot Valve Tubing Installation 11 3 5 Injection Check Valve Installation 13 3 6 Bleed Priming Valve 14 START UP and ADJUSTMENT
13. ations Write to us for our current sales specifications 3 0 INSTALLATION 3 1 Pump Location and Installation Locate pump in an area convenient to solution tank and electrical supply The pump should be accessible for routine maintenance and should not be subjected to ambient temperatures above 110 F 43 C If the pump will be exposed to direct sunlight Liquid Metronics black UV resistant tubing should be installed 3 2 Pump Mounting Common Errors To avoid siphoning do not install your Uni Dose pump so that it pumps downhill or into the suction side of a pump Your Uni Dose metering pump must be mounted so that the suction and discharge valves are vertical NEVER position pump head and fittings horizontally Rubber Pad Placement Tohelp reduce the noise of your Uni Dose pump we recommend installing the four 4 rubber foot pads as illustrated here 3 37 85 6 50 12 7 mm 37 04 mm A ed I 3 28 D RUBBER PADS TYP 4 PLACES Figure 2 Rubber Pad Replacement 3 2 1 The pump can be mounted in one of two ways Flooded Suction Ideal Installation The pump is mounted at the base of the storage tank This installation is the most trouble free and is recommended for very low outputs solutions that gasify and high viscosity solutions Since the suction tubing is filled with solution priming is accomplished quickly and the c
14. causes pump to leak back or lose prime 6 Suction tubing should be as vertical as possible AVOID FALSE FLOODED SUCTION See Section 3 2 1 7 Check for pinholes cracks in tubing Replace if necessary 27 TROUBLESHOOTING continued PROBLEM Leakage at tubing Low Output or Failure to Pump Against Pressure Failure to Run Excessive Pump Output POSSIBLE CAUSE 1 Worn tubing ends 2 Loose or cracked fitting 3 Worn Uni Valves 4 Solution attacking Liquid Handling Assembly material 1 Pump s maximum pressure rating is exceeded by injection pressure 2 Worn Uni Valves 3 Ruptured Liquifram 4 Tubing run on discharge may be too long 5 Clogged foot valve strainer 1 Pump not plugged in to live outlet 2 EPU failure 3 Pulser failure 1 Siphoning 2 Little or no pressure at injection point 3 Excessive strokes per minute 28 REMEDY 1 Cut about 1 25 mm off tubing and then replace as before 2 Replace fitting if cracked Carefully hand tighten fittings Do not use pipe wrench Once fitting comes into contact with valve tighten an additional 1 8 or 1 4 turn 3 Replace Uni Valves See Section 6 2 Spare Parts SP 281 4 Consult Uni Dose Chemical Compatability Chart Sec 2 2 or factory 1 Injection pressure cannot exceed pump s maximum pressure See pump dataplate 2 Worn Uni Valves may need replacement See Section 6
15. cept the injection check valve Use Teflon tape or pipe dope to seal the pipe threads only When installing the Injection Check Valve be sure to position it so that the valve enters the bottom of your pipe in a vertical position Variations left and right within 80 are acceptable see figure 10 After cutting an appropriate length of tubing connect tubing to the injection check valve then back to the discharge side of the pump head top side making sure it does not crimp or come in contact with hot or sharp surfaces 1 PIPE TEE d REDUCING BUSHING 1 TO 1 2 NPT CUSTOMER SUPPLIED gt THREADS ONLY Typical Injection Check Valve Installations Z PIPE CR0SS SECTION INJECTION CHECK CORRECT USE TEFLON TAPE VALVE HERE ON PIPE 80 ACCEPTABLE VARIATION Do Not Use INJECTION m TEFLON TAPE CHECK ON MACHINED VALVE THREADS Figure 10 Calibration 3 6 Bleed Priming Valve Uni Dose pumps include a bleed priming valve assembly which may be installed on the discharge side of the pump head see section 6 4 This valve will allow you to de pressurize the discharge tubing without disconnecting the tubing from the fittings which simplifies priming Be sure to connect the solution return line as shown below Bleed Priming Valve DISCHARGE 1 4 TUBING TUBING CONNECTOR 1 INCH JL UM Y BOTT
16. hance of losing prime is reduced Tee B E Injection x Check Valve LMI 35 Gallon Solution Tank Aa l ERE CNN E 8 INCORRECT CORRECT Avoid this type of false flooded suction Figure 3 Flooded Suction Installation A DO NOT immerse pump in solution 3 2 2 Suction Lift Maximum suction lift is 5 ft 1 5 m for solutions having the specific gravity of water For denser solutions consult the factory Suction Lift Wall Bracket Mount 1 Injection g Check Valve c Pisum ire The pump may be mounted using Uni Dose O Wall Mount Bracket Assembly part no 34643 directly above the solution tank A pump mounted in this manner allows for Unl Dose Pump FrontMout E Hn S easy changing of solution du S tanks or drums it us dE 3 Solution i S Tank 20 50 Space for sediment NUI S accumulation Ld N SSS Figure 4 Wall Bracket Mount Suction Lift Tank Mount The pump may be mounted on a molded k tank Uni Dose 15 gallon tanks part no Tine Goo 34054 and 35 gallon tanks part DUM e Injection ovi 34055 are suitable for pump mounting 1 _ Uni Dose B EE BB f Uni Dose t Gi Pump Uni Dose LG lt pir
17. hreads All fittings should be hand tightened to a maximum of s to 1 4 turn after the fitting contacts the Uni Valve DO NOT OVERTIGHTEN FITTINGS Overtightening or use of a pipe wrench can cause damage to the fittings Uni Valves or pump head causing the pump to LOSE PRIME OR NOT FUNCTION DO NOT use Teflon tape or pipe dope to seal threads Teflon Tape may only be used on the 1 2 NPT thread side of the Injection Check Valve before installing in a pipe line or tee Plumbing Always adhere to your local plumbing codes and requirements Be sure installation does not constitute a cross connection Check local plumbing codes for guidelines Liquid Metronics is not responsible for improper installations Electrical Connections WARNING to reduce the risk of electrical shock the metering pump must be plugged into a grounded outlet with ratings conforming to the data on the pump control panel The pump must be connected to a good ground DO NOT USE ADAPTERS All wiring must conform to local electrical codes INCORRECT CORRECT Figure 1 Electrical Connections 2 2 CHEMICAL COMPATIBILITY CHART Uni Dose pumps are designed specifically for water conditioning Other applications may require the use of chemicals not compatible with the materials of construction of the Uni Dose Materials of Construction Flexiprene thermoplastic Polypropylene elastomer vulcanizate Noryl Macroflex an elastomeric
18. mble the suction tubing straightener by pushing together alternating yellow and black tubes Adjust the length of the tubing straightener by pushing tubes further together so when placed over the suction tubing and sitting on the foot valve approximately three 3 inches 75 mm of tubing exits the tubing straightener on the side to be connected to the pump Place foot valve tubing and suction tubing straightener into the solution tank Check that the foot valve is vertical and approximately two 2 inches 50 mm from the bottom of the tank or drum see figure 9 Connect the other end of the tubing to the suction side of the pump head bottom side Proper Foot Valve Position Uni Dose Uni Dose a Pump D Pump ig m N Ko a Y Y IT 7 Use Suction Tube Solution Solution PR Tank 2 Foot Valve Ld j Must Remain L i 8 Vertical Foot Valve S 2 011 50 mm ed Sideways WILL NOT PRIME For Sediment Accumulation INCORRECT CORRECT Figure 9 Foot Valve Position 12 3 5 Injection Check Valve Installation The Injection Check Valve prevents backflow from a treated line Connect the Injection Check Valve to your DISCHARGE outlet line Any size NPTF fitting or pipe tee with a reducing bushing to 1 2 NPTF will ac
19. ng 1 14 U1 30803 Gasket 1 15 U1 307095 Speed Knob 1 16 U 30306 Screw 4 17 4011 0021 0031 9041 10626 Varistor Assembly 115V 1 0121 0131 U41 W012 0022 0032 0042 31255 Varistor Assembly 230V US 1 0122 0132 0142 W013 0023 0033 U048 10627 Varistor Assembly 230 250 1 0123 0133 0143 W015 0025 0035 U045 0125 0135 0145 1016 0026 0036 U046 0126 0136 0146 W017 0027 0037 0047 0127 0137 0147 18 U01 003 31044 Stroke Dial 1 U02 U12 36178 Stroke Dial 1 U04 U14 33876 Stroke Dial 1 19 U 302956 Stroke Knob 1 20 U01 31066 Resistor Assembly 1 U02 29797 Wire Assembly 1 U 32357 Rubber Foot Pad not shown 4 24 ENAZ RES KINO 2X 3 ie on 9 MIIA J ASSY nd3 ANNOYS NYO GNNOYS NBD e a V 33 d 25 Drive Assembly Exploded View 6 7 7 0 TROUBLESHOOTING PROBLEM Pump Will Not Prime POSSIBLE CAUSE 1 Pump not plugged in to live outlet 2 Output knobs not set properly 3 Foot Valve not in vertical position on bottom of tank 4 Pump suction lift too high 5 Suction tubing is curved or coiled in tank 6 Fittings are over tightened 7 Air trap in suction tubing 8 Too much pressure at discharge Pump Loses Prime 1 Solution container ran dry 2 Foot Valve is notin a vertical position on the bottom of the tank
20. nnect the discharge tubing to the injection check valve 19 4 Turn the pump on and let it pump at full output for approximately one minute then return the output to the normal operating setting 6 2 Cleaning Liquid End Disassembled If the solution being pumped forms deposits which cannot be cleaned in place with the cleaning solution the head and valves should be disassembled and cleaned as frequently as experience indicates is necessary as follows WARNING DO NOT USE WATER TO FLUSH LIQUID END IF YOUR SOLUTION REACTS WITH WATER 1 Turn off the metering pump Carefully depressurize and disconnect the discharge line from the injection check valve and place the end of the tubing in an empty container Carefully lift the foot valve out of the solution tank and place it in a container of water Turn the pump on to flush the head and tubing with clear water Turn the pump off Disconnect tubing from the suction and discharge valves at pump head Remove head by unscrewing four 4 pump head mounting screws Unscrew valve fittingsandremove Uni valves from fittings Care should be taken when removing and cleaning valves lo prevent damage to any sealing surface DO NOT PINCH OR OTHERWISE DEFORM THE UNI VALVE DONOT SCRATCH THE SURFACE OF THE LIOQUIFRAM diaphragm Soak and clean all Uni valves with a suitable cleaning solution Inspect all valves and Liquifram diaphragm for imperfections Replace as nece
21. re proceeding WARNING Extreme care should be taken to avoid spilling any solution from the tubing during these procedures 6 1 A Cleaning Liquid End In Place Many water conditioning additives tend to be alkaline and scale forming The following cleaning procedure may be used as often as necessary to ensure proper performance from your Uni Dose pump WARNING DO NOT USE WATER TO FLUSH LIQUID END IF YOUR SOLUTION REACTS WITH WATER 1 Turn off the metering pump Carefully lift the foot valve out of the solution tank and place it in a container of water Carefully depressurize and disconnect the discharge line from the injection check valve and place the end of the tubing in the an empty container Turn the pump on to flush the head and tubing with clear water The metering pump should be turned off when moving the foot valve from one container to another in order to prevent air from entering the pump head and possibly causing loss of prime 2 Again turn off the metering pump Lift the foot valve out of the container of water and place it in a container of cleaning solution Turn on the metering pump and let it pump for approximately five 5 minutes or until any scale is dissolved 3 Turn off the metering pump and transfer the foot valve to the container of water Turn the pump on for long enough to flush the cleaning solution from the head and tubing Turn pump off and return the foot valve to the solution tank Reco
22. ssary A spare parts kit SP 281 should be installed as often as necessary at least once every twelve 12 months Assemble valves and head assembly exactly as shown in the exploded view Tighten head screws in a crisscross pattern to 30 in lbs DO NOT OVERTIGHTEN 20 pony Note Jf valves are dirty or not assembled exactly as shown tn the exploded view the pump will not operate 6 3 Changing Liquifram diaphragm 1 Follow steps 1 amp 2 of Cleaning Liquid End Disassembled in Section 6 2 Adjust stroke length knob to 20 by rotating counter clockwise with the pump operating Stop pump by unplugging cord set Grasp outer edge of Liquifram diaphragm with your fingers and rotate counterclockwise until removed Before installing new Liquifram diaphragm be sure disk is properly installed in EPU assembly Install new Liquifram diaphragm by screwing it onto the threaded shaft until it bottoms DO NOT SCRATCH THE SURFACE OF THE NEW LIQUIFRAM diaphragm Set stroke adjustment knob to 100 before reinstalling pump head Tighten four 4 head screws in a crisscross pattern to 30 in lbs DO NOT OVERTIGHTEN 21 6 4 Liquid Handling Assembly LE 281 Exploded oie OG i dead a fe L amp NOT INCLUDED IN D Q0 22 6 5 Liquid Handling Assembly LE 281 Parts List KEY
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