Table of Contents
Advertisement
Quick Links
Advertisement
Table of Contents
Summary of Contents for AWE SPD2H
- Page 1 OWNERS MANUAL MODEL SPD2,3 (H) REVERSE OSMOSIS WATER PURIFICATION SYSTEM INSTALLATION OPERATION MAINTENANCE TROUBLESHOOTING Applied Water Engineering, Inc. 2759 South 300 West Suite G Salt Lake City, UT 84115 USA Phone 801-486-7774 * Fax 801-484-9265 * * awewater.com awewater@xmission.com...
- Page 3 DESCRIPTION The Model SPD2 or SPD3 is a reverse osmosis (RO) type water purification system designed for on line, or demand use, for applications such as the supply of hemodialysis machines. Typically the RO is used with other equipment upstream, such as granular activated carbon filters and a water softener.
- Page 4 The Main Shut Off Valve stops all feed water flow and is closed when the prefilters need to be changed. Normally it is left open. The Prefilter Housings, (not visible in photograph), have replaceable 5 micron rated spun polypropylene filter elements inside for removing sediment from the feed water. The Feed Solenoid Valve opens when the system is operated in normal mode.
- Page 5 Figure 1 FRONT INSIDE VIEW (With Prefilter Sumps Removed) Main Shut Off Filter Vent Valve Valve Pump Vent Valve Annulus Drain Valve Feed Solenoid Valve Product Dump Solenoid Valve Feed Pressure Regulator Filter P Switch Reject Pressure Regulator Capillary Disinfection Check Valve Product Return...
- Page 6 Figure 2 shows the view in the left side "wet" compartment if the control panel cover is removed. Inside we identify: The Feed Pressure Switch A senses the water pressure prior to the feed water solenoid to allow starting of the high pressure pump . The Feed Pressure Switch B senses the water pressure in the pump inlet manifold.
- Page 7 Figure 2 LEFT VIEW INSIDE CONTROL COVER Feed Pressure Pump Torque Block Switch A Feed Pressure Switch B Pump Outlet Pressure Switch Pump Wiring Box Figure 3 Electrical Controls Franklin Pump Control Box Conductivity Monitor Contactor Auxiliary Circuit Board Conductivity Transformer Control Transformer Keyence PLC...
- Page 8 The Control Transformer reduces the incoming 220 volts to a safe 24 volts to operate the level switches, solenoid valves, etc. The Auxiliary Circuit Board rectifies and regulates 24 volts AC into the 24 volts DC needed for the Keyence and its inputs and also mounts an opto-isolator for using the alarm output from the conductivity monitor as an input to the Keyence.
-
Page 9: Control Panel
Figure 4 CONTROL PANEL Low Feed Pressure (Flashes if high pressure) High Conductivity Alarm Horn Prefilter Pressure Drop Mute Button Product Dump Conductivity Monitor Monitor & Alarm Adjustments Monitor Selector Switch Power Switch Pressure Gauges Mode Selection Switch Product Flowmeter Key Switch ... - Page 10 WATER FLOW IN SYSTEM The operation of the system is best studied with the prefilter housings removed and the top cover off. Refer to the attached water flow schematic, Figure 5. Feed water enters the system through a 3/4" MPT bulkhead and passes the main shut off valve before entering the prefilters.
- Page 11 FIGURE 5 SPD Owner's Manual...
- Page 12 INSTALLATION General: The RO system should be located indoors in a location protected from excessive heat, cold, or dust. The system must sit on a level floor and space in front and to both sides should be provided for service. See outline dimensions in Figure 6. Electrical: The system requires a source of grounded 220 volt, 60 Hertz ("H"...
-
Page 13: Initial Start-Up
INITIAL START UP First open the prefilter vent valve. Turn on the feed water to the system and then open the main shut off valve. After a few minutes the air in the prefilter will escape and the vent valve can be shut. Make certain the mode switch is in the "Service &... - Page 14 Chemicals for Disinfection: The recommended disinfectant to use is Renalin or Minncare , both products of Renal Systems, Inc. HDC Medical makes a similar formula with the trade name Peracidin . These are near identical formulations of a mixture of hydrogen peroxide and peracetic acid.
- Page 15 Some amount of disinfectant “rebound” will occur. This is when a disinfectant residual reappears after a period of RO shutdown even though it was not present earlier. Rebound is minimized in the SPD RO due to use of Circserts and the annulus drains, but still exists. This is because of disinfectant trapped in the dead ended tubing to the pressure gauges, or anywhere that was not or cannot be properly rinsed.
- Page 16 Detailed Disinfection Procedure 1) The SPD RO system, the product water distribution loop, and the inlet hoses to the attached dialysis machines are disinfected together. 2) Insert key and turn keylock clockwise. Remove the front cover. With the system running normally in the "Service &...
- Page 17 conductivity (during Service and Rinse) and can be opened and closed manually by pressing the Mute button for 3 seconds. 12) Turn on the connected dialysis machines in a rinse mode. When the tank empties the SPD will shut off. Note the time. 13) Turn off the dialysis machines.
- Page 18 26) Start the RO system by turning the Power switch off and on again. 27) Immediately open the Venturi Valve. 28) Open the Product Dump Valve. 29) Open the Reject to Tank valve for about 10 seconds. The tank will quickly empty with no water returning to it and the system will shut down. 30) Put the Mode switch back in Service position.
-
Page 19: Normal Operation
NORMAL OPERATION Normally the RO system is turned on in the morning, allowed to run all day, and turned off at the end of the day. It should be allowed to operate for 10 minutes after each start up before the water is used for productive purpose. -
Page 20: Monitoring System Operation
cool down for several minutes, turn all the way off and then on again to restart. The Franklin pump electrical power box has an overcurrent thermal sensor that will trip if the pump motor draws excessive current. The button is on the bottom of the box. The overload button is accessible after removing the control panel cover, see Figure 3. - Page 21 maintained by the running capacitor which stays connected to the start winding. Instructions for testing the items in the box are enclosed inside. Note: the running capacitance has been changed from the 10 F supplied by Franklin to 20 F. This improves the power factor and efficiency of the motor and reduces noise.
- Page 22 FIGURE 7 SPD Owner’s Manual...
-
Page 23: Monitor Adjustment
The inside of the sump should be rinsed thoroughly when the element is changed. Replace the element with a 20" long cartridge rated at 5 microns or less. The AWE part number of the element required is F94B2, which is a 5 micron rated spun polypropylene type. -
Page 24: Chemical Cleaning
The other two potentiometers are marked feed and product and are used to calibrate the conductivity probes to a sample checked with a hand held instrument. Any films that coat the electrodes can cause measurement error. The electrodes in the feed conductivity probe especially can become coated and cause some drift in reading. - Page 25 the RO elements be replaced. The old AAMI-ANSI dialysis standard recommends that elements be replaced when the salt passage (1 - rejection %) doubles in value. Since typically the rejection of thin film composite RO membranes when new is 98%, this means replacing the elements at 96% rejection. Actually the minimum level of rejection needed to meet AAMI ionic contamination limits is dependent upon the chemical analysis of the treated feed water to the RO system.
- Page 26 chevron type rubber brine seal. The end cap itself seals to the vessel body with a large "O" ring. The "O" rings in each end cap should be examined or replaced when the elements are changed. The old "O" rings can be removed by sticking a sharp pin or needle underneath the ring and pulling the "O" ring inward and out.
- Page 27 Instant fittings seal to the tube with an "O" ring inside the fitting. The tube must be fully pushed into the fitting for the seal to be made. If a leak persists, the "O" ring in the fitting or the scratched tubing segment may need replacing.
- Page 28 Figure 8 Remove right side angle bracket so torque clamp Torque rod assembly can be unscrews from aluminum clamp. Compression Nut to Disconnect Pump Outlet Loosen bolt on torque clamp Pump wiring box and compression nut seal to pump housing Disassembly of Pump Casing: Remove the 3/4"...
- Page 29 the large "O" ring that seals the two parts of the pump casing that clamp together. Disassembly of Submersible Pump-motor Assembly: The motor has four studs onto which the pump is held with four nuts and washers. Undo these 1/2" hex nuts with a box end wrench. The pump can then be pulled off the motor.
- Page 30 Replacement pumps and/or motors may not have the same overall lengths as that used in the original assembly. A difference in lengths can be adjusted by shortening or lengthening the 2” PVC pipe piece located in the bottom of the pump housing. Before installing a replacement motor or pump, compare the overall length of the bolted assembly compared to that of the existing pump motor assembly.
-
Page 31: Troubleshooting
TROUBLESHOOTING Symptom: Nothing works - apparent no power. If there is power to the system and the circuit breaker/power switch is energized, there should be a glow in the neon light of this switch. Over several years this light will glow more dimly and then flicker. If no sign of light is present from the switch, check for source power interruption. - Page 32 Feed Conductivity - Product Conductivity Rejection (%) = Feed Conductivity Since the system conductivity monitor displays the two in a 10 to 1 ratio, the approximate rejection is available at a glance. If the needle on the meter does not move when the display is shifted from feed to product it indicates the rejection is 90%.
- Page 33 SPD Owner's Manual...
-
Page 34: Plc Inputs
PLC INPUTS Input Description On Condition Contact # Pretreatment Interlok Mode Selection Normal Feed Pressure Switch A Above level Feed Pressure switch B Above Level Pump outlet pres. switch below limit Filter DP switch Above limit High conductivity Above limit Disinfection Tank fill PB Momentary Disinfection tank high... - Page 35 Appendix 1 Keyence Ladder Program SPD Owner's Manual...
- Page 36 SPD Owner’s Manual...
- Page 37 SPD Owner's Manual...
- Page 38 SPD Owner’s Manual...
Need help?
Do you have a question about the SPD2H and is the answer not in the manual?
Questions and answers