Watts Industries WM100SM Operating Manual
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Contents
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CONTENTSThe plug and/or injector can be pried out with a smallscrewdriver. The plug can be wiped clean. If the plug leaksreplace the entire plug. The injector consists of a throat and anozzle. Chemically clean the injector with vinegar or sodiumbisulfite. The holes can be blown out with air. Both pieces havesmall diameter holes that control the flow rates of water to insurethat the proper concentration of regenerant is used. Sharpobjects, which can score the plastic, should not be used to cleanthe injector. Scoring the injector or increasing the diameter of thehole could change the operating parameters of the injector.Two holes are labeled DN and UP. Check for compliance withone of the following:a. For downflow systems, the appropriate size injector islocated in the “DN” hole, a plug is in the “UP” hole andthe piston is a combination of the downflow main piston andthe regenerant piston;b. For upflow systems, the appropriate size injector is locatedin the “UP” hole, a plug is in the “DN” hole and the pistonis a combination of the upflow main piston and the regenerantpiston; orc. For backwash only systems, a plug is in the “DN” hole andin the “UP” hole, and the piston only has a downflowmain piston (the regenerant piston must be removed) and aplug is in the refill flow control position.Push the plug(s) and/or injectors firmly in place, replace thescreen and hand tighten the injector cap.REFILL FLOW CONTROL ASSEMBLYOR REFILL PORT PLUGTo clean or replace the refill flow control, pull out the elbow-locking clip and then pull straight up on the elbow. Replace theelbow-locking clip in the slot so that it is not misplaced. Twist toremove the white flow control retainer. The flow control can beremoved by prying upward through the side slots of the retainerwith a small blade flat screwdriver.Chemically clean the flow control or the white flow controlretainer using dilute sodium bisulfite or vinegar. Do not use awire brush. If necessary, replace the flow control o-ring onthe flow control retainer, or the o-ring on the elbow.Reseat the flow control so the rounded end is visible in the flowcontrol. Reseat the white flow control retainer by pushing theretainer into the elbow until the o-ring seats. Remove locking clip,push down on elbow to reseat and insert locking clip.Do not use Vaseline, oils, or other unacceptable lubricants ono-rings. A silicon lubricant may be used on the o-ring on elbow orthe white retainer.WATER METER OR METER PLUGThe water meter assembly is connected to the PC board by awire. If the entire water meter assembly is to be replaced, removethe control valve cover and remove the power source and watermeter plugs from the PC board. Unlatch the drive assembly andlean it forward. Unthread the water meter wire from the side of thedrive assembly and through the drive back plate. To reinstall,rethread the water meter wire through the drive back plate andthe side of the drive assembly. Reattach the drive assemblyand the water meter and power plugs.If no water meter wire is visible, then a plug is installed not awater meter.The water meter wire does not need to be removed from the PCboard if the water meter is only being inspected and cleaned.To remove the water meter assembly, unscrew the meter cap onthe left side of the control valve. Pliers may be used to unscrewthe nut if necessary.With the nut removed, a slot at the top of the water meter isvisible. Twist a flat blade screwdriver in the slot between thecontrol valve body and the meter. When the meter is part wayout it is easy to remove the water meter from the housing.Once the water meter is removed from the control valve body,use your fingers to gently pull forward on the turbine to removeit from the shaft.Do not use a wire brush to clean. Wipe with a clean cloth orchemically clean in dilute sodium bisulfite or vinegar. The turbinecan be immersed in the chemical. Do not immerse electronics. Ifthe turbine is scored or damaged or the bearings on the turbineare worn replace the turbine.Do not lubricate the turbine shaft. The turbine shaft bearings arepre-lubricated. Do not use Vaseline, oils or other unacceptablelubricants on the o-ring. A silicon lubricant may be used on theblack o-ring.Snap the turbine on the shaft and reinsert the water meter intothe side slot. Hand tighten the nut. Do not use a pipe wrench totighten nut.BYPASS VALVEThe working parts of the bypass valve are the rotor assembliesthat are contained under the bypass valve caps. Before workingon the rotors, make sure the system is depressurized. Turn thered arrow shaped handles towards the center of the bypass valveand back to the arrow direction several times to ensure rotor isturning freely.The nuts and caps are designed to be unscrewed or tightenedby hand. If necessary a pair of pliers can be used to unscrew thenut or cap. Do not use a pipe wrench to tighten or loosen nuts orcaps. Do not place screwdriver in slots on caps and/or tap with ahammer. To access the rotor, unscrew the cap and lift the cap,rotor and handle out as one unit. Twisting the unit as you pull itout will help to remove it more easily. There are three o-rings: oneunder the rotor cap, one on the rotor stem and the rotor seal.Replace worn o-rings. Clean rotor. Reinstall rotor.When reinstalling the red arrow handles be sure that:1. O-rings on both rotors face to the right when being viewedfrom the front of the control valve when the handle pointersare lined up with the control valve body arrows; or2. Arrows point toward each other in the bypass position.Since the handles can be pulled off, they could be accidentallyreinstalled 180° from their correct orientation. To install the redarrow handles correctly, keep the handles pointed in the samedirection as the arrows engraved on the control valve body whiletightening the bypass valve caps.After completing, any valve maintenance, press and hold NEXTand REGEN buttons for 3 seconds or unplug power source jack(black wire) and plug back in. This resets the electronics andestablishes the service piston position. The display should flashall wording then flash the software version (e.g. 154) and thenreset the valve to the service position.17 |
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