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[Page 1] 3M MCWS075ME
IN313 0706 INSTALLATION AND OPERATING INSTRUCTIONS MCWS/CWS SERIES RESIDENTIAL WATER SOFTENER TWO TANK MODELS: MCWS075ME CWS075ME MCWS100ME CWS100ME MCWS150ME CWS150ME MCWS200ME CWS200ME MCWS300ME CWS300ME a 3M company CUNO Incorporated 12628 US 33...
[Page 2] 3M MCWS075ME
CAUTION SAFETY INFORMATION Intended Use: The CUNO MCWS/CWS Series Residential Water Softener is intended for use in softening water in homes and has not been evaluated for other uses. The system must be installed indoors near the point of entry of ...
[Page 3] 3M MCWS075ME
NOTE: Hydrogen sulfide (H 2 S) must be tested for at the well site. For accuracy, the sample must be drawn with the pump RUNNING, and the test be completed within ONE minute after the sample is drawn. NOTE: Softeners are designed to reduce hardness ...
[Page 4] 3M MCWS075ME
CHECK YOUR WATER PRESSURE AND PUMPING RATE: Two water system conditions must be checked carefully to avoid unsatisfactory operation or equipment damage: 1) MINIMUM water pressure required at the water softener inlet is 20 psi (138 kPa). IF PRESSURE...
[Page 5] 3M MCWS075ME
TREATED WATER TANK SWITCH. PRESSURE PRESSURE WATER RAW METER WATER FOR LAWN SPRINKLERS OR OTHER HIGH DEMAND HIGH DEMAND OR OTHER LAWN SPRINKLERS WATER FOR PRESSURE SWITCH. WELL WATER RAW BRINE TANK SOFTENER FILTER PRIMARY PRESSURE SWITCH. SECONDARY S...
[Page 6] 3M MCWS075ME
SECTION 2: INSTALLATION Figure 2. SOFTENER AND BRINE TANK ASSEMBLY, TOP VIEW 2-2 Step 1. Remove the unit from the shipping box and remove all packaging. Ensure no freight damage has occurred since shipment from our manufacturing facility. ...
[Page 7] 3M MCWS075ME
Step 10. Install OVERFLOW LINE to brine tank OVER- FLOW FITTING (Figure 2). Discharge of line must be lower than OVERFLOW FITTING. DO NOT INTERCONNECT OVERFLOW LINE WITH VALVE DRAIN LINE. Step 11. Make certain BYPASS VALVE INLET and OUT- LET KNOBS A...
[Page 8] 3M MCWS075ME
2-4 Step 15. Refer to SECTION 3, as how to set control valve for the correct time of day. When shifting to daylight saving time and (back), you may wish to adjust TIME OF DAY accordingly. NOTE: TIME OF REGENERATION is preset for 2:00 a.m. be...
[Page 9] 3M MCWS075ME
SECTION 3: CONTROL VALVE PROGRAMMING AND REGENERATION Press NEXT and simultaneously for 3 seconds. Hardness: Set the amount of hardness in grains of hardness as calcium carbonate per gallon using the or buttons. The default ...
[Page 10] 3M MCWS075ME
that day. Continue to press the button to show the maximum number of gallons treated for the last 63 days. This display will show dashes if a water meter is not installed. Press the NEXT button at any time. Press REGEN to return to previous ...
[Page 11] 3M MCWS075ME
Valve History RETURN TO NORMAL MODE Press and simultaneously for three seconds and release. Then press and simultaneously and release. If screen, to the left, does not appear is 5 seconds the lock on the valve is activated. To unl...
[Page 12] 3M MCWS075ME
General Operation When the system is operating, one of two displays will be shown. Pressing NEXT will alternate between the displays. One of the displays is always the cur- rent time of day. The second display is one of the following: days remaining...
[Page 13] 3M MCWS075ME
REPLENISHMENT OF SALT SUPPLY: The salt storage capacity of the brine tank is approximately 180 lbs (82 kg). During each regeneration a specific amount of salt is consumed, thus requiring its periodic replenish- ment (the frequency and salt dosage ...
[Page 14] 3M MCWS075ME
5-1 noituloSesuaCelbissoPmelborP 1. Timer does not display time of day a. AC Adapter unplugged a. Connect power b. No electric power at outlet b. Repair outlet or use working outlet c. Defective AC Adapter c. Replace AC Adapter d. Defective PC bo...
[Page 15] 3M MCWS075ME
5-2 SolutionPossible CauseProblem 6. Control valve stalled in regeneration 7. Control valve does not regenerate automatically when “REGEN” button is depressed and held 8. Control valve does not re- generate automatically but does when “REGE...
[Page 16] 3M MCWS075ME
Drive Assembly Remove the valve cover to access the drive assembly. WARNING: Disconnect the power source plug (black wire) from the PC board prior to disconnecting the motor or water meter plugs from the PC board. The power source plug connects to...
[Page 17] 3M MCWS075ME
Figure 7 5-4 Drive Cap Assembly, Main Piston and Regenerant Piston The drive assembly must be removed to access the drive cap assembly. The drive cap assembly must be removed to access the piston(s). The drive cap assembly is threaded into the con...
[Page 18] 3M MCWS075ME
5H¿OO)ORZ&RQWURO$VVHPEO\RU5H¿OO3RUW3OXJ TRFOHDQRUUHSODFHWKHUH¿OOÀRZFRQWUROSXOORXWWKHHOERZORFNLQJFOLSDQGWKHQSXOOVWUDLJKWXSRQWKHHOERZ. Replace WKHHOERZ�...
[Page 19] 3M MCWS075ME
SECTION 5: SYSTEM TROUBLESHOOTING GUIDE 5-5 CAUSE A. Electrical service to unit interrupted. B. Time improperly set. C. Safety brine valve not opening. D. Salt "bridged" in brine tank. A. Bypass open. B. Valve programming incorrect. C. No ...
[Page 20] 3M MCWS075ME
6-1 SECTION 6: SPECIFICATIONS AND OPERATING DATA ITEM CWS075ME CWS100ME CWS150ME CWS200ME CWS300ME MCWS075ME MCWS100ME MCMW150ME MCWS200ME MCWS300ME Nominal Media Volume, Ft 3 0.75 1.0 1.5 2.0 3.0 .sbL,egasoDtlaS 8121966gnitteSyro...
[Page 21] 3M MCWS075ME
SECTION 7: PARTS COMPONENT PARTS LIST 1 7 6 3 9 8 5 OFF OFF OFF OFF 2 16 17 18 19 12 14 15 13 10 11 7-1 DESCRIPTIONREF NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 CWS075ME MCWS0751M CWS100ME MCWS1001M CWS150ME MCWS1501M CWS200ME MCWS2001M CWS...
[Page 22] 3M MCWS075ME
Front Cover and Drive Assembly * Drawing number parts 2 through 6 may be purchased as a complete assembly, part V3002. Drawing No. Order No. Description 1AssemblyrevoCtnorF10-5713V1 1rotoM10-7013V2 3 V3106-01 Drive Bracket&Spring Clip ...
[Page 23] 3M MCWS075ME
2 4b 6 5 1 7 3 8 4 Drive Cap Assembly'RZQÀRZ3LVWRQ 5HJHQHUDQW3LVWRQDQG6SDFHr6WDFN Assembly Drawing No. Order No. Description Quantity 1 V3005 Spacer Stack Assembly 1 1 1 1 p Assemb...
[Page 24] 3M MCWS075ME
Injector Cap, Injector Screen, Injector, Plug and O-Ring *The injector plug and the injector each contain one 011 (lower) and 013 (upper) o-ring. Drawing No. Order No. Description 1paCrotcejnI6713V1 1531gnir-O2513V2 1 1 neercSrotcejnI7713V3 4 V3010-1...
[Page 25] 3M MCWS075ME
Refill Flow Control Assembly Water Flow Proper BLFC orientation directs refill water flow towards the washer face with rounded edge and text. ytitnauQnoitpircseD.oNredrO.oNgniwarD 1pilCgnikcoLwoblE5164H 2 1 1”8/3tresniebutyloP6-P-PCJ 3 1”8/3t...
[Page 26] 3M MCWS075ME
Drain Line – 3/4” Water Flow Proper DLFC orientation directs water flow towards the washer face with rounded edge. Drawing No. Order No. Description Quantity 15164H1 Polytube insert 5/8 PKP10TS8-BULK 2 3 V3192 Nut ¾ Drain Elbow 4 V3158...
[Page 27] 3M MCWS075ME
Water Meter and Meter Plug Drawing No. Order No Description 1CQ”1tuN1513V1 1Meter Assembly (includes drawing #3 & #4)3003V2 1enibruT10-8113V3 1512gnir-05013V4 1Meter Plug Assembly10-3003V5 3 4 5 1 2 7-7 SECTION 7: PARTS COMPONENT PARTS LIST Qua...
[Page 28] 3M MCWS075ME
1 2 4 3 1 2 4 3 Order No: V3007-02 Description: Fitting 1” Brass Sweat Assembly Drawing No. Order No. Description 1 V3151 Nut 1” Quick Connect 2 2 Split Ring0513V2 2 2 512gniR-O5013V3 4 V3188 Fitting 1” Brass Sweat Assembly 7-8 SECTION 7: PA...
[Page 29] 3M MCWS075ME
Bypass Valve 6 5 6 5 4 1 4 1 1 2 3 3 1 2 Drawing No. Order No. 1 Nut 1” Quick Connect 2 2Split Ring Split Ring 0513V2 2512gniR-O5013V3 2Bypass 1” Rotor Bypass Cap Bypass Handle 5413V4 26413V5 27413V6 7 ...
[Page 30] 3M MCWS075ME
Wrench (Order No. V3193-01) Although no tools are necessary to assemble or disassemble the valve, the wrench (shown in various positions on the valve) may be purchased to aid in assembly or disassembly. 7-10 SECTION 7: PARTS COMPONENT PARTS LIST ...
[Page 31] 3M MCWS075ME
U.S. Patents 6379630, 5951855, 5699930 and 5584411 Please read and complete the following limited warranty and mail the bottom half within 10 days of purchase CUNO Incorporated warrants to the original purchaser-consumer of its Product that it is fre...
[Page 32] 3M MCWS075ME
CUNO, Aqua-Pure and MacCLEAN are trademarks of 3M Company used under license. © 2006 3M Company. All rights reserved. ...
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