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METERED 1-1/2" NXT2 SERIES
COMMERCIAL WATER CONDITIONER
INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
COMPLETE FOR FUTURE REFERENCE:
MODEL NO:
SERIAL NO:
DATE INSTALLED:
DEALER:
8-640
MGT 45M–450M
SYSTEM 4 – SINGLE
Standard Image
Equipment appearance may differ.

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Summary of Contents for MARLO NXT2 Series

  • Page 1 MGT 45M–450M SYSTEM 4 – SINGLE METERED 1-1/2” NXT2 SERIES Standard Image Equipment appearance may differ. COMMERCIAL WATER CONDITIONER INSTALLATION, OPERATION, AND MAINTENANCE MANUAL COMPLETE FOR FUTURE REFERENCE: MODEL NO: SERIAL NO: DATE INSTALLED: DEALER: 8-640...
  • Page 2 MGT 45M – 450M 1-1/2” SINGLE NXT2 AFTER PRIOR TO Inspection Requirement Media Loading Media Loading Prior to Loading Media 1. Inspect condition of upper distributor piping. Verify fittings are tight and positioned as shown. 2. Inspect condition of strainers, laterals and hub through top or side access ports.
  • Page 3: Table Of Contents

    MGT 45M – 450M 1-1/2” SINGLE NXT2 TABLE OF CONTENTS SYSTEM INFORMATION Product Warranty ................................1 General Arrangement Drawing .............................2 Dimension Chart ................................3 Specification Chart ...............................4 INSTALLATION General Information ...............................5 Loading Softener ................................6 Mounting Control Valve ..............................6 Brine Tank Installation ..............................7 Mounting The Water Meter Assembly..........................8 Power Supply Installation ..............................9 OPERATION...
  • Page 4: System Information

    MGT 45M – 450M 1-1/2” SINGLE NXT2 SYSTEM INFORMATION COMMERCIAL AND INDUSTRIAL PRODUCT WARRANTY Manufacturer warrants all water treatment products manufactured and/or distributed by it to be free from defects in materials and workmanship for a period of one (1) year from installation or 18 months from the date of shipment whichever comes first.
  • Page 5: General Arrangement Drawing

    MGT 45M – 450M 1-1/2” SINGLE NXT2 SYSTEM INFORMATION...
  • Page 6: Dimension Chart

    MGT 45M – 450M 1-1/2” SINGLE NXT2 SYSTEM INFORMATION DIMENSION CHART TANK SIZE INLET SIZE LENGTH WIDTH HEIGHT* MODEL SOFTENER BRINE (Inches) (Inches) (Inches) (Inches) (Inches) (Inches) 13x54 18x40 13x54 18x40 14x65 18x40 16x65 24x40 18x65 24x50 21x62 24x50 24x72 24x50 24x72 24x50...
  • Page 7: Specification Chart

    MGT 45M – 450M 1-1/2” SINGLE NXT2 SYSTEM INFORMATION SPECIFICATION CHART MODEL VALVE SIZE (IN) 1-½ 1-½ 1-½ 1-½ 1-½ 1-½ 1-½ 1-½ 1-½ 1-½ MAX CAPACITY (KILOGRAINS) MIN CAPACITY (KILOGRAINS) CONTINUOUS FLOWRATE (GPM) PEAK FLOWRATE (GPM) BACKWASH & FAST FLUSH (GPM) BRINE DRAW &...
  • Page 8: Installation

    MGT 45M – 450M 1-1/2” SINGLE NXT2 INSTALLATION INSTALLATION INSTRUCTIONS WATER SOFTENERS GENERAL INFORMATION 1. Operating pressure range is 25-100 psi. If pressures over 100 psi are encountered, a regulator must be installed. Note: The control valve will not operate correctly if feeding into an atmospheric tank. A pressure control device must be added to the outlet to maintain the minimum pressure.
  • Page 9: Loading Softener

    MGT 45M – 450M 1-1/2” SINGLE NXT2 INSTALLATION LOAD SOFTENER TANK IMPORTANT: Be sure to visually inspect the lower laterals prior to loading the media. Check to make sure each lateral is firmly threaded into the hub. 1. On Model MGT - 45 and 60 the softening media has been pre-loaded at the factory.
  • Page 10: Brine Tank Installation

    MGT 45M – 450M 1-1/2” SINGLE NXT2 INSTALLATION BRINE TANK INSTALLATION The brine tank should be installed on a smooth level surface. If none is available, the tank should be placed on a smooth piece of exterior plywood and leveled by placing shims underneath the plywood. Make sure that the salt shelf inside the tank is level and that the brine well is near to vertical as possible.
  • Page 11: Mounting The Water Meter Assembly

    MGT 45M – 450M 1-1/2” SINGLE NXT2 INSTALLATION MOUNTING WATER METER ASSEMBLY (IF UNIT IS NOT SKID MOUNTED) 1. Locate the meter. The meter may or many not have the cable attached. If not, locate the cable as well. 2. For a twin alternating system, the meter must be installed in the common outlet of the softeners. Refer to the Gen- eral Arrangement drawing on page two (2).
  • Page 12: Power Supply Installation

    MGT 45M – 450M 1-1/2” SINGLE NXT2 OPERATION POWER SUPPLY INSTALLATION NOTE: POWER SUPPLY INCLUDES A HARNESS WITH 2 BLACK WIRES THAT CONNECT TO THE CIRCUIT BOARD. 1. Insert black and black transformer wires into 24VDC input of control. 2510/2750/2815/2850/2900 Valves: Communication Cables Hinge Mount: mount per valve model noted Wire Harness...
  • Page 13: Timer Display Features

    MGT 45M – 450M 1-1/2” SINGLE NXT2 OPERATION TIMER DISPLAY FEATURES System Network Status Master Valve Flow Time Number Indicator State Indicator LEDs Indicator of Day Display Screen Blue LED Alternates between On - Unit in Service Date, Flow Rate, and Blinking - Regeneration Queued Volume Remaining (If a regeneration is...
  • Page 14: Timer Operation

    MGT 45M – 450M 1-1/2” SINGLE NXT2 OPERATION SYSTEM OPERATION System 4 Single Unit Single Tank configuration Time Clock: No Meter Immediate: One Meter Delayed: One Meter Remote Signal Start TIMER OPERATION TIMER OPERATION DURING PROGRAMMING The timer enters the Program Mode in standby or service mode as long as it is not in regeneration. While in the Program Mode the timer continues to operate normally monitoring water usage.
  • Page 15 MGT 45M – 450M 1-1/2” SINGLE NXT2 OPERATION TIMER OPERATION SETTING THE TIME OF DAY NOTE: Set Time of Day on any unit and the rest of the units in the system will update the Time of Day automatically. 1. Press and hold the Up button for 2 seconds. The “Time” value is displayed. Press the Up or Down buttons to adjust as desired. 2.
  • Page 16: Start-Up Procedures

    MGT 45M – 450M 1-1/2” SINGLE NXT2 OPERATION START-UP PROCEDURES Again, make sure all plumbing is complete and tight, including drain line and brine line. Make sure all electrical components, including the communication cables (multi tank systems only) are properly installed and connected. 1.
  • Page 17: User Programming Flow Chart

    MGT 45M – 450M 1-1/2” SINGLE NXT2 OPERATION USER MODE PROGRAMMING FLOW CHART 1. To navigate, press the Extra Cycle button to advance to the next value. Press the Left button to retreat to the previous value. 2. Where applicable, use the Up and Down buttons to adjust a value as desired. 3.
  • Page 18: Batch Size Calculations

    MGT 45M – 450M 1-1/2” SINGLE NXT2 OPERATION BATCH SIZE CALCULATION Batch size is the term used for the amount of water being softened by the water softener between regenerations. The NXT2 controller calculates this value automatically based on the values in the program. This is a simple calculation provided two pieces of information are known: Capacity of the water softener in grains (gr.) (i.e.
  • Page 19: Diagnostic Flow Chart

    MGT 45M – 450M 1-1/2” SINGLE NXT2 OPERATION DIAGNOSTIC MODE FLOW CHART Entering Diagnostic Mode: 1. Press and hold the Left button to enter Diagnostic Programming mode. Example: ERROR LOG 2. To navigate, press the Extra Cycle button to advance to the next ERROR LOG EMPTY Record of error events chronologically.
  • Page 20: Master Programming Flow Chart

    MGT 45M – 450M 1-1/2” SINGLE NXT2 OPERATION MASTER PROGRAMMING MODE FLOW CHART NOTE: Depending on current option settings, some displays cannot be viewed or set. Master Programming Mode: 1. Press and hold the Left and Down buttons simultaneously for 3 seconds to enter Master Programming mode.
  • Page 21 MGT 45M – 450M 1-1/2” SINGLE NXT2 OPERATION MASTER PROGRAMMING MODE FLOW CHART Example: LOCK WINDOW #1 Start Lock Window End Lock Window BACKWASH Example: 10 M Range: 0 - 240 M DRAW Example: 60 M Range: 0 - 240 M RAPID RINSE Example: 10 M...
  • Page 22: Master Programming Steps

    MGT 45M – 450M 1-1/2” SINGLE NXT2 OPERATION MASTER PROGRAMMING STEPS - SINGLE (SYSTEM 4) 2850...
  • Page 23: Flow Diagrams

    MGT 45M – 450M 1-1/2” SINGLE NXT2 OPERATION FLOW DIAGRAMS 1. SERVICE POSITION Hard water enters unit at valve inlet and flows down through the mineral in the min- eral tank. Conditioned water enters center tube through the bottom distributor, then flows up through the center tube, around the piston, and out the outlet of the valve.
  • Page 24 MGT 45M – 450M 1-1/2” SINGLE NXT2 OPERATION FLOW DIAGRAMS 1. SLOW RINSE POSITION Hard water enters unit at valve inlet, flows up into injector housing and down through nozzle and throat, around the piston, down through mineral, enters center tube through bottom distributor, flows up through center tube, around piston and out through drain line.
  • Page 25: Maintenance

    MGT 45M – 450M 1-1/2” SINGLE NXT2 MAINTENANCE NXT2 WIRING DIAGRAM FLOW METER (FM) WIRING GROUND ( - ) POWER ( + ) SIGNAL FLECK BLACK GREEN SIGNET SHIELD BLACK CLACK BLACK WHITE AUTOTROL CLEAR BLACK...
  • Page 26: Powerhead Assembly

    MGT 45M – 450M 1-1/2” SINGLE NXT2 MAINTENANCE 2850 POWERHEAD ASSEMBLY 14 17...
  • Page 27 MGT 45M – 450M 1-1/2” SINGLE NXT2 MAINTENANCE 2850 POWERHEAD PARTS LIST Item No. Part No. Description Item No. Part No. Description 1....1 ..18697-15 ....Backplate, Hinged 40 ....1 ..42580 ....Motor, Drive, 24V, 50/6 0Hz, Sp 2....1 ..60219-02 ....Cover Assy, Environmental, Black 41 ....1 ..
  • Page 28: Nxt2 Timer Assembly

    MGT 45M – 450M 1-1/2” SINGLE NXT2 MAINTENANCE NXT2 TIMER ASSEMBLY (2510, 2750, 2850, 2900, 3150 & 3900 VALVES) Item No. Part No. Description 1 ......1 .....62115 .....Timer Assy, NXT2 Service Assemblies 2 ......1 ....62120 .....Control Panel Assy, NXT2, Programmed 3 ......1......40941 .....Wire Harness, Upper Drive...
  • Page 29: Control Valve Assembly

    MGT 45M – 450M 1-1/2” SINGLE NXT2 MAINTENANCE 2850 CONTROL VALVE WITH 1700 INJECTOR ASSEMBLY OPTIONAL...
  • Page 30 MGT 45M – 450M 1-1/2” SINGLE NXT2 MAINTENANCE 2850 CONTROL VALVE WITH 1700 INJECTOR ASSEMBLY PARTS LIST Item No. Part No. Description Item No. Part No. Description ..60129-30 ..Seal and Spacer Kit 2850, 1 ....1 ..16250-01 ..Valve Body, 2850, Machd Plastic Spacers, 559 PE 2 ....
  • Page 31: Brine Injector Assemblies

    MGT 45M – 450M 1-1/2” SINGLE NXT2 MAINTENANCE 1600 SERIES BRINE SYSTEM 60029 Rev C Item No. Part No. Description Item No. Part No. Description 1 ..60020-50 ..BLFC, .50 GPM, 1600 1 ....2 ..10332 ....Fitting, Insert, 3/8 1 ..
  • Page 32 MGT 45M – 450M 1-1/2” SINGLE NXT2 MAINTENANCE 1600 SERIES BRINE SYSTEM (continued) Item No. Part No. Description Item No. Part No. Description Steel ..10225-1 ..Nozzle, Injector, #1, 25 ..... 60480-01 ..Injector Assy, 1600, #1 Plastic Stainless Steel ..60480-02 ..Injector Assy, 1600, #2 Plastic ..
  • Page 33 MGT 45M – 450M 1-1/2” SINGLE NXT2 MAINTENANCE 1700 BRINE SYSTEM ASSEMBLY...
  • Page 34 MGT 45M – 450M 1-1/2” SINGLE NXT2 MAINTENANCE 1700 BRINE SYSTEM ASSEMBLY PARTS LIST Item No. Part No. Description Item No. Part No. Description 27 ....2 ..14804 ....Screw, Hex Hd Mach, 10 - 24 1 ....1 ..14792 ....Plug, End, Brine Valve x 2-3/4-inch 18-8 Stainless 2 ....
  • Page 35: Meters And Flow Sensors

    MGT 45M – 450M 1-1/2” SINGLE NXT2 MAINTENANCE PLASTIC METER ASSEMBLY Item No. Part No. Description Item No. Part No. Description 1 ....1 ..17542 ....Flow Straightener, 1-1/2" 20 ......61560 ....Meter Assy, 1-1/2" INLN, ELEC, PLAS, w/o Nipples, TURB 2 ....2 ..40576 ....Clip, H, Plastic, 7000 ..
  • Page 36 MGT 45M – 450M 1-1/2” SINGLE NXT2 MAINTENANCE 1-1/2 INCH STAINLESS STEEL METER ASSEMBLY Not Shown (optional) Item No. Part No. Description 1 ..62072 ....Meter Sleeve, 1....1 ..62049-01 ....Service Kit, 1-1/2 inch to 1 inch (optional) 1 inch & 1-1/2 inch Meter, Standard Range 1 ..
  • Page 37 MGT 45M – 450M 1-1/2” SINGLE NXT2 MAINTENANCE CLACK 1-1/2” TURBINE METER V3040-15 WS2 1-1/2” Meter NPT Assembly Typical meter retaining clip installation. Ensure clip is fully engaged in groove and tabs positioned in slot as shown. B indicates BSPT N indicates NPT Drawing Part...
  • Page 38 MGT 45M – 450M 1-1/2” SINGLE NXT2 MAINTENANCE 2536 STANDARD MOUNT SENSOR Galvanized Iron Threaded Tee with NPT Threads PVDF Insert Iron Strap-on Saddle with PVDF Insert K-FACTOR TABLE - SIGNET 2536 (Pulses per Gallon) GENERIC FLOW METER SETTINGS PIPE SIZE SADDLE (inches)
  • Page 39: Brine Tank Assemblies

    MGT 45M – 450M 1-1/2” SINGLE NXT2 MAINTENANCE BRINE SYSTEM - MGT 45M-90M TUBING KIT Item Description Part Number Number Brine Tank 18”x40”/Black Molded Cover - MGT 45 - 90M A2042028 Brine Valve Assembly 474 w/ Aircheck - MGT 45M-90M B1179005 5”...
  • Page 40 MGT 45M – 450M 1-1/2” SINGLE NXT2 MAINTENANCE BRINE SYSTEM - MGT 120M-300M Item Description Part Number Number Brine Tank 24” x 41” w/ Holes - MGT 120M B1002039 Brine Tank 24”x50” w/ Holes - MGT 150M-300M B1002016 24” Diameter 5BW Plastic Grid Plate A2284007 Brine Valve (474) for MGT 120 B1180014...
  • Page 41 MGT 45M – 450M 1-1/2” SINGLE NXT2 MAINTENANCE BRINE SYSTEM - MGT 450M Item Description Part Number Number Brine Tank 30” x 50” w/ Holes - MGT 450M B1002041 5” x 48” Drilled Brine Well B1015005 Brine Valve Assembly 16-1/4” x 24” B1042007 5”...
  • Page 42: Service Assemblies

    MGT 45M – 450M 1-1/2” SINGLE NXT2 MAINTENANCE SERVICE ASSEMBLIES (60105) (60129) A2475002 Stuffer Assy, 2850/9500 (16516) A2474002 Puller Tool Assy, 2850/9500 (17623) A2423002 Silicone 2.4 oz. Tube (16174)
  • Page 43: Troubleshooting

    MGT 45M – 450M 1-1/2” SINGLE NXT2 MAINTENANCE TROUBLESHOOTING DETECTED ERRORS NOTE: It can take up to 30 seconds for an error to be detected and displayed. All errors on each timer in the system must be displayed before the errors can be corrected. If a communication error is detected, an Error Screen will appear.
  • Page 44 MGT 45M – 450M 1-1/2” SINGLE NXT2 MAINTENANCE TROUBLESHOOTING 2900 VALVE PROBLEM CAUSE CORRECTION Softener Fails To Regenerate. A. Electrical Service To Unit Has A. Assure Permanent Electrical Ser- Been Interrupted. vice (Check Fuse, Plug, Pull Chain or Switch). B. Timer Is Defective. B.
  • Page 45 MGT 45M – 450M 1-1/2” SINGLE NXT2 MAINTENANCE TROUBLESHOOTING 2900 VALVE (CONTINUED) PROBLEM CAUSE CORRECTION 7. Excessive Water In Brine Tank. A. Plugged Drain Line Flow Control. A. Clean Flow Control. B. Plugged Injector System. B. Clean Injector and Screen. C.
  • Page 46 MGT 45M – 450M 1-1/2” SINGLE NXT2 NOTES...
  • Page 47 MGT 45M – 450M 1-1/2” SINGLE NXT2 NOTES...
  • Page 48 8-640...

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