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MARLO NXT2 Series Installation, Operation And Maintenance Manual

System 7 - twin alternating 3”, commercial water conditioner
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MGT 240M–1200M
SYSTEM 7 – TWIN ALTERNATING
COMMERCIAL WATER CONDITIONER
INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
COMPLETE FOR FUTURE REFERENCE:
MODEL NO:
SERIAL NO:
DATE INSTALLED:
DEALER:
8-634
3" NXT2 SERIES
Standard Image
Equipment appearance may differ.
Twin system shown with skid mount option.

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  • Page 1 MGT 240M–1200M SYSTEM 7 – TWIN ALTERNATING 3” NXT2 SERIES Standard Image Equipment appearance may differ. Twin system shown with skid mount option. COMMERCIAL WATER CONDITIONER INSTALLATION, OPERATION, AND MAINTENANCE MANUAL COMPLETE FOR FUTURE REFERENCE: MODEL NO: SERIAL NO: DATE INSTALLED:...
  • Page 2 MGT 240M–1200M NXT2 3” TWIN ALTERNATING 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 240M–1200M NXT2 3” TWIN ALTERNATING TABLE OF CONTENTS SYSTEM INFORMATION Product Warranty ................................1 General Arrangement Drawings ............................2 Dimension Chart ................................4 Speci ication Chart ...............................5 INSTALLATION General Information ...............................6 Loading Softener ................................7 Mounting Control Valve ..............................7 Brine Tank Installation ..............................8 Mounting Water Meter ..............................

  • Page 4: System Information

    MGT 240M–1200M NXT2 3” TWIN ALTERNATING SYSTEM INFORMATION COMMERCIAL AND INDUSTRIAL PRODUCT WARRANTY Manufacturer warrants all commercial and industrial 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 after installation or eighteen (18) months from the date of shipment, whichever comes first.

  • Page 5: General Arrangement Drawings

    MGT 240M–1200M NXT2 3” TWIN ALTERNATING SYSTEM INFORMATION 5-232...
  • Page 6 MGT 240M–1200M NXT2 3” TWIN ALTERNATING SYSTEM INFORMATION...

  • Page 7: Dimension Chart

    MGT 240M–1200M NXT2 3” TWIN ALTERNATING SYSTEM INFORMATION DIMENSION CHART TANK SIZE INLET SIZE LENGTH WIDTH HEIGHT* MODEL SOFTENER BRINE (Inches) (Inches) (Inches) (Inches) (Inches) (Inches) 24x72 24x50 24x72 24x50 30x72 30x50 36x72 39x60 42x72 39x60 42x72 42x60 1050 48x72 42x60 1200 48x72...

  • Page 8: Speci Ication Chart

    MGT 240M–1200M NXT2 3” TWIN ALTERNATING SYSTEM INFORMATION SPECIFICATION CHART MODEL 1200 VALVE SIZE (IN) MAX CAPACITY (KILOGRAINS) 1,200 MIN CAPACITY (KILOGRAINS) CONTINUOUS FLOWRATE (GPM) PEAK FLOWRATE (GPM) BACKWASH & FAST FLUSH (GPM) BRINE DRAW & RINSE (GPM) BRINE TANK REFILL (GPM) BACKWASH &...

  • Page 9: Installation

    MGT 240M–1200M NXT2 3” TWIN ALTERNATING INSTALLATION INSTALLATION INSTRUCTIONS WATER SOFTENERS GENERAL INFORMATION 1. Operating pressure range is 30-100 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 10: Loading Softener

    MGT 240M–1200M NXT2 3” TWIN ALTERNATING 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. Fill tank(s) approximately 1/3 full of water using a hose, bucket, etc. Plug the PVC distributor manifold pipe using a plastic cap, cork, rag, etc.

  • Page 11: Brine Tank Installation

    MGT 240M–1200M NXT2 3” TWIN ALTERNATING INSTALLATION INSTALLATION INSTRUCTIONS 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.
  • Page 12 MGT 240M–1200M NXT2 3” TWIN ALTERNATING INSTALLATION MGT-900 & MGT-1200 BRINE PIPING...

  • Page 13: Mounting Water Meter

    MGT 240M–1200M NXT2 3” TWIN ALTERNATING 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 General Arrangement drawing on page two (2).

  • Page 14: Power Supply Wiring

    MGT 240M–1200M NXT 3” TWIN ALTERNATING INSTALLATION MGT 240M–1200M NXT2 3” TWIN ALTERNATING INSTALLATION 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. Communication Cables Wire Harness Hinge Mount: mount per valve model noted...

  • Page 15: Timer Display Features

    MGT 240M–1200M NXT2 3” TWIN ALTERNATING INSTALLATION 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 16: System Operation

    MGT 240M–1200M NXT2 3” TWIN ALTERNATING INSTALLATION SYSTEM OPERATION System 7 (2 Units) Alternating Immediate One tank online supplying treated water, one tank in Standby. Only #1 control will monitor its flow meter/sensor input. Regeneration of a unit will begin after the other control has left Standby and returned to Service. When the Regenera- tion cycle is complete, the regenerated unit will enter Standby.
  • Page 17 MGT 240M–1200M NXT2 3” TWIN ALTERNATING INSTALLATION 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 18: Start-Up Procedures

    MGT 240M–1200M NXT2 3” TWIN ALTERNATING INSTALLATION 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 19: User Mode Programming Flow Chart

    MGT 240M–1200M NXT2 3” TWIN ALTERNATING INSTALLATION 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 20: Batch Size Calculation

    MGT 240M–1200M NXT2 3” TWIN ALTERNATING INSTALLATION 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 21: Diagnostic Mode Flow Chart

    MGT 240M–1200M NXT2 3” TWIN ALTERNATING INSTALLATION 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 22: Master Programming Flow Chart

    MGT 240M–1200M NXT2 3” TWIN ALTERNATING INSTALLATION 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 23 MGT 240M–1200M NXT2 3” TWIN ALTERNATING INSTALLATION 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 24: Master Programming Guide

    MGT 240M–1200M NXT2 3” TWIN ALTERNATING INSTALLATION MASTER PROGRAMMING - TWIN ALTERNATING (SYSTEM 7) STEP FACTORY SETTING RANGE SETTINGS REVIEW On-Off English, Francais, Deutsch, Italiano, Espanol, Nederlands, Portugues LANGUAGE ENGLISH ASSISTANCE NAME 1 ENTERED BY DEALER ASSISTANCE NAME 2 ENTERED BY DEALER ASSISTANCE PHONE ENTERED BY DEALER System 4 (Single Unit)

  • Page 25: Flow Diagrams

    MGT 240M–1200M NXT2 3” TWIN ALTERNATING OPERATION SERVICE OUTLET SERVICE POSITION INLET DRAIN REGENERATION VALVE SERVICE VALVE INLET Hard water enters at valve inlet and flows down thru mineral to the bottom distributor. Conditioned water flows up thru the distributor tube, around the piston and out the outlet. BACKWASH POSITION BRINE POSITION NO HARD WATER BY-PASS...
  • Page 26 MGT 240M–1200M NXT2 3” TWIN ALTERNATING OPERATION SLOW RINSE POSITION DRAIN INLET Hard water enters at valve inlet  flows thru injector nozzle and throat  down thru the mineral  into the bottom distributor  up the distributor tube  around the piston and out the drain.. RAPID RINSE POSITION BRINE TANK REFILL POSITION SERVICE...

  • Page 27: Wiring Diagram

    MGT 240M–1200M NXT2 3” TWIN ALTERNATING MAINTENANCE NXT2 WIRING DIAGRAM FLOW METER (FM) WIRING GROUND ( - ) POWER ( + ) SIGNAL FLECK BLACK GREEN SIGNET SHIELD BLACK CLACK BLACK WHITE AUTOTROL CLEAR BLACK...

  • Page 28: Powerhead Assembly

    MGT 240M–1200M NXT2 3” TWIN ALTERNATING MAINTENANCE 3150/3900 POWERHEAD ASSEMBLY 32 52 10 8 27 26 11...
  • Page 29 MGT 240M–1200M NXT2 3” TWIN ALTERNATING MAINTENANCE 3150/3900 POWERHEAD PARTS LIST Item No. Part No. Description Item No. Part No. Description 1....1 ..19304-04 ....Backplate, 3150/3900 37 ....1 ..14202-01 ....Screw, Hex Wsh, 8-32 X 5/16 2....1 ..15120 ....Bracket, Motor MTG , 3150/3900 38 ....1 ..

  • Page 30: Nxt2 Timer Assembly

    MGT 240M–1200M NXT2 3” TWIN ALTERNATING 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 31: Control Valve Assembly

    MGT 240M–1200M NXT2 3” TWIN ALTERNATING MAINTENANCE 3900 CONTROL VALVE BODY...
  • Page 32 MGT 240M–1200M NXT2 3” TWIN ALTERNATING MAINTENANCE 3900 CONTROL VALVE PARTS LIST Item No. Part No. Description Item No. Part No. Description ..60107-10 ..Piston Assy, 3900, NHWBP, 1 ....1 ..15114 ....Valve Body Lower 2 ....8 ..11720 ....Seal 40 .....60132 ....Seal &...

  • Page 33: Brine Injector Assemblies

    MGT 240M–1200M NXT2 3” TWIN ALTERNATING MAINTENANCE 1800 BRINE SYSTEM...
  • Page 34 MGT 240M–1200M NXT2 3” TWIN ALTERNATING MAINTENANCE 1800 BRINE SYSTEM PARTS LIST Item No. Part No. Description Item No. Part No. Description 15 ....2 ..18702 ....Fitting, Tube, 1/2 NPT 5/8 1 ....1 ..16340 ....Body, Injector, 1800 D/F 16 ....1 ..18703 ....Tube, Brine, 5/8 OD Annealed ..
  • Page 35 MGT 240M–1200M NXT2 3” TWIN ALTERNATING MAINTENANCE 1800 BRINE SYSTEM PARTS LIST (continued) Item No. Part No. Description Item No. Part No. Description ..60272-07 ..Injector Assy, 1800, #7, 70 gpm Upflow ..60812-75 ..DLFC, 2-inch BSP/Metric, ..60277-08 ..Injector Assy, 1800, #8, 75 gpm Downflow ..
  • Page 36 MGT 240M–1200M NXT2 3” TWIN ALTERNATING MAINTENANCE 1800 BRINE SYSTEM PARTS LIST (continued) Item No. Part No. Description NPT, 3.5 gpm ..60710-4.0 ..BLFC, 1-inch F x 1-inch M, NPT, 4.0 gpm ..60710-5.0 ..BLFC, 1-inch F x 1-inch M, NPT, 5.0 gpm ..

  • Page 37: Meters And Flow Sensors

    MGT 240M–1200M NXT2 3” TWIN ALTERNATING MAINTENANCE 3” STAINLESS STEEL METER ASSEMBLY Item No. Part No. Description 1....1 ..62078-01 ....Service Kit, 3 Inch Meter, Standard Range 1 ..62078-02 ....Service Kit, 3 Inch Meter, Extended Range 2....1 ..61935-10 ....Meter Assy, 3 Inch, Inline, Stainless Steel, NPT, Standard Range ..
  • Page 38 MGT 240M–1200M NXT2 3” TWIN ALTERNATING 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) GALVANIZED...
  • Page 39 MGT 240M–1200M NXT2 3” TWIN ALTERNATING MAINTENANCE CLACK STAINLESS STEEL TURBINE METER ASSEMBLIES K-FACTOR TABLE (pulses per gallon) METER SIZE K-FACTOR 1-1/2" 2" 3" ITEM NUMBER PART NUMBER DESCRIPTION CLACK NO A2360069 1-1/2" METER COMPLETE, 15' CABLE V3040-15 A2426203 2" METER COMPLETE, 15' CABLE V3094-15 A2360072 3"...

  • Page 40: Brine Tank Assemblies

    MGT 240M–1200M NXT2 3” TWIN ALTERNATING MAINTENANCE BRINE SYSTEM - MGT 240M-300M Item Description Part Number Number Brine Tank 24”x50” w/ Holes - MGT 240M-300M B1002016 24” Diameter 5BW Plastic Grid Plate A2284007 Brine Valve (474) for MGT 240 B1180018 Brine Valve (474) for MGT 270 B1180019 Brine Valve (474) for MGT 300...
  • Page 41 MGT 240M–1200M NXT2 3” TWIN ALTERNATING 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 MGT 240M–1200M NXT2 3” TWIN ALTERNATING MAINTENANCE BRINE SYSTEM - MGT 600M 4&5 Item Description Part Number Number Tank Brine 39 X 60 Black Mld Cvr B1002010 Brine Valve Assy 10-1/4 X 30 B1042006 Grid Support Set 39 Dia 22” B1043009 Salt Shelf 38-1/8 Dia.
  • Page 43 MGT 240M–1200M NXT2 3” TWIN ALTERNATING MAINTENANCE BRINE SYSTEM - MGT 750M - MGT 1200M Item Description Part Number Number Brine Tank w/Holes & Cover - 39x60 - MGT 750 B1002019 Brine Tank w/Holes & Cover - 42 X 60 - MGT 900 B1002020 Brine Tank w/Holes &...

  • Page 44: Service Assemblies

    MGT 240M–1200M NXT2 3” TWIN ALTERNATING MAINTENANCE SERVICE ASSEMBLIES AUXILARY MICRO SWITCH A2203010 3200 Series Timer (60320-02) A2203108 Lower Drive (2nd Switch) (60320-11) BRINE VALVES A2005027 Model 1800 brine valve assy (60036-02) COVERS A2103018 Environmental Cover Upper & Lower (60240-02) DRAIN LINE FLOW CONTROLS A2138014 1”...

  • Page 45: Troubleshooting

    MGT 240M–1200M NXT2 3” TWIN ALTERNATING 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 46 MGT 240M–1200M NXT2 3” TWIN ALTERNATING MAINTENANCE TROUBLESHOOTING (CONTINUED) 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 47 MGT 240M–1200M NXT2 3” TWIN ALTERNATING MAINTENANCE TROUBLESHOOTING (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. Timer Not Cycling. C.
  • Page 48 8-634...

This manual is also suitable for:

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