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MARLO NXT2 Series Installation, Operation And Maintenance Manual

System 7 - twin alternating 2” commercial water conditioner
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MGT 60M – 600M
SYSTEM 7 – TWIN ALTERNATING
COMMERCIAL WATER CONDITIONER
INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
COMPLETE FOR FUTURE REFERENCE:
MODEL NO:
SERIAL NO:
DATE INSTALLED:
DEALER:
8-633
2" NXT2 SERIES
Standard Photograph
Equipment appearance may differ.
Twin system shown with skid mount option.

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Summary of Contents for MARLO NXT2 Series

  • Page 1 MGT 60M – 600M SYSTEM 7 – TWIN ALTERNATING 2” NXT2 SERIES Standard Photograph 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:...
  • Page 2 MGT 2” 60M–600M NXT2 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 2” 60M–600M NXT2 TWIN ALTERNATING TABLE OF CONTENTS SYSTEM INFORMATION Product Warranty ................................1 General Arrangement Drawings ............................2 Dimension Chart ................................4 Specification Chart ...............................5 INSTALLATION General Information ...............................6 Loading Softener ................................7 Mounting Control Valve ..............................7 Brine Tank Installation ..............................8 Mounting Water Meter ..............................9 Network Communication Cables/Connections ......................9 Power Supply Wiring ..............................10 Connection Piping Installation .............................10...

  • Page 4: System Information

    MGT 2” 60M–600M NXT2 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 2” 60M–600M NXT2 TWIN ALTERNATING SYSTEM INFORMATION 5-232...
  • Page 6 MGT 2” 60M–600M NXT2 TWIN ALTERNATING SYSTEM INFORMATION...

  • Page 7: Dimension Chart

    MGT 2” 60M–600M NXT2 TWIN ALTERNATING SYSTEM INFORMATION DIMENSION CHART TANK SIZE INLET SIZE LENGTH WIDTH HEIGHT* MODEL SOFTENER BRINE (Inches) (Inches) (Inches) (Inches) (Inches) (Inches) 12x52 18x40 14x65 18x40 16x65 24x40 18x65 24x50 21x62 24x50 24x72 24x50 24x72 24x50 24x72 24x50 30x72...

  • Page 8: Specification Chart

    MGT 2” 60M–600M NXT2 TWIN ALTERNATING SYSTEM INFORMATION SPECIFICATION CHART MODEL VALVE SIZE (IN) MAX CAPACITY (KILOGRAINS) 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 2” 60M–600M NXT2 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 2” 60M–600M NXT2 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 a tank 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 2” 60M–600M NXT2 TWIN ALTERNATING 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 12: Mounting Water Meter

    MGT 2” 60M–600M NXT2 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 Gen- eral Arrangement drawing on page two (2).

  • Page 13: Power Supply Wiring

    MGT 2” 60M–600M NXT2 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. 2510/2750/2815/2850/2900 Valves: Communication Cables Hinge Mount: mount per valve model noted Wire Harness...

  • Page 14: Operation

    MGT 2” 60M–600M NXT2 TWIN ALTERNATING 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 15: System Operation

    MGT 2” 60M–600M NXT2 TWIN ALTERNATING OPERATION 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 16 MGT 2” 60M–600M NXT2 TWIN ALTERNATING 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 17: Start-Up Procedures

    MGT 2” 60M–600M NXT2 TWIN ALTERNATING 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 18: User Mode Programming Flow Chart

    MGT 2” 60M–600M NXT2 TWIN ALTERNATING 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 19: Batch Size Calculation

    MGT 2” 60M–600M NXT2 TWIN ALTERNATING 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 20: Diagnostic Mode Flow Chart

    MGT 2” 60M–600M NXT2 TWIN ALTERNATING 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 21: Master Programming Flow Chart

    MGT 2” 60M–600M NXT2 TWIN ALTERNATING 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 22 MGT 2” 60M–600M NXT2 TWIN ALTERNATING 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 23: Master Programming Guide

    MGT 2” 60M–600M NXT2 TWIN ALTERNATING OPERATION 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 24: Flow Diagrams

    MGT 2” 60M–600M NXT2 TWIN ALTERNATING OPERATION SERVICE POSITION BRINE VALVE FLOW CONTROL DRAIN DRAIN INLET BRINE OUTLET LEVEL RESIN BRINE TANK TANK Hard water enters unit at valve inlet and flows down thru the mineral in the mineral tank. Conditioned water enters center tube thru the bottom distributor —...
  • Page 25 MGT 2” 60M–600M NXT2 TWIN ALTERNATING OPERATION BACKWASH POSITION BRINE VALVE FLOW CONTROL DRAIN INLET OUTLET BRINE LEVEL RESIN BRINE TANK TANK Hard water enters unit at valve inlet — flows to the front passage and up through the front passage to regenerating valve —...
  • Page 26 MGT 2” 60M–600M NXT2 TWIN ALTERNATING OPERATION BRINE POSITION BRINE VALVE FLOW CONTROL INLET OUTLET BRINE LEVEL RESIN BRINE TANK TANK Hard water enters unit at valve inlet — flows up into injector housing and down thru nozzle and orifice to draw brine from the brine tank —...
  • Page 27 MGT 2” 60M–600M NXT2 TWIN ALTERNATING OPERATION SLOW RINSE POSITION BRINE VALVE FLOW CONTROL DRAIN INLET OUTLET BRINE LEVEL BRINE RESIN TANK TANK Hard water enters unit at valve inlet — flows up into injector housing and down thru nozzle and orifice — around the piston —...
  • Page 28 MGT 2” 60M–600M NXT2 TWIN ALTERNATING OPERATION RAPID RINSE POSITION BRINE VALVE FLOW CONTROL DRAIN INLET OUTLET BRINE LEVEL BRINE RESIN TANK TANK Hard water flows thru the regenerating valve directly down thru the mineral into the bottom distributor and up thru the center tube —...
  • Page 29 MGT 2” 60M–600M NXT2 TWIN ALTERNATING OPERATION BRINE TANK FILL POSITION BRINE VALVE FLOW CONTROL DRAIN INLET INLET OUTLET BRINE LEVEL BRINE RESIN TANK TANK Hard water flows thru the service valve and down thru the mineral. Conditioned water enters the bottom distributor — flows up the center tube around the piston to the outlet.

  • Page 30: Wiring Diagram

    MGT 2” 60M–600M NXT2 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 31: Powerhead Assembly

    MGT 2” 60M–600M NXT2 TWIN ALTERNATING MAINTENANCE 2900 POWERHEAD ASSEMBLY...
  • Page 32 MGT 2” 60M–600M NXT2 TWIN ALTERNATING MAINTENANCE 2900 POWERHEAD PARTS LIST Item No. Quantity Part No. Description 1 ....1 ....18697-15 ....backplate, hinged 2 ....1 ....60219-02 ....cover assy, environmental, black 3 ....1 ....60160-10 ....drive cam assy, stf, black 4 ....

  • Page 33: Nxt2 Timer Assembly

    MGT 2” 60M–600M NXT2 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 34: Control Valve Assembly

    MGT 2” 60M–600M NXT2 TWIN ALTERNATING MAINTENANCE 2900 CONTROL VALVE BODY...
  • Page 35 MGT 2” 60M–600M NXT2 TWIN ALTERNATING MAINTENANCE 2900 CONTROL VALVE PARTS LIST Item No. Quantity Part No. Description 1 ... 1 ... 41428 ....Valve Body, 2900 CPI, Machined 1 .

  • Page 36: Brine Injector Assemblies

    MAINTENANCE MGT 2” 60M–600M NXT2 TWIN ALTERNATING 1600 Brine System MAINTENANCE 1600 BRINE SYSTEM Item No. Quantity Part No. Description 1 ... . 1... . . 10328 ....90° Elbow - ¼ Pipe Thd. to 3/8” Tube 2 .
  • Page 37 MGT 60M–600M NXT 2” METERED MGT 2” 60M–600M NXT2 TWIN ALTERNATING MAINTENANCE MAINTENANCE 1700 Brine System 1700 BRINE SYSTEM ASSEMBLY Page 47...
  • Page 38 MGT 60M–600M NXT 2” METERED MAINTENANCE MGT 2” 60M–600M NXT2 TWIN ALTERNATING MAINTENANCE 1700 Brine System Parts List 1700 BRINE SYSTEM PARTS LIST Item No. Quantity Part No. Description 1 ... 1 ... 14792 ....End Plug 2 .

  • Page 39: Meters And Flow Sensors

    MGT 60M–600M NXT 2” METERED MAINTENANCE MGT 2” 60M–600M NXT2 TWIN ALTERNATING MAINTENANCE 2” Plastic Paddle Meter 2” PLASTIC PADDLE METER Item No. Quantity Part No. Description 1 ....1 ....17689 ....Body, Meter, 2” Plastic w/Impeller Shaft Seat 2 ....
  • Page 40 MGT 2” 60M–600M NXT2 TWIN ALTERNATING MAINTENANCE 2” STAINLESS STEEL METER ASSEMBLY Item No. Part No. Description Item No. Part No. Description 1....1 ..62048-01 ....Service Kit, 2 inch Meter, 4....1 ..19791 ....Meter Cable Assembly, Standard Range ..19791-02 ....Meter Cable Assembly, 1 ..
  • Page 41 MGT 2” 60M–600M NXT2 TWIN ALTERNATING MAINTENANCE 2536 SIGNET FLOW 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 42 MGT 2” 60M–600M NXT2 TWIN ALTERNATING MAINTENANCE AUTOTROL 2” TURBINE METER K-FACTOR TABLE AUTO TURBINE METER (Pulses per Gallon) METER SIZE K-FACTOR ITEM NUMBER PART NUMBER DESCRIPTION A2100019 2” Meter With Stainless Steel Adapter A2100004 2” Meter With Pvc Adapter A2100005 2”...
  • Page 43 MGT 2” 60M–600M NXT2 TWIN ALTERNATING MAINTENANCE CLACK 2” TURBINE METER V3050 WS2 2” Meter NPT Assembly and V3050BSPT WS2 2” Meter BSPT Assembly Service or replac 1. Removing ben of the retaining c 2. Service or repl B indicates BSPT Turbine Assembl N indicates NPT turbine shaft.

  • Page 44: Brine Tank Assemblies

    MGT 2” 60M–600M NXT2 TWIN ALTERNATING MAINTENANCE BRINE SYSTEM - MGT 60M-90M TUBING KIT Item Part Description Number Number Brine Tank 18”x40” Black Molded Cover - MGT 60 - 90M A2042028 Brine Valve Assembly 474 w/ Aircheck - MGT 60M - 90M B1179005 5”...
  • Page 45 MGT 2” 60M–600M NXT2 TWIN ALTERNATING 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 46 MGT 2” 60M–600M NXT2 TWIN ALTERNATING MAINTENANCE BRINE SYSTEM - 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 47 MGT 2” 60M–600M NXT2 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 48: Service Assemblies

    MGT 2” 60M–600M NXT2 TWIN ALTERNATING MAINTENANCE SERVICE ASSEMBLIES AUXILARY MICRO SWITCH A2154001 Valve/RO Lockout (10218) A2154003 Homing Switch (10896) BRINE VALVES B1042012 Model 16006Brine Valve Assy. - 1GGPM (60029&60020-100) A2254002 Model 1600 Brine Valve Assy. - 2 GPM (60034-20) A2254003 Model 1600 Brine Valve Assy.

  • Page 49: Troubleshooting

    MGT 2” 60M–600M NXT2 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 50 MGT 2” 60M–600M NXT2 TWIN ALTERNATING 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 51 MGT 2” 60M–600M NXT2 TWIN ALTERNATING 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. Timer Not Cycling. C.
  • Page 52 8-633...

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