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MARLO NXT2 Series - User Manual

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

Questions and Answers

  • P
    Patrick SmithSep 23, 2025
    How to fix 'Error System Type Mismatch on Network' on MARLO Water System?
    • M
      Mark ChaseSep 23, 2025
      If the MARLO Water System displays 'Error System Type Mismatch on Network', it means the system type among connected units does not match. To correct this, push the correct system settings in Master Settings.
  • G
    Grant WarnerAug 25, 2025
    What does 'Flow Meter Error Continuous Flow Detected' mean on my MARLO NXT2 Water Dispenser?
    • E
      elizabeth42Aug 26, 2025
      If your MARLO Water Dispenser shows a 'Flow Meter Error Continuous Flow Detected', it means that the flow has exceeded the specified threshold for a specific duration. To fix this, trigger a manual regeneration.
  • R
    Richard TrujilloAug 27, 2025
    Why does the drain of my MARLO NXT2 Water Dispenser flow continuously?
    • M
      Mrs. Tracy HoganAug 27, 2025
      If the drain of your MARLO Water Dispenser flows continuously, it could be due to several reasons: the valve is not programming correctly (check timer program and positioning of control, replace power head assembly if not positioning properly), foreign material in the control (remove power head assembly and inspect bore, remove foreign material and check control in various regeneration positions), or an internal control leak (replace seals and piston assembly).
  • J
    jbakerAug 27, 2025
    What causes excessive water in the brine tank of my MARLO Water Dispenser?
    • D
      Dr. Jessica McmillanAug 27, 2025
      Excessive water in the brine tank of your MARLO Water Dispenser can be caused by a plugged drain line flow control (clean flow control), a plugged injector system (clean injector and screen), the timer not cycling (replace timer), foreign material in the brine valve (replace brine valve seat and clean valve), or foreign material in the brine line flow control (clean brine line flow control).
  • J
    Jessica PriceNov 22, 2025
    Why does my MARLO NXT2 softener fail to regenerate?
    • J
      Jeffrey McculloughNov 22, 2025
      If your MARLO Water Dispenser softener fails to regenerate, several issues could be the cause. It could be due to an interruption in electrical service (check the fuse, plug, pull chain, or switch), a defective timer (replace the timer), or a power failure (reset the time of day). Other causes include an open by-pass valve (close it), no salt in the brine tank (add salt and maintain the level above the water level), a plugged injector screen (clean it), or insufficient water flowing into the brine tank (check the brine tank fill time and clean the brine line flow control if plugged). Hardness in the hot water tank may also be the reason (repeated flushings of the hot water tank is required), a leak at the distributor tube (make sure the distributor tube is not cracked and check the O-ring ...
  • M
    Mary KnoxSep 14, 2025
    How to fix excessive water in brine tank of MARLO Water System?
    • M
      Michelle EdwardsSep 14, 2025
      If you find excessive water in the brine tank of your MARLO Water System, it's likely due to a plugged drain line flow control. Clean the flow control to resolve this issue.
  • D
    Deanna WilsonSep 12, 2025
    What to do if my MARLO Water System displays 'Flow Meter Error Continuous Flow Detected'?
    • V
      Virginia EvansSep 12, 2025
      If the MARLO Water System displays 'Flow Meter Error Continuous Flow Detected', this indicates that the flow has exceeded the specified threshold for a certain duration. To solve this, trigger a manual regeneration.
  • A
    Amanda KleinSep 13, 2025
    Why is the drain flowing continuously in my MARLO Water System?
    • J
      jennifer37Sep 13, 2025
      If your MARLO Water System's drain is flowing continuously, this is due to an internal control leak. You should change the seals, spacers, and piston assembly.
  • A
    Angela MurphySep 5, 2025
    What does 'Error System Type Mismatch on Network' mean on my MARLO Water Dispenser?
    • R
      rebeccalozanoSep 5, 2025
      If your MARLO Water Dispenser displays 'Error System Type Mismatch on Network', it indicates that the system type among connected units does not match. To resolve this, push the correct system settings in Master Settings.
  • M
    Ms. Tracy MossSep 3, 2025
    Why does my MARLO NXT2 control cycle continuously?
    • A
      Amanda EdwardsSep 3, 2025
      If your MARLO Water Dispenser control cycles continuously, it is caused by a misadjusted, broken, or shorted switch. Determine if the switch or timer is faulty and replace it, or replace the complete power head.

Summary

System Information

Product Warranty

Details the warranty coverage for commercial and industrial water treatment products.

Dimension Chart

Provides physical dimensions for various MGT models, aiding in space planning.

Specification Chart

Lists key technical specifications, capacities, and flow rates for different system sizes.

Installation Warnings

General Installation Warnings

Crucial safety precautions and warnings applicable before, during, and after installation.

Inspection Requirements

Specific checks required for components like distributor piping and laterals before media loading.

Important Safety Information

General safety advisories regarding product installation and use.

Installation Procedures

General Installation Information

Covers operating pressure, power requirements, and unit design considerations.

Softener Tank Setup

Guides on locating, erecting, and preparing softener tanks for media loading.

Brine Tank Installation

Instructions for positioning and connecting the brine tank, including tubing and overflow.

Meter and Network Setup

Covers mounting water meters and connecting network/communication cables between units.

Power and Piping Connections

Details electrical power connection and proper piping installation for system integrity.

Operation

Timer Display and Controls

Explains the functions of LEDs, display screen, and control buttons on the timer.

System and Timer Operation

Describes system modes, timer functions during normal use, and power failures.

Regeneration Initiation and Control

Details manual regeneration, programming lock settings, and settings review.

Programming Modes and Calculations

Covers user mode, batch size calculation, and diagnostic mode flow charts.

Master Programming and Flow Diagrams

Explains master programming and provides diagrams of regeneration flow positions.

Maintenance

Wiring Diagrams

Provides the NXT2 wiring diagram for electrical connections and troubleshooting.

Powerhead Assembly Details

Illustrates and lists parts for the 2900 Powerhead Assembly.

Timer Assembly Details

Shows the NXT2 Timer Assembly and its components.

Control Valve Assembly Details

Illustrates and lists parts for the 2900 Control Valve Body.

Brine System Components

Details components and parts lists for 1600 and 1700 Brine Systems.

Meter Components

Describes various meter types and their parts.

Brine Tank Configurations

Lists components and part numbers for different brine tank sizes.

Service Assemblies

Lists available service assemblies, kits, and accessories for the system.

Troubleshooting

Detected Errors

Lists error messages, their causes, and recommended corrections for system issues.

2900 Valve Troubleshooting

Provides a table of common problems with the 2900 valve, their causes, and solutions.

MARLO NXT2 Series Specifications

General IconGeneral
BrandMARLO
ModelNXT2 Series
CategoryWater Dispenser
LanguageEnglish

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