GE Merlin User Manual

36 pages

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GE Infrastructure

Water and Process Technologies

Merlin™

Point of Use

Drinking Water System

Application Guide for Water Treatment Professionals

Table of Contents

Other manuals for GE Merlin

Installation And Maintenance Manual28 pages

Questions and Answers:

G
Gregg CampbellAug 1, 2025
How to fix low permeate flow in GE Water System?
- S
  stephanie67Aug 1, 2025
  To address low permeate flow in your GE Water System: * Measure the actual flow rate from the faucet. * Replace a plugged prefilter; consider a sediment prefilter for non-chlorinated applications. * Replace scaled or fouled RO membrane elements. * Adjust the faucet t-bar setting as tight as possible without causing leaks. * If the flow into the postfilter is acceptable, replace the postfilter. * Repair any leaks or kinks in the permeate line. Also, check if the net driving pressure and/or inlet temperature are too low.
S
Sheila GuzmanAug 7, 2025
What to do if concentrate water runs to drain after faucet shut off in GE Water System?
- T
  Timothy MillsAug 7, 2025
  If concentrate water continues to run to drain after the faucet is shut off in your GE Water System, it could be due to a few reasons. First, trapped air in the system might be affecting the automatic shut-off valve's operation; try installing a postfilter or ASO cartridge. Another cause could be a clogged prefilter reducing pressure in the permeate line, so inspect and replace the prefilter if it's clogged. Lastly, a leak in the permeate line could also reduce pressure; find and repair any leaks.
A
Ashley TurnerAug 13, 2025
Why is there low permeate flow from refrigerator or to automatic ice maker with acceptable flow from faucet in GE Water System?
- A
  Alyssa PetersAug 13, 2025
  If you're experiencing low permeate flow from the refrigerator or to the automatic ice maker, but acceptable flow from the faucet with your GE Water System, the issue might be due to pressure drops. Using a larger tubing diameter can help, avoid 1/4-inch tubing. Also, try to reduce the elevation difference between the system and the dispensing location. Another cause could be pressure drop across the refrigerator/ice maker filter. You can remove the built-in filter according to the refrigerator/ice maker manufacturer's instructions. Finally, check if the refrigerator/ice maker water inlet screen is plugged and clean it according to the manufacturer's instructions.
J
Jessica HendersonAug 19, 2025
Why is TDS rejection lower than expected in GE Water System?
- J
  joshuawheelerAug 19, 2025
  Lower than expected TDS rejection in your GE Water System can be caused by a scaled, deteriorated, or ruptured RO membrane element; replace the element and ensure zero ppm chlorine reaches it. It could also be due to a TDS reading taken on salt-diffused water after a period of inactivity. Take the reading during steady-state operation.

GE Merlin Specifications

General

Type	Reverse Osmosis System
Filtration Technology	Reverse Osmosis
Membrane Type	Thin Film Composite
Operating Temperature	40-100°F
Warranty	1 year limited
Filter Life	Prefilter: 6 months, Membrane: 2-5 years, Postfilter: 1 year

Summary

SYSTEM PERFORMANCE

THE MERLIN SWEET SPOT

Illustrates the recommended operating pressure and temperature range for the Merlin system.

Flow Rates

Lists factors affecting flow performance and steps to estimate it.

Understanding Net Driving Pressure

Explains Net Driving Pressure (NDP) as flowing inlet pressure minus system pressure drop.

System Pressure Drop

Details sources of pressure drop like tubing, obstructions, and post filter.

THE MERLIN FLOW SYSTEM

MERLIN BOOSTER PUMP

PREFILTER

MEMBRANE LIFE

MERLIN RECOVERY VS. EFFICIENCY

SALT DIFFUSION

TROUBLESHOOTING

Low permeate flow

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