GE Merlin Manuel

GE Infrastructure

Water and Process Technologies

Merlin™

Point of Use

Drinking Water System

Installation and Maintenance Manual

Rev D

SAFETY GUIDES 3

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SAFETY GUIDES

Read and follow all steps and guides carefully before installing and

using your reverse osmosis system.

Do not use this product to make safe drinking water from non-potable

water sources. Do not use the system on microbiologically unsafe

water, or water of unknown quality without adequate disinfection

before or after the system.

This reverse osmosis system contains replaceable components

(membrane elements). These components are critical for the effective

reduction of total dissolved solids and specific contaminants that are

listed in the Product Data Sheet.

The Merlin drinking water system does not have a monitoring device

for contaminants. To verify that the system is performing satisfactorily

the product water should be tested periodically by the system’s

installing dealer every six months. See the back cover of this manual

for the installing dealer’s contact information.

Consult yourlocal public works department for plumbing and sanitation

codes. Follow your local codes if they differ from this manual.

The reverse osmosis system works on water pressures of 40 psi

(2.8 bar) minimum to 80 psi (5.5 bar) maximum. Water pressure can

be reduced by installing a pressure reducing valve in the water supply

pipe to the RO system. A booster pump should be used for low

pressure applications.

Do not install the reverse osmosis system in extreme hot or cold

temperatures. Temperature of the water supply to the reverse osmosis

system must be between 40°F (°C) and 100°F (38°C). Do not install on

hot water lines.

The reverse osmosis membranes contain a foodgrade preservative for

storage and shipment. New membranes should be flushed for one

hour prior to use. This flush removes the preservative. The

preservative is not harmful but makes the product water taste

objectionable.

4 THE BASIC REVERSE OSMOSIS SYSTEM

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THE BASIC REVERSE OSMOSIS SYSTEM

Your Merlin™ Reverse Osmosis (RO) Drinking Water System is a

water treatment unit. It uses water pressure to reverse a natural

physical process called osmosis. Water, under pressure, is forced

through a semi-permeable membrane to filter out minerals and

impurities. Clean drinking water goes to the faucet. Minerals and

impurities are sent to the drain with RO waste water.

The system includes replaceable filters and membrane elements. The

prefilter removes sand, silt, dirt, rust particles, other sediments, and

chlorine from the water supply before they enter the RO membrane

elements. The postfilter removes any tastes and/or odors that may

remain in the water after passing through the RO membrane elements.

BEFORE INSTALLING THE RO SYSTEM

• Best performance of the system will be achieved when the

incoming water has been treated (softened).

• The water coming into the system must be within certain limits for

sediments, pressure, etc. Refer to the specifications to determine if

your installation is within the limits.

• A water quality analysis can be performed to determine if incoming

water requires any treatment. Contact your dealer/installer.

• The filters and membrane elements in the RO system need to be

replaced ona regularbasis. Follow the instructionsfor replacement

that are in this manual.

• The faucet options for the Merlin RO have not been tested or

certified by the Water Quality Association. It is recommended that

faucets meeting National Codes be used.

NOTE: For optimal system performance, use the system for at least

2 minutes continuously each day.

WARNING: The Merlin RO system is designed to work without the

aid of a storage tank. Installation of a pressurized storage tank will

negatively affect system performance.

THE BASIC REVERSE OSMOSIS SYSTEM 5

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REVERSE OSMOSIS PACKAGE

The reverse osmosis system is purchased as an installation kit. Two kit

options are available: Merlin I, P/N 1255052 includes a faucet and air

gap. Merlin II, P/N 1263870 does not include a faucet or air gap.

Before starting installation check that the following components are

available:

Quantity Item Part Number

1 Manifold 1244617

1 Support Leg 1239708

1 Locking Bar 1239731

1 Disconnect Elbow and O-ring—Flush Mechanism 1240119

1 1/4-inch Collet Lock Clip 1240626

1 1/4-inch Plug 1240624

1 Disconnect Elbow and O-ring— Feed Water 1240117

2 1/2-inch Collet Lock Clip 1240628

1 Disconnect Elbow and O-ring—Concentrate Stream 1264462

1 Disconnect Elbow and O-ring—Permeate Stream 1240118

5 3/8-inch Collet Lock Clip 1240627

3 White Sumps 1239705

3 Sump O-ring 1240326

2 Lubricant, Silicone 1013501

1 3/8-inch Tube-To-Threaded Tubing Connection 1240625

Tubing

4 feet 1/2-inch Natural Color Inlet 1240622

4 feet 3/8-inch Blue Color Product 1240621

4 feet 3/8-inch Black Color Concentrate 1240620

3 feet 1/2-inch Red Color Drain 1240623

Faucet Kit

1* Faucet and Air Gap 1254894

* Faucet and air gap not included with Merlin II

Drain Connection

1 Packaged Drain Boa Kit 1240564

Filters

2 Membrane Elements 1238342

1 White Carbon Prefilter 1237460

1 In-Line 3/8-inch Carbon Post Filter 1244746

NOTE: The system inlet (feed water) connection/valve is not

included in the standard package. Contact your system supplier.

6 THE BASIC REVERSE OSMOSIS SYSTEM

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LOCATION OF SYSTEM The reverse osmosis system is designed for installation under a sink,

usuallyin the kitchen or bathroom. The RO assembly can be placed on

the cabinet floor in any position that does not apply pressure on the

disconnect elbows. The RO product water faucet installs on the sink or

on the countertop next to the sink.

The RO system can also be located in a location away from the faucet.

A nearby water source and drain point are required.

Water Supply: To provide supply water to the RO system inlet, a feed

supply fitting is required or install pipe fittings as needed.

Drain Point: A suitable drain point is needed for reject water from the

RO system. A floor drain, laundry tub, standpipe, sump, etc. are all

acceptable. A sink p-trap drain adapter is included to install as an

optional drain point where codes permit.

All components and tubing should be located in an area which is not

exposed to freezing temperatures. Do not expose unit or tubing to

direct sunlight.

Dispensing Faucet: The faucet should be placed near the sink where

drinking water is normally obtained. Convenience of use (filling of

water pitchers and glasses) and an open area beneath the faucet

under the sink for attaching product and drain tubing are

considerations. A 2-inch diameter flat surface is required above and

below the installation site. The thickness of mounting surface should

not exceed 1-1/4 inches. Avoid any strengthening webbing on the

underside of the sink.

RO Manifold Assembly: The manifold can be installed on either the

right or left side of the under-sink area or cabinet. Installation in the

basement is also an option. One possible location is near the

laundry/utility sink where cold potable water and drain access are

close. The location chosen should allow adequate clearance and

accessibility for membrane element changes.

Feed Water Connection: The feed water valve should be located as

close to the manifold assembly as possible. USE A POTABLE COLD

WATER SUPPLY ONLY. Softened water is preferred as it will extend

the life of the RO membrane element.

NOTE: Keep the lengths of tubing short. Longer lengths of tubing

will decrease system performance. A booster pump can be used on

the supply line.

NOTE: The feed water connection is not included in the package.

THE BASIC REVERSE OSMOSIS SYSTEM 7

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Drain Connection - Depending on plumbing codes, the waste water

may need to go to drain through an anti-siphon air gap. A detachable

faucet air gap is included with the system. If discharging into the utility

sink or standpipe, an air gap of greater than 1.5 inches above the flood

rim must be provided.

Do not connect the system drain line to the dishwasher drain or near

the garbage disposal. Back pressure from these units may cause the

air gap to overflow.

In restricted under-sink areas, it may be easier toinstall the faucet first.

Allow adequate tubing lengths for final system placement.

Figure 1 Typical Under-Sink Installation

NOTE: All plumbing should be done in accordance with state and

local plumbing codes.

Some codes may require installation by a licensed plumber; check

with the local plumbing authority prior to installation.

Dispensing Faucet

with Air Gap

Inlet-1/2" Natural

Feed Water Valve

Cold Water Line Only Carbon Postfilter

Waste Concentrate

3/8" Black

Drain - 1/2" Red

Product - 3/8" Blue

Drain Coupling

Install above P trap

Plugged Top Connector

Locking Bar

Keep to Minimum

Prefilter

RO Membranes

ort Le

(

sum

wrench

)

Manifold

Elbow

Connectors

Note: If a flush tank is not

installed the manifold

connection must remain

plugged. Removal of

plug will cause a system

leak.

8 THE BASIC REVERSE OSMOSIS SYSTEM

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Figure 2 Typical Basement Installation

Floor

Flush Tank

(Optional)

Dispensing Faucet

without Air Gap

1.5" Air Gap Required

Inlet-1/2" Natural

Drain - 3/8" Black

Feed Water Valve

Cold Water Line Only

1/4" Blue

Carbon Postfilter

Product - 3/8" Blue

RO Assembly

Note: If a flush tank is not

installed the manifold

connection must remain

plugged. Removal of

plug will cause a system

leak.

THE BASIC REVERSE OSMOSIS SYSTEM 9

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REQUIRED TOOLS AND MATERIALS

• Adjustable wrench, and larger adjustable jaw pliers or pipe wrench

to fit sink drain

• Saw for cutting drain pipe

• Slotted and Phillips head screwdrivers

• Tubing cutters

• Electric drill and bits for cutting the faucet mounting hole

Note that some sinks will have a pre-drilled hole with a plug for the

faucet.

INSTALLATION STEP 1: Install cold water supply valve

STEP 2: Install drain adapter

STEP 3: Install faucet

STEP 4: Make tubing connections

STEP 5: Install RO assembly

STEP 6: Put system into operation

STEP 1: INSTALL COLD WATER SUPPLY VALVE

Comply with local plumbing codes. A typical connection using a water

supply valve is shown. The feed water valve is not included with

system. Contact supplier for this item.

Water Supply Valve

Cold water pipes vary in size and style. The installer will determine

type of valve that will be used. Install a valve on the cold water supply

pipe to adapt 1/2-inch OD tubing. If threaded fittings are used, be sure

to use pipe joint compound or Teflon tape on outside threads.

Turn the valve off.

NOTE: Consult a licensed plumber if you are not familiar with

plumbing procedures.

NOTE: Be sure to turn off the water supply and open a low faucet to

drain the pipe.

10 THE BASIC REVERSE OSMOSIS SYSTEM

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STEP 2: INSTALL DRAIN ADAPTER

Follow the instructions in the Appendix for installation of the Drain

Boa™, if used.

The drain adapter is designed to fit 1-1/2-inch (3.8 cm) sink drain pipe.

The adapter installs directly to the sink tailpiece.

STEP 3: INSTALL FAUCET

A. Prepare Mounting Hole

1. Select a location for the faucet. Be sure it will fit flat against the sink

or counter and that there is space underneath for tubing.

2. If drilling is needed, make a 1-1/8-inch to 1-1/4-inch diameter hole.

Figure 3

WARNING: To avoid damaging a sink, consult a qualified plumber

or installer for the proper method of drilling holes in porcelain or

stainless steel.

Gasket Air Gap Module

Trim Ring

Standoff

Washer

Nut

Water In Connection

Horseshoe

Clip

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