Marey ECO240 User manual

Congratulations!
You'vejustpurchasedanew Marey ECO240 tankless water heater and will
soon begin to enjoy the benefits of “going tankless.”
Takethetimetothoroughlyreadandunderstandthissafetyand installation
manualinitsentiretybeforeyouattempttoinstallyournewECO240tankless
waterheater,asitcontainsimportantsafetytipsandinstructions.
Pleasecarefullyreadallinstructionsandwarnings. Ifyouneedassistance or
have any questions please contact us at:
Please keep this manual for future referenceandtechnicalinformation.
1-512-332-2229
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TROUBLE-SHOOTING / DIAGNOSTIC CHART
WARNINGS
IMPORTANT SAFETY INFORMATIONS
PRODUCT FEATURES
PRODUCTADVANTAGES
INSTALLATION DIAGRAM
ELECTRICAL DIAGRAM
TECHNICAL SPECIFICATIONS AND INSTALLATION REQUIREMENTS
PRODUCT INNER STRUCTURE
INSTALLATION GUIDELINE
CUSTOMER SERVICE
OTHER PRODUCTS
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4002422

12. If there is damage to the wiring or any internal part, you must contact a qualified
electrician to replace it, or send it to one of our service centers for repair.
ReplacementpartsareavailablefromMarey.
13. The shower head should be cleaned and checked periodically for debris and
build-up.
14. Thiswaterheatermustbeinstalledvertically,perthemountinginstructions.
15.CAUTION:FORHOUSEHOLDANDINDOORUSEONLY
1. Energy efficient, instantaneous heating on demand. It's tankless, so no pre-
heatingandnostand-byheatloss,whichsavesevenmoreenergy.
2.Micro-computercontrolled,patentedheatingtechnology.
3. Extremely safe! Water is completely separated from electricity by multi-layers of
composite nano-insulation material, and the heater contains multiple additional
safetydevices,asoutlinedbelow.
4. Low voltage/power fluctuation protection. If the unit detects an electrical
fluctuation(duetoapowersupplyvoltagedrop,loosewire, etc), the electricity will be
cut-off within milliseconds by the fluctuation protector. If this occurs, the screen
displaysanE2code.
5. Malfunction sensor. If there is a malfunction with the temperature sensor, the
heaterstopsworkingandthescreendisplaysanE3code.
6. Dry-heatingthermalcut-off.Incase ofdryheating,the electricitywillbecut offand
thescreendisplaywilldisplayanE4code.
7. Micro-computer features an automatic electricity and water consumption
calculatingfunction.
8. ReadstemperatureinbothFahrenheitandCelsius.
This is not a do-it-yourself project. If you are not familiar with basic plumbing and
electricity, we strongly recommend that this water heater be installed by a licensed
plumberorelectrician.
Installationofthisproductisrestrictedtoindoorlocations.
Under no circumstances should you attempt to install, repair or disassemble the
Marey Heater tankless electric water heater without first shutting off all power to the
unitdirectlyatthecircuitbreakerpanel.
1. The installation must be in compliance with your local electrical and plumbing
codes.
2.ThiswaterheatermustbeGROUNDED.
3.Allwiringandinstallationmustbesupervisedbyaqualifiedelectrician.
4. CAUTION: This product has more than one power-supply connection point.
Disconnectallpowersuppliesbeforeservicing.
5. This water heater is not intended for use by persons (including children) with
reduced physical, sensory or mental capabilities, or lack of experience or
knowledge, unless they have been given supervision or instruction concerning the
use of the water heater by a person responsible for their safety. Children should be
supervisedtoensurethattheydonotplaywiththewaterheater.
6.ThiswaterheaterMUSTbepermanentlyconnectedtoafixedcircuitbreaker.
7. DO NOT install this water heater near volatile or flammable substances, near
tinderwoodornearastrongmagneticfield.
8.DONOTswitchtheheateronifyoususpectthatitmaybefrozen.Waituntilyouare
surethatithascompletelythawedout.
9. Before taking a shower, feel the outlet hot water temperature with your hand to
makesureitissuitableforshoweringtoavoidgettingscalded.
10. Before connecting the water heater hoses to the plumbing in your home, it is
extremelyimportantto FLUSHthelinestowash outanyplumbingpasteorresiduein
thelines.
11. The heating chamber is treated with composite nano-insulation material. It is
normalfortheretobeaslightodorandpossiblyasmallamountofgreen/bluesmoke
whentheunitisusedforthefirsttime.
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Marey heating element is made from a single piece of cast aluminum, so there will
neverbewaterleakagenortheelectricleakageintheheatingchamber.Mareyalso
haveanextrastainlesssteel water flow channelinsteadoftheoldaluminum, so no
matter how is your water quality inside the heating element, the heat element will
servicealonglife.
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Fig. 02

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Fig. 04
08
Height to the Ground
Sealer
Release Valve
Wash with Filer
Inlet Water
2000mm
Power
Supply
E N L
Air Switch
Fig. 03
Display Screen
Up
On/Off
Down
Temp. Sensor
Flowmeter Terminal Blocks
Display Screen
Control Board
Buttom Case

NOTE: Installation must be in compliance with the National Electrical Code and
yourlocalelectricalandplumbingcodes.
1. Donotinstalltheunitinaroomwherethereisachanceoffreezing.
2. DO NOT install this water heater near tinder, volatile or flammable substances,
or near a strong magnetic field. The unit must only be mounted in a VERTICAL
positionnearthewaterfittings.
3. Mount the unit to a flat section of wall, well away from any potential water
splashesorspray. Besuretousewallanchors,orscrewdirectlyintostuds.
4.Positiontheunituprightwithallplumbingconnectionsatthebottomoftheunit.
5.Makesurethewaterheaterandallfittingsarecompleteandintact.
6. Make sure that the main power supply, water pressure, ground, amperage,
voltage,andwiringmeetallstandards.
7. The water heater must be connected to a properly-grounded, dedicated branch
circuit with the proper voltage rating. The ground must be connected to the
“ground”atthecircuitbreakerpanel.
8. This water heater MUST be permanently connected to a fixed and dedicated
circuitbreaker.Iftheheaterwillbeunused,switchoffthecircuitbreaker.
INSTALLATION
Locate an appropriate place on a section of wall that meets all safety and
installationrequirements.
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Fig. 05
Front and back of the appliance (please see Fig. 05).
Removethescrewwhichfixesthebracketonthebackoftheappliance(Fig.06).
Removethebracketfromtheappliance(Fig.07).
Fig. 06
Fig. 07

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Hold the back bracket hanger in position against the wall in the desired hanging
location. Check to make sure that the bracket is level. Mark the wall where the
three mounting holes should be located. Drill holes of ¼” diameter in the marked
locations.Ifyouare onastud,screwthebracketdirectlyintothewall. Ifyouarenot
on a stud, insert the plastic anchor in the hole, and secure the bracket using the
screwssupplied(Fig.08).
Remove (4) screws and washers (Fig 09) from the unit to free the front cover.
Carefully lift the front cover off the unit a few inches. Disengage the plug
connecting the front cover LCD panel to the body of the unit (Fig 10). Remove the
covercompletely.
Please note: If LCD connection cable cannot be disengaged, simply set the front
coverasideandkeepthecableconnected.
Fig. 08
Fig. 09
Fix the appliance to the hanging bracket. Make sure the unit is properly secured to
thebracket(SeeFig.11).
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Fig. 10
Fig. 11

Connect the power cable at the lower right side of the unit to the terminal block.
Each wire in the cable is labeled to correspond with spaces in the terminal block.
Make sure that you plug the appropriately labeled wire into the corresponding
space on the terminal block. Note that the unit will be connected to two circuit
breakers(Fig.12).
ImportantNotesAboutElectricalConnections:
1. Before beginning any work on the electric installation, be sure that the main
breakerpanelswitchisOFFtoavoidanydangerofelectricshock.Allmountingand
plumbingmustbecompletedbeforeproceedingwiththeelectricalinstallation.
2. All electrical work must comply with national and applicable state and local
electricalcodes.
3. All units must be connected to a properly grounded dedicated branch circuit of
propervoltagerating.
4. This product requires three independent circuit breakers. Use threeinsulated
wiresforthethreeseparatedouble-polebreakers.
5.Whenconnectingthewirestotheterminalblocks,makesurethemetalwireends
and the terminal blocks completely touch. Then, tighten the screws securely.
Failure to properly tighten can result in current escape and burning of the terminal
blocks.
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Fig. 12
Reattach the cable for the LCD panel if disconnected and reinstall the front cover
usingthescrewsandwasherspreviouslyremoved.(Fig.13).
Connectthecoldwater supplytothethreadedpipelabeled“inlet”and thehotwater
tothethreadedpipelabeled“outlet.”IMPORTANT: RUBBERWASHERMUSTBE
USEDFORPROPERSEAL.(Fig.14) Connectionsare3/4”NPT.
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Fig. 14
Fig. 13

ImportantNotesAboutWaterConnections:
1. All water pipe must comply with national and applicable state and local water
pipecodes.
2. A pressure relief valve must be installed if the cold water supply pressure
exceeds150PSI.
3. The unit should be connected directly to the main water supply. Flush pipe with
watertoremoveanydebrisorlooseparticles.
4.All connections to the unit should be ¾” NPT. Larger pipe can be connected but
theappropriateadaptersmustbeused.
5. Please remember to install rubber seal rings at the connections. When all water
connections are completed, check for leaks and take corrective action before
proceeding.
HowtheUnitworks
1.Thisunitheatswaterinstantaneouslyasitflowsthroughtheheatingelements.
2.Theelectroniccontrolmonitorstheflowrateandtheincomingwatertemperature
and then switches on the required number of heating elements to reach the set
temperature.
3. The outlet water temperature will be higher than the setting if the minimum flow
rate isn't met. The outlet water temperature will be lower than the setting if the
maximumflowrateisexceeded.
UsingtheWaterHeater-OperationInstructions
1. Turn on the water and allow it to run through the unit for a few minutes, until
water flow is continuous and all air is purged from the water pipes. Check for and
correctanyleakingconnections.
2.Turnonthecircuitbreakertoconnectpowertotheunit.
3. PressON/OFFtostarttheunit.
Ifthereispowertotheunit,butnodigitaldisplay,turnoffthecircuitbreaker. Double
check to make sure that the cable to the LCD panel on the front cover is correctly
connectedinsidetheunit,thenturnthebreakerbackon.
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4. After the unit is supplied with power, a beep sound can be heard and an LED
lights up for 2 seconds. If no other function is turned on, the unit stands by in this
mode.
5. Press “ON/OFF” to start or stop the unit. When the unit is ON, the LED display
showstheactualwatertemperatureoftheoutletwater.After5seconds,thescreen
switchestoascreen saver to conservepower.Thedisplayscreenlightwill be off.If
youtouchthescreen,itwilllightupagain.
6. The outlet water temperature can be adjusted by changing the temperature
settings on the heater. Press and to adjust the temperature. The range of
optionsforthetemperaturesettingis30ºC-52ºC/86ºF-127ºF.
WARNING: Ifthe unithas beenused recently, youmay initiallyget a short burst of
very hot water from the unit.Allow a few seconds for the water to cool down to the
setpoint.Testthewaterbeforeyoutakeashower.
If the unit will not be used during winter, drain out any water completely so that the
heaterwillnotfreeze.
Periodically clean the inlet filter screen and the shower head to maintain strong
waterflow.
7.Press thenpress toconvertthetemperaturedisplaybetweenFahrenheit
andCelsius.
8. The unit features an automatic memory function to avoid repetitive operation.
Whenyouturnon the waterheater,thedefault set point willbethesame as the last
settingused.
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WARNING: Corrections to problems 8, 9 and 10 should only be performed by
qualified electrician. The person who initially installed the unit is the best one to
contactforhelp,orcontactMareyforservice.
NORMALMAINTENANCE
Note: Do not attempt to repair this water heater yourself. Call a service person for
assistance.Alwaysturnoffthebreakerbeforeworkingontheunit.
Toensureconsistentwaterflow,thefollowingisrecommended:
1. Periodically remove build-up and dirt that may accumulate at the aerator of the
faucetorintheshowerhead.
2. Periodically clean the built-in filter screen at the inlet connection on the water
heater. Waterfaucetmustbeturnedoffbeforecleaningthescreen.

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1-512-332-2229
[e-mail]
GAS PORTABLE
AQUAMATIC POWER GAS
SANTON
ECO110 POWER PAK
21
Delbrey Street, 211
San Juan, Puerto Rico
00912
Tel. [phone]
www.marey.com
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team.
Pleasefeelfreetocontactusifyouhaveanyquestionsaboutourproducts, warranty
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