Marey ECO180 User manual

Congratulations!
You've just purchased a new Marey ECO tankless water heater and will soon
begintoenjoythebenefitsof“goingtankless.”
Please take the time to thoroughly read and understand this safety and
installation manual in its entirety before you attempt to install your new
tanklesswaterheater,asitcontainsimportantsafetytipsandinstructions.
Please carefully read all instructions and warnings. Should you have any
questions,pleasevisitwww.marey.comforinstallationvideosandFAQ.
Pleasekeepthismanualforfuturereferenceandtechnicalinformation.
23

0504
If your water heater requires a reset, be sure to TURN OFF THE BREAKERS prior to
resettingtheunit.
Resetting your unit without turning off the breakers can result in personal injury and
damagetoyourwaterheater.
WARNING!Thereis watercontainedinthecoilsofyourwaterheateratall times.Ifyour
water heater is exposed to freezing temperatures, the water in the coils could freeze,
causing a break in the heat exchanger of the unit, or the supply and return lines.This
kind of damage will result in water running freely into the space where the water heater
is located, which can cause flooding. DO NOT install this water heater where it may be
subjected to a freeze. If your water heater is in an area where freezing is a possibility,
you must turn off the water to the heater and drain it of any water by disconnecting the
waterlines.Leavethewaterlinesdisconnecteduntilyouintendtousethewaterheater.
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
plumberand/orelectrician.
Installationofthisproductisrestrictedtoindoorlocations.
Underno circumstancesshouldyou attempt toinstall, repairor disassemblethe Marey
Heater tankless electric water heater without first shutting off all power to the unit
directlyatthecircuitbreakerpanel.
1.Theinstallationmustbeincompliancewithyourlocalelectricalandplumbingcodes.
2.ThiswaterheatermustbeGROUNDED.
3.Allwiringandinstallationmustbesupervisedbyaqualifiedelectrician.
4. CAUTION: This product has more than one power-supply connection point.
Disconnectallpowersuppliesbeforeservicing.
5.Thiswaterheateris notintended forusebypersons(including children)withreduced
physical, sensory or mental capabilities, or lack of experience or knowledge, unless
theyhavebeen givensupervisionor instructionconcerning theuseof thewaterheater
by a person responsible for their safety. Children should be supervised to ensure
thattheydonotplaywiththewaterheater.
6.ThiswaterheaterMUSTbepermanentlyconnectedtoafixedcircuitbreaker.
ECO180|ECO210|ECO240|ECO270
1-Mounting
Mount vertically on a flat surface (i.e. board or wall) larger than the unit itself. Make
sure bracket is secure by utilizing a stud or the provided wall anchors. Keep away
fromanypotentialsplashingorleakingwaterandstrongmagneticfields.
2-Waterconnections
When installing your water connections make sure to use ¾” NPT fittings. Please
use the provided gaskets to prevent leaks. When tightening fittings use a back-up
wrench on inlet and outlet fittings (flat sides of fittings are located behind front
cover). It is recommended to install a high pressure discharge valve and a shut off
valveonthe incoming waterline,in that order. Open afaucet and runwaterthrough
theunitforafew minutestopurge outair, turnoffatfaucettobuilduppressurein the
linetocheckforleaks.
3-Electricalconnections
Wiring for electrical connection will differ depending on model please double check
themodeltypeontherightsideoftheunit.
Requirements:
ECO180-Two220VDoublePole50ampbreakers
ECO210-Three220VDoublePole40ampbreakers
ECO240-Three220VDoublePole40ampbreakers
ECO270-Three220VDoublePole50ampbreakers
4-Operation
Unit is activated by the flow of water through the inlet. A desired temperature set
point is selected by using the “up” or “down” buttons, if unit does not respond push
thecenter“power”buttonandtryagain.
Testwatertopreventscalding.
E L1
L2
Ground Breaker 1 Breaker 2
L1
L2
ECO180
Breaker 3
E L1
L2
Ground Breaker 1 Breaker 2
L1
L2 L1 L2
ECO210| ECO240 | ECO 270

06
5. Malfunction sensor. If there is a malfunction with the temperature sensor, the
heaterstopsworkingandthescreendisplaysanE3code.
6.Dry-heatingthermalcut-off.In caseofdryheating,theelectricitywillbecutoff and
thescreendisplaywilldisplayanE4code.
7. Micro-computer features an automatic electricity and water consumption
calculatingfunction.
8.ReadstemperatureinbothFahrenheitandCelsius.
Fig. 01
Fig. 02
Mareyheating elementsaremadefromasinglepiece ofcast
aluminum, so there will never be water leakage non electric
leakage in the heating chamber. Marey heaters also have an
extra stainless steel water flow channel instead of the
previous layered plate style, so no matter how your water
quality is inside the heating element, it will provide a long life
ofservice.
2 x 50 amp 2-pole
208/240V Breakers
ECO180
07
7. DO NOT install this water heater near volatile or flammable substances, near
tinderwoodornearastrongmagneticfield.
8. DO NOT switch the heater on if you suspect that it may be frozen. Wait until you
aresurethatithascompletelythawedout.
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
extremely important to FLUSH the lines to wash out any plumbing paste or residue
inthelines.
11. The heating chamber is treated with composite nano-insulation material. It is
normalfortheretobeaslightodorandpossiblyasmallamountofgreen/bluesmoke
whentheunitisusedforthefirsttime.
12. If there is damage to the wiring or any internal part, you must contact a qualified
electriciantoreplaceit,orsendittooneofourservicecentersforrepair.
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
preheatingandnostand-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. Over-heating thermal cut-off to avoid scalds. When the outlet water temperature
reaches153°F/67°C,theelectricityisautomaticallycutoff.Ifthisoccurs,thescreen
beepsanddisplaysanE1code.

08 09
Power 21kW
Min. Water Flow to Activate the Unit 0.85 GPM
Water Connections 3/4" NPT
TECHNICAL SPECIFICATIONS ECO210
Max. Amperage Load 88A
Min. Required Circuit Breaker Size 3x40A
Recommended Wire Size* 8/2 (x2) and 8/3 (x1)
Max. Temp. Increase at 1.5 GPM 80ºF
11" x 16.1" x 3,5"
Weight 16.4 lbs
Width x Height x Depth
Temp. Scope
86~127ºF
Installation Vertical Mounted
Control Manual
Voltage 240V
Frequency 60Hz
24kW
ECO240
100A
3x40A
80ºF
27kW
ECO270
112.5A
3x50A
80ºF
18kW
ECO180
75A
2x50A
80ºF
GPM
TEMP.
INCREASE
TEMPERATURE INCREASE PER GPM
1.0
1.5
2.0
2.5
3.0
3.5
4.0
5.0
5.5
4.5
6.0
6.5
ECO210
80º
76º
71º
60º
51º
40º
45º
38º
34º
87º
---
---
80º
72º
67º
59º
51º
43º
45º
42º
40º
87º
38º
---
ECO240
80º
76º
72º
67º
59º
48º
51º
45º
43º
87º
42º
38º
ECO270ECO180
80º
74º
56º
46º
42º
31º
36º
29º
---
87º
---
---
8/2 (x1)
and 8/3 (x1)
*Wire gauge varies by amperage and distance; must contact electrician if you are not sure.
*Temperature increases
listed are based on use of the
water heater under optimal
conditions with an incoming
water temperature of 48ºF.
Variable factors such as
incorrect or imperfect
installation or warmer
incoming water temperature
mayyielddifferentresults.
Fig. 04
Water out
High pressure discharge valve
Ball valve/shut off valve
Water in
ECO210/240 = 3 x 40 amp
2-pole 208/240V Breakers
ECO270 = 3 x 50 amp
2-pole 208/240V Breakers
ECO210, 240, 270

10 11
NOTE:InstallationmustbeincompliancewiththeNationalElectricalCodeandyour
localelectricalandplumbingcodes.
1.Donotinstalltheunitinaroomwherethereisachanceoffreezing.
2.DO NOTinstall thiswater heaternear tinder,volatileor flammablesubstances, or
nearastrongmagneticfield.Theunitmust onlybemountedinaVERTICALposition
nearthewaterfittings.
3.Mounttheunittoaflatsectionofwall,wellawayfromanypotentialwatersplashes
orspray.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
bar”atthecircuitbreakerpanel.
8.This waterheater MUSTbepermanentlyconnectedtofixedanddedicatedcircuit
breakers.Iftheheaterwillbeunused,switchoffthecircuitbreakers.
INSTALLATION
Locateanappropriate placeonasectionofwallthatmeetsall safetyandinstallation
requirements.
Frontandbackoftheappliance(pleaseseeFig.07).
E L1 L2 L1 L2
Bottom case
Control board
Display screen
Terminal blocks
Flowmeter
Temp.sensor
heating chamber
ECO180
E L1 L2 L1 L2 L1 L2
Bottom case
Control board
Display screen
Terminal blocks
Flowmeter
Temp.sensor
heating chamber
ECO210|240|270
Fig. 05
Water out
High pressure discharge valve
Ball valve/shut off valve
Water in
Fig. 06
ECO180
ECO210|240|270

12 13
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
mounting holes should be located. Drill holes of ¼” diameter in the marked
locations. If you are on a stud, screw the bracket directly into the wall. If you are not
on a stud, insert the plastic anchor in the hole, and secure the bracket using the
screwssupplied(Fig.10).
Remove (4) screws and washers (Fig 11) from the unit to free the front cover.
Carefully lift the front cover off the unit a few inches. Disengage the ribbon cable
connecting the front cover LCD panel to the main control board or the unit (Fig 12).
Removethecovercompletely.
Please note: If LCD connection cable cannot be disengaged, simply set the front
coverasideandkeepthecableconnected.
Fig. 11
Fig. 10
Fig. 07
Fig. 08
Fig. 09
Fig. 08
Fig. 09

Please use a backup wrench when installing water fittings. Connections are 3/4”
NPT(Fig.13)
ImportantNotesAboutElectricalConnections:
1. Before beginning any work on the electrical installation, be sure that the main
breakerpanelswitch is OFFtoavoid any dangerofelectric shock.All mounting and
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. ECO180: Requires two dedicated double pole circuit breakers (2x50amp). Use
twoinsulatedsupply cablesperdoublepolebreaker andagroundwire toconnectto
“ground bar”. ECO210|240|270: Require three dedicated double pole circuit
breakers (3x40amp for ECO210|240; 3x50amp for ECO270). Use two insulated
wires for each of the three separate double-pole breakers and a ground wire
connectedtothe“groundbar”
14 15
Outlet
Rubber Washers
Inlet Backup Wrench
Fig. 13
Attach unit to mounting bracket by sliding onto tabs. Make sure the unit is properly
securedtobothtabsofthebracket.Installbottom,centerscrewtoaffixtheunittothe
brackettocompletemounting.
ImportantNotesAboutWaterConnections:
1.Allwaterpipemustcomplywith nationaland applicablestate andlocal waterpipe
codes.
2. The unit should be connected directly to the main water supply. Flush pipe with
watertoremoveanydebrisorlooseparticles.
3.All connections to the unit should be ¾” NPT. Larger pipe can be connected but
theappropriateadaptersmustbeused.
4. 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.
Connect the cold water supply to the threaded pipe labeled “inlet” and the hot water
to the threaded pipe labeled “outlet.” IMPORTANT: RUBBER WASHER MUST BE
USEDFORPROPERSEAL.
Fig. 12
Fig. 13

5. Whenconnectingthe wiresto theterminalblocks, makesure themetalwire ends
andtheterminalblockscompletely touch.Then,tightenthescrewssecurely.Failure
toproperlytightencanresultinanelectricalshortandburningoftheterminalblocks.
Connect the power at the lower right side of the unit to the terminal block. Each pair
ofL1andL2shouldhaveitsowncorrespondingdoublepolledbreaker.Notethatthe
ECO 180 unit will be connected to two double pole circuit breakers while the ECO
210,240,270unitswillbeconnectedtothreedoublepolecircuitbreakers(Fig.14).
Fig. 14
ECO180
ECO210, 240, 270
16 17
Reattach the ribbon cable for the LCD panel if disconnected and reinstall the front
coverusingthescrewsandwasherspreviouslyremoved.(Fig.15).
HowtheUnitworks
1.Thisunitheatswaterinstantaneouslyasitflowsacrosstheheatingelements.
2.The electronic controlmonitorsthe flow rateand the incomingwatertemperature
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. Turnonthe waterandallow ittorun throughtheunit fora few minutes,until water
flow is continuous and all air is purged from the water pipes. Check for and correct
anyleakingconnections.
Fig. 15

18 19
Problems Possible Causes Corrective Actions
1. Inlet and outlet
fittings leaking A. Fittings not tight B. Rubber washer worn-out A. Tighten fittings. B. Change rubber washer.
2. Blank screen A. Power not connected.
B. LCD damaged.
C. LCD not connected to PCB.
A. Connect power to the unit.
B. Change LCD.
C. Connect LCD to the PCB Board.
3. Functional keys not
working A. No water output. B. Water flow is too low.
C. Key or PCB damaged.
A. Check water supply valves.
B. Open valve to increase flow.
C. Change key or PCB.
4. Water too hot A. Temperature setpoint too high.
B. Water flow is too low. A. Set a lower temperature. B. Open valve to increase water flow.
5. Water too cold A. Low temperature set.
B. Too much waer flow. A. Set a higher temperature. B. Reduce water flow.
6. Outlet flow noticeably
decreases Inlet strainer or shower clogged. Clean strainer and shower.
7. LED displays E1 Outlet temperature is over
67 deg «C» /153ºF. A. Reduce the temperature. B. Turn up the water flow.
8. LED displays E3 Temperature sensor failure. Please contact with the local dealer.
9. LED displays E4 Dry Heating. Shut off. Clean all outlets from any
debris, dirt, any particle or scale inside
the pipe.
10. Pressure relief
valve releases water A. Outlet blocked. B. Inlet pressure over 100psi or 0.7Mpa. A. Clean shower set. B. Reduce water pressure.
11. Display overflow Inlet water flow is too high. Reduce the inlet water flow.
WARNING: Corrections to problems 8, 9 and 10 should only be performed by
qualifiedelectricianor plumber. Thepersonwho initially installedtheunit is thebest
onetocontactforhelp,orcontactMareyforservice.
2.Turnonthecircuitbreakerstoprovidepowertotheunit.
3. Press the center button to turn on the heater. NOTE it will not start heating until
waterisprovidedtotheunit.
If there is power to the unit, but no digital display, turn off the circuit breaker. Double
check to make sure that the cable to the LCD panel on the front cover is correctly
connectedinsidetheunit,thenturnthebreakerbackon.
4. After the unit is supplied with power, a beep sound can be heard and the display
flashestheset temperature, then goessolid showing the actualoutput temperature
for30secondsuntilthescreengoesblank.theunitisnowinstandbymode.
5. Press the power button to activate/ deactivate the unit. When the unit is ON, the
LEDdisplayshowstheactualwatertemperatureoftheoutletwater.
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-125ºF.
WARNING: If the unit has been used recently, you may initially get a short burst of
veryhotwaterfromtheunit.Allowafewsecondsforthewatertocooldowntotheset
point. Test the water before you take a shower. If the unit will not be used during
winter,drainoutanywatercompletelysothattheheaterwillnotfreeze.
Periodically clean the inlet filter screen and the shower head to maintain strong
waterflow.
7. Press thenpress toconvertthe temperature displaybetweenFahrenheit
andCelsius.
8. The unit features an automatic memory function to avoid repetitive operation.
When you turn on the water heater, the default set point will be the same as the last
settingused.

20 21
REMARK: R:HEATING SYSTEM T:TRIACL: LINE
L1
L1'
L1"
T1
T2
T3
R1
R2
R3
L2"
E
THERMAL CUT-OUT 90¡æ
CONTROL
SYSTEM
DISPLAY
SCREEN INLET TEMP.SENSOR
FLOWMETER
OUTLET TEMP.SENSOR
L2
L2'
REMARK: R:HEATING SYSTEM T:TRIACL: LINE
L1
L1'
T1
T2
R1
R2
L2
E
THERMAL CUT-OUT 90¡æ
CONTROL
SYSTEM
DISPLAY
SCREEN INLET TEMP.SENSOR
FLOWMETER
OUTLET TEMP.SENSOR
L2'
Fig. 17
Fig. 18
NORMALMAINTENANCE
Note: Do not attempt to repair this water heater yourself. Please call a service
person for assistance.Always be sure to turn off all the breakers connected to your
unitbeforeservicing.
TO ENSURE CONSISTENT WATER FLOW, THE FOLLOWING IS
RECOMMENDED:
1. Periodically remove build-up and dirt that may accumulate at the aerator of the
faucetorintheshowerhead.
2. Periodically clean the built-in filter screen in the inlet connection of your water
heater.Watersupply mustbeturnedoffbeforecleaningthescreen.
#4 or #9
#11
Arrows and
waves
indicate
waterflow
Campfire
indicates
to heating
elements
power
Fig. 16

ECO110
POWER GAS 16L ETL
SANTON
POWER GAS
POWER PAK
GAS PORTABLE
22 23
1-855-MAREY-55
[e-mail]
At Marey, we pride ourselves on the excellence of
ourcustomerserviceandsupportteam.
Please feel free to contact us if you have any
questions about our products, warranty service, or if
you need assistance installing a unit. We also strive
for continuous improvement, so we welcome your
comments,feedbackandsuggestions.
Fig. 19
PleasevisitourwebsitetogettoknowmoreaboutotherMareyproducts.
Marey:
1924 HWY 95 North
Bastrop, TX 78602
Tel: [phone]
Toll Free: 1-855-627-3955
1-855-MAREY-55
www.marey.com