Marey ECO180 Operating and maintenance manual

Keep this manual with you after your unit has been installed, you
may need it for further technical information.
ECO180 | ECO270
ELECTRIC TANKLESS WATER HEATER
INSTRUCTIONAL
MANUAL
USA [phone] PR [phone]www.Marey.com

Congratulations! You’ve just purchased a new Marey ECO tankless water heater and
will soon begin to enjoy the benets of“going tankless.”
Please take the time to thoroughly read and understand this safety and installation
manual in its entirety before you attempt to install your new tankless water heater,
as it
contains important safety tips and instructions.
Please carefully read all instructions and warnings. Should you have any questions,
please visit www.marey.com for installation videos and FAQ.
Please keep this manual for future reference and technical information.

INDEX
QUICK START GUIDE
WARNING
IMPORTANT WARNINGS
IMPORTANT SAFETY INFORMATIONS
PRODUCT FEATURES
PRODUCT ADVANTAGES
INSTALLATION DIAGRAM
TECHNICAL SPECIFICATION REQUIREMENTS
PRODUCT INNER STRUCTURE
INSTALLATION GUIDELINE
TROUBLE-SHOOTING/DIAGNOSTIC CHART
ELECTRICAL DIAGRAM
CUSTOMER SERVICE
04
05
05
05
06
07
07
09
10
11
19
21
23

ECO180
ECO270
Unit is activated by the ow 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
the center "power" button and try again. Test water to prevent scalding.
4) Operation
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
from any potential splashing or leaking water and strong magnetic fields.
2) Water Connections
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
valve on the incoming water line, in that order. Open a faucet and run water through
the unit for a few minutes to purge out air, turn off at faucet to build up pressure in
the line to check for leaks.
3) Electrical Connections
Wiring for electrical connection will differ depending on model please double check
the model type on the right side of the unit.
ECO180 | 270
QUICK START GUIDE
04
GROUN BREAKER 1
ECO180 -
BREAKER 2
Two 240V Double Pole 50 amp breakers
GROUND BREAKER 1 BREAKER 2 BREAKER 3
ECO270 - Three 240V Double Pole 50 amp breakers

WARNING
If your water heater requires a reset, be sure to TURN OFF THE BREAKERS prior to
resetting the unit.
Resetting your unit without turning off the breakers can result in personal injury and
damage to your water heater.
WARNING! There is water contained in the coils of your water heater at all times. If
your 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 water lines. Leave the water lines disconnected until you intend to
use the water heater.
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
plumber and/or electrician.
Installation of this product is restricted to indoor locations.
Under no circumstances should you attempt to install, repair or disassemble the Marey
Heater tankless electric water heater without rst shutting o all power to the unit
directly at the circuit breaker panel.
1) The installation must be in compliance with your local electrical and plumbing
codes.
2) This water heater must be GROUNDED.
3) AII wiring and installation must be supervised by a qualified electrician.
4) CAUTION:This product has more than one power-supply connection point.
Discon-nect all power supplies before servicing.
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 supervised
to ensure that they do not play with the water heater.
IMPORTANT WARNINGS
IMPORTANT SAFETY INFORMATION
05

6. This water heater MUST be permanently connected to a xed circuit breaker.
7. DO NOT install this water heater near volatile or ammable substances, near tinder
wood or near a strong magnetic eld.
8. DO NOT switch the heater on if you suspect that it may be frozen. Wait until you are
sure that it has completely thawed out.
9. Before taking a shower, feel the outlet hot water temperature with your hand to
make sure it is suitable for showering to avoid getting scalded.
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 in
the lines.
11. The heating chamber is treated with composite nano-insulation material. It is
normal for there to be a slight odor and possibly a small amount of green/blue smoke
when the unit is used for the rst time.
12. If there is damage to the wiring or any internal part, you must contact a qualied
electrician to replace it, or send it to one of our service centers for repair.
(Replacement parts are available from Marey.)
13. The shower head should be cleaned and checked periodically for debris and
build-up.
14. This water heater must be installed vertically, per the mounting instructions.
1. Energy ecient, instantaneous heating on demand. It's tankless, so no preheating
and no stand-by heat loss, which saves even more energy.
2. Micro-computer controlled, patented heating technology.
3. Extremely safe! Water is completely separated from electricity by multi-layers of
composite nano-insulation material, and the heater contains multiple additional safety
devices, as outIined below.
4. Over-heating treaches 153° F / 67°C, the electricity is automatically cut o. If this
occurs, the screen hermal cut-o to avoid scalds. When the outlet water temperature
beeps and displays an E1 code.
PRODUCT FEATURES
06

INSTALLATION DIAGRAM
5. Malfunction sensor. If there is a malfunction with the temperature sensor, the
heater stops working and the screen displays an E3 code.
6. Dry-heating thermal cut-off. In case of dry heating, the electricity will be cut off and
the screen display will display an E4 code.
7. Micro-computer features an automatic electricity and water consumption calculat-
ing function.
PRODUCT ADVANTAGES
Marey heating elements are made from a single piece of
cast 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 of service.
EC0180
Fig. 02
2x50amp 2-pole
208/240V Breakers
Fig. 01
07

High pressure
discharge valve
ECO270 = 3 x 50am
2-pole 208/240V Breakers
Ball valve/shut off valve
Water in
Water out
Fig. 03
Fig. 04
08

Energy
Minimum Required Circuit Breaker
Max. Amp. Load
Min. Wire Size
Voltage/Frequency
Water Connections
Recommended Min. Flow Activation
Safe Operating Pressure
Dimensions
Weight
*Wire gauge varies by amperage and distance; must contact electrician if you are not sure.
240V, 60Hz
3/4” NPT
0.85 GPM / 3.2 L/min
5 PSI - 85 PSI
11.0” x 16.1” x 3.5”
27kW
3x50A
112.5A
3x6
AWG Copper
18kW
2x50A
75A
2x6
AWG Copper
17.7 lbs 18.3 lbs
PRODUCT CODE ECO180 ECO270
ECO270
ECO180
TECHNICAL SPECIFICATIONS AND INSTALLATION REQUIREMENTS
*Gallons per minute indicated on the Temperature Increase table are calculated assuming an
outlet temperature of 105°F. Variable factors such alternate incoming water temperature or
incorrect installation may yield dierent results.
GPM
1.0
1.5
2.0
2.5
3.0
3.5
4.0
5.0
6.0
6.5
103°F
82°F
61°F
49°F
41°F
35°F
31°F
28°F
-
-
184°F
123°F
92°F
74°F
61°F
53°F
46°F
37°F
31°F
28°F
Temp. Increase
per GPM
ECO180 ECO270
KW
18 kW
Power
AMP
2x50 Amp
Breaker
KW
27 kW
Power
AMP
3x50 Amp
Breaker
240V
V
Multiple Points
Of Use
50ft Max Distance
To Point of Use
MAX
Digital Panel Non-Corrisive
German
Technology
Overtemp
Protection
Works with
Low Pressure
No Preheat Micro-Chip
Computer
09

1. Energy ecient, instantaneous heating on demand. It's tankless, so no preheating
and no stand-by heat loss, which saves even more energy.
2. Micro-computer controlled, patented heating technology.
3. Extremely safe! Water is completely separated from electricity by multi-layers of
composite nano-insulation material, and the heater contains multiple additional safety
devices, as outIined below.
4. Over-heating treaches 153° F / 67°C, the electricity is automatically cut o. If this
occurs, the screen hermal cut-o to avoid scalds. When the outlet water temperature
beeps and displays an E1 code.
PRODUCT INNER STRUCTURE
260mm
285mm
ECO180 ECO180 Bottom Case
Control Board
Display Screen
Temp.
Sensor
Flowmeter
Heating Chamber
Terminal blocks
E L1 L2 L1 L2
260mm
285mm
ECO270 ECO270 Bottom Case
Control Board
Display Screen
Temp. Sensor
Flowmeter
Heating Chamber
E L1 L2 L1 L2 L1 L2
Fig. 05
High pressure
discharge valve
Ball valve/shut off valve
Water in
Water out
Fig. 06
Terminal blocks
10

NOTE: Installation must be in compliance with the National Electrical Code and your local
electrical and plumbing codes.
1. Do not instal I the unit in a room where there is a chance of freezing.
2. DO NOT install this water heater near tinder, volatile or ammable substances, or
near a strong magnetic eld. The unit must only be mounted in a VERTICAL position
near the water ttings.
3. Mount the unit to a at section of walI, welI away from any potential water splashes
or spray. Be sure to use wall anchors, or screw directly into studs.
4. Position the unit upright with all plumbing connections at the bottom of the unit.
5. Make sure the water heater and all ttings are complete and intact.
6. Make sure that the main power supply, water pressure, ground, amperage, voltage,
and wiring meet all standards.
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" at the circuit breaker panel.
8. This water heater MUST be permanently connected to xed and dedicated circuit
breakers.
If the heater will be unused, switch o the circuit breakers.
INSTALLATION
Locate an appropriate place on a section of wall that meets all safety and installation
requirements.
Front and back of the appliance (please see Fig. 07).
INSTALLATION GUIDELINES
11

Fig. 07
Fig. 08
Fig. 09
12

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
mount-ing 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
screws supplied (Fig.10).
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). Remove the cover completely.
Please note: If LCD connection cable cannot be disengaged, simply set the front
cover aside and keep the cable connected.
Fig. 11
13

Fig.12
Attach unit to mounting bracket by sliding onto tabs. Make sure the unit is properly
secured to both tabs of the bracket. Install bottom, center screw to ax the unit to
the bracket to complete mounting.
Important notes about water connections:
1. All water pipe must comply with national and applicable state and local water pipe
codes.
2. The unit should be connected directly to the main water supply. Flush pipe with
water to remove any debris or loose particles.
3. AlI connections to the unit should be ¾" NPT. Larger pipe can be connected but the
appropriate adapters must be used.
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
USED FOR PROPER SEAL.
14

1.Before beginning any work on the electrical installation, be sure that the main
breaker panel switch is OFF to avoid any danger of electric shock. All mounting and
plumbing MUST BE completed before proceeding with the electrical installation.
2. AII electrical work must comply with national and applicable state and local
electrical codes.
3. AII units must be connected to a properly grounded, dedicated branch circuit of
proper voltage rating.
4. ECO18O: Requires two dedicated double pole circuit breakers (2x5Oamp). Use two
insulated supply cables per double pole breaker and a ground wire to connect to
"ground bar". ECO27O: Require three dedicated double pole circuit breakers
(3x5Oamp for EC027O). Use two insulated wires for each of the three separate
double-pole breakers and a ground wire connected to the "ground bar".
Please use a backup wrench when installing water fittings. Connections are 3/4"
NPT (Fig. 13).
Important notes about electrical connections:
15
Fig.13
Outlet
Rubber Washers
Inlet
Backup Wrench

5. When connecting the wires to the terminal blocks, make sure the metal wire ends
and the terminal blocks completely touch. Then, tighten the screws securely. Failure
to properly tighten can result in an electrical short and burning of the terminal blocks.
Connect the power at the lower right side of the unit to the terminal block. Each pair
of Ll and L2 should have its own corresponding double polled breaker. Note that the
ECO 180 unit will be connected to two double pole circuit breakers while the EC0270
unit will be connected to three double pole circuit breakers (Fig.14).
ECO180
ECO270
16
Fig.14

Reattach the ribbon cable for the LCD panel if disconnected and reinstal I the front
cover using the screws and washers previously removed. (Fig.15).
1. This unit heats water instantaneously as it ows across the heating elements.
2. The electronic control monitors the ow rate and the incoming water temperature
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 ow
rate isn't met. The outlet water temperature will be lower than the setting if the
maximum ow rate is exceeded.
Using the water heater-operation instructions
1. Turn on the water and allow it to run through the unit for a few minutes, until water
ow is continuous and all air is purged from the water pipes. Check for and correct any
leaking connections.
How the unit works
17
Fig. 15

2. Turn on the circuit breakers to provide power to the unit.
3. Press the center button to turn on the heater. NOTE it will not start heating until
water is provided to the unit.
If there is power to the unit, but no digital display, turn o the circuit breaker. Double
check to make sure that the cable to the LCD panel on the front cover is correctly
connected inside the unit, then turn the breaker back on.
4. After the unit is supplied with power, a beep sound can be heard and the display
flashes the set temperature, then goes solid showing the actual output temperature
for 30 seconds until the screen goes blank. the unit is now in standby mode.
5. Press the power button to activate/deactivate the unit. When the unit is ON, the
LED display shows the actual water temperature of the outlet water.
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
options for the temperature setting is 30°C-52°C/86° F-125° F.
WARNING: If the unit has been used recently, you may initially get a short burst of very
hot water from the unit. Allow a few seconds for the water to cool down to the set
point. Test the water before you take a shower. If the unit will not be used during
winter, drain out any water completely so that the heater will not freeze.
Periodically clean the inlet lter screen and the shower head to maintain strong water
ow.
7. Press then press to convert the temperature display between Fahrenheit and
Celsius.
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
setting used.
18

1. Inlet and outlet
ttings leaking
2. Blank screen
3. Functional keys
not working
4. Water too hot
5. Water too cold
6. Outlet ow
noticeably decreases
7. LED displays E1
8. LED displays E3
9. LED displays E4
10. Pressure relief
valve releases water
11. Display overow
A. Fittings not tight
B. Rubber washer worn-out
A. Power not connected.
B. LCD damaged.
C. LCD not connected to PCB.
A. No water output.
B. Water ow is too low.
C. Key or PCB damaged.
A. Temperature setpoint too high.
B. Water ow is too low.
A. Low temperature set.
B. Too much waer ow.
Inlet strainer or shower clogged.
Outlet temperature is over
67°«C»/ 153° F.
Temperature sensor failure.
Dry Heating.
A. Outlet blocked.
B. Inlet pressure over lOOpsi or 0.7Mpa.
Inlet water ow is too high.
A. Tighten fittings.
B. Change rubber washer.
A. Connect power to the unit.
B. Change LCD.
C. Connect LCD to the PCB Board.
A. Check water supply valves.
B. Open valve to increase flow.
C. Change key or PCB.
A. Set a lower temperature.
B. Open valve to increase water flow.
A. Set a higher temperature.
B. Reduce water flow.
Clean strainer and shower.
A. Reduce the temperature.
B. Turn up the water flow.
Please contact with the local dealer.
Shut off. Clean all outlets from any
debris, dirt, any particle or scale
inside the pipe.
A. Clean shower set.
B. Reduce water pressure.
Reduce the inlet water ow.
PROBLEMS POSSIBLE CAUSES CORRECTIVE ACTIONS
WARNING: Corrections to problems 8, 9 and 10 should only be performed by qualied
electrician or plumber. The person who initially installed the unit is the best one to
contact for help, or contact Marey for service.
19
TROUBLE-SHOOTING / DIAGNOSTIC CHART

NORMAL MAINTENANCE
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 unit
before servicing.
To ensure consistent water flow, the following is recommended:
1. Periodically remove build-up and dirt that may accumulate at the aerator of the
faucet or in the shower head.
2. Periodically clean the built-in filter screen in the inlet connection of your water
heater. Water supply must be turned off before cleaning the screen.
#4 or #9
#11
Arrows and
waves
indicate
waterflow
Campfire
indicates
power to
heating
elements
Fig. 16
20