Marey ECO070 User manual

Keep this manual with you after your unit has been installed, you
may need it for further technical information.
ECO070
ELECTRIC TANKLESS WATER HEATER
INSTRUCTIONAL
MANUAL
USA [phone] PR [phone]www.Marey.com

Congratulations! You've just purchased a new Marey tankless water heater and will soon
begin to enjoy the benets of "going tankless."
Take the time to thoroughly read and understand this safety and installation manual in its
entirety before you attempt to install your new ECO070 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
WARNING
IMPORTANT SAFETY INSTRUCTIONS
PRODUCT FEATURES
ELECTRICAL DIAGRAM
TECHNICAL SPECIFICATION
PRODUCT INNER STRUCTURE
INSTALLATION GUIDELINE
INSTALLATION METHOD
OPERATING INSTRUCTIONS
TROUBLE-SHOOTING
NORMAL MAINTENANCE
CUSTOMER SERVICE
04
04
05
06
06
07
07
08
10
11
11
12

This is not a do-it-yourself project. Failure to have this appliance installed by a licensed
plumber and electrician will void all warranties.
Under no circumstances should you attempt to install, repair or disassemble the MAREY
tankless electric water heater without rst shutting off all power to the unit directly at the
circuit breaker box.
Installation of this product is restricted to indoor locations and should only be installed by
licensed plumbing or electrical contractors.
WARNING
1. The installation must be in compliance with the National Electrical Code and your local
electrical and plumbing codes.
2. This appliance must be GROUNDED.
3. All wiring and installation must be supervised by a qualied electrician.
4. CAUTION: This product has more than one power-supply connection point. Disconnect all
power supplies before servicing.
5. This appliance is not intended for use by persons (include chitdren}with reduced physical
sensory or mental capabilities, or lack of experience and knowledge, unless they have been
given supervision or instruction concerning use of the appliance by a person responsible for their
safety. Children should be supervised to ensure that they do not play with the appliance.
6. This appliance MUST be permanently connected to the xed circuit breaker and it must be
installed vertically. DO NOT install this appliance near a pile of tinder or strong magnetic eld.
7. This appliance MUST NOT be switch on if you think it may be frozen, as this could result in
serious damage to the unit. Wait until you are sure that it has completely thawed out before
you switch it on.
8. Please feel the outlet hot water temperature with hand to make sure it is suitable for
showering before taking shower to avoid getting scalded.
9. Before connecting pipes to the water heater hoses, it is extremely important to FLUSH the
pipes to wash away all plumbing paste or residue in the pipes.
10. The heating chamber is treated with composite nano insulation material; it is natural if
there might be a bit of smell or green blue smoke when the unit is used for the rst time.
IMPORTANT SAFETY INSTRUCTIONS
04

The MAREY tankless electric water heaters are built national patent technology with
multi-safety devices.
Also, the unit has the following features:
1. Tankless, instantaneous heating for on demand hot water, No pre-heating. No stand-by
heating loss. Energy-saving.
2. Micro-computer control, adopting patent heating technology. Water is completely separated
from electricity by multi-layers of composite nano insulation material.
3. Over temperature protection: when the ouUet water temp. reaches over 162°F/72°C. the
electricity will be cut off to avoid getting scalded and the screen displays E1. the appliance will
start to work automatically after the while temperature drop to the setting temperature.
4. Malfunction of sensor-when there is malfunction with the temperature sensor, the heater
stops working and displays E3
5. Conversion between degree Fahrenheit and degree Celsius.
These units use SMART technology, which means that the units read the incoming water
temperature and the ow rate of the x.lure being used, and applies only the power
necessary to heat the water to your desired set point. This allows the unit to be very
efcient, and not waste power by only heating the water that is being used.
05
11. If there is damage to the wiring, you must contact qualied electrician to replace it.
12. CAUTION: FOR HOUSEHOLD ANO INDOOR USE ONLY
13. CAUTION: Risk of electric shock ,CONNECT ONLY TO A CIRCUIT THAT IS PROTECTED BY
GROUND-FAULT CIRCUIT INTERRUPTER (GFCI).
14 .Save this instruction booklet.
PRODUCT FEATURES

06
Thermal Cut-Out 90°C
Control
System
T2
R2
T1
R1
Display
Screen Inlet Temp. Sensor
Flowmeter
Outlet Temp. Sensor
REMARK: R: HEATING SYSTEM T: TRIAC
L1
L2
E
ELECTRICAL DIAGRAM
TECHNICAL SPECIFICATION
Voltage
Power
Min. Required
Circuit Breaker Size
Recommended Wire Size
Min. Water Flow
to Activate the Unit
Max Water Flow Rate
Water Pressure
Water Connections
Weight
Dimensions
PRODUCT CODE ECO085
8 AWG
0.40 GPM - 1.5±0.3L/min
3.0 GPM - 11.3 L/min
[2.9 - 87] PSI
½ NPT Brass
6.28 lb - 2.85 kg
11" x 10.2" x 4.5"
220-240V
8.5kW
30A
Note: *suitable recognized strain
relief means shall be provided
when the product is installed.
ECO085 | GPM
4.1
2.3
1.6
1.2
45
55
65
77
FLOW RATE
(GPM)
TE MP. R I SE
(ºF)
Temp. Increase per GPM

PRODUCT INNER STRUCTURE
07
INSTALLATION GUIDELINE
The installation must be in compliance wilh the National Electrical Code, your local electrical
and plumbing codes.
1. Make sure the appliance is intact, and lhe ttings are secure.
2. Please make sure the main power supply, water pressure, grounding condition, eleclrical
breaker and wire reach the standard of installation requirement.
3. The appliance must be connected to a properly grounded dedicated circuit of proper
voltage rating. Ground must be brought to the ·grounding bar' at the circuit breaker panel.
4. This appliance MUST be permanently connected to the xed circuit breaker. If you don't
use the heater. please switch off the circuit breaker.
5. DO NOT inslall this appliance near tinder or a strong magnetic eld. The unit must only be
mounted in a VERTICAL position near the water ttings. Please electrify the machine after
getting through wateiway.
Heating element
Power cord
Terminal block
Thermostat
Transformer
Switch
PCB protector cover
Flow sensor
Inlet
Outlet
Outlet temp. sensor
Inlet temp. sensor

08
INSTALLATION METHOD
Fixed installation on the wall
Locate an appropriate place on a section or wall as above mentioned.
Fig. 01: Front and back of the appliance
Fig. 02: Mark two mounting holes on the wall according to the following picture, then drill
two holes of 6.00mm diameter. Put expansion bolts in the holes, screw self-tapping-screw
into expansion bolts, then x the water heater on the installation screws.
Fig. 01
Fig. 02

09
Fig. 03: Connect the waler pipe lo the waler inlet and water outlet connections, please
remember to install the rubber seal ring.
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 waler
lo remove any debris or loose particles before connecting to the unit.
3. To ensure compatibility with the model, use only 1/2" NPT water connection ttings.
4. Please remember lo install rubber seal rings at the connections. When all water
connections are completed, check for leaks and take corrective action before proceeding.
Electrical connections
1. All electrical work must comply with national and applicable state and local
electrical codes.
2. All units must be connected to a properly grounded dedicated circuit of proper
voltage rating.
3. EC070 must be protected by a double pole breaker.
Outlet Inlet
Water connections
Fig. 03

10
1. Open water faucet for a few minutes until water ow is continuous and all air is purged
from water pipes.
2. Turn on the circuit breaker to bring electrical power to the unit.
3. The range or options for the temperature setting is 30-60°C/86-140°F.
4. When the unit is ON, but not working, lhen turn the unit on and off 3-4 times to convert
the temperature display between F ahrenheil and Celsius.
5. Centigrade display: when the setting temperature is 45°C, outlet hot water temperature
will be 45°C; Fahrenheit display: when the selling temperature is 113°F, outlet hot water
temperature will be 113°F. When you set the setting temperature, LED display screen will
twinkle 3 seconds; the temperature switched automatically to real-time temperature.
6. When the unit is ON, the LED display screen will display the actual temperature, if it does
not start working for 30 seconds, the screen will switch to the screen saver mode, the LED
display screen will be off. When you touch the knob switch, the LED display screen will light
up again and display the actual temperature again.
7. There is an overheat protection function for the appliance, if the outlet temperature
reaches 72°C/162°F, the LED display screen will display E1, the appliance will decrease the
power level automatically. After the hot water temp. drops to 55°C/131°F, the unit will begin
to work again. If this happens repeatedly then you should reduce lhe setting temperature.
8. The dry heat protection temperature is 90°C/194°F, water heater is with manual reset
unipolar protector
9. There is an automatic memory function to avoid repetitive adjustments. When you turn on
the appliance, the default set temp. will be the same as last time used.
4. Please make sure the wiring and the terrnirial blocks touch completely and are
secure. Also, lighten the screws completely on the terminal blocks to make sure lhe full
current can go through.
5. Before beginning any work on the electric installation, be sure that main breaker
panel switch is OFF to avoid any danger of electric shock, all mounLing and plumbing
must be completed before proceeding with electrical hook-up.
OPERATING INSTRUCTIONS

11
TROUBLE-SHOOTING
1. Inlet and outlet
ttings leaking
3. Functional keys
not working
6. Outlet gets water
smaller and smaller
2. LED not coming on
4. Water too hot
5. Water too cold
7. LED displays E1
8. LED displays E3
A. Fittings not tight
B. Rubber washer worn-out
A. No water ow from xture.
B. Water ow too low.
C.PCB damaged.
A. Too high temperature
set point
B. Water ow too low.
Inlet strainer or shower
clogged.
A. Power not connected.
B. LCD damaged.
A. Low temperature set point.
B. Water ow too high.
Outlet temp. is over
72°C/162°F
Temperature sensor failure
A. Tighten ttings.
B. Change rubber washer.
A. Open valve to get water.
B. Open valve to get pressure.
C. Change key or PCB.
A. Set a lower temperature.
B. Open valve bigger.
Clean strainer and shower.
A. Connect power to the unit.
B. Change LCD.
A. Set a higher temperature.
B. Reduce water ow.
A. Reduce the temperature.
B. Turn up the water ow.
Please contact with your local
dealer.
7 and 8 should only be performed by qualied electrician. The person who initially installed
the unit is the best one to contact for help.
Note: Do not attempt to repair this water heater yourself. Call a service person for assis-
tance. Always turn off of these operations the power supply needs to be shut off.
It is not required any regular maintenance. However, to ensure consistent water ow, it is
recommended following maintenance.
1. Periodically remove scale and dirt that may build up at the aerator of the faucet or in the
shower head.
2. There is a built-in lter screen at inlet connection which should be cleaned from time to
time. Please turn off the water ow before doing this.
PROBLEMS POSSIBLE CAUSES CORRECTIVE ACTIONS
NORMAL MAINTENANCE

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[phone]
U.S.A
[phone]
PUERTO RICO
Please feel free to contact us if you have any questions about our
products, warranty service, or if you need assistance installing a unit.
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