ECO180 ECO240 ECO270 ELECTRIC TANKLESS WATER HEATER INSTRUCTIONAL MANUAL Keep this manual with you after your unit has been installed, you may need it for further technical information. USA (855) 627-3955 www.Marey.
Congratulations! You’ve just purchased a new Marey ECO tankless water heater and will soon begin to enjoy the benefits 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.
INDEX QUICK START GUIDE 04 WARNING 05 IMPORTANT WARNINGS 05 IMPORTANT SAFETY INFORMATIONS 05 PRODUCT FEATURES 06 PRODUCT ADVANTAGES 07 INSTALLATION DIAGRAM 07 TECHNICAL SPECIFICATION REQUIREMENTS 09 PRODUCT INNER STRUCTURE 10 INSTALLATION GUIDELINE 11 TROUBLE-SHOOTING/DIAGNOSTIC CHART 19 ELECTRICAL DIAGRAM 21 CUSTOMER SERVICE 23
QUICK START GUIDE ECO180 | 240 | 270 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.
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 water heater MUST be permanently connected to a fixed circuit breaker. 7. DO NOT install this water heater near volatile or flammable substances, near tinder wood or near a strong magnetic field. 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.
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 calculating function.
ECO240 / /ECO270 ECO240 = 3 x 40am 2-pole 208/240V Breakers ECO270 = 3 x 50am 2-pole 208/240V Breakers Fig. 03 High pressure discharge valve Ball valve/shut off valve Water in Water out Fig.
TECHNICAL SPECIFICATIONS AND INSTALLATION REQUIREMENTS PRODUCT CODE ECO180 ECO240 ECO270 Energy 18kW 27kW 27kW Minimum Required Circuit Breaker 2x50A 3x40A 3x50A Max. Amp. Load 75A 100A 112.5A 2x6 3x6 3x8 AWG Copper AWG Copper AWG Copper Min. Wire Size Voltage/Frequency 240V, 60Hz Water Connections 3/4” NPT Recommended Min. Flow Activation 0.85 GPM / 3.2 L/min Safe Operating Pressure 5 PSI - 85 PSI Dimensions Weight 11.0” x 16.1” x 3.5” 17.7 lbs 17.8 lbs 18.
PRODUCT INNER STRUCTURE 260mm Bottom Case ECO180 ECO180 Heating Chamber 285mm Control Board Display Screen Temp. Sensor E L1 L2 L1 L2 Flowmeter 260mm ECO240 / ECO270 Terminal blocks Bottom Case ECO240 / ECO270 Heating Chamber 285mm Control Board Display Screen Temp. Sensor E L1 L2 L1 L2 L1 L2 Flowmeter Terminal blocks Fig. 05 High pressure discharge valve Ball valve/shut off valve Water out Water in Fig.
INSTALLATION GUIDELINES 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 flammable substances, or near a strong magnetic field. The unit must only be mounted in a VERTICAL position near the water fittings. 3. Mount the unit to a flat section of walI, welI away from any potential water splashes or spray.
Fig. 07 Fig. 08 Fig.
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 of¼" diameter in the marked locations. If you are on a stud, screw the bracket directly into the wal I. 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.
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 affix 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.
Please use a backup wrench when installing water fittings. Connections are 3/4" NPT (Fig.13) Outlet Inlet Backup Wrench Rubber Washers Fig.13 Important notes about electrical connections: 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.
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.
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). Fig. 15 How the unit works 1. This unit heats water instantaneously as it flows across the heating elements. 2. The electronic control monitors the flow rate and the incoming water temperature and then switches on the required number of heating elements to reach the set temperature. 3.
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 off 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.
TROUBLE-SHOOTING / DIAGNOSTIC CHART PROBLEMS 1. Inlet and outlet fittings leaking POSSIBLE CAUSES CORRECTIVE ACTIONS A. Fittings not tight B. Rubber washer worn-out A. Power not connected. B. LCD damaged. C.LCD not connected to PCB. A. Tighten fittings. B. Change rubber washer. 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.
#4 or #9 #11 Campfire indicates power to heating elements Arrows and waves indicate waterflow Fig. 16 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.
ELECTRICAL DIAGRAM Thermal Cut-Out 90°C L1 T1 R1 T2 R2 L2 Control System L1' L2' E Outlet Temp. Sensor Display Screen Inlet Temp. Sensor Flowmeter Fig. 17 Thermal Cut-Out 90°C L1 T1 R1 T2 R2 T3 R3 L2 L1' Control System L2' L1'' L2'' E Outlet Temp. Sensor Display Screen Inlet Temp. Sensor Flowmeter Fig.
ECO180 Bottom case Heating Chamber Control Board Display Screen Temp. Sensor E L1 L2 L1 L2 L1 L2 Flowmeter Terminal blocks ECO240 / ECO270 Bottom case Heating Chamber Control Board Display Screen Temp. Sensor E L1 L2 L1 L2 L1 L2 L1 L2 Flowmeter Fig.
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, feedback and suggestions. U.S.A +1 (855) 627-3955 PUERTO RICO (787) 727-0277 customerservice@marey.com www.Marey.
