0504
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 first shutting off 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. All wiring and installation must be supervised by a qualified electrician.
4. CAUTION: This product has more than one power-supply connection point.
Disconnect 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.
6. This water heater MUST be permanently connected to a fixed circuit breaker.
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
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.
Requirements:
ECO180 - Two 220V Double Pole 50 amp breakers
ECO210 - Three 220V Double Pole 40 amp breakers
ECO240 - Three 220V Double Pole 40 amp breakers
ECO270 - Three 220V Double Pole 50 amp breakers
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
the center “power” button and try again.
Test water to prevent scalding.
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
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