·A 120 V / 60 Hz power source should be used. Fire, electrical shock or damage to the water
heater may occur if an incorrect power supply is used.
·This appliance is equipped with a three-prong grounded plug for increased protection against electrical
shock. Ensure the plug is properly inserted into a clean, dry outlet that complies with all electrical codes. Only
insert and remove the plug using the plug head and never use a wet hand to plug or unplug the power plug.
·Any alterations to the appliance will void the warranty unless instructed by a Marey technical
support representative with an original spare part supplied by Marey.
·Should overheating occur or the gas supply fails to shut off, turn off the manual gas control
valve to the appliance
·Do not use this appliance if any part has been under water. Immediately call a qualied service
technician to inspect the appliance and to replace any part of the control system and any gas
control which has been under water.
·Caution: Label all wires prior to disconnection when servicing controls. Wiring errors can cause
improper and dangerous operation.
·Verify proper operation after servicing.
06
2. OPERATION
Gas tankless water heaters provide an efcient reliable supply of hot water.
The temperature can be adjusted between 35°C - 60°C (95°F - 140°F).
Only a small amount of water and a low water pressure (15psi) are required for the unit. Unit requires 0.67
gpm (2.5 l/min) to enable the unit. Unit stays in operation until the ow drops below 0.53 gpm (2 l/min).
The burner ignition is electronic. The unit has no pilot light and consumes no gas when the
heater is not being used.
The unit’s integrated control system constantly monitors the temperature of the water being
produced and adjusts the burner accordingly to deliver a stable supply of hot water.
The unit is highly exible and provides hot water over a wide range of ow rates and incoming
water temperatures across the capacity range of the unit.
Keep the combustion air vent pipe location free of chemicals, such as chlorine or bleach, that
produce fumes. These fumes can damage components and reduce the life of your appliance.
Damage and repair due to scale in the heat exchanger is not covered by warranty.
Always check the water temperature before entering a shower or bath.
Do not adjust the parameter settings unless specically instructed to do so.
This Marey water heater includes convenient H
2
O Saver Technology™, a digital functionality that
allows owners to control hot water consumption and conserve water.
DESCRIPTION OF OPERATION
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