The ATMOR Electric Tankless Water Heater, part of the ThermoPro Series, is designed to provide hot water on demand for household and indoor use. Unlike conventional tank storage water heaters, this unit does not store hot water, offering significant energy savings by eliminating continuous energy waste from heating water idly in a storage tank.
The system operates by detecting hot water demand through a flow sensor when a hot water faucet is turned on. This activates high-power heating elements. Sensors continuously monitor the water flow rate and measure both incoming and outgoing water temperatures. This data is transmitted to the system's logic controls, which then determine the precise amount of power required by the heating elements to heat the water to the user's desired temperature.
Usage Features:
The water heater is activated by turning a knob clockwise, which also illuminates the digital display. To turn off the heater, the knob should be turned all the way counterclockwise. The output water temperature can be set by turning the knob while water is running through the heater. Turning the knob clockwise increases the temperature, while turning it counterclockwise lowers it. The temperature can be adjusted within a range of 90°F (30°C) to 122°F (50°C). A comfortable temperature for bathing and showering is typically between 98°F (37°C) and 105°F (41°C). The manufacturer recommends a setting of 118°F (48°C) for optimal hot water delivery at a maximum flow rate for all household needs.
It's important to note that all tankless water heaters are subject to a maximum flow rate. If this rate is exceeded, the heater may not be able to sufficiently heat the water. Since this unit heats water on demand, it is designed to heat to a lower temperature compared to conventional tank heaters, meaning less or no cold water mixing is needed to achieve a comfortable temperature. The incoming water temperature, which varies with seasons, can affect the hot water supply. During colder periods, it might not be possible to run multiple hot water outlets simultaneously as in warmer seasons, though back-to-back showers can be taken without waiting for water to heat.
A higher temperature setting is not recommended, as it can lead to severe scalding injuries, especially for children and elderly individuals, and also contributes to more scale buildup in water heating devices.
In freezing temperatures (below 32°F or 0°C), the heater should be protected from potential damage. The unit should be powered off at the main electrical panel's circuit breaker. A faucet should be opened slightly to allow water to flow continuously through the device at a very low rate, without heating. Power can be restored when normal temperatures return. If water inside the heater freezes, it can cause damage not covered by warranty. If freezing is suspected, the unit should not be turned on until the frozen water has melted and there are no leaks. Contacting a qualified electrician or the manufacturer for service in this situation is recommended.
Maintenance Features:
The water heater has minimal maintenance requirements. Regular inspection and testing for signs of damage, cracks, leakage, or weakness are recommended, and any issues should be addressed immediately. Connections should not be overtightened, as this can cause severe internal damage.
Higher water temperatures accelerate scale buildup. Therefore, plumbing connections on the water heater should be inspected annually for any signs of damage or failure. In areas with hard water (high mineralization), more frequent inspection and descaling of the water heater are necessary. Installing a manual shut-off valve on both the inlet and outlet of the water heater can facilitate flushing the unit with a descaling solution.
The filter on the water inlet pipe should be cleaned every six months by washing it lightly to remove any debris.
Whenever maintenance is performed on the water heater or the home's plumbing system that might introduce air into the pipes, it is crucial to power off the water heater and purge all air from the pipes before restoring power to the unit. Failure to do so can cause permanent damage to the heating elements and void the warranty.
If the unit needs to be reset, all power must first be shut off at the fuse or breaker box. The three reset buttons, located as shown in the manual, should then be pressed. If a "click" is heard, the unit has reset. If frequent resets are needed, customer service should be contacted for further assistance before turning the breakers and power back on.
The quality of water is a critical consideration for installation and maintenance. Water conditions that do not meet recommended levels can damage the water heater, and Atmor reserves the right to deny warranty claims for damage resulting from non-compliant water conditions. To prevent damage to the heat exchanger and heating elements, water treatment and regular flushing are necessary in hard water areas. Atmor recommends installing a water treatment device or water softener for optimal performance in such conditions.
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