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1. General Outline of Appliance
1-1 Features
1. High-performance & high-capacity water heater features
• Stable heating and supplying from 0.58 to 5.8 GPM with the proven temperature control
method combining the feed forward, feedback and water flow control.
• Design to reduce water temperature drops to hold temperature variation upon re-feeding
• Maximum flow rate of 5.8 GPM (22 L/min) allowing simultaneous hot water supply for
the kitchen and shower.
2. Environmentally-conscious and low NOx exhaust
•The rich-lean design of the combustion burners allows the value of NOx to be lower
than 55 ppm.
3. Self-diagnostic function
• Detects the scale-clogging of the heat exchanger assembly (warning).
• Detects the blocked exhaust system (alarm).
4. Improved reliability
•The potted PCB (Printed Circuit Board) and connectors equipped with retainers have
greatly improved the reliability of the electronic components.
5. The PCB has a function to let the LED flash upon heater trouble and the
remote controller has an error-display function.
6. With ultra-low power consumption, the optional remote controllers have
highly visible display (equipped with a backlight). The main remote controller
and the bath remote controller are different in design.
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