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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.
