RANEIN Natural Gas Tankless Water Heater - User Guide

1. Instantaneous Water/Gas Flow Query

When running: Press and hold the "function key" for 3 seconds to query the instantaneous water flow. The "water flow L/min" icon will light up. The system will automatically exit if there is no operation within 5 seconds.

Within 5 seconds: Press the "function key" again to query the instantaneous gas flow. The "water flow m³/h" icon will light up. The system will automatically exit if there is no operation within 5 seconds.

1. Cumulative Water/Gas Flow Query

Stop running: Press and hold the "function key" for 3 seconds to query the cumulative water flow. The "water flow L/min" icon will light up. The system will automatically exit if there is no operation within 5 seconds.

Within 5 seconds: Press the "function key" again to query the cumulative gas flow. The "water flow m³/h" icon will light up. The system will automatically exit if there is no operation within 5 seconds.

2. Four Seasons Temperature Function

Touch the function button to select the four-season temperature icon to enter the mode. The control system will automatically match the water temperature according to the inlet water temperature. Manual adjustment is not possible in this mode. To manually adjust the temperature, you must first close the intelligent bath function by clicking the button.

Automatic matching temperature:

• Inlet water temperature <15°C: Matches outlet water temperature to 45°C.
• Inlet water temperature 16°C-21°C: Matches outlet water temperature to 43°C.
• Inlet water temperature 22°C-27°C: Matches outlet water temperature to 40°C.
• Inlet water temperature ≥28°C: Matches outlet water temperature to 38°C.

3. Kitchen Function

Touch the function button to select the kitchen icon to enter the mode. The default temperature is 38°C. Short press the function button again to select other functions or adjust the temperature using the ascending and descending keys. This will exit the function.

4. Bathtub Function

Touch the function button to select the bathtub icon to enter the mode.

• A. Open the bathtub function. The "888" and "L" icons will flash, corresponding to water injection.
• B. Within 5 seconds, press the ascending and descending temperature keys to adjust the bathtub water injection. The adjustment range is "50-800L".
• C. Single adjustment is in 50L increments. After 5 seconds of no operation, the display will show the temperature and the water injection will begin according to the current setting.

After the water injection is completed, a long buzzer warning will sound, and the water will turn off automatically.

At this time: Touch the mode selection buttons [up/down arrows] to change the amount of water added.

After 5 seconds: Touch the mode selection buttons [up/down arrows] to change the temperature of the water addition.

Touch the mode selection button again to exit.

5. High-Temperature Lock Function

1. To prevent scalding from high-temperature water, the machine is equipped with a high-temperature lock function. When the machine is running and the water temperature needs to be set above 50°C, long press the temperature key for 3 seconds to unlock. After 5 seconds of adjustment completion, it will automatically lock. Once locked, the temperature cannot be increased; only decreased. To increase the temperature again, long press the key for 3 seconds to unlock before setting the temperature. The process of decreasing the temperature is not restricted.

2. The high-temperature lock function is not available in standby mode.