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5.4 Setting the IMPORTANT <br /> • While any hot water is being provided, the <br /> Temperature temperature setting can only be adjusted <br /> between 98°F and 110°F. <br /> This water heater requires a minimum flow • Check local codes for the maximum water <br /> rate to operate. This rate can be found on the temperature setting allowed when used in <br /> specification page in this manual. In some cases nursing homes, schools, day care cen- <br /> when you are not getting hot water or if the water ters, and all other public applications. <br /> alternates between hot and cold, it is due to the • If a newly installed water heater with a <br /> water flow being below or close to the minimum controller has not been powered for at <br /> flow rate. Increasing the flow rate should resolve least 6 hours then the temperature will re- <br /> these problems in these cases. turn to the default setting of 104°F (40°C) <br /> If you are experiencing issues with higher if power is interrupted. <br /> temperature settings, then reduce the • There may be a variation between the <br /> temperature setting. Selecting a temperature temperature displayed on the temperature <br /> closer to that which is actually used at the faucet controller and the temperature at the tap <br /> will increase the amount of hot water being due to weather conditions or the length of <br /> delivered to the faucet, due to less cold water pipe to the water heater. <br /> mixing at the fixture. The controller buttons shown below are located <br /> on the outside front panel for internal (indoor) <br /> ADANGER water heaters. <br /> For external (outdoor)water heaters, open the <br /> front panel to access the controller buttons. <br /> till 1. If the water heater is off, press the "On/Off' <br /> 1 button to turn on. <br /> IT^ 2. The "Priority" button enables a controller if <br /> i I multiple controllers are being used. If the <br /> "Priority" light is off, then press the "Priority" <br /> button on the temperature controller. The <br /> orange "Priority" light will glow indicating that <br /> this controller is controlling the temperature <br /> Water temperatures over 125°F (52°C)can and that the water heater is ready to supply <br /> cause severe burns or scalding resulting in hot water. The priority can only be changed <br /> death. while no hot water is running. <br /> 3. Press the A (Up)or V (Down) buttons to <br /> Hot water can cause first degree burns with obtain the desired temperature setting. <br /> exposure for as little as: All hot water sources are able to provide <br /> water at this temperature setting until it is <br /> • 3 seconds at 140°F (60°C) changed again at this or another temperature <br /> • 20 seconds at 130OF (54°C) controller. <br /> • 8 minutes at 120°F (49°C) *Fpc o In Use <br /> Children, disabled, or elderly are at highest risk <br /> of being scalded. Appra Wd-T-V. <br /> Feel water before bathing or showering. <br /> - o Priority <br /> Hot water temp <br /> aOn/Off <br /> Figure 74 <br /> Rinnai Tankless Water Heater Installation and Operation Manual 74 <br />