The temperature of the hot water that it produces will be affected by:
1. The model that you have installed. We offer a range of point of use electric tankless water heaters, and the heating capacity will vary between the models.
2. The temperature setting that you have selected. Depending on the model installed you will have either a circuit board with a temperature knob on it, or a mechanical flow switch that has a screw that can be loosened and slid to either "LO" or "HI".
Before removing the front cover to make adjustments, please isolate the water heater from the power supply by turning off the correct circuit breaker inside your breaker panel!
3. The flow rate of the hot water fixture that you are feeding from the water heater. In a tankless water heater the cold supply water is heated as it flows through the heating coil, and so the faster the water moves the less heat energy that it will be able to absorb from the heating elements.
If you have selected the highest available temperature setting but the output water temperature is too low for you, then you will need to reduce the water flow rate to allow more heat energy to get into the water before it leaves the water heater.
If your water flow needs are too high for the model that you have installed, you may need to consider a model that has a higher heating capacity.
4. Supply voltage. Each model has an electrical installation requirement that must be met, and if the supply voltage is less than the model requires this can result in a reduced heating capacity.
Example; The Bosch Tronic 3000 US9 model is rated for 240vac. It will work down to 208vac but will lose approximately 25% of its ability to heat the water.
For full performance capabilities and further information on adjusting the temperature, please refer to your product manual.
If you no longer have the manual, you can download a copy from this page