Summary of Contents for Ariston VLS Flat 50. Page 1 Technical Manual Storage Electric Water Heaters - VLS Date of issue: 29 July 2011 Updating date: 10 November 2011 Version: v_2-1 Because of continuing product improvements, Ariston Thermo reserves the right to change specifications without prior notice. The display lights up the AUTO symbol 4 2 2 Slope from 0_2 to 0_8 (low temperature) from 1_0 to 3_5 1_5 (high temperature) °C 100 3.5 3.0 2.5 2.0 If the external sensor is used, the boiler calculates the 90 1.5 most suitable heating flow temperature taking the external 80 temperature and the type of 1.2 appliance into account. 70 1.0 The type water temperature. The new value will be indicated on the display It's possible to increase the temperature up to 65 °C To set the water temperature from 35 to 48 °C press the + button repeatedly. Pressing and releasing will trigger a rise of 1 degree Celsius. From 48 to 65 °C see the table. WARNING!! Water with a temperature higher than 50° A water heater temperature & pressure relief valve discharge pipe is sometimes called an overflow pipe. Beyond safety, energy saving is a great reason to adjust it to 120 degrees. According to the calculations by the DOE, you lose up to $60 annually in standby heat losses and $400 in demand losses. The bottom line, keep the temperature at If the problem continues, clean the filter, flush and descale the exchanger. Lastly, call your contractor to see if there's a problem with the sensor. 5. Temperature Fluctuations. Also known as the "c old water sandwich," this dilemma is one of the most common tankless water heater problems. Manage and control your Ariston products easily and wherever you are: Set a schedule. Change operation mode. Control your heating and hot water temperature. Adjust your indoor temperature based on your location. Ensure your heating is on only when you need it. Run hot water at the tap closest to the water heater for at least three minutes. Fill a glass and check the hot temperature. If the water is above 120 degrees, adjust the dial, wait about three hours and check again. Repeat until your water temperature reads 120 degrees. For a final test, check the water heater temperature the following morning Adjust the dial on the upper thermostat to the minimum setting while you set the other thermostat to the highest level. Head back to the terminal 1 and red wire of the bottom heating element. Place a probe on both of them to detect power. If it reads 240V, then there is power in the setup. DArd.