NEXT EVO OFT 11 - Water heaters and boilers Ariston Thermo - Free user manual and instructions
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| Product Type | Electric Water Heater |
| Brand | Ariston Thermo |
| Model | NEXT EVO OFT 11 |
| Capacity | 11 Liters |
| Dimensions (H x W x D) | 360 x 360 x 360 mm |
| Weight (empty) | 8 kg |
| Power Supply | 220-240 V / 50 Hz |
| Rated Power | 1500 W |
| Max Water Temperature | 75°C |
| Pressure Rating | 0.8 MPa (8 bar) |
| Heating Element Material | Copper or Stainless Steel |
| Installation Type | Wall-mounted, Vertical |
| Water Connection | G 1/2 inch |
| Safety Features | Overheat protection, Pressure relief valve, Thermal cut-off |
| Energy Efficiency Class | B (typical) |
| Standby Energy Consumption | 0.5 kWh/24h |
| Maintenance | Check anode rod annually; drain and flush every 6 months |
| Repairability Index | Moderate; replaceable heating element and anode |
| Spare Parts Availability | Anode rod, heating element, thermostat, gaskets |
| Warranty | 2 years (typical) |
Frequently Asked Questions - NEXT EVO OFT 11 Ariston Thermo
How do I reset the Ariston NEXT EVO OFT 11?
To reset the water heater, locate the reset button on the thermostat. Press and hold for 3 seconds. If it trips again, there may be an overheating issue. Check the water pressure and ensure the heater is not running dry.
Why is my water heater not heating?
Possible causes: tripped circuit breaker, faulty heating element, or thermostat malfunction. Check the power supply and press the reset button. If it still doesn't heat, test the heating element with a multimeter and replace if necessary.
How often should I replace the anode rod?
The anode rod should be inspected annually and replaced every 2-3 years, or sooner if it is heavily corroded. A worn anode can lead to tank corrosion and leaks.
What does the pressure relief valve do?
The pressure relief valve prevents excessive pressure buildup inside the tank. If the pressure exceeds safe levels, the valve opens to release water. Test it periodically by lifting the lever slightly; if it does not flow water, replace it.
Can I install the Ariston NEXT EVO OFT 11 outdoors?
No, this model is designed for indoor installation only. Exposure to rain, snow, or freezing temperatures can damage the unit and void the warranty. Install in a dry, frost-free location.
What is the recommended water temperature setting?
For energy efficiency and safety, set the thermostat between 55°C and 60°C. Temperatures above 60°C increase scalding risk and energy consumption, while below 55°C may promote bacterial growth.
How do I drain the water heater?
Turn off power and water supply. Attach a garden hose to the drain valve and route it to a floor drain. Open the drain valve and a hot water faucet to allow air in. Allow the tank to empty completely, then close the valve.
Why is there water leaking from the tank?
Leaks can occur from loose pipe connections, a faulty pressure relief valve, or a corroded tank. Check all fittings and tighten if necessary. If the tank itself is leaking, it may need replacement.
What is the difference between OFT and other models?
The OFT likely indicates a specific design feature such as a slim profile or enhanced insulation. Check the manual for exact details. Generally, Ariston Next Evo models offer efficient heating and compact size.
How do I clean the exterior of the water heater?
Use a soft, damp cloth with mild soap and water. Avoid abrasive cleaners or solvents that may damage the finish. Do not spray water directly onto electrical components.
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Product information
Brand : Ariston Thermo
Model : NEXT EVO OFT 11
Category : Water heaters and boilers