NEXT EVO OFT 14 - Water heaters and boilers Ariston Thermo - Free user manual and instructions
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| Brand | Ariston Thermo |
| Model | NEXT EVO OFT 14 |
| Category | Water heaters and boilers |
| Product Type | Gas instantaneous water heater for domestic hot water |
| Energy Source | Natural gas (G20) or LPG (G30/G31) depending on configuration |
| Hot Water Flow Rate | 14 L/min at ΔT 25°C |
| Ignition | Electronic automatic spark ignition with continuous modulation |
| Heat Input | Maximum 27 kW (approximate value for 14L/min flow rate) |
| Gas Connection | G 1/2" |
| Water Connection | G 1/2" |
| Electrical Supply | 230 V AC, 50 Hz |
| Dimensions (H × W × D) | 580 × 350 × 200 mm (approx.) |
| Weight | 15 kg (approx.) |
| Display | Digital LED display for temperature and status |
| Safety Features | Flame failure device, overheating thermostat, anti-dry boiling protection, flue blockage sensor |
| Maintenance | Annual inspection of burner, heat exchanger, gas and water connections; cleaning of the water filter if installed |
| Repairability | Spare parts available for gas valve, thermocouple, electronic control board, and water valve; professional service recommended |
| Installation | Must be installed by a certified technician; must be connected to a flue and proper ventilation |
Frequently Asked Questions - NEXT EVO OFT 14 Ariston Thermo
What is the recommended installation location for the NEXT EVO OFT 14?
Install the water heater in a dry, well-ventilated room. It must be placed on a solid vertical wall at least 1 meter from a bath or shower area. The flue must be properly connected and vented to the outside. It should not be installed in a bathroom or room containing a shower, unless specific safety requirements are met. Always follow the installation instructions provided in the manual.
How can I adjust the hot water temperature?
Use the temperature dial or the digital control panel on the front of the heater to set the desired hot water temperature. The default range is typically between 30°C and 60°C. Wait a few minutes after adjusting to allow the heater to stabilize. For safety, avoid setting the temperature above 55°C if the heater is used by children or elderly people.
Why does the heater switch off during use?
The heater may switch off automatically due to a safety activation. This can be caused by a blocked flue, insufficient gas or water pressure, an overheating event, or a faulty flame sensor. Check the error code on the display and refer to the manual. If the problem persists, contact a qualified technician to inspect the heater.
What is the minimum water pressure required for operation?
The minimum water pressure for the NEXT EVO OFT 14 is typically 0.2 bar (20 kPa). It should not exceed 6 bar. If your water pressure is lower, the heater will not operate correctly and you may need a pressure booster. Always verify the supply pressure before installation.
Can the unit operate with LPG (butane/propane)?
Yes, the NEXT EVO OFT 14 can be converted to use LPG (G30/G31) but it requires a conversion kit and adjustment of the gas valve. This procedure must be done by a certified installer and the appropriate label must be attached. Do not attempt to use LPG without the conversion kit, as it will cause abnormal combustion.
How often should I service my water heater?
It is recommended to have your water heater serviced annually by a qualified technician. During service, the technician will inspect the burner, heat exchanger, ignition system, and safety devices. Regular maintenance ensures efficient operation, extends the lifespan of the unit, and warranties validity.
What should I do if the ignition fails?
First, verify that the gas valve is open and that the electrical power is connected. If you still hear a clicking sound but no flame, clean the igniter and check the flame sensor. If the problem continues, the control board or gas valve may be faulty. In that case, call a professional to replace the faulty parts.
How do I clean the burner and heat exchanger?
Cleaning the burner and heat exchanger should be done only by a qualified technician, usually during annual maintenance. If you are technically skilled, you can open the casing and vacuum the burner, then carefully brush the heat exchanger fins. Use only non-abrasive tools. Never clean these components while the unit is hot or powered on.
Is the device suitable for a bathroom installation?
No, this type of open-flue water heater (OFT) is not suitable for a bathroom, shower room, or any room containing a bathtub or shower. It consumes oxygen from the room and must be installed in a well-ventilated location. If you need to install it indoors, choose a condensing sealed chamber model, or ensure proper ventilation according to local regulations.
What spare parts are commonly replaced?
Common spare parts include the gas valve, thermocouple (flame sensor), ignition electrode, water flow regulator, and electronic control board. Most parts are user-replaceable but require special tools and expertise. Always use original spare parts to maintain safety and performance. Keep the warranty card for future reference.
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USER MANUAL NEXT EVO OFT 14 Ariston Thermo
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Product information
Brand : Ariston Thermo
Model : NEXT EVO OFT 14
Category : Water heaters and boilers