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Frequently Asked Questions

General

  • Instant water heaters do not require pre-heating; they deliver hot water instantaneously. They are typically more compact-looking as they do not have a storage tank.
    • Single-point instant water heaters operates with a 3.3kW heating element and are best suited for individual supply points. For example, you would require two separate instant water heaters for two separate bathrooms. 
    • When there is a water interruption within the household water pipeline, users experience reduced shower comfort due to lower water pressure and sudden fluctuations in water output temperature and flow rate. This leads to water wastage and increased power consumption as users continuously adjust the temperature setting to maintain the desired water output temperature.
    • The majority of Ariston instant water heaters are equipped with Constant Temperature technology feature, ensuring that the water output temperature remains stable regardless of variations in the incoming water flow rate or temperature. Read here to find out more about Constant Temperature.
    • These units typically have an average lifespan of around 3 to 5 years.

 

  • Storage water heaters come with an inner tank that stores hot water. These tanks are available in different capacities, ranging from 15 to 100 litres, and they require pre-heating before supplying hot water.
    • Typically, storage water heaters are capable of providing hot water to various outlets, making them well-suited for simultaneous use in multiple bathrooms and even in the kitchen. The SL2 LUX-D WI-FI and AN2 TOP WI-FI series are equipped with Titanium heating element, offering the highest protection against corrosion and scale deposits, backed by a lifetime warranty. 
    • To conserve energy and prevent heat loss, there's insulation between the storage tank and the outer casing of the heater, and the inner tank can be made of stainless steel or have an enamel coating.
    • Storage water heaters come with an automatic thermostat that cuts off the power supply when the water reaches the pre-set temperature, minimizing additional electricity consumption for maintaining hot water throughout the day. 
    • On average, storage water heaters have a longer lifespan, typically ranging from 5 to 7 years.

If you switch off the product by ON/Off button, the ECO function continues to maintain memory.

If you stop the electricity of the product, the ECO function continues to maintain memory for 2 hours.

Water Heaters - Performances

Formula for calculation of electricity consumption:

Electricity cost = Power (kW) x Usage Time (hr) x Electrical Tariff

The following is a simple illustration of the consumption of 2 types of heaters on the basis of 2 users.

Assumption:
User 1 & 2 – uses 5 minutes of hot water each
User 3, 4 & 5 – uses 3 minutes of hot water each
Total: 19 minutes hot water required
Electrical tariff (dated Oct – Dec 2023) – S$0.287

Electricity Consumption:
Instant water heater : 3.3kW x 19/60 x S$0.287 = S$0.300
Storage water heater : 1.5kW x 70/60 x S$0.287 = S$0.502

The above calculation does not take into consideration of other factors such as capacity of water heater, frequency of bath per user and original temperature of water in the tank.

For instant water heater, the recovery of hot water is instant.

The recovery rate for storage water heater varies according to the power of the heater.

Initial recovery rate:
a) Inlet temperature = 25 deg C
b) Bathing temperature = 42 deg C

Recovery rate gallon/hour (Small capacity – 1.5kW )
= Andris2/Andris Lux WI-FI/ Andris LUX-D WI-FI/ Andris 2 TOP WI-FI (1500 x 860) / (42-25) x 60
= 1.3 litres / min

Recovery rate gallon/hour (Bigger capacity – 2.5kW)
= Andris Slim (SL2) / PRO1 R Inox/PRO R Slim / PRO RS J (2500x 860) / (42-25) x 60
= 2.1 litres / min

The following is a simple illustration on how to size and select a proper water heater.

Assumptions:

  1. Normal bathing temperature = 40 deg C.
  2. Cold water inlet temperature = 25 deg C.
  3. Ariston maximum temperature setting = 70 deg C.

 

Calculation of % of hot water required when mix with cold water:
[(mixed water) – (cold water)] / [(hot water) – (cold water)]
= [40 – 25] / [70 – 25]
= 15 / 45
= 33% of mixture is hot water (for Ariston heater)

Amount of mixed water produced at temperature 40ºC:

Ariston ( 30 litres ):
33/30 = 100/x
x = 91 litres

Ariston ( 50 litres ):
33/50 = 100/x
x = 152 litres

From the sizing program, we understand that the amount of the warm water (40 deg C) produced for bathing is not only depended on the capacity of the tank but also the pre-set temperature.

The following may be used as a reference guide in determining a proper storage water heater for your home:

  1. Usage Description / per bathroom: Sink
    Proposed Ariston model: ANDRIS LUX WI-FI 15, Andris2 15 series.
  2. Usage Description / per bathroom: Shower & basin
    Proposed Ariston model: ANDRIS LUX WI-FI 30, Andris2 30 series, Andris Slim series, PRO R S 30, PRO R S 40, PRO R S 56, PRO1 R Inox series, PRO RS J series.
  3. Usage Description / per bathroom: Bathtub & basin
    Proposed Ariston model: PRO R S 80.
  4. Usage Description / per bathroom: Corner bathtub & basin
    Proposed Ariston model: PRO R S 100.

Routine preventive maintenance of water heater can provide you many years of trouble-free use. Here are several points you should take note of:

  1. Keep the area around the water heater free from gasoline or other flammable or combustible materials.
  2. It is not uncommon for water heaters to generate a hissing noise during operation, even for new heaters. However, if the hissing or noise level increases substantially, contact your professional plumber or our service center, as this noise may be caused by the heating element, which requires cleaning.
  3. The purpose of the magnesium anode is to neutralize stray galvanic currents, preventing corrosion. Therefore, it is advisable to replace the magnesium anode in the ANDRIS2 / ANDRIS LUX WI-FI / Andris LUX-D WI-FI series, SL2 series, PRO R SLIM series, PRO1 R INOX series, and PRO RS J series regularly, e.g., yearly. Please call our service center for this service with a charge.

Ariston Net App

The Ariston NET app empowers you to control your product remotely, no matter where you are. This means you can easily switch ON/OFF, change temperatures, and stay informed in real-time about everything happening with the product – all at your fingertips, from anywhere.

It's the simplest way to manage your product, saving you energy and money, with potential savings of up to 25%.

You can download the free Ariston NET app from any smartphone app store, such as The Apple Store and the Google Play Store. Ariston NET is available for both iOS and Android operating systems.

If you've forgotten your password for accessing the service, follow these steps:

 

  1. Navigate to the “Login” section of the app.
  2. Request a password reset to be sent to your email address.
  3. A new password will then be sent to your email address.

If you change your router, follow these steps:

  1. Repeat the network configuration procedure.
  2. Refer to the installation manual and quick start guide included for guidance.

The Ariston NET App allows the multi-plant control. Look for the button in the settings app page.

Yes, more than one user can log in from different devices with the same account. Download the app and use only one account username and password.

Yes, more than one user can log in from different devices with the same account. Download the app and use only one account username and password.

Your product will not be lost. It will automatically reconnect to the Wi-Fi network as soon as the power is restored.

Storage Water Heaters

Instant Water Heaters

1) Power supply failure?
Check incoming power supply to the heater and ensure selector knob is at “ON” mode.

2) Insufficient water flow rate to activate flow switch/ sensor?
Refer to problem on “low flow rate”.

3) Defective components?
Replace components.

4) Heating/ELCB/Safety check indicator “blinking” or “not lighted”? 

Call for service.

5) Overheating , due to higher inlet water temperature?
Adjust the temperature settings higher.

1) Stop cock valve is at close position?
Open stop-cock valve to fully open position.

2) Low water pressure at the inlet?
Ensure that 0.15 bar of minimum water pressure.

3) Mesh filter is jammed?
Remove and clean up mesh filter.

4) Debris in hand shower, twisted flexible hose?
Descale the hole with a soft brush.

If you switch off the product by ON/Off button, the ECO function continues to maintain memory. 

If you stop the electricity of the product, the ECO function continues to maintain memory for 2 hours.

There are three safety features:

  1. Thermostat
    The thermostat is the first-level safety feature, providing precise control of water temperature by the user. It stops the heating process when the desired temperature is reached.

  2. Thermal cut-out
    In the event of over-heating or thermostat failure, the thermal cut-out serves as the second sensor, initiating an all-pole disconnection from the electric supply to prevent further risks.

  3. Pressure relief valve
    Directly fitted in the inlet, the pressure relief valve prevents excessive pressure in the water tank. If the pressure exceeds 8 ± 0.5 bars, the valve releases pressure by depressing the spring, causing water to drip through the 4.5mm outlet. Ensure that this outlet is connected to the drainage system.

1) Thermostat is not fitted properly on the heating element?
Remove and re-fit it correctly.

2) Thermal cut-out activated?
Reset the safety device.

3) Electric switch not ON?
Ensure the electric switch is turned ON.

4) Electric heating element cut-off or short-circuited?
Replace the heating element and the gaskets.

5) No power supply?
Verify the continuity on the power supply cables and connection terminals.

1) No power supply?
Check the continuity of the power supply cables and connection terminals.

2) Defective thermal cut-out?
Replace thermal cut-out.

3) Defective electronic card?
Replace electronic card.

  1. Defective thermostat?
    Replace the thermostat.
  2. Too much calcium or mud on the tank?
    Remove the calcium or mud.

1) Bacteria in the water?
Drain, clean and rinse the inner tank.

2) Water temperature is too low?
Turn the thermostat to “maximum”.

1) Excessive formation of lime or scale on the heating element?
Clean the heating element.

2) Thermal effect on the current thermostat?
No action should be taken if this occurs at the end of the heating cycle. However, if it occurs at the beginning of the heating cycle, replace the thermostat."

1) Hard water.
Descale.

2) Natural effect due to micro-boiling of the water over the heating element.
Replace the heating element with anti-noise model.

  1. Hard water.
    Descale.
  2. Natural effect due to micro-boiling of the water over the heating element.
    Replace the heating element with anti-noise model.

1) Incorrect electrical power setting.
Check the power setting, modify the protection.

2) Resistance is earthed.
Test it and if necessary, replace it.

Defective valve or too much pressure.
Replace or install pressure reducer.

Boiler perforation due to corrosion by aggressive water.
Replace water heater.

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Terms and Conditions

Guarantee

The User, as a consumer and user, enjoys guarantees on the products that he has acquired, in the legally established terms for each type of product, responding Ariston Thermo España, SL, therefore, for the lack of conformity of the same that manifest within a period of three (3) years from the delivery of the product.

The legal warranty conditions for the third year will only be valid for products purchased from January 1, 2022, with the application of the new warranty law, in accordance with the provisions of Royal Legislative Decree 7/2021, of 27 of April, (hereinafter “Consolidated Text of the General Law for the Defense of Consumers and Users, or LGDCU”). The warranty conditions applicable to the commercial warranty or warranty extension period are those described in the documents attached to the product; warranty certificate and product installation manual.

In no case will the data that is recorded at the time of product registration be given by officials. The User must always have an installation invoice or a document accrediting the date of start of operation of the product, which will be the date taken as the start date of the guarantee.

Warranty Extensions

WARRANTY EXTENSION With this YOU GET:

  • FIVE YEARS of total coverage for labor and travel in all interventions carried out by SATO as a result of a product failure, from the date of purchase.
  • FIVE YEARS of total coverage of original spare parts used during interventions carried out by SATO as a result of a product failure, from the date of purchase.
  • FIVE YEARS against any corrosion defect produced in the boiler in models with Protech anode (impressed current) and FIVE YEARS in magnesium models.

 

With the following CONDITIONS:

  1. The conditions and limitations established in the Warranty Certificate are complied with.
  2. The product is installed in accordance with current regulations and what is established in the installation manual of the device.
  3. The product must be installed and connected to all supplies.
  4. The maintenance of the magnesium anode has been carried out according to the standards described in the instruction booklet. Especially for products NOT EQUIPPED with the PRO TECH electronic anode whose maintenance must be done every two years.
  5. Repairs during the warranty period must be carried out exclusively by personnel from our official ARISTON technical services.
  6. In products equipped with a Protech anode, if the defect consists exclusively in a perforation of the boiler, the technical service will process the replacement of the same for a new one of the same type, with all the derived expenses (assembly and disassembly) being paid by the User once total coverage has expired and is within the boiler coverage period.
  7. Any failure will be notified to ARISTON THERMO ESPAÑA, SLU to be able to manage with the corresponding SATO.
  8. The defect must be brought to the attention of the SATO within eight days of its knowledge.
  9. The defect must be recognized as such by an official technical service for ARISTON THERMO ESPAÑA, SLU
  10. In the case of replacement of the product, due to coverage of its warranty extension, a new warranty period will not start on the new product, the reference date being the start date of the first product.
  11. The request for the warranty extension must have been made during the first 15 days after the purchase of the product.
  12. The registration of the warranty extension must be processed with the data of the User who owns the product.
  13. The warranty extension must have been validated by ARISTON THERMO ESPAÑA, SLU

 

LIMITATIONS

This equipment is used to produce domestic hot water at a temperature below boiling point, this guarantee will only be valid in that application. Any other different use is not allowed, especially the use of the device in industrial cycles and/or installation in environments with corrosive or explosive atmosphere is not foreseen.

No warranty is given regarding normal wear and tear of the Product. In relation to expendable or consumable parts, components and/or materials such as batteries, light bulbs, magnesium anodes, etc. The provisions of the documentation that accompanies the product, where appropriate, will be followed.

The guarantee does not cover those cases in which the product: (i) has been subject to improper treatment; (ii) has been repaired, maintained or tampered with by an unauthorized person or (iii) has been repaired or maintained with non-original parts. Likewise, the guarantee will not cover those non-conformities of the product that have their origin in: (i) problems related to any of the supplies to which the product is connected (water, electricity, gas or other similar), such as an excess or pressure or voltage defect, or inadequate gas supply (ii) due to ice (iii) due to meteorological causes (in case of storms), lightning or floods (iv) surges (v) electro-magnetic contamination,

IMPORTANT – THIS WARRANTY IS VALID FOR THE WHOLE SPANISH TERRITORY WITH THE EXCEPTION OF THE CANARY ISLANDS, WHERE THE WARRANTY IS COVERED BY LOCAL DISTRIBUTORS. WARRANTY EXTENSION CONDITIONS ONLY VALID FOR INSTALLATION AT THE ADDRESS SPECIFIED IN THIS DOCUMENT.

DO NOT FORGET TO KEEP THE PURCHASE CONTRACT AS PROOF OF OBTAINING THE WARRANTY EXTENSION OF YOUR PRODUCT.