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Ariston NUOS - User Manual

Ariston NUOS
120 pages
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Table of Contents

Questions and Answers

  • S
    Samuel BrownAug 13, 2025
    What to do if Ariston Water Heater water is boiling?
    • K
      Karen GarciaAug 13, 2025
      If the water from your Ariston Water Heater is boiling, with steam coming from the taps, the following could be the reason: * High level of scaling of the boiler and components. To resolve this, turn off the power, drain the unit, remove the sheath of the resistance and remove lime scale inside the boiler, being careful not to damage the enamel of the boiler and the sheath resistance. Repackage the product as in the original configuration; it is recommended to replace the flange gasket. * Probe error. Check for the presence of error code E5.
  • K
    Kayla SmithOct 27, 2025
    Why is the water from my Ariston NUOS coming out cold?
    • C
      Carol DanielOct 27, 2025
      If the water from your Ariston Water Heater is cold or not warm enough, here are some things to check: * Make sure the temperature setting isn't too low. Try increasing it. * Check the display for error messages and follow the instructions for those errors. * Verify that the heater is properly connected to electricity by checking the voltage at the terminals and inspecting the cables for damage or loose connections. * If you're using an HC/HP signal cable, try 'Boost' mode to see if that works, and then check the cable and meter connections. * If you have a two-tier rate timer, ensure it's working correctly and that the set time is sufficient to heat the water. * Ensure that the product is turned on. * Clean the grilles and ducts regularly to maintain sufficient air flow to ...

Summary

Introduction to the Heat Pump Water Heater

Safety Warnings Overview

Section containing safety precautions.

Installer Technical Information

Indications for qualified installation personnel.

User Operating and Maintenance Guide

Information for final users on operation and maintenance.

Critical Safety Warnings

Important Cautions

Appliance General Information

Detailed Technical Data Specifications

Contains detailed technical specifications and performance data.

Installer Technical Guidelines

Installer Qualification Requirements

Requirements for personnel performing installation and start-up.

Instruction Implementation Responsibility

Emphasizes installer's responsibility for following manual and informing user.

Installer Safety Regulations and Risks

Lists safety regulations and associated risks with symbols.

Appliance Installation Guide

Installation Site Selection Criteria

Requirements for selecting a suitable installation site.

Water Inlet, Outlet, and Safety Connections

Details on water inlet/outlet connections and safety devices.

Electrical Connection Requirements

Specifies cable types, maximum current, and connection requirements.

Ground Positioning and Securing

Guidance on how to position and secure the appliance.

Air Intake and Exhaust Ducting

Instructions for connecting air intake and exhaust ducts.

Initial Appliance Start-Up Procedure

Permanent Electrical Connection Setup

Dual Power Supply Electrical Connection

Dual Power & HC-HP Signal Connection

Auxiliary System Connections

User Operation and Maintenance Guide

User Initial Start-Up Checks

Legionella Growth Prevention Guidelines

Guidelines for preventing Legionella growth based on a European standard.

User Operation Recommendations

User Safety Regulations and Precautions

Lists safety regulations and risks related to user operations.

Appliance Usage Instructions

Control Panel Layout and Functions

Accessing the Installer Menu

Information on accessing and modifying installer-specific parameters.

Two-Tier Electricity Rate Operation (P7)

Error History Access (P19)

Operating Mode Management (P8)

Adjusting Water Temperature Settings

Photovoltaic System Integration (P9)

Understanding Operating Modes

SG Signal Functionality (P18)

Fault Diagnosis and Troubleshooting

How faults are displayed and initial troubleshooting steps.

Authorized Maintenance Procedures

Appliance Draining Procedure

User Performed Maintenance Tasks

Routine Filter and Duct Cleaning

Troubleshooting Common Issues

A table listing common problems, causes, and solutions.

Ariston NUOS Specifications

General IconGeneral
BrandAriston
ModelNUOS
CategoryWater Heater
LanguageEnglish

Videos

How to Troubleshoot Error F4 on Ariston NUOS EVO 110

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