A.O. Smith GAS WATER HEATER - User Manual

Water Heater
HSE-HNS 50, 60, 80 Litres
User Guide
* Conditions Apply
THE SAFEST GAS WATER HEATER
HIG-VNS-006
Dual Solenoid
Valve
Carbon Monoxide
Detector
(Optional)
Three Burners
Ignition Pin
Corrosion Resistant
(Oxygen free copper exchanger)
Warranty*



Summary

About A. O. Smith

Whats in the box?

Main Box Contents

Lists items included in the main box of the water heater.

Accessory Box Contents

Lists items included in the accessory box of the water heater.

User Instructions

General Usage Guidelines

Provides essential instructions for safe and proper use of the water heater.

Safety Information

General Safety Precautions

Outlines crucial safety measures for operating the water heater.

Gas Leak Detection Procedure

Step-by-step guide on what to do if a gas leak is suspected.

Specifications

Model and Technical Data

Details the technical specifications of the water heater model HIG-VNS-006.

Dimensions

Part Identification

Identifies and describes the various parts and their dimensions.

Key Features

Dual Solenoid Valve

Explains the function and safety benefits of the dual solenoid valve.

Three Burners System

Describes the three-burner system for efficient combustion and economy.

Anti Flue Block Safety Device

Details the safety feature that detects and responds to blocked exhaust flues.

CO Detector Functionality

Explains the optional carbon monoxide detector and its detection mechanism.

Warranty Overview

Provides information on the warranty coverage for the water heater.

Safety Features

Flame Failure Protection

Describes the safety mechanism that shuts off gas if the flame is extinguished.

Ignition System Safety

Explains the single ignition pin explosion-proof system and its advantages.

Gas Pressure Stabilization

Details the device that ensures optimal gas pressure for burner safety.

Exhaust Gas Safety Features

Advanced Power Vent System

Explains the power vent system for safe expulsion of exhaust gases.

Other Safety Features

Water Sensor Operation

Describes the water sensor ensuring sufficient water flow to prevent dry firing.

Power Input Stabilization Circuit

Details the circuit that stabilizes voltage fluctuations for reliable operation.

High Temperature Limit Switch

Explains the safety switch that cuts off gas supply if temperature exceeds limits.

25 Minute Auto Shut-off

Describes the timer that automatically shuts off the unit after 25 minutes of continuous use.

Well Built to Last Long

Corrosion Resistant Heat Exchanger

Highlights the corrosion protection and use of oxygen-free copper in the heat exchanger.

Installation Instructions

Installation Location Guidelines

Provides guidance on selecting a suitable and safe location for water heater installation.

Installation Safety Warnings

Covers crucial safety warnings and cautions related to the installation process.

Mounting Instructions

Mounting Recommendations

Details the 'Do's and Don'ts for correctly mounting the water heater.

Venting Instructions

General Venting Rules

Outlines essential rules for properly venting the water heater and its components.

Vent Termination Guidelines

Provides rules for locating and installing the vent terminator safely.

Operating Instructions

Safe Operation Procedures

Step-by-step instructions for safe and correct operation of the water heater.

Maintenance and Cleaning

Routine Maintenance Tasks

Details the procedures for cleaning and maintaining the water heater components.

Vent System and Motor Care

Specifies inspection and cleaning requirements for the vent system and motors.

Consumer Safety Information

Area Safety Guidelines

Advises on keeping the area around the water heater clear of hazards.

Operational Safety Features

Explains the built-in safety features that protect against overheating and flame failure.

Error Codes

Fault Code Reference

Lists common faults and their corresponding error code indicators.

Circuit Diagram

System Wiring Overview

Illustrates the electrical connections and components of the water heater.

Warranty

Product Warranty Terms

Details the terms and conditions of the product warranty, including duration and coverage.

Extended Warranty Registration

Information on how to register for the extended warranty program.

General Terms of Warranty

Post Warranty Service Options

Explains service options available after the warranty period expires.

Service and Maintenance

Customer Care and Contact

Provides contact information for customer care, including helpline and email.

Registered and Regional Offices

Lists the company's registered and regional office addresses.

Overview

1. Function Description
2. Usage Features
3. Maintenance Features

The A. O. Smith Instant Gas Water Heater is a sophisticated and energy-efficient appliance designed to provide continuous hot water for domestic use. This user-friendly device incorporates innovative technologies and robust safety features, making it a reliable choice for families.

Function Description

The primary function of this gas water heater is to heat water instantly using natural gas, ensuring a continuous supply of hot water on demand. It operates by igniting gas burners when water flow is detected, rapidly heating the water as it passes through a heat exchanger. The system is designed for indoor, wall-hung installation and requires an AC power supply for its electronic controls and power vent system.

Usage Features

The A. O. Smith Instant Gas Water Heater is engineered for convenience and safety, offering several features that enhance its usability:

• Knob Controls: The front cover features intuitive knobs for controlling gas flow and winter/summer settings, allowing users to adjust the outlet water temperature to their preference.
• Automatic Ignition: Upon detection of water flow, the water heater automatically ignites its burners, providing hot water within seconds.
• Continuous Hot Water: Unlike storage water heaters, this instant gas model delivers hot water continuously, eliminating the wait time for water to reheat.
• 25 Minutes Timer (Child Lock): For safety and energy conservation, the unit automatically cuts off the gas supply and ignition if it runs continuously for more than 25 minutes. To resume hot water supply, users simply turn off and then turn on the water inlet. This feature also acts as a child lock, preventing unintended prolonged use.
• Freeze Protection (Drain Function): In ambient temperatures below freezing, a drain function in the pressure relief valve allows users to drain residual water from the unit. This prevents freezing, which could otherwise cause cracks in the water tubes and damage the heater.
• Dual Solenoid Valve: This feature ensures a reliable and effective cut-off of the gas supply, adding an extra layer of safety by preventing gas leakage when the unit is not in operation or in case of a fault.
• Three Burners: The inclusion of three burners optimizes gas combustion, leading to lower gas consumption and reduced carbon monoxide emissions, making it an economical and environmentally friendly choice.
• Anti Flue Block Safety Device: An integrated air pressure switch monitors the exhaust gas pressure. If a blockage in the exhaust flue pipe is detected, the device automatically switches off the gas water heater by cutting off the gas supply, preventing the build-up of harmful gases.
• Carbon Monoxide (CO) Detector (Optional): For enhanced safety, an optional patented carbon monoxide detector identifies the presence of CO in the vicinity. If CO levels exceed 150 ppm, the detector cuts off the inlet gas supply and triggers an audible alarm, protecting occupants from CO poisoning.
• Flame Failure Protection: In the event that the flame is extinguished during operation, this system automatically switches off the gas supply, preventing unburnt gas from accumulating.
• Ignition Pin Explosion Proof System: Unlike battery-powered ignition systems that can fail with diminishing battery power, leading to dangerous gas build-up, this system ensures reliable ignition, preventing explosive combustion.
• Gas Pressure Stabilization Device: This device ensures that gas is supplied to the burners at an optimum pressure, even if the incoming gas pressure fluctuates beyond specified limits, thereby maintaining safe and efficient operation.
• Advanced Power Vent Exhaust System: Coupled with ducting, this system efficiently expels burnt gases from the water heater to the outside atmosphere, ensuring effective removal of harmful exhaust gases from the kitchen or bathroom, even in windy conditions.
• Advanced Water Sensor: This sensor ensures that sufficient water is flowing through the heat exchanger during operation, preventing "dry firing" and extending the life of the water heater.
• Power Input Stabilization: An in-built power stabilization circuit helps to stabilize input voltage fluctuations, protecting the electronic components of the water heater.
• High Temperature Limit Protection Switch: This safety switch automatically cuts off the gas supply and switches off the water heater if the water temperature exceeds a preset maximum, preventing scalding and damage to the unit.

Maintenance Features

Regular maintenance is crucial for the longevity and safe operation of the A. O. Smith Instant Gas Water Heater. The design incorporates features that facilitate maintenance:

• Corrosion Resistant (Oxygen-Free Copper Exchanger): The heat exchanger, a critical component, is made from oxygen-free copper with a unique corrosion protection design. This material and design choice offer extended life compared to heat exchangers with lead or tin coatings, which can degrade at high temperatures.
• Easy Cleaning: The user guide provides instructions for basic cleaning, such as turning off electrical power, cleaning the water inlet filter, and using pressurized air to remove dust from the main burner, heat exchanger, and fan blades. The outer cover can be wiped with a soft, dry cloth.
• Vent System Inspection: The vent system should be inspected annually for blockages or damage to ensure proper exhaust of flue gases.
• Lubrication-Free Motors: The motors are permanently lubricated, eliminating the need for periodic lubrication. Annual cleaning of the fan and motor from dust and dirt is recommended.
• Snow Accumulation Prevention: Users are advised to keep the area around the flue terminal free of snow and ice to prevent impedance of intake air or exhaust, which could affect the heater's function.
• Flame Monitoring: The burner flame should be observed to ensure it burns evenly with a clear, blue, stable flame, indicating correct operation.

The A. O. Smith Instant Gas Water Heater is designed with a strong emphasis on safety, efficiency, and durability, providing users with a reliable source of hot water while minimizing operational costs and environmental impact.

A.O. Smith GAS WATER HEATER Specifications