User guide
User Instructions
Please read the instructions carefully before the installation or operation of this HSE-HNS 
heater (henceforth the HSE-HNS water heater will be referred as water heater). This user guide 
is meant for your future reference. 
?Only the company recommended professional installers will install the A. O. Smith water 
heater for you. In case of improper installation of the water heater by unauthorised 
personnel, A. O. Smith will not be responsible. 
?If the users install the water heater manufactured by our company by themselves or do it 
by using the self prepared installation materials, our company will not be liable for any 
adverse effects on normal operation and service performance of the water heater, 
including but not limited to pipeline leakage, fall or improper installation thereof and 
harmful effects on or damage to the body of the water heater as well as all losses 
incurred thereby. 
?After installation and operation of the water heater, users should inspect the water 
heater regularly and make necessary maintenance according to the service conditions. 
If any abnormality occurs, stop the operation of the water heater immediately and dial 
our Customer Care No. 1.800.103.2468 for repair to ensure the normal, safe and reliable 
operation of the water heater.
?The anode rod is a consumable part and should be examined and replaced at regular 
intervals. It is suggested that the longevity is for 2 to 3 years. Consumers should register 
and replace the anode rod by dialling our Customer Care No. 1.800.103.2468. In this 
way, the service life of the water heater will be extended effectively.
?Prior to any maintenance or repair of the water heater, please ensure to cut off the 
power. Those installers who are not recommended by A. O. Smith should not adjust or 
repair the water heater.
?In case the water heater is subject to dry heating, the generated steam or burning water 
might lead to serious scald. Therefore, it is necessary to fill the water heater with water. If 
dry heating occurs, cut off the power and water supply at once, stop the operation, dial 
the Customer Care No. 1.800.103.2468 and carry out inspection or repair by our 
company recommended professional installers.
?This water heater is provided with power cord, if any damage is observed before 
installation, contact our Customer Care No. 1.800.103.2468. (Primary components of the 
water heater are protected by insulation layer and thermal protective coating so that the 
users can operate with ease).
?This water heater is equipped with relief valve. For the sake of safe operation, the 
mounting position of the valve should not be changed without permission and the 
blockage of valve outlet is strictly prohibited. The discharge pipe must be provided for 
the relief valve, mounted downwards continuously and should not be knotted in the 
middle. The discharge pipe shall be directly connected to the floor drain.
?Before installing the water heater, confirm that the power of water heater matches its 
electric meter capacity and power wire.
?This water heater should be earthed reliably. It is prohibited to connect the earth wire to 
neutral wire or tap water pipe.
?  If the temperature has been set and the relief valve has been installed by the 
manufacturer, for the sake of safe operation, users may not alter the installation location 
or block its outlet without permission. 
?Hot water above 50°C could result in scald. Before using hot water, please pay attention 
to testing water temperature by hand and use water at an appropriate temperature by 
mixing cold water. 
water 
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