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Remote Control Installation

For convenience, the remote control may be 
installed on a wall near the water heater.
Keep the remote control dry.  

Remote Control Batteries

Insert coin into slot and twist 
counterclockwise to open the battery cover

Use a CR2025 battery. The ‘+’ side should 
face upwards

Insert coin into slot and twist clockwise to 
close the battery cover

12

Front cover

Filling the Tank

After all the pipes are connected, open the discharge valve of the water heater and then the feed 
valve. Fill the water heater with water and exhaust the air till a uniform water stream flows out of the 
hot water outlet. This indicates that the water heater has been filled up. Close the hot water 
discharge valve and check all connections for any leakage. If leakage occurs, empty the water tank, 
repair the leaked connection and then refill the heater with water. Do not close the feeding valve 
during the filling of water.

Summary of Contents for EWH-40MINI2

Page 1: ...Mini Water Heater Gen 8 Digital EWH 40MINI2 User Guide ...

Page 2: ...ies With 21 fully owned plants they are currently the largest water heater manufacturer in the world Over the years A O Smith has gained the respect and support of homeowners contractors architects and specifying engineers in over 60 countries by providing energy efficient hot and clean water solutions What s in the box 2 ...

Page 3: ...Contents Specifications 5 Safety Features 6 Product Features 6 Installation 9 Directions For Use 13 Maintenance Instructions 17 Troubleshooting 18 3 ...

Page 4: ...ff electrical water supply and stop using the heater Call our company service hotline and wait for our approved technicians to do the necessary checks and repair For safety issues do not change any of the settings of the pressure relief valve or temperature pressure relief valve Ensure all blockages are clear and install a drainage pipe to allow the overflow water to be discharged into a floor dra...

Page 5: ...erature range C 35 75 5 Rated water pressure MPa 0 8 Max min inlet water pressure MPa 2 0 3 0 Inlet outlet connection inches Waterproof grade IPX4 A O Smith reserves the right to make product changes or improvements at any time without notice 5 Dimensions Length mm 880 Width mm 340 Height mm 350 ...

Page 6: ...igent Maintenance Monitor IMM IMM helps to prevent corrosion of the internal heater tank The intelligent active system releases protective ions into the tank neutralizing aggressive corrosive ions in the water Automatic Energy Saver AES Patent ZL00112584 2 The AES memory chip records up to 21 days of usage habits and automatically heats water before users take a bath During off peak periods the he...

Page 7: ...l display of hot water from the control panel Instant Heating Patent ZL200820185859 4 Intelligent sleep mode The heater goes into power saving mode after 3 minutes of inactivity The latest instant technology allows users to get hot water from an unheated tank immediately without consuming more energy Programmable Timer The timer powers up the heater for you so you don t have to turn it on manually...

Page 8: ... longest warranty in Singapore 3years 8 High Efficiency Insulation A polyurethane foam insulating layer without freon is used which provides a good insulation and reduces heat loss effectively Blue Diamond Tank Patent US6303183 Patented A O Smith Blue Diamond Tanks provide superior durability The longest lasting Blue Diamond tank in the world was used for 52 years ...

Page 9: ...he heater The system must not be installed vertically Mounting Procedures and Precautions The surface for installation must be capable of supporting at least four times the weight of the water heater when filled with water If the water heater is not installed on the bearing wall or is mounted on hollow brick wall corresponding protective measures must be provided This water heater must be installe...

Page 10: ...e permanently connected to the electrical supply through a double pole switch having a contact separation of at least 3mm in all poles incorporated in the fixed wiring The insulation of the fixed wiring must be protected by an insulating sleeving with a temperature rating of at least 80 C Ensure the water heater is reliably grounded The earth wire must be longer than the current carrying conductor...

Page 11: ... The pipes should not be blocked The relief valve is to be operated regularly to remove lime deposits and to verify that it is not blocked If the water pressure of the inlet pipe approaches or exceeds the relief limit 0 80 MPa of the safety valve the valve will relieve pressure automatically Refer to the following diagram for the pipe connection We recommend the use of a double check valve assembl...

Page 12: ...ttery cover 12 Filling the Tank After all the pipes are connected open the discharge valve of the water heater and then the feed valve Fill the water heater with water and exhaust the air till a uniform water stream flows out of the hot water outlet This indicates that the water heater has been filled up Close the hot water discharge valve and check all connections for any leakage If leakage occur...

Page 13: ...ating begins and the heating indicator lights up The default settings are Power 4000W Time 12 00 Thermostat 70 C If the water heater encounters a power outage all settings will revert to default settings 3 Setting the temperature The water heater can simultaneously display both the actual temperature and set temperature The actual temperature measures the average internal tank water temperature an...

Page 14: ...oes on Before setting the timer ensure the clock is adjusted to the right time Note that the timer start time is set first followed by the end time Toggle the Program button till the Timer indicator is lit then press and hold down the Program button for 3 seconds till the time on the screen flashes You are now adjusting the timer start time Use the and buttons to make 30min increments or decrement...

Page 15: ...ctive AES is a memory chip that records up to 21 days of your family s usage habits It is an automatic timer which preheats water according to your family s needs and sends the heater into energy saving mode at required intervals saving energy by minimizing thermal loss Note None of the timers will work if AES is activated 10 Intelligent sleep The water heater s display panel goes into sleep mode ...

Page 16: ...cator will flash on the panel Users will be prompted to contact a qualified AOS service personnel to change their depleted anode rod and perform a tank flush Tank lifespan will be prolonged when the corrosive ions are neutralized Water ion quality test result Circuitry issues E fault indicator 14 Pressure relief valve inspection The pressure relief valve is a safety device installed to protect the...

Page 17: ...ter heater to the tap water pipeline and fill water from this end The water inlet pipe connection is connected to floor drain by pipes Discharge water from this end 4 Open the water inlet valve to get the maximum tap water flow and flush the tank till the drained water from the tank becomes clean 5 Connect the water inlet and outlet pipes again and put the water heater to use after a leakage test ...

Page 18: ...joints Reconnect pipes of the water heater and be sure to use sealant Display E0 Blue wire of two core terminal open circuit or short circuit Contact local authorized dealer Display E1 Red wire of two core terminal open circuit or short circuit Contact local authorized dealer Display E2 Black wire of two core terminal open circuit or short circuit Contact local authorized dealer Display E3 White w...

Page 19: ...er with the relief valve Hot water over 50 C will scald Always test the water temperature by mixing it with cold water before coming into contact with it This appliance is not intended for use by persons including children with reduced physical sensory or mental capabilities or lack of experience and knowledge unless they have been given supervision or instructions concerning use of the appliance ...

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