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Summary of Contents for A.O. Smith HPI-40D
- Page 1 Heat Pump HPI-40D HPI-50D User Guide...
- Page 2 About AOS Bath Congratulations on your purchase of an A. O. Smith water heater. AOS Bath is a water heater specialist that focuses on making leading water heater technologies available in Singapore. We represent A. O. Smith, the largest and most technologically advanced water heater manufacturer in the world.
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Page 3: Table Of Contents
Contents Specifications ..............6 Key features ..............7 Blue Diamond tank Blue Diamond elements Touch control panel Hot water display Instant heating MAX function Intelligent dormancy Programmable timer 3 year full warranty Thermal cut out High efficiency insulation Pressure relief valve (safety valve) Anode protection Installation .................9 Mounting... - Page 4 User guide Please read the instructions carefully before the installation or operation of this heat pump Water Heater. This manual is meant for your future reference. • Only professional installers recommended by AOS Bath will install the AOS heat pump for you. For improper installation of the heater by unauthorized personnel, AOS Bath will not be responsible.
- Page 5 Water discharged from the heat pump (including high temperature heating water) shall not be used for drinking. The heat pump system shall be installed in a dry place. Never insert or disconnect from the power source with a wet hand. The heater shall be permanently connected to the electricity supply using a double pole linked switch that has a contact separation of at least 3mm between poles incorporated in the circuit and out of reach from the person using the shower.
- Page 6 Safety Features Compressor protection System will stop operation of compressor in the event of an overheated compressor Relay operation protection System will shut down to prevent overvoltage, fire and other relay-related issues Electronic expansion valve protection System will stop operation of compressor if the electronic expansion valve is found to have issues High-low voltage protection System will shut down to protect system components due to variation of external voltage beyond safety levels...
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Page 7: Specifications
Specifications Dimensions HPI-40D HPI-50D Total height (mm) 1610 1850 Height, base to relief valve (mm) 1056 1243 Tank diameter (mm) Ø520 Ø520 Specifications HPI-40D HPI-50D Rated volume (L) Voltage (V) / frequency (Hz) 220~/50 220~/50 Rated input power (W) 3000... -
Page 8: Key Features
Key features Blue Diamond tank Patent US6303183 Blue Diamond tanks provide higher superior corrosion resistance and durability than steel or stainless steel tanks. Blue Diamond elements Patent ZL200510037670.1 Blue Diamond elements are more scale-resistant and have higher heating efficiencies than conventional steel elements. Touch screen control panel Full control of your water heater. -
Page 9: Intelligent Dormancy
Patented Automatic Energy Saver (AES) ZL00112584.2 Memory chip records up to 21 days of your family’s usage habits and send data to the heater for more efficient heating at the lowest cost AOS Bath 3 year full warranty AOS Bath provides the longest on-site water heater warranty in Singapore for A. O. -
Page 10: Installation
Installation Caution • Please wait for 30 minutes before using the heater for the first time. • The heater should only be connected to a power source after a full installation which ensures secure mounting, piping, wiring and filling of the tank with water. •... -
Page 11: Power Connection
HPI-40D HPI-50D Recommended distance (mm) Recommended distance (mm) Minimum distance (mm) Diameter (mm) Height (mm) 1660 1850 TP valve outlet to floor (mm) 1056 1243 Condensation pipe connection Ensure the condensation water pipe connected to the water outlet is unobstructed and connected to the floor drain. -
Page 12: Directions For Use
Directions for use Caution Before using the water heater, ensure it is filled with water and that the power plug has been connected properly. Initial power up When the heater is connected to the power source for the first time, the electronic controller will detect the system. - Page 13 Setting the clock Ensure the indicator lights for ‘Timer 1’ and ‘Timer 2’ are off. Hold down the ‘Program’ button for 3 seconds till the time on the screen flashes. Press the “‡” the “ˆ” buttons to set the hour, then press the ‘Program’...
- Page 14 Press the ‘Program’ button again to finalize the start time and to start setting the end time. The end time is set in the same manner as the start time. While setting this timing, the indicator lights for ‘Timer 1’ and ‘Time Off’ should be lit. For example, if the timer is set from 20:30 – 22:00, the setting panels should look like these: Setting the start time for timer 2 Setting the start time for timer 1...
- Page 15 AES is a memory chip that records up to 21 days of your family’s usage habits. It 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. Instant heat function In situations where there is insufficient hot water in the tank, users may press the ‘Instant’...
- Page 16 Pressure relief valve inspection The pressure relief valve is a safety device installed to protect the tank against excessive pressure build up. The valve relieves pressure when it exceeds 0.8MPa in the form of intermittent water droplets. Users should check the valve regularly by lifting the handle on the valve to discharge any calcium carbonate deposits.
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Page 17: Maintenance Instructions
Maintenance instructions Declaration Before using the water heater, ensure it is filled with water and that the power plug has been connected properly. Warning Electric shock: before repairing the water heater, be sure to disconnect the water heater from the power source. -
Page 18: Troubleshooting
Troubleshooting Problem Possible causes Corrective action Display is off 1. No power to heater 1. Switch on power to heater No hot water 2. No power at electric socket 2. Check power socket 3. Failure in control circuit or internal 3. - Page 19 Problem Possible causes Corrective action Display “H9” Black wire with eight-core terminal Contact local authorized dealer short circuit or open circuit Display “H0” The circulation pump temperature Contact local authorized dealer probe is shorted or opened when the circulation pump is started Abnormal noises coming 1.
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Page 20: Wiring Diagram
Wiring Diagram Caution • Before installing the heater, ensure that the power source and wires are suitable • The heater should be earthed reliably. Ensure the earth wire is not in contact with the neutral wire or any pipes • Once the temperature has been set and the relief valve installed, end users should not alter the installation location or tamper with the relief valve •...
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