A.O. Smith Aosbath D25A2 Bedienungsanleitung

User Guide

Hot Water Dispenser, HWT3

1. IMPORTANT

Please read this manual carefully before using the product and store it for future reference.

If the user installs the hot water dispenser by themselves or does it by using the self-prepared installation

materials, AOS Bath will not be liable for any adverse effects on the normal operation and service performance of

the system.

The maintenance of this machine requires the use of approved parts and the problems caused by the use of

unauthorized parts (degradation of performance or property damage) are not covered by the manufacturer's

limited warranty. If any components require a change, consumers should contact the local authorised dealer.

This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental

capabilities, or lack of experience and knowledge.

Warning

: Failure to follow these instructions may lead to risk of fire and could cause property damage and or

personal injury or death

The hot water tank should be installed under-

sink, below the faucet. Do not place the tank on

the countertop or mount it on a wall. The

recommended

height distance between the

tank and faucet is 60-80cm

Maintain a safe distance from the faucet

exhaust and water outlet to prevent

scalding.

Do not disassemble or modify this system.

Do not expose the system to corrosive

substances.

Disconnect the system from power source

during installation and troubleshooting. Do

not touch power plug with wet hands.

Do not use a power supply that exceeds the

specifications of the machine. Ensure the

power cord and socket are in good

condition.

If any abnormality occurs, stop operation of

the system immediately.

Do not cover the appliance with

a cloth or cover the faucet

exhaust hole.

The system must be paired with

a compatible A. O. Smith RO

Water Purifier.

The tank should not be exposed

to water.

Do not place the machine close

to a fire source.

The system must be connected

to a socket with a reliable

grounding.

Use an independent use a

power socket with a minimum

rated current of 10A. Ensure all

connections are secure.

Examples of abnormal conditions

The power plug and the power cord are overheating; the power cord is damaged or there is an intermittent

power supply; the tank is damaged or misshaped, parts are loose; tank emits smoke and has a burnt smell; steam

jets from the faucet for over 10 minutes; the faucet automatically discharges hot water.

Do not place system outdoors or

under direct sunlight.

Do not place system in an area of high

temperature and humidity. Do not place in

an environment below 5ºC.

2. PRODUCT INFORMATION

FEATURES

The child-friendly under sink hot water dispenser is paired with a Reverse Osmosis water purifier to ensure that

zero trace metals are present in the water while it is being boiled. The dispenser is equipped with a patented

heating system for safe and convenient under-sink storage that does not give out steam. The hot water inner

tank material is a food-grade 304 stainless steel tank and comes equipped with a self cleaning, self-refilling

function.

SPECIFICATIONS

The Company reserves the right, at its discretion

to modify these specifications at any time.

Model D25A2 Hot Water Dispenser

Rated voltage 220V~/50Hz

Rated power 950W

Hot water tank volume 2.5L

Hot water production capacity 7L/h (>90ºC)

Shock protection Tier 1

Net weight 6.3kg

Incoming water temperature 5~38ºC

Water dispensed Potable water

Health permit approval number (2018) 3201-0108

Safety standard Q/320124 AONJ 045-2018, GB4706.19-2008

For users who are particular about consuming

water left overnight, the system easily cleans and

flushes the internal tank at the touch of a button.

High density heat insulation maximizes energy

saving for a greener environment.

DIMENSIONS (measurements in mm)

3. OPERATION GUIDE

INSTRUCTIONS

1. Child Lock

The child lock only shuts off the hot water channel. Tap indicator to

unlock. After 8 seconds of inactivity, the child lock automatically activates

again.

2. Filter Life Indicator

Different colours are displayed according to the life of the individual filters.

White

: Normal

Orange

: 5% remaining life, to be replaced as soon as possible

Red

: 0% remaining life, to be replaced immediately

To replace the filters, contact AOS Bath Singapore at 6842 0090, or order a

filter at www.aosbath.com

3. Hot Water Temperature Display

Red flame indicator lights up when heating is in progress.

4. Hot Water Volume Display

indicator reflects balance hot water available

5. Replenish Mode

Unlock the system to toggle between two replenishment modes.

Hot water

button

Room temp

water button

6. Temperature Setting

Unlock the system to toggle between four temperature modes.

Refill When Empty

When hot water is drained, tank refills automatically.

Smart Refill

When half the tank is drained, tank refills automatically.

Note

: At the point of being refilled, water will be heated to boiling point.

The system houses a smart boiling point adaptor that operates in

accordance with the altitude of the installation area. If the boiling point of

the installation area is lower than the set temperature, the system

automatically adjusts the thermostat 2ºC below the local boiling point. For

example, if the local boiling point is 95ºC and the user selects a 98ºC

temperature setting, the system will only heat to 93ºC.

Maintain at 98ºC Maintain at 90ºC Maintain at 60ºC Room Temp.

7. Tank Flush

Unlock the system to access this feature. Next, press and hold the key for 3 seconds. The

faucet will discharge hot water and drain the tank. To cancel or pause, touch the key again to

stop.

Caution: Water discharged from the faucet is hot.

INITIAL SETUP

If system is reinstalled in an area of significant altitude difference, please repeat the initial setup steps to allow for

recalibration.

2. Reset to factory settings

1. Power on Connect the power

supply and reset to

factory settings within

10 minutes of powering

up the system.

3. Complete setup

A buzzer will sound to signal an effective reset to factory settings.

Note: If you do not hear the buzzer, the system has not been reset. Repeat the steps again.

Press or raise the hot water

button (red) and at the same

time, press the room

temperature water button

(blue) 3 times.

DISPENSING WATER

1. To dispense hot water, the system must be unlocked.

The lock indicator will flash to prompt user for an unlock if the hot water button is activated without

unlocking.

2. The hot water button is red and the room temperature water button is blue.

3. Press and

hold the button

to to dispense

water and

release to stop

the flow.

4. For continuous

dispensing, lift the

button up. Return

button to original

position to stop the

flow.

Press and

hold

Lift

DISPENSER PRECAUTIONS

1. Water can only be dispensed continually for a maximum of 10 minutes.

2. Operating two buttons at the same time will stop the flow of water. To resume, return both buttons to their

original position and try again.

3. When water has just begun to boil in the tank or when water temperature is high, air bubbles may enter the

hot water pump, resulting in poor water flow. Please allow a few seconds for the water to settle and try

again.

4. When boiling has only just begun or if system has been inactive for a long period of time, the first glass of

dispensed water may not be as hot.

5. In the process of boiling, the cover of the tank and the body of the heater may feel warm to touch. This is

normal.

6. If the system is newly installed or has not been used for a long time, users are recommended to drain the hot

water twice before consumption.

FAUCET PRECAUTIONS

1. After 10 minutes of inactivity, the system enters sleep mode and the panel will only display the logo and child

lock indicator. Touch any key on the panel to exit sleep mode.

2. If the heat function of the system is deactivated, sleep mode will only display the logo, child lock indicator

and the filter life indicator.

THE WATER TANK

Power button

Heating should begin the instant the system is powered on. Press and hold the power button for 3

seconds to power the system on or off. You should hear a beep each time the button is activated.

Precautions

1. To prevent freezing in an extremely cold environment, the system will automatically power on should the

water temperature fall below 5ºC.

2. If the system has been powered on and is maintaining a fixed temperature for over 3 days with no usage, the

heat function will go off. Pressing any key on the system will reactivate it.

FAULT CODES

Code Possible reason Code Possible reason

F8 Dry heating E1 Water temperature

sensor fault

C4 Overheating E6 Steam temperature

sensor fault

C2 Level sensor data

incorrect C1 Level sensor failure

4. INSTALLATION GUIDE

The system must be installed by an authorized personnel from AOS Bath as the system can only be activated with

unique activation codes from the manufacturer.

Note: The hot water tank is specifically designed to be an under-sink tank and may not be installed on the

countertop or mounted on a wall. The recommended height distance between the tank and faucet is 60-80cm.

Failure to comply with proper installation requirements may result in a malfunction.

PREPARATION BEFORE INSTALLATION

1. Set aside a location for the hot water tank and faucet dispenser. The dispenser should be mounted on the

countertop and the tank should be below it, under the sink.

2. Check that you have the necessary tools on hand for the installation: An electric drill, a pair of needle-nosed

pliers, a countertop drill, a 3mm drill bit, an adjustable wrench (>37.5m opening), a cross screwdriver and a

slotted screwdriver.

INSTALLING THE FAUCET

If countertop surface is very thin, it follows that the faucet may be slightly unstable after installation. This is still

acceptable for operation.

Hot water

button

Room temp. water button

Spout

Touch screen display

Aerator

Body

Base cap

O-ring Nut

Exhaust

Room temp. water pipe

Mounting base

Lock bolt, base

Hot water pipe

Lock bolt, flat

Base reinforcement

Data cable

1. Drilling

Drill a hole of 26-32mm in

diameter to begin the

installation.

4. Tighten the base

Tighten the locking bolts at the base

with an M7 allen key (provided).

Allen key

5. Install the faucet

Cut two flexible pipes

of the right length and

insert them through a

holder at the faucet’s

main body. Insertion

points should

correspond with the

specially designed

connection holes of

the mounting base.

Body

Tip

: Before insertion, draw a line 16mm away from the end of the water pipe. After the water pipe is inserted,

the marking line should not be visible.

Align the

faucet with the

mounting base

and use a

wrench to fix

the nut firmly

on to the

mounting base.

6. Tighten the nut

Nut

Wrench

7. Complete installation

Place base cap

above the nut to

complete the

installation.

Base cap

Note: When cleaning the surface of the faucet, use a soft sponge. Avoid metal sponges to prevent scratches

and damage. A faucet damaged in this manner will not be covered under the warranty.

2. Install base reinforcement 3. Insert the base

Insert the

mounting base

into the hole

from above.

Tear off the double-sided tape on the base

of the base reinforcement and paste it at

the inline at the base of the hole.

Mounting

base

Lock bolt, base

WIRING DIAGRAM

PRECAUTIONS

1. Use a dedicated power socket.

2. Before connecting the new water purifier to the hot water tank, ensure the water purifier has been flushed

correctly.

Exhaust

Water purifier

data cable

Purified water

feed tube

Faucet

data

cable

Room

temp.

water

outlet

Hot

water

outlet

Power cable

5. SYSTEM DIAGRAM

EXPLODED VIEW DRAWING

Top cover

Steam sensor

Check valve

Heater cover & steam condenser

Right panel

Water level

sensors

Thermal

insulation

Bottom cover

Power supply board

LED display

Power button

Solenoid valve

Left panel

Heating indicator

Heating element

Fuse

Water pump

Water temp. sensor

Thermal cut out

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