Dux 26ENG5N User manual

Owner’s Guide
Thank you for purchasing this Dux Gas Water Heater.
Before using, please:
Read this manual completely for operating instructions.
Confirm warranty and proof of purchase.
Keep this manual where it can be found whenever necessary.
Installation must conform with Plumbing Code of Australia (PCA) and local codes, or in the absence of local codes, AS/
NZS 5601, AS/NZS 3500.4, AS/NZS 3000 wiring regulations and all Local Building, Water and Gas fitting regulations.
Dux reserves the right to discontinue, or change at any time, the designs and/or specifications of its products
without notice.
* Note: This appliance requires a minimum flow rate to operate of 1.5-2.5 litres/min., water fixtures with a flow
rate of 7.5 litres/min. or higher are recommended.
For optimum performance we recommend installation of Dux optional temperature controllers.
(e.g. 26ENG5N)
Non Condensing Models
26ENG5N
26ENG5L
26ENG6N
26ENG6L
21ENB5N
21ENB5L
21ENB6N
21ENB6L
17ENB5N
17ENB5L
17ENB6N
17ENB6L
FOR CONTINUED SAFETY OF THIS APPLIANCE IT
MUST BE INSTALLED, OPERATED AND MAINTAINED
IN ACCORDANCE WITH THE MANUFACTURER’S
INSTRUCTIONS.
WARNING
FH9M001
Rev. 09/21 GISI093

Owner’s Guide
2
• Do not store or use petrol or other flammable vapours and liquids in the vicinity of this or any other
appliance.
• WHAT TO DO IF YOU SMELL GAS
- Do not try to light the appliance.
- Do not touch any electrical switches; Do not use electrical appliances, including the phone” inside the
building.
- Immediately call your gas supplier, from a safe distance from the gas leak.
• DO NOT SPRAY AEROSOLS IN THE VICINITY OF THIS APPLIANCE WHILE IT IS IN OPERATION.
• DO NOT PLACE ARTICLES ON OR AGAINST THIS APPLIANCE.
• DO NOT MODIFY THIS APPLIANCE.
• 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
instruction concerning use of the appliance by a person responsible for their safety.
• To prevent injury or death, do not allow small children to bathe or play in the bathroom unsupervised.
• This appliance is not suitable for use as a pool heater.
• DO NOT USE OR STORE FLAMMABLE MATERIALS IN OR NEAR THIS APPLIANCE.
• Installation and service must be performed by a qualified installer, service agency or the gas supplier.
If the information in this manual is not followed exactly, a fire or explosion may
result causing property damage, personal injury or death.
WARNING
To prevent damage to property and injury to the user, the icons shown below will be used to warn of varying
levels of danger.
Every indication is critical to the safe operation of the Water Heater and must be understood and observed.
Potential dangers from accidents during installation and use are divided into the following four categories.
Closely observe these warnings; they are critical to your safety.
Icons warning of risk level
This is the safety alert symbol. It is used to alert you to potential personal injury hazards.
Obey all safety messages that follow this symbol to avoid possible injury or death.
DANGER Indicates an imminently hazardous situation which, if not avoided, will result in
death or serious injury.
WARNING
I ndicates a potentially hazardous situation which, if not avoided, could result in
death or serious injury.
CAUTION Indicates a potentially hazardous situation which, if not avoided, may result in
minor or moderate injury
NOTICE Indicates a potentially hazardous situation which, if not avoided, may result in
property damage.
Important Safety Information

Owner’s Guide
3
Vapours from flammable liquids will explode
and catch fire causing death or severe burns.
Do not use or store flammable products such
as petrol, solvents or adhesives in the same
room or area near the Water Heater.
Keep flammable products:
1. Far away from the Water Heater.
2. In approved containers.
3. Tightly closed.
4. Out of children’s reach.
Vapours:
1. Cannot be seen.
2. Vapours are heavier than air.
3. Go a long way on the floor.
4. Can be carried from other rooms to the
main burner by air currents.
DANGER
Flammable Vapours
A. This Water Heater does not have a pilot.
It is equipped with an ignition device that
automatically lights the burner. Do not
try to light the burner by hand.
B. BEFORE OPERATING smell all around the
Water Heater area for evidence of leaking
gas. Be sure to smell next to the floor
because some gas is heavier than air and
will settle on the floor.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do
not use any phone in your building.
• Immediately call your gas supplier.
Follow the gas supplier’s instructions.
C. Use only your hand to turn the gas valve
knob. Never use tools. If the knob will
not turn by hand, don’t try to repair it.
Call a qualified service technician. Force
or attempted repair may result in a fire or
explosion.
D. Do not use this Water Heater if any part
has been under water. lmmediately call
a qualified service technician to inspect
the Water Heater and to replace any
damaged parts.
WARNING
WARNING
Hot Water Heater temperatures over 50°C
can cause severe burns instantly or death
from scalding.
Children, disabled and elderly are at the
highest risk of being scalded. Feel water
temperature before bathing or showering.
Temperature limiting valves are available, ask
licensed installer.
Do Not Install Indoors.
This will cause carbon monoxide poisoning
and a potential fire hazard.
When a gas leak is noticed:
1. Stop use immediately.
2. Close the gas valve.
3. Contact your gas supplier immediately.
If you detect abnormal combustion or
abnormal odours, or during an earthquake,
tornado or fire:
1. Turn off the hot water supply.
2. Turn off the power to the Water Heater.
3. Turn off gas and water supply valves.
4. Call Dux on AU 1300 365 115.
Check the temperature of the running hot
water before entering the shower.
Check the temperature before stepping into
the bath.
To prevent burns or scalding, turn off
the Operation button and wait until
the appliance cools before performing
maintenance.
Do not install this Water Heater in a mobile
home, recreational vehicle or on a boat as
this may be a Carbon Monoxide Poisoning
Hazard.

Owner’s Guide
4
Leave the proper clearance between the
Water Heater and nearby objects (trees,
timber, boxes with flammable materials,
etc.).
Do not place combustibles such as laundry,
newspapers, oils etc. near the Water Heater.
Do not use combustible chemicals such
as oil, petrol, benzene etc. in the near the
Water Heater or the exhaust vent.
Do not store or use petrol or other
flammable vapours and liquids in the vicinity
of this or any other appliance.
Do not place or use a spray can near the
Water Heater or the exhaust vent.
Do not place the Water Heater in an indoor
environment by means of adding walls and
ceiling (Do not enclose using corrugated
sheets, etc.).
Carbon monoxide poisoning or fire may occur
as a result.
Installation and service must be performed
by a qualified installer, service agency or the
gas supplier.
Do not use hair spray or spray detergent in
the vicinity of the Water Heater.
Check that the data plate.
Upper:
Min. 500 mm
Right side:
Min.
500 mm
Left side:
Min.
500 mm
Front:
Sug. 600 mm
xx
xxxxxxxx
xx
xx xx
xx
(e.g. For Natural Gas)
Do not install in locations where excessive
dust or debris will be in the air.
To prevent injury or death, do not allow
small children to bathe or play in the
bathroom unsupervised.
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
instruction concerning use of the appliance
by a person responsible for their safety.
Do not touch the power cord with
wet hands.
Contact a qualified service technician for any
necessary repairs, service or maintenance.
Do not use parts other than those specified
for this appliance.
If the appliance delivers water in excess of
50 Degrees, the following warning must be
adhered to:
THIS APPLIANCE MAY DELIVER WATER
AT HIGH TEMPERATURE. REFER TO THE
PLUMBING CODE OF AUSTRALIA (PCA),
LOCAL REQUIREMENTS AND INSTALLATION
INSTRUCTIONS TO DETERMINE IF
ADDITIONAL DELIVERY TEMPERATURE
CONTROL IS REQUIRED.
If the appliance is 50 degree locked model,
the following statement & warning must be
adhered to:
THIS APPLIANCE DELIVERS WATER NOT
EXCEEDING 50 C IN ACCODRANCE WITH AS
3498.
WARNING — THIS APPLIANCE MUST ONLY
BE INSTALLED IN ACCORDANCE WITH THE
ACCEPTABLE PLUMBING CONFIGURATIONS
SPECIFIED IN THESE INSTRUCTIONS. FAILURE
TO DO SO MAY RESULT IN CONDITIONS
WHERE DELIVERY TEMPERATURE CONTROL
IS INADEQUATE.
WARNING

Owner’s Guide
5
Do not use the Water Heater for other than
hot water supply, shower and bath.
Do not cover the Water Heater, store trash or
debris near it, or in any way block the flow of
fresh air to the appliance.
Do not use condensate, discharged from the
condensate drain pipe, for drinking or for
consumption by animals.
Do not touch the exhaust vent during or
immediately after operation of the Water
Heater.
CAUTION Be sure to electrically earth the appliance.
Keep power cord free of dust.
Do not use a broken or modified power cord.
Do not bind, bend or stretch power cords.
Do not scratch, modify, or subject them
to impact or force. If the supply cord is
damaged, it must be replaced by the
manufacturer, its service agent or similarly
qualified persons in order to avoid a hazard.
Do not turn off the Water Heater while
someone is bathing.
Do not exchange a remote controller cord
without notice.
Do not drink water that has been inside the
appliance for an extended period of time. Do
not drink the first use of hot water from the
appliance in the morning.
Clean the filter on the water inlet as
frequently as required. The quality of
your local water will affect the frequency
required.
Keep the area around the appliance clean.
If boxes, weeds, cobwebs, cockroaches etc. are
in the vicinity of the appliance, damage or fire
can result.
Do not install the appliance where the
exhaust will blow on walls or windows.
Treat hard, acidic or otherwise impure supply
water with approved methods to ensure full
warranty coverage.
Problems resulting from scale formation are
not covered by the warranty.
Do not run water through the appliance
when appliance is not on.
When discharging hot water, make sure the
appliance is ON. If water is run through the
appliance with the appliance OFF, water may
condense inside the appliance and cause
incomplete combustion or damage to the
internal electrical components.
Contact Dux before using with a solar heater.
NOTICE Do not disassemble the Remote Controller.
Do not use chlorine-based, acidic, alkaline
detergents, organic solvents such as benzine
and thinner, or Melamine Sponge to clean
the Remote Controller.
This may cause discolouration, deformation,
scratches or cracks.
Do not get the Remote Controller wet.
ECB1D and ECB2D are water resistant, too
much water can cause damage. ECM1D is not
water resistant.
Do not splash water on the Remote
Controller.
Do not expose the Remote Controller to
steam.
Although it is water resistant, too much water
can cause damage.
Do not locate the Remote Controller near
stoves or ovens.
This may cause damage or failure.
Preventing damage from freezing (See page
17)
• Damage can occur from frozen water within
the appliance and pipes even in warm
environments. Be sure to read below for
appropriate measures.
• Repairs for damage caused by freezing are
not covered by the warranty.
Power must be switched on at all times for
antifrost protection to work.
If it is snowing, check the air inlet, exhaust
gas vent and exhaust vent terminal for
blockage.

Owner’s Guide
6
Important Safety Information 2
Contents 6
General 7
Names and Functions of Controllers
Main Controller (ECM1D), Bathroom Controller (ECB1D) 8
Bathroom 2 Controller (ECB2D) 9
Initial Operation 10
Clock Adjustment 11
Setting and Using the Water Heater
Operation (Not using the Remote Controller) 12
Operation (Using the optional Remote Controller) 13
Controller Priority Function 14
Customizable Settings
Muting the Remote Controller 15
Bath Fill Function 15
Call Function 16
Frost Protection 17
Regular Maintenance 19
Troubleshooting 21
Follow-up Service 24
Specifications 25
Maintenance 26
Manufacturer’s Warranty 28
Contents

Owner’s Guide
7
General
1. Flue Exhaust
2. Front Cover
3. Air Inlet
4. Inlet water filter
Inside Water Inlet (See page 20)
5. Hot Water Pipe
6. Water Supply Valve
7. Gas Supply Valve
8. External Weatherproof Power Point
9. (26ENG series only) Status Display
Indicate the status of Water Heater or error codes.
When water heater is initially
plugged into power, set
temperature is displayed for
approx. thirty seconds.
On
When water is flowing, the bar
rotates clockwise.
When the gas burner is on, three
dots are displayed.
When the gas burner is on, set
temperature is displayed for a
minute and then “on” is displayed.
If an error has occurred, a blinking
error code is displayed.
If the bar rotates slowly
while blinking, that
means that water flow
rate is insufficient to
turn on the burner.
This illustration shows an example of installation.
The exact installation configuration may be slightly
different.
NOTE (For 26ENG series)
When using without remote
controller, check the set temperature
shown on the Status Display before
use.
(e.g. 26ENG5N)
1
2
5
4
3
9
6
7
8

Owner’s Guide
8
Main Controller (ECM1D), Bathroom Controller (ECB1D) <Optional>
• What is actually displayed depends on how the Water Heater is set.
• Before use, remove the protective sheet from the Remote Controller surface.
1. Operation Button / Indicator
For turning the Water Heater ON/OFF.
2. Bath Fill Button / Indicator
To activate Bath Fill. To set Bath Fill temperature.
(See page 15)
3. Setting Buttons
For setting the hot water temperature and other
settings.
4. • (For ECM1D) Set time Button
To set or indicate time of day. (See page 11)
• (For ECB1D) Call Button
To sound alarm at all remote controls. (See
page 16)
5. • (For ECM1D) Set volume Button
For setting the amount of water that is
delivered. (See page 15)
• (For ECB1D) Priority Button
To transfer control from another remote. (See
page 14)
6. Priority Indicator
When this indicator is displayed, the hot water
temperature can be set. (See page 14)
7. Burner on Indicator
When burning, the indicator is displayed.
8. Bath Fill Temperature Indicator
When this indicator is displayed, bath fill
temperature is displayed. (See page 15)
9. • Temperature setting (e.g. 40°C)
• Bath Fill Temperature setting (e.g. 40°C)
• Bath Fill Volume setting (See page 15)
• (For ECM1D only) Clock
When Set time button is pressed, the clock is
displayed. (See page 11)
• Error Code
A number will flash if a failure occurs. (See
page 23)
(ECM1D) (ECB1D)
Names and Functions of Controllers
2
1
3
5
4
9
2
1
3
5
4
6
7
8
9
6
7
8

Owner’s Guide
9
Bathroom 2 Controller (ECB2D) <Optional>
• What is actually displayed depends on how the Water Heater is set.
• Before use, remove the protective sheet from the Remote Controller surface.
1. Operation Button / Indicator
For turning the Water Heater ON/OFF.
2. Setting Buttons
For setting the hot water temperature. (See page
13)
3. Priority Indicator
When this indicator is displayed, the hot water
temperature can be set. (See page 14)
4. Burner on Indicator
When burning, the indicator is displayed.
5. • Temperature setting (e.g. 40°C)
• Error Code
A number will flash if a failure occurs. (See
page 23)
ON/OFF 1
2
3
4
5

Owner’s Guide
10
4. Turn on the power.
Before start using for the first time, do the
following:
Initial Operation
1. Open the water supply valve.
2. Open a hot water fixture to confirm that water
is available, and then close the fixture again.
Hot water
fixture
3. Open the gas supply valve.

Owner’s Guide
11
Clock Adjustment (For Main Controller only)
Operation • The clock display will then return to the
original screen display.
1. Press the Set time button.
Clock setting and the clock can be displayed
regardless of “ON or OFF" of the operation button.
(The illustration is in a state of "OFF".)
1. Press the Set time button until “0:00” is
flashing.
Flashing
• The flashing changes to constant illumination
when the clock has been set.
3. Press the Set time button.
Flashing
2. Adjust the clock using the ↑/↓buttons.
Flashing
Display the clock
• The time changes in 1-minute increments
with each press on the button, and then in
10-minute increments if the button is kept
pressed down.
NOTE • The clock display will disappear
if hot water is used or the
temperature of the hot water is
changed during the clock display.
• If the Time set button is pushed
when the hot water is being
used or a high temperature
(60°C or more) is set, the clock
is displayed for 10 seconds and
will return to the original screen
display after that.
• In the event of a power cut or
after disconnecting the power
supply, the clock on the display
screen will show 0:00 when the
power is restored. In this case
the clock will need to be reset.

Owner’s Guide
12
Operation (Not using the Remote Controller)
• Set temperature is displayed.
* When unit is initially plugged into power.
• The outside edge of the 2 digit display will
rotate in a circular pattern. If the amount of
water is too low, “L” will be indicated.
The factory temperature setting is 50°C (for 50
degree models) or 55°C (for other than 50 degree
models). Mix with cold water with a mixing valve or
at the fixture for desired temperature. 4. Turn off the hot water.
3. Mix for demand temperature.
2. Turn on hot water.
• To prevent scalding :
Hot Water Heater temperatures over 50°C can cause severe burns instantly or death from scalding.
• Children, disabled people and elderly are at the highest risk of being scalded. Please check the water
temperature before bathing or showering.
Temperature limiting valves are available, ask licensed installer.
• When setting the Water Heater to 60°C or higher, the temperature display will blink for 10 seconds.
• Take caution when using the Water Heater again after setting to 50°C or higher. Always check the set
temperature before use.
DANGER
(Status Display)
• The electrical power does not need to be
disconnected every time after using.
• How to check the set temperature. If the
power supply is set to “OFF”, and then set to
“ON”, the temperature of supplied hot water
is displayed.
1. Check that electrical power is connected.
Setting and Using the Water Heater
Indicates the burner is on.
Indicates the burner is off.

Owner’s Guide
13
Operation (Using the optional Remote Controller)
1. The Operation button is ON.
(e.g. 40°C)
• The Operation indicator is displayed.
• The previously set hot water supply
temperature is shown.
2. Set the temperature using the ↑/↓buttons.
NOTE • Check the temperature displayed
before using any hot water.
Be especially careful using hot
water after the set temperature
has been changed.
• For most residential applications,
the recommended setting
temperature is 50°C or less.
For applications that occasionally
require a higher temperature
setting, locate the remote
controller in a convenient location.
• While using hot water, the set
temperature can be lowered to
minimum of 37°C. For safety, it
cannot be raised above 43°C until
all hot water taps are closed. (For
some products)
3. Turn on hot water.
• Turn off hot water, the Burner on indicator
disappears.
Temperature Setting Options
The temperature settings below are examples. The
temperature setting necessary depends on the
usage, the length of piping and the season.
(Default setting is 40°C)
37°C Washing dishes,
etc.
(Bathroom and
Bathroom 2 controller
are these ranges.
[50 degree models:
Main and Bathroom
and Bathroom 2
controller are these
ranges.])
38°C
39°C
Shower, hot
water supply, etc.
40°C
41°C
42°C
43°C
44°C
Hot water supply,
etc.
45°C
46°C
47°C
48°C
50°C
55°C
High temperature*2 60°C
70°C *1
*1 26ENG series only
*2 Display when high temperature is set
(e.g. 60°C)
Flashing
for 10 seconds
NOTE If the set temperature requires
frequent adjustment, locate the
Remote Controller in an easily
accessible location.
Priority indicator is displayed.
Burner on indicator is displayed
during combustion.

Owner’s Guide
14
Operation
When the temperature cannot be
adjusted, follow the procedure below.
1. Press and hold the Priority button.
1. Turn off the Operation button.
2. Turn on the Operation button once again.
For Bathroom Controller
For Main Controller and Bathroom 2 ControllerHot water supplied from this Water Heater is
delivered to the kitchen, bathroom, and shower,
etc. at the same temperature.
The water temperature can only be changed by one
remote controller if multiple remote controllers
are installed.
Only the controller with the priority light
illuminated will be able to adjust the temperature
of the Water Heater.
• The remote controller on which the operation
button is turned “ON” has priority.
• If the Bathroom or Bathroom 2 controller has
priority left ON, press OFF and ON any other
controller to transfer priority to that controller.
This function cannot be changed while the Water
Heater is producing hot water.
• The Operation indicator is displayed.
• The Operation indicator disappears.
NOTE Operation will be interrupted so
please be careful.
Controller Priority Function
(e.g. ECM1D)
Priority indicator is displayed.
Priority indicator is displayed.

Owner’s Guide
15
Customizable Settings
Muting the Remote Controller
The Remote Controller will
emit a sound when any button
is pressed. This sound can be
muted if needed.
1. Press and hold the
Operation button for 5
seconds.
Operation
Bath Fill Function
When the bath has reached the volume set on the controller, an alarm
sounds and the hot water supply will stop automatically.
5. Turn on hot water.
6. Turn off the hot water when
the alarm sounds.
• The bath fill and the call
function alarm cannot be
muted.
• When the bath fills with
the preset volume of
water, the water will stop
and an alarm will sound.
(Default setting = Sound ON)
1. The Operation button is ON.
3. Set the temperature using
the ↑/↓buttons.
2. Press the Bath fill button.
Operation
• Check the current setting
temperature.
• The bath fill temperature
will flash. After 10
seconds, it will be
displayed.
• The bath fill volume
setting will flash.
* Bath fill volume options
may change depending
on the continuous flow
models.
• The level can only be
adjusted while the bath fill
volume setting is flashing.
• After 10 seconds, the
Remote Controller
will again display the
temperature.
• (For Bathroom controller)
To alter the bath fill
volume press the Priority
button after the Bath fill
button.
• When using hot water at
another hot water outlet,
also turn it off.
• [When you turn off the
hot water supply]
Bath fill temperature
indicator turns off. (within
approx. 1 minute)
• [If you do not turn off the
hot water supply]
The equipment
automatically runs the
water to check if the hot
water supply has been
turned off.
• [When approx. 10
minutes passes without
turning off the hot water
supply the sound is
played]
The screen “oFF” appears,
so turn off all the hot
water supplies and then
press the Bath fill button.
• The setting temperature
becomes the bath fill
temperature after the
bath fill was used.
• Button operation may not
be accepted at the end of
bath fill.
4. Press the Set volume
button, and adjust with the
↑/↓buttons.
(Default setting = 160 L)
40- 80 L (In 20 L intervals),
120- 200 L (In 40 L intervals),
250- 650 L (In 50 L intervals)
[Muted]
No sound after 5 seconds
[Sound ON]
Sounds after 5 seconds

Owner’s Guide
16
The call button can be used to sound an alarm at
the Main Controller.
Operation
1. Press the Call button.
• The alarm sounds for as long as the button is
pressed.
• The Call button can be used regardless of
whether the Operation button is turned “on”
or “off”.
Call Function (For Bathroom Controller only)

Owner’s Guide
17
Frost Protection
* Outside temperature including wind chill factor
less than-15°C.
Freezing cannot be prevented when the power plug
is unplugged. Do not remove the power plug from
the wall outlet.
Freezing will be prevented regardless of whether
the Operation button is ON or OFF.
The freeze prevention heaters will not prevent
the plumbing external to the Water Heater from
freezing. Protect this plumbing with insulation, heat
tape or electric heaters, solenoids, or pipe covers.
Freezing is prevented within the
device automatically by the freeze
prevention heater.
This method can protect not only the Water Heater,
but also the water supply, water piping and mixing
valves.
1. Turn off the Operation button.
2. Close the gas supply valve.
3. Open a hot water fixture, and keep a small
stream of hot water running. (400 mL/minute or
about 4 mm thick.)
• If there is a mixing
valve, set it to the
highest level.
4. The flow may become unstable from time to
time. Check the flow 30 minutes later.
• In general, it is not advisable to run water
through the Water Heater when it is OFF (See
page 5), but in this case freeze prevention is
more important.
Take the measures below for
extremely cold temperatures*.
If water will not flow due to freeze
1. Close the gas and water valves.
2. Turn off the Operation button.
3. Open the water supply valve occasionally to
check whether water is running.
4. When the water is flowing again, check for
water leaks from the Water Heater and piping
before using.
NOTE If the Water Heater or the piping
is frozen, do not use the Water
Heater or it may get damaged.
4 mm thick
Hot water fixture
• Damage can occur from frozen water within
the appliance and pipes even in warm
environments. Be sure to read below for
appropriate measures.
• Repairs for damage caused by freezing are not
covered by the warranty.
NOTICE

Owner’s Guide
18
If the water heater will not be used for
a long period of time, drain the water.
Turning the Unit Back On
• To prevent damage from freezing, the water
heater must be plugged into power at all
times. If power is unplugged, drain the water
completely from the water heater. Then use an
air compressor to remove all water from inside
the unit’s water piping.
It is recommended that Isolation Valves are
installed on the water heater, otherwise the
water connections will need to be removed to
drain the unit completely. Freeze damage due to
not draining properly will not be covered under
warranty.
• Drain water into a bucket to prevent water
damage.
1. Check that all drain plugs are inserted.
2. Check that all hot water fixtures are closed.
3. Follow the procedure on page 10 “Initial
operation”, steps 1 through 4.
* If water does not appear at the end of the drain
line, a qualified service technician must clean the
condensate line.
To avoid burns, wait until the equipment cools
down before draining the water. The appliance
will remain hot after it is turned off.
CAUTION
1. Close the gas supply valve.
2. Turn and leave open the hot water fixtures for
more than 2 minutes and close.
* When the remote
controller is installed, set
“Operation Button ON”.
Turn and leave open the
hot water fixtures for
more than 2 minutes and
close.
(An 11 Error Code may
appear on the remote controller. This is not a
malfunction of the unit. Do not turn Operation
Button OFF.)
3. Close the water supply valve and disconnect the
electrical power supplied to the unit.
Hot water fixture
Do not touch with wet hands.
5. Open all drain plugs and drain the water out of
the unit.
6. When the water is completely drained, replace
all drain plugs and close the hot water fixtures.
4. Fully open all hot water
fixtures.
Hot water fixture
Drain Plugs: Each drain plug might not be visible if
insulation is installed around the piping.
(17/21ENB series)
(26ENG series)

Owner’s Guide
19
Regular Maintenance
Periodic Inspection
This Water Heater should be serviced by an
authorised person at regular intervals not exceeding
2 years.
Check : A
For dust and soot in the flue exhaust.
Check : B
• For abnormal sounds during operation.
• For abnormalities in external appearance,
discolouration or flaws.
Check : C
For dust or debris in the air inlet.
Check : D
For water leaks from the Water Heater and piping.
Check
For laundry, newspaper, timber, oil, spray cans
and other combustible materials near the Water
Heater.
Periodic Maintenance
Wipe the outside surface with a wet cloth, then dry
the surface. Use a neutral detergent to clean any
stains.
Water Heater
Wipe the surface with a wet cloth.
Remote Controller
NOTE • Do not use chlorine-based,
acidic, alkaline detergents,
organic solvents such as benzine
and thinner, or Melamine
Sponge to clean the Remote
Controller.; discolouration,
deformation, scratches or cracks
may occur.
• ECB1D and ECB2D are water
resistant but not water proof.
Keep it as dry as possible.
ECM1D is not water resistant.
To prevent burns or scalding, turn off the
Operation button and wait until the appliance
cools before performing maintenance.
WARNING
(e.g. 26ENG5N)
A
C
B
D

Owner’s Guide
20
Inlet water filter
If the inlet water filter is covered with debris, the
hot water may not run smoothly, or the Water
Heater may put out cold water. Check and clean the
filter as explained below.
To prevent burns or scalding, turn off the
Operation button and wait until the appliance
cools before draining the water.
WARNING
1. Close the water supply valve.
NOTE Do not lose the Sealing.
2. Open all hot water fixtures.
3. With a bucket ready, remove the inlet water
filter. (about 1 L will drain out)
4. Clean the inlet water filter with a brush under
running water.
5. Reattach and close inlet water filter.
6. Close all hot water fixtures.
7. Open the water supply valve and check that
water does not leak from the inlet water filter.
(e.g. 26ENG5N)
Sealing
Inlet water filter
Water Supply Valve