Takagi GS-2000W-AU User manual

Installation Guide
GAS WATER HEATERS
GS-2000W-AU / GS-2600W-AU
FOR EXTERNAL INSTALLATION ONLY

2
CONTENTS
IMPORTANT ...........................................................2
FOR THE INSTALLER .............................................2
FOR THE SERVICER...............................................2
FOR THE PLUMBER ..............................................3
SPECIFICATIONS .....................................................3
INTRODUCTION......................................................4
DIMENSIONS AND CONNECTION POINTS .............. 5
SAFETY GUIDELINES...............................................6
INSTALLATION ........................................................ 7
CONFIRM THE APPLIANCE SUITABILITY ...............7
ABOUT SELECTING INSTALLATION LOCATION......8
CLEARANCES FOR OUTDOOR
HEATER LOCATIONS – AS5601 .............................9
GAS CONNECTION................................................10
SIZING AND CONNECTING ..................................10
MEASURING INLET GAS PRESSURE
AND TESTING GAS LEAKAGE...............................11
WATER CONNECTIONS.........................................12
ELECTRICAL CONNECTION ...................................13
REMOTE CONTROLLER (OPTIONAL) ....................14
REMOTE CONTROLLER INSTALLATION ...............15
CONNECTION OF REMOTE CONTROLLER
WIRING TO THE WATER HEATER........................16
INITIAL OPERATION ..............................................17
NORMAL OPERATION ...........................................18
WITHOUT REMOTE CONTROLLER.......................18
WITH ONLY MAIN
REMOTE CONTROLLER........................................18
WITH MULTIPLE REMOTE CONTROLLERS ...........19
FREEZE PREVENTION ............................................20
WINTER SHUT DOWN..........................................20
MAINTENANCE AND SERVICE...............................21
UNIT DRAINING and FILTER CLEANING...............21
GENERAL TROUBLESHOOTING .............................22
PCB ERROR CODES ................................................24
WIRING DIAGRAM ................................................25
OPERATING SAFETY ..............................................26
WATER FLOW AND
WATER TEMPERATURE..........................................28
WARRANTY CONDITIONS .....................................28
IMPORTANT
This User Guide has been prepared for Installers and Servicers of the equipment. Please keep it in a safe
place for future reference.
FOR THE INSTALLER
The installaon must be done in accordance with the informaon supplied in this User Guide. All other
relevant Naonal, State or Local regulaons must also be conformed with and these include (but are not
limited to):
• Australian Standard AS3500.1 – Water Supply
• Australian Standard AS3500.4 – Hot Water Supply
• AustralianStandardAS3000–ElectricalInstallaons
• AustralianStandardAS5601–GasApplianceInstallaon
• LocalWater,Gas&ElectricalAuthorityRegulaons
• Municipal Building Codes
FOR THE SERVICER
Maintenance and fault-nding must be done in accordance with these instrucons and the applicable
regulaons listed above.
WARNING
Installaon and service must be performed by a qualied installer (for example, a licensed
plumber or gas er).

3
FOR THE PLUMBER
PLEASE NOTE this water heater is supplied factory set at 50 °C outlet hot water temperature to comply with
the requirements of AS 3498.2009.
If the water heater is not preset to 50 °C, tempering valve is required.
Please follow all the installaon instrucons in the Installaon and operang instrucons handbook and the
following addional instrucons for the water heater outlet connecon.
1. When connecng the hot water supply to the xtures
in the property a minimum of 1.4 metres of pipe-
work must be used between the outlet of the water
heater and the rst tap and outlet. See Diagram to the
right.
2. The Hot water line should be insulated with Ensolex or
similar pipe insulaon.
3. When the installaon is completed the temperature is
to be tested at the taps to conrm the water tempera-
ture does not exceed the required 50°C seng.
• Total length to
rst tap or outlet
is required to be a
minimum of 1.4
metres from the
outlet connecon of
the water heater.
• Pipe size is nominal
18 mm from hot
water outlet to the
rst tap or outlet.
First tap or outlet
SPECIFICATIONS
MODELS GS-2000W-AU GS-2600W-AU
Gas Input MJ/h 160 195
Inlet Pressure
kPa – Nat. Gas
1.13 min.
2.75 max.
1.13 min.
2.75 max.
Inlet Pressure
kPa - LPG 2.75 min./max. 2.75 min./max.
Water Supply Pressure
kPa
150* min.
1200 max.
150* min.
1200 max.
Height mm 542 542
Depth mm 170 215
Width mm 350 350
Weight kg 15.7 17.2
Gas Connecon mm 20 BSP 20 BSP
Water Connecons 15 BSP 15 BSP
Ignion Electronic Electronic
Electrical Supply V 240 AC 240 AC
NOTES:
* The appliance will operate at reduced performance below 340 kPa.
• For informaon relang to burner test point pressures and injector sizes, refer to the rang plate
located on the right hand side of the cabinet for each model. (Please refer to p. 7.)
• For informaon relang to overall dimensions and connecon points refer to diagrams. (Please refer
to p. 5)
• Before installing in areas over 1500 m above sea level, contact the manufacturer for instrucons.

4
INTRODUCTION
• This manual provides informaon necessary for the installaon, operaon, and maintenance of the
water heater.
• The model descripon is listed on the rang plate which is aached to the right side of the casing of the
water heater. (Please refer to p. 7.)
• Please read all installaon instrucons completely before installing this product.
• The Water Heater is an instantaneous, tankless water heater designed to eciently supply endless hot
water for your needs.
• The principle behind the water heater is simple:
Burner
H e a t e x c h a n g e r
E x h a u s t
F l o w s e n s o r
T h e r m i s t o r
Compu t er
board
A C 2 4 0 V
G a s v a l v e
Fan
C o l d w a t e r i n l e t
G a s
H o t w a t e r o u t l e t
*This diagram shows the main components
only and it is not to scale.
1. A hot water tap is turned on.
2. Water enters the heater.
3. The water ow sensor detects the water ow.
4. The computer automacally ignites the burner.
5. Water circulates through the heat exchanger and it gets heated.
6. The computer will modulate the gas supply valve and water ow to produce the right amount of
hot water at the correct temperature.
7. When the tap is turned o, the unit shuts down.

5
ACCESSORIES
Check that the installaon manual and screws are included with the unit.
Screws × 4 Manual
DIMENSIONS AND CONNECTION POINTS
GAS
C O L D
H O T
G A S
HOT
COLD
1 9
3 7
3 3 0
3 5 0
4 9 0
1 2 41 3 3
3 3 5
4 4 .5
G A S
5 2 0
4 1 H O T
4 9 C O L D
1 9 8
6 0
9 4
2 1 5
182
5 4 2
1 5 .7
8 4 3 4
POW E R
2 5 P O W E R
GS-2600W-AU
GAS
COL D
HOT
GA S
HOT
CO LD
13 3 12 4
47 G A S
33 0
35 0
52 0 49 0
37
198
60
94
335
79
19
41 H O T
49 C O L D
170
15 .7
54 2
137
31 P OW E R
POW E R
46:COLD
86 :G A S
1 1 4 : H OT
12 4: P O W E R
34
GS-2000W-AU

6
SAFETY GUIDELINES
Ensure the following safety instrucons are read and understood before commencing installaon.
WARNING
• Installaon and service must be performed by a qualied installer (for example, a licensed
plumber or gas er).
• The installer (licensed professional) is responsible for the correct installaon of the water
heater and for compliance with all relevant Naonal, State or local regulaons.
• The water heater must be installed OUTDOORS ONLY. DO NOT install the water heater
indoors.
GENERAL
1. Carefully plan where you intend to install the Water Heater. Please ensure:
• The water heater will have enough combusble air and proper venlaon.
• Locate the water heater where water leakage will not damage surrounding areas.
2. Check the rang plate and gas type label for the correct GAS TYPE, GAS PRESSURE, WATER PRESSURE
and ELECTRIC RATING.
*If this unit does not match your requirements, do not install and consult with MANUFACTURER.
3. If any problem should occur, turn off all hot water taps and turn off the gas. Then call a trained
technician or the Gas Company or the manufacturer.
WARNING
• Water temperatures above 50 °C can cause severe burns or death from scalding. Children,
the disabled and the elderly are at a high risk of being injured. Feel the water temperature
before bathing or showering. Do not leave children, disabled persons, or the elderly
unsupervised. The Australian Standards AS 3498 gives full details of the requirements for
supply of controlled temperature to abluon outlets (bathrooms) and is required to be
conformed to under all plumbing codes within Australia.
• Do not store or use gasoline or other ammables, vapors, or liquids in the vicinity
of this appliance.
• Do not reverse the water and/or gas connecons as this will damage the gas
valves and can cause severe injury or death. Follow the diagram on p. 10 and 12
when installing your water heater.
• Do not use this appliance if any part has been in contact with or been immersed
in water. Immediately call a licensed plumber, a licensed gas er, or a professional
service technician to inspect and/or service the unit if necessary.
• Do not disconnect the electrical supply if the ambient temperature will drop
below freezing. The Freeze Prevenon System only works if the unit has electrical
power. The warranty will not be covered if the heat exchanger is damaged due to
freezing. Refer to the secon on the Freeze Prevenon System on p. 20 for more
informaon.
Prohibited

7
INSTALLATION
The water heater requires careful and correct installaon to ensure safe and ecient operaon. This man-
ual must be followed exactly. Read the “SAFETY GUIDELINES” (p.6) and the “IMPORTANT” (p.2) secons at
the beginning of this manual.
CONFIRM THE APPLIANCE SUITABILITY
Check the gas type label and the rang plate for the correct gas type, gas pressure, water pressure and
electrical rang for your applicaon. Do not install this unit if these requirements can’t be met.
Gas Type Label
Posion on Cabinet
Rang Label
Posion on Cabinet
CAUTION
• This equipment is not suitable for pool or spa heang.
• Water hardness may aect the water heater. It may be damaged.
• It is important that the water heater is installed in water condions that are suitable for
its ecient, long use.
• This is a water heang apparatus only and the nal quality of water delivered is dependent
upon the quality of water supplied to this system.
• The connecon, aachment, integraon or general associaon of other equipment or
parts not specied by the water heater which either directly or indirectly aect the
operaon or performance of this equipment – could void the warranty.
• The manifold pressure is preset at the factory. It is computer controlled and should not need
adjustment.
• Occupants are to be advised of any inconveniences which could occur such as disconnecon of services.
• The installer must follow the electrical earthing procedure outlined in AS3500.4 before cung or
uncoupling exisng metallic pipework.
• It should be as close as praccal to the hot water outlets to minimise heat loss and cost.
• The water heater does not require a reproof back plate if installed on mber wall.

8
ABOUT SELECTING AN INSTALLATION LOCATION
CAREFULLY READ THIS SECTION BEFORE INSTALLING THE WATER HEATER. WHEN A LOCATION
FOR INSTALLATION HAS BEEN SELECTED, THESE PRECAUTIONS MUST BE FOLLOWED EXACTLY.
CAUTION
• This is a water heang apparatus only and the nal quality of water delivered is dependent
upon the quality of water supplied to this system.
• Although the water heater is designed to operate with minimal sound, you should not
install the unit on a wall adjacent to a bedroom, or a room that is intended for quiet
study or meditation, etc.
• Locate your heater close to a drain where leakage WILL NOT DAMAGE SURROUNDING
AREAS. As with any water heang appliance, the potenal for leakage at some me in life
of the product does exist.
WARNING
• Every care is taken to warn THE PUBLIC AND THE OCCUPANTS OF THE BUILDING OF ANY
RISK OF INJURY that may occur from falling tools, open trenches, water connecons or any
other general hazard.
• Make sure the water heater will have enough combuson air and proper venlaon.
• Keep the area around the water heater clean. Parcles may clog the air vent, reduce fan
funcon, or cause improper combuson.
• Locate unit for easy access and maintain proper space for service and maintenance. Install
the unit so that it can be connected or removed easily.
• The water heater must be installed outdoors only. Do not install the water heater
indoors.
• Do not locate your water heater in a pit or any locaon where gas and water can accumulate.
• Check the proximity of gas & electrical lines so as not to create a hazard and avoid access problems for
other services.
• Heater must be located in accordance with the requirements of AS5601 and have sucient clearances
from eaves, windows, vents etc. – see the diagram on p. 9.
• “Exempon from Prescribed Statutory Requirement”: AS5601 Clause 5.13.6.5. This relates to the
physical separaon distance specicaon where mulple appliances are employed. That equates to
a minimum 150 mm horizontal ue separaon distance allowing appliances to be placed side by side in
the same vercal plane.
• Most load bearing walls such as brick, brick/veneer, weatherboard and stud-frames are suitable
locations.
• Securely fasten the unit to the wall with screws or bolts in the top and boom brackets. A minimum of
two screws on the top and at the boom must be used.

9
CLEARANCES FOR OUTDOOR HEATER LOCATIONS – AS5601
Below eaves, balconies and other projecons:
・Appliances up to 50MJ/h input
・ Appliances over 50MJ/h input
From the ground, above a balcony or other surface*
From a return wall or external corner*
From a gas meter (M) (see 5.11.5.9 for vent terminal locaon of regulator)
From an electricity meter or fuse box (P)
From a drain or soil pipe
Horizontally from any building structure* or obstrucon facing a terminal
From any other flue terminal, cowl or combuson air intake*
Horizontally from an openable window, door, non-mechanical air inlet, or any other opening
into a building with the excepon of sub-floor venlaon:
・Appliances up to 150 MJ/h input
・Appliances over 150 MJ/h input up to 200 MJ/h input
・Appliances over 200 MJ/h input
・All fan-assisted flue appliances in the direcon of discharge
Openable
window
From a mechanical air inlet, including a spa blower
Vercally below an openable window, non-mechanical air inlet, or any other opening into a building
with the excepon of sub-floor venlaon:-
・Space heaters up to 50 MJ/h input
・Other appliances up to 50 MJ/h input
・Appliances over 50 MJ/h input up to 150 MJ/h input
・Appliances over 150 MJ/h input
Ref. Item
Minimum clearances
(mm)
Natural
dra Fan assisted
300
500
300
500
1000
500
150
500
500
200
300
300
300
1000
500
75
500
300
500
1500
1500
300
500
1500
1500
1000
1500
150
500
1000
1500
150
500
1000
1500
f
c
n
j
jj
k
k
h
h
h
ee
d
d
b
c
a
g
See note 3
T
T
T
g
See note 2
I
Door
P
M
a
b
c
d
e
f
g
h
j
k
n
T = Flue terminal
I = Mechanical air inlet
M = Gas meter
P = Electricity meter or fuse box Shading indicates prohibited
areas for flue terminals
*- unless appliance is cerfied for closer installaon.
Note:
1 All distances are measured to the nearest part of the terminal.
2 Prohibited area below electricity meter or fuse box extends to ground level.
3 See Clause 5.13.6.6 for restricons on a flue terminal under a covered area.
4 See Appendix J, Figures J2(a) and J3(a), for clearances required from a flue terminal to an LP gas cylinder.
A flue terminal is considered to be a source of ignion.
5 For appliances which are not menoned above, comply with local regulaon.
Exemption from prescribed statutory requirements referred to in Figure 1 has been granted to allow
multiple series of the Water Heaters to be positioned side by side.

10
Power cord
Gas supply inlet
Gas valve
GAS CONNECTIONS
CAUTION
1. Turn o the electric power to the water heater and
manual gas valve located on the outside of the unit
before beginning gas connecon.
2. Conrm the posion of the gas inlet. Do not
connect water line to gas inlet. It may be crically
damaged.
SIZING AND CONNECTING
Check the gas type label to make sure that the water heater is available for your gas, and that the gas inlet
pressure is within the appropriate range. (Please refer to p. 3.)
1. Gas pressure below this specied range for the water heater and/or insucient gas volume will ad-
versely aect performance.
2. Inlet gas pressure must not exceed the above maximum values; gas pressure above the specied range
will cause dangerous operang condions and damage to the unit.
3. Unl tesng of the main gas line supply pressure is completed, ensure the gas line to the water heater
is disconnected to avoid any damage to the water heater.
• Size the gas piping for the water heater according to AS5601 installaon code.
• Always use approved connectors to connect the unit to the gas line. Always purge the gas line
of any debris before connecng to the water heater.
• Install a manual gas shut-o valve between the water heater and the gas supply line.
• The regulator is preset at the factory. It is computer controlled and is not to be adjusted by any
person other than a qualied Service Provider.
• When the gas connections are completed, it is necessary to perform a gas leak test either
by applying soapy water to all gas fittings and observing for bubbles or by using a gas
leak detection device.
WARNING
Conversion of this unit from natural gas to propane or propane to natural gas cannot be done in
the eld. Contact your local retailer or distributor to get the correct unit for your gas type.

11
MEASURING INLET GAS PRESSURE
AND TESTING GAS LEAKAGE
The appliance and its gas connections must be tested for leak and the inlet gas pressure must be
measured before placing the unit in operation for properly performing and safety. This is only to be
done by a licensed professional.
1. Shut o the manual gas valve on the supply gas
line.
2. Open a faucet. The unit should turn on and the
gas in the gas pipe line should purge. Leave the
faucet open to keep the unit running unl the
unit shuts down due to lack of gas supply. Then
shut the faucet o.
3. Remove the screw for the pressure port located
on the gas inlet of the water heater shown in
the diagram to the right.
4. Connect the manometer to the pressure port.
5. Re-open the manual gas valve. Check to see
that there are no gas leaks.
6. Open some of the xtures that use the highest
ow rate to turn on the water heater.
7. Check the inlet gas pressure. When the water
heater is on a maximum burn, the inlet gas
pressure within must be within the appropriate
range. (Please refer to p. 3.)
• This appliance and its individual shut-o valve must be isolated from the gas supply by unplugging the
unit and turning o the main gas valve during any pressure tesng of the gas supply piping system at
test pressures above 3 kPa.
1. Remove the screw for the pressure port
located on the gas inlet.
2. Connect the manometer to the pressure
port.
3. Check the inlet gas pressure.

12
WATER CONNECTIONS
Drain plug
Filter
Hot water
outlet
Cold water
inlet Gate or ball
valve on inlet
WARNING
Do not reverse the hot outlet and cold
supply line connecons to the Water
Heater as this will cause your heater to
operate improperly.
• All pipes, pipe ngs, valves and other components, including soldering materials, must be suitable for
potable water systems.
• A manual shut o valve must be installed on the cold water inlet to the water heater between the main
water supply line and the water heater.
• Only a gate valve or a ball valve is to be used on the cold water supply.
• No stop taps or check valves are to be used as this will void the warranty and damage the water heater.
• Check the cold water pressure and if above 1000 kPa, an approved pressure liming valve must be
ed.
• Before installing the water heater, ush the water line to remove all debris, and aer installaon is
complete, purge the air from the line. Failure to do so may cause damage to the heater.
• There is a wire mesh lter to discourage debris from entering your heater. Clean lter aer inial
installaon to ensure no debris from the pipe work has clogged it.
3. REMOVE BY TURNING
COUNTERCLOCKWISE
AND THEN CLEAN AND
REPLACE
1. TURN OFF THE WATER
INLET SUPPLY VALVE.
2. OPEN A HOT WATER
TAP TO RELEASE THE
LINE PRESSURE.
lter
NOTE: This lter must be cleaned as part of regular maintenance.

13
ELECTRICAL CONNECTION
1. The water heater must be electrically grounded. Do not aach the
ground wire to either the gas or water piping.
2. The water heater requires an AC 240V 50Hz electrical power supply and
draws a current of 0.8A.
3. The weather-proof power point should be no more than 1 metre from
the base of the water heater for easy access.
4. Install so that the electrical power can be switched o if necessary.
5. If the cord supplied with this appliance must be replaced, it must be
replaced with appliance wiring material supplied by the Manufacturer.
Weather-proof
Power Point
WARNING
When servicing or replacing parts within the water heater, label all wires prior to disconnecon
to facilitate an easy and error free reconnection. Wiring errors can cause improper and
dangerous operaon. Verify proper operaon aer servicing.

14
REMOTE CONTROLLER (OPTIONAL)
The water heater can be installed with up to three remote controllers. Each remote controller has two
funcons which can adjust the set temperature and indicate the error code on the remote controller.
• The set temperature can be adjusted only by a remote controller which has the priority seng (when a
remote controller has the priority seng, PRIORITY lamp on the remote controller is lit), and the other
remote controller(s) display the set temperature. If you desire to transfer the priority seng, you can
transfer it by pressing the PRIORITY buon only when there is no water ow through the water heater.
(Default set temperature is 40 °C.)
• All water heater models have a self diagnosc funcon for safety and convenience when troubleshoong.
If there is a problem with the installaon or the unit, it will display a numerical error code on the
remote controller (or the LED of the computer board will blink.)
MAIN REMOTE CONTROLLER (MODEL: MC100-AU3-TP)
• Location-MC100-AU3-TP must be installed in dry, shaded and
clean locations (such as kitchen) due to NO water resistant. Be
careful of installation location.
• The controller can adjust the output water temperature within the
range of 37 °C to 55 °C.
• The temperature opons are:
37 °C, 38 °C, 39 °C, 40 °C, 41 °C, 42 °C, 43 °C, 44 °C, 45 °C, 46 °C, 47
°C, 50 °C, 55 °C.
• When “BURNER ON” lamp is lit, the set temperature can not be
adjusted to 55 °C. If you desire to set it to 55 °C, you should close
the hot water tap.
SHOWER CONTROLLER (MODEL: FC100-AU3-TP)
AND ENSUITE CONTROLLER (MODEL: SC100-AU3-TP)
• FC100-AU3-TP and SC100-AU3-TP controllers are water resist-
ant, however should not be posioned where they can be splashed
directly and there should be caulking between the surface of the
wall and the controller.
• FC100-AU3-TP is installed such as the main bathroom, and
SC100-AU3-TP is installed such as the ensuite bath room.
• These remote controllers allow the output temperature from the
water heater to be adjusted within the range of 37 °C to 50 °C.
• The temperature opons are:
37 °C, 38 °C, 39 °C, 40 °C, 41 °C, 42 °C, 43 °C, 44 °C, 45 °C, 46 °C,
47 °C, 50 °C.
• When BURNER ON lamp is lit, the set temperature can not be ad-
justed to 42 °C or over. If you desire those temperatures, you should
close the hot water tap.
Main
Shower
Ensuite
MC100-AU3-TP
FC100-AU3-TP
SC100-AU3-TP

15
Connector base
WARNING
• DO NOT locate the remote controllers where they may come into contact with water.
• DO NOT posion the remote controllers in the vicinity of chemicals.
• DO NOT posion the remote controllers over a cooker, grill or toaster.
• DO NOT posion the remote controllers where materials may spill onto them.
• PLEASE NOTE IF THE CONTROLLERS ARE TO BE FITTED TO A METAL SURFACE, AN INSULA-
TION PLATE SHOULD BE PROVIDED BEHIND THE MOUNTING POSITION.
REMOTE CONTROLLER INSTALLATION
1. Crimp the fork terminals to the wires.
• Minimum 18AWG wire (No polarity)
• Maximum 100m long
2. ATTACH THE FORK TERMINAL TO THE CONNECTOR BASE AT
THE BACK OF THE UNIT BY TIGHTENING THE 2 SCREWS.
3. Draw the cable through the groove in the base plate.
4. Fix the remote controller to the wall using suitable screws
and wall anchors.
5. Connect the cable to the two terminals on the back
of the controller (connecons are not polarity sensive).
Ensure the connecng screws are seated ghtly.
Use the fork terminals
25 mm
45 mm
REMOTE CONTROL WIRING
83.5 mm

16
CONNECTION OF REMOTE CONTROLLER WIRING
TO THE WATER HEATER
1. Turn o the power supply to the water heater.
2. Remove the front cover from the water heater. There are 3 screws on the front cover.
3. Put the remote wires through the hole on the boom of the unit’s casing.
4. Remove the plasc cover and connect the remote control wires to the remote terminals directly.
(There is no polarity in the terminaons.)
*DO NOT jump or short-circuit wires as it will damage the computer.
5. Replace the plasc cover and the front cover. Then connect the power plug.
1 2 3 4 5 6 7 8
PL AS TI C
CO VE R REMOTE CONTROL
CABLE
RE MO TE C O NTR O L
TE RM IN AL
RE MO VE T HE PL A ST IC CO VE R
AN D CO NN EC T TO T ERMI NA LS
DI RE CT LY B EH IN D TH E CO VE R
REMOTE CONTROLLER – CABLE CONNECTIONS
Put the remote wires through the
hole on the boom of the unit’s
casing.
1 2 3 4 5 6 7 8
TYPICAL CABLE LAYOUT
FC100-AU3-TP SC100-AU3-TP
MC100-AU3-TP

17
FOR YOUR SAFETY, READ BEFORE OPERATING:
• Check the GAS and WATER CONNECTIONS for leaks before ring it for the rst me.
• Open the main gas supply valve to the unit using only your hand to avoid any spark. Never use
tools. If the knob will not turn by hand, do not try to force it; call a qualied service technician.
Forced repair may result in a re or explosion due to gas leaks.
• Be sure to check next to the boom of the unit because some gases are heavier than air and
may sele towards the oor.
• Check the GAS PRESSURE. Refer to p. 11.
• Do not try to light the burner manually. It is equipped with an electronic ignion device which
automacally lights the burner.
• Check for PROPER VENTING and COMBUSTIBLE AIR to the heater.
• Purge the GAS and WATER LINES to remove any air pocket.
• Do not use this water heater if any part has been submersed under water. Immediately call a
qualied service technician to inspect the water heater and to replace any damaged parts.
CAUTION: IF YOU SMELL GAS:
• Do not try to start the water heater.
• Do not touch any electric switch; do not use any phone in your building.
• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s
instructions.
• If you cannot reach your gas supplier, calltheredepartment:“000”
INITIAL OPERATION
1.Once the above checks have
been completed, please clean lter
of any debris. Refer to p. 21 for
instrucons.
2. Fully open the manual water
control valve on the water supply
line.
3. Open a hot water tap to verify
that water is owing to that tap.
Then close the hot water tap.
4. Fully open the manual gas
control valve installed.
5.Turn on the 240 volt 50 Hz
power supply to the water heater.
6. Now you are ready to enjoy
hours of endless hot water.

18
NORMAL OPERATION
• Flow rate to acvate the water heater : 3.0 LITRES per minute
• Flow rate to keep the water heater running : 2.5 LITRES per minute
WITHOUT REMOTE CONTROLLER
1. Open a hot water tap. 2. Mix cold water with the hot to get
the suitable temperature water.
3. Close the hot water tap.
NOTE: The water temperature is set at 50 °C from the factory.
If you desire to change the set temperature without remote controller, refer to diagram below.
Temperature set
40 °C 45 °C 50 °C
DEFAULT 55 °C
60 °C Error 70 °C Error
8765
ON
OFF
TMP1 TMP2 TMP3
8765
ON
OFF
TMP1 TMP2 TMP3
8765
ON
OFF
TMP1 TMP2 TMP3
8765
ON
OFF
TMP1 TMP2 TMP3
8765
ON
OFF
TMP1 TMP2 TMP3
8765
ON
OFF
TMP1 TMP2 TMP3
8765
ON
OFF
TMP1 TMP2 TMP3
8765
ON
OFF
TMP1 TMP2 TMP3
• Only change the switches with dark squares.
• DO NOT adjust other switches.
WITH ONLY MAIN REMOTE CONTROLLER INSTALLED
1. Press the ON/OFF buon. And then ensure the priority lamp is
lit and displays the set temperature on the remote controller.
2. SET PREFERRED TEMPERATURE. WHEN ADJUSTING THE SET
TEMPERATURE, MC100-AU3-TP ALLOWS THE OUTPUT
TEMPERATURE FROM THE WATER HEATER TO BE ADJUSTED
WITHIN THE RANGE OF 37 °C to 55 °C. (Please refer to P. 14.)
3. Open a hot water tap, and ensure the BURNER ON lamp is lit.
Mix cold water with the hot if you need.
4. Close the hot water tap, and ensure the BURNER ON lamp is
OFF.
Priority
buon
ON/OFF
Set temperature
display
Set temperature
adjust buon
Burner on
lamp
lamp
Priority
buon
MC100-AU3-TP

19
WITH MULTIPLE REMOTE CONTROLLERS INSTALLED
Priority
buon
ON/OFF
Set temperature
display
Set temperature
adjust buon
Burner on
lamp
lamp
Priority
buon
FC100-AU3-TP
Priority
buon
ON/OFF
Set temperature
display
Set temperature
adjust buon
Burner on
lamp
lamp
Priority
buon
SC100-AU3-TP
1. Press the ON/OFF buon. Then ensure the priority lamp is lit
on the remote controller and the set temperature is displayed
on each remote controller.
2. Set desired temperature. (THE TEMPERATURE SETTING CAN
ONLY BE CHANGED BY THE PRIORITY UNIT. If you desire to
transfer the priority seng, you can transfer it by pressing PRI-
ORITY buon only if no water ow.)
When adjusng the set temperature with MC100-AU3-TP, it
allows the output temperature from the water heater to be ad-
justed within the range of 37 °C to 55 °C. And when adjusng
the set temperature with SC100-AU3-TP and FC100-AU3-TP,
it allows the output temperature from the water heater to be
adjusted within the range of 37 °C to 50 °C.
NOTE: Each remote controller can individually store the tem-
perature seng. However –
MC100-AU3-TP
WHEN THE PRIORITY SETTING IS TRANSFERRED TO
MC100-AU3-TP WHICH HAS A PREVIOUS TEMPERATURE SET-
TING OF 55 °C STORED, THE SETTING WILL BECOME 50°C.
FC100-AU3-TP , SC100-AU3-TP
When the priority seng is transferred to FC100-AU3-TP (or
SC100-AU3-TP) WITH A PREVIOUS TEMPERATURE SETTING
STORED OF 43 °C AND ABOVE, THE SETTING WILL BECOME 42
°C.
3. Open a hot water tap, and ensure the BURNER ON lamp is lit.
Mix cold water with the hot if you need.
4. Close the hot water tap, and ensure the BURNER ON lamp is
OFF.
WARNING
Water temperatures above 50 °C can cause severe burns or death from scalding. Children, the
disabled and the elderly are at a high risk of being injured. Feel the water temperature before
bathing or showering. Do not leave children, disabled persons, or the elderly unsupervised. The
Australian Standards AS 3498 gives full details of the requirements for supply of controlled
temperature to abluon outlets (bathrooms) and is required to be conformed to under all
plumbing codes within Australia.

20
FREEZE PREVENTION
This unit comes equipped with heaters that prevent the unit from freezing. For this freeze prevenon
system to operate, there has to be electrical power to the unit. The freeze prevenon devices will not
work if the electrical power source is disconnected. The unit has been rated for temperatures down to
-15 °C in a wind free environment. Do not install the water heater in an area with extremely cold weather.
CAUTION
The pipe heaters are located on the Water Heater only. Any hot or cold water pipes located
outside of the unit will not be protected. Properly protect and insulate these pipes from
freezing.
WINTER SHUTDOWN
If you will not be using your heater for a long period of me or if the temperatures will drop below -15 °C
with the wind chill factor, turn o your heater and drain the unit of water. This will keep your unit from
freezing and being damaged.
Followtheseinstruconscarefully:
Gas
Cold
Hot
Drain
plug Power
supply
Manual
water valve
Manual
gas valve
1. Close the manual gas shut o valve.
2. Turn o the power supply to the water heater.
3. Close the manual water shut o valve located on the water
supply line.
4. Open all hot water taps in the house. (Bathroom, kitchen,
laundry room, etc.). When the water ow has ceased, close
all hot water taps.
5. Have a bucket or pan to catch the water from the unit’s
drain plugs. Unscrew the drain plugs to drain all the water
out of the unit.
6. Wait a few minutes to ensure all water has completely
drained from unit.
7. Securely screw the drain plugs back into place.
Hand-ghtenonly.
When it is again safe to use the water heater:
• Make sure all hot water taps are closed and the drain plugs are securely aached.
• Purge the water line of debris.
• Turn on the manual water control valve located on the water supply line.
• Open all the hot water taps to verify water ows to the taps. Close hot water taps.
• Turn on the manual gas control valve located on the gas supply line.
• Turn on the power supply to the Water Heater.