Sanden Eco GAUS-160FQTS User manual

Owner's manual Eこ口〗Sanden Heat Pump Water Heater with Natural Refrigerant (CO2) Covering model numbers for residence GAUS-160FQS GAUS-250FQS GAUS-300FQS GAUS-315FQS GAUS-315FQV Heat PumQ Unit GAU-A45HPC • 
 3 
GAU-A45HPD
20937601 (K)
GAUS-160FQTS
GAUS-250FQTS
GAUS-300FQTS
GAUS-315FQTS
GAUS-315FQTV

Sanden Heat Pump - Owner’s Manual
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Sanden Heat Pump – Owner’s Manual
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Contents
Page title .............................................................................................................................. 1
Contents .............................................................................................................................. 2
Introduction .......................................................................................................................... 3
How it works ........................................................................................................................ 3
Installation details ................................................................................................................ 8
Trouble Shooting Guide ....................................................................................................... 9
Error Codes ....................................................................................................................... 10
Removing air from the system ........................................................................................... 11
Electrical connections ........................................................................................................ 12
System operation, if connected to continuous power ......................................................... 12
System operation if connected to off-peak electricity ......................................................... 12
How to connect power line and thermistor cable ............................................................... 13
Water Supply Quality ......................................................................................................... 14
Change of water supply ..................................................................................................... 14
Technical data ................................................................................................................... 15
Warranty Policy .................................................................................................................. 18
Warranty Period ................................................................................................................. 19
Registration for warranty .................................................................................................... 19
PATENTS
This water heater may be protected by one or more patents or registered designs
in the name of Sanden Australia Pty Ltd
TRADE MARKS
® Registered trademark of Sanden Australia Pty Ltd
.
Note: Every care has been taken to ensure accuracy in preparation of this publication.
No liability can be accepted for any consequences that may arise as a result of its application. No liability can be
accepted for any consequences that may arise as a result of its application. Sanden is in a process of
continuous improvement, therefore specifications may be different to those referenced in this manual – Please
contact Sanden International or its distributors for the latest specifications at the time of installation.

Sanden Heat Pump - Owner’s Manual
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Sanden Heat Pump – Owner’s Manual
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Introduction
The Sanden Heat Pump Water Heater System has been designed using the latest
refrigeration technology to remove the heat from the air to heat water. The refrigerant we
use is CO2 which does not contribute to global warming so it allows us to help keep a clean
healthy earth for future generations.
We have also considered the power requirement. By using CO2 as the refrigerant we have
produced one of the most energy efficient units currently available. It’s even more efficient
when connected to off-peak power and the noise level is so low it will operate
unobtrusively throughout the night.
How it works
The Heat Pump Water Heater System heats water by transferring the heat from the
surrounding air to the water using a refrigerant. The refrigerant is heated by a heat
exchanger that absorbs heat from the surrounding air (Figure 1).
Figure 1: Heat Pump Water Heater System
Note: Operating conditions may vary depending on the type of off-peak tariff that is
available in your area. The unit must have a minimum of 5 hours continuous power
available at all time to allow the unit to operate without affecting reliability.
63
We have also considered the power requirement. By using CO2as the refrigerant, we have
produced one of the most energy efcient units currently available. It’s even more efcient
when connected to off-peak power and the noise level is so low it will operate
unobtrusively throughout the night.
Note: Operating conditions may vary depending on the type of off-peak tariff that is
available in your area. The unit must have a minimum of 5 hours continuous power
available at all times to allow the unit to operate without affecting reliability.
The Sanden Heat Pump Water Heater System has been designed using the latest
refrigeration technology to remove the heat from the air to heat water. The refrigerant we
use is CO2 which does not contribute to global warming, so it allows us to help keep a clean
healthy earth for future generations.

Sanden Heat Pump - Owner’s Manual
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Sanden Heat Pump – Owner’s Manual
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Do not touch the tap while hot water is being
supplied

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Sanden Heat Pump – Owner’s Manual
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LPG
・Please contact the Dealer about insulating the pipes.
・Contact the Dealer for repair.

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Sanden Heat Pump – Owner’s Manual
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Check the installation conditions of the unit.
Installation of the unit in the following places could result
in accidents or failure and the performance of the unit
not being guaranteed.
·Anywhere the lowest temperature reached is below
minus 10 degrees centigrade
· Indoors (Applies only to the heat pump unit)
· Anywhere not completely flat, unstable or where
drainage is difficult
· Ensure not to put anything around the heat pump unit.
Could result in poor performance and unexpected
problems.
In the winter in particular please pay attention to any
snow coverage.
Could significantly i
nfluence performance and lead to failure.
Please select a place where noise an
d vibration while operating will
not bother your neighbours.

Sanden Heat Pump - Owner’s Manual
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Sanden Heat Pump – Owner’s Manual
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• Wipe the unit with a soft dry cloth and do not use chemical
items when cleaning.
• Do not use gasoline, benzene, thinners, or any polishing
compounds.

Sanden Heat Pump - Owner’s Manual
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This Sanden Eco Hot water Heat Pump System must be installed by a licensed person in
consideration of the following standards and regulations:
Figure 2: Typical installation layout
Installation details
• System contains refrigerant under very high pressure. The system must be serviced by qualified persons only.
• This appliance may deliver water at high temperature. Refer to the Plumbing Code of Australia (PCA), local
requirements and installaon instrucons to determine if addional delivery temperature control is required.
• If the hot water system is not used for two weeks or more, a quanty of highly flammable hydrogen gas may
accumulate in the water heater. To dissipate this gas safety, it is recommended that a hot tap be turned on for
several minutes or unl discharge of gas ceases. Use a sink, basin, or bath outlet, but not a dishwasher, clothes
washer, or other appliance. During this procedure, there must be no smoking, open flame, or any electrical
appliance operang nearby. If hydrogen is discharged through the tap, it will probably make an unusual sound
as air escaping.
▪ To be installed in accordance with the Plumbing Code of Australia (PCA).
▪ AS/NZS3500 National plumbing and drainage code hot water supply systems -
acceptable solutions. The Heat Pump component of the system is to be fitted outside.
▪ HB 263-2004 Heated water systems plumbing industry commission
▪
AS/NZS 3000 Electrical installations (known as the Australian/New Zealand wiring rules)
▪ Electrical requirements of the system are 230-240V, 50Hz, single phase, with 15Amp
circuit breaker. This appliance is to be wired with a disconnection device, as per
AS/NZS3000 wiring rules.”
▪ Notice to Victorian customers from the Victorian Plumbing Industry Commission.
The Victorian Building Act 1993 requires that this Heat Pump Water Heater System must
be installed by a licensed person. Only a licensed person will provide a Compliance
Certificate, showing that the work complies with all the relevant standards. Only a
licensed person will have insurance protecting their workmanship for six years.
▪ The unit has been specifically designed for domestic hot water heating and is not
suitable for any other purpose.
▪ The unit is designed to operate when connected to the town water supply with a
maximum operating pressure of 500 kPa. To ensure the mains pressure does not
exceed this, a pressure-limiting device that complies with AS1357 must be
connected to the town water supply line.
▪
This system delivers hot water exceeding 50°C. Reference should be made to AS/NZ3500
and/or local regulations relating to the need for temperature tempering devices.
▪ The unit must be stored and transported in an upright position. Failure to do so may
render the unit faulty. Such failure is not covered under any warranty agreements.
Failure to comply with the above conditions will void the warranty.
Warning

Sanden Heat Pump - Owner’s Manual
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System contains refrigerant under very high pressure. The system must be serviced by qualified persons only.
requirements and installaon instrucons to determine if addional delivery temperature control is required.
If the hot water system is not used for two weeks or more, a quanty of highly flammable hydrogen gas may
several minutes or unl discharge of gas ceases. Use a sink, basin, or bath outlet, but not a dishwasher, clothes
washer, or other appliance. During this procedure, there must be no smoking, open flame, or any electrical
appliance operang nearby. If hydrogen is discharged through the tap, it will probably make an unusual sound
▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪
Sanden Heat Pump – Owner’s Manual
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Trouble Shooting Guide
If you are faced with a problem in using our Hot Water Heat Pump system, please check
the following items, before seeking professional help.
For those problems not listed in the list above, an inspection provided by a skilled engineer
is required. Please contact your local Dealer.
Caution:
Do not turn off the electricity supplied to the heat pump system even if you go away from
home and do not use hot water for a long while.
If the system is equipped with freeze protect heaters, also do not turn off the power supply
to the heaters.
Failure to do so may cause the pipes to crack, due to freezing.
Status Considerable Causes Action to Take
No hot water
comes out of
water tap
Temperature
of hot water is
too low
Small or no hot water is left in
the storage tank.
- Stop using hot water and wait for about 1
hour
- Consider a change of the electricity
supply off-peak mode (Length of power-
supply hours may be too short for the
water heating cycle to cover the hot water
consumption)
Air removing procedure from the
heat pump system may be
insufficient.
- Open the water drain plugs on the Heat
Pump Unit to remove air from water circuit.
(Be careful for burning)
Filter on cold inlet connector may
be blocked.
- Check the filter and remove if there is any
blockage
Water flow speed may be
dropped due to the heat pump
piping bend, blockage or crush.
- Check for any piping bend or crush and
remove if any
Pipes may be frozen. - If frozen area is found on the piping, melt
the ice on the pipe and provide a heat
insulation
Stop valve is closed. - Open the valve
Air absorption is not sufficient
due to a blockage on the
evaporator.
-Remove the object blocking the air flow
through the evaporator
(e.g. fallen leaves, grass, snow, etc.)
For those problems not listed in the list above, an inspection provided by a licensed plumber
is required. Please contact your local Dealer.
Caution:
Do not turn off the electricity supplied to the heat pump system even if you are away from
home and do not use hot water for a long while.
If the system is equipped with freeze protect heaters, also do not turn off the power supply
to the heaters.
Failure to do so may cause the pipes to crack, due to freezing.
Status Considerable Causes Action to Take
No hot water
comes out of
water tap
Temperature of
hot water is too
low
Little or no hot water is left in the
storage tank.
- Stop using hot water and wait for about 1
hour
- Consider a change of the electricity
supply off-peak mode (Length of power-
supply hours may be too short for the
water heating cycle to cover the hot water
consumption)
Air removing procedure from
the heat pump system may be
insufcient.
- Open the water drain plugs on the Heat
Pump Unit to remove air from water circuit.
(NB: High hot water temperature)
Water pressure may be low due
to the heat pump piping bent,
blocked or crushed.
- Check for any physical damage and make
good.
Pipes may be frozen.
- If frozen area is found on the piping, melt
the ice on the pipe and provide a heat
insulation
Stop valve is closed. - Open the valve
Air absorption is not sufcient due
to a blockage on the evaporator.
- Remove the object blocking the air flow
through the evaporator
(e.g. fallen leaves, grass, snow, etc.)

Sanden Heat Pump - Owner’s Manual
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Sanden Heat Pump – Owner’s Manual
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Error Codes
When an error has occurred, a red LED on the operation panel turns on and an error code
is displayed on the LED display. The panel does not turn to the display sleep mode while
the error code is shown.
Figure 3 Error Code example
Below is the list of the error codes. If the corrective action does not solve the error problem,
a malfunction of the PCB is highly likely.
Error
code
Error contents Error
code
Error contents
H9 HP ambient（outdoor）
temperature thermistor error F5 Communication error between main
PCB to control PCB
HC HP water outlet（outgoing）
temperature thermistor error E8 High inlet current error
J3 HP discharge temperature
thermistor error H8 Current error
J5 HP suction temperature thermistor
error L4 High temperature of module error
J6 HP defrost temperature thermistor
error L5 High outlet current error
J8 HP water inlet（return）
temperature thermistor error P4 Module temperature thermistor
error
H7 Tank temperature thermistor error U2 High voltage error
E6 Compressor booting error HJ Water circuit error
H6 Compressor revolution error EC High water outlet error
U0 Refrigerant leakage error E9 Water circulation pump error
E1 Main PCB error E7 Fan motor locked
E2
L7 Control PCB error F3 Discharged temperature error
malfunction

Sanden Heat Pump - Owner’s Manual
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Plumb pipes to the tank unit and the heat pump unit.
Push up the lever on the PTR valve to open, and ll the tank unit with water.
Conrm that the water comes out of the relief valve and then close the lever.
Open the hot water taps in the home to remove air.
Close the hot water taps in the home once air is purged.
Open the brass drain plug, one turn is sufcient. Do not remove the plug entirely.
Close the drain plug (nger tighten only) once water runs clear.
Connect the power to the heat pump unit.
The Air Purge mode is auto-activated, the rst time that the heat pump is powered up.
Alternatively, follow the steps below.
Air removing process
Open the hot water taps in the home to remove air.
Close the hot water taps in the home after no air is conrmed in the water.
1. Air Purge Mode (Refer to Figure 4).
Access Maintenance Mode by depressing the up and down keys on controller for
approximately 5 seconds until controller displays maintenance mode: “H_SE”.
2. Press the “Up” or “Down” keys until Air Purge mode is reached “APon” displayed on
the controller. Press “Enter” key.
After approximately 5 minutes, Air Purge mode will automatically complete and the heat
pump will start a heating cycle.
Please note:
The following steps must be taken to ensure all air is removed from the
system. Failing to do so could cause water temperature variances and
possible damage to the circulating pump and heat exchanger.
Removing air from the system
*Caution
If air removing mode is not completed, the system will not start the heating cycle.
Figure 4: Air removing process

Sanden Heat Pump - Owner’s Manual
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Sanden Heat Pump – Owner’s Manual
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Electrical connections
• Electrical installation should be done only by a licensed electrician who carries out
the work according to the relevant regulations for electrical safety and wiring.
• Follow the wiring rules for the breaker rating and the thickness of the electrical
wiring.
• Verify that the tank unit is full of water and the water stop cocks are open before
turning on the power.
System operation, if connected to continuous power
 The system runs its water heating cycle once a day to fill up the storage tank unit with
heated water.
 If the block out time function is selected (setting is covered in page 16 of Installation
Manual) the unit will not operate during the block out times – this function is typically
used on installations that have time of use electricity tariffs
 The water heating cycle operation starts automatically when the residual hot water in
the tank unit decreases.
 The system will not run if the electrical power supply is cut off (i.e. if it is connected to
off-peak power). However, the system will automatically start operation, once the
electricity becomes available.
System operation if connected to off-peak electricity
 There are no special settings for the off-peak connection. The system will run once the
power becomes available and the temperature in the tank drops below the set point of
the tank thermistor. If connecting the unit to off peak ensure that the off-peak tariff
provides a minimum of 5 hours continuous power, as it can take at least four hours to
fill the tank unit with hot water at installation. If the ambient temperature is lower than
10oC this can be longer.
 If the unit is connected to off peak power and hot water consumption has been
exceptionally high, then hot water may not be available until the next power supply
cycle.
 Daily frequency and amount of hot water consumption may also affect the duration of
the heating cycle operation.
Select the electrical supply mode that best suits the customer’s hot water
consumption. The type of off-peak connection may need to be changed if hot water
supply is not maintained as required.
Figure 5: Outline of electrical system connections

Sanden Heat Pump - Owner’s Manual
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Sanden Heat Pump – Owner’s Manual
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How to connect power line and thermistor cable
Please note：
Electrical installation should only be done by a licensed electrician
 Remove the piping cover screw clamp fitting.
 Connect the power supply line to the terminal block.
 Hold the power supply line below the terminal block with the screw clamp fitting.
 Connect the thermistor cable line to the terminal block.
 Hold the thermistor cable with the code clip and conduit clip
 Attach the piping cover back on the heat pump unit.
Figure 6: Connect power cables
25mm or less
Sanden Heat Pump – Owner’s Manual
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：





Hold the thermistor cable with the code clip and conduit clip
 Attach the piping cover back on the heat pump unit.
Figure 6: Connect power cables
Connect the Modbus controller cable to terminal block when using Modbus controller.
Fix the Modbus controller cable with a code clip.
0.5mm~1mm
Power wire
Core
·Standard tightening torque for the terminal is 1.4
2.0 N..m.·Ensure to use a solid wire for the heat pump power communication
line and to install the power communication terminal.
Thermistor cable
Green
Green
Blue
Black
White
Modbus
controller
cable
GND
Black
White
Code clip
Conduit clip
RedPower supply
Black
White
Green/Yellow
Ground
Wire holder band
Power line
NLPOWER25mm
or
less

Sanden Heat Pump - Owner’s Manual
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Sanden Heat Pump – Owner’s Manual
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Water Supply Quality
Chloride, Water Hardness and pH
In high chloride water supply areas, the water can corrode some parts and cause them
to fail. Where the chloride level exceeds 200 mg/litre or Water Hardness level exceeds
200 mg/litre warranty does not apply to the heat pump unit and tank unit. pH is a
measure of whether the water is alkaline or acid. In an acidic water supply, the water
can attack the parts and cause them to fail.
No warranty applies to the heat pump unit and tank unit where the pH is less than 6.5
or more than 8.5. The water supply from a rainwater tank unit in a metropolitan area is
likely to be corrosive due to the dissolution of atmospheric contaminants.
Water with a pH less than 6.5 may be treated to raise the pH. It is recommended that
an analysis of the water from a rainwater tank be conducted before connecting this
type of water supply to the system.
Figure 7
Change of water supply
Changing, or alternating, from one water supply to another can have a detrimental
effect on the operation and/or life expectancy of the water tank unit cylinder, PTR valve,
water heating circulation and the water heat exchanger in the system. Where there is a
changeover from one water supply to another, for example, a rainwater tank supply,
desalinated water supply, public reticulated water supply or water brought in from
another supply, then water chemistry information should be sought from the supplier or
the water should be tested to ensure it meets the warranty requirements in this manual.

Sanden Heat Pump - Owner’s Manual
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850
690
48
15
2.5
27.5150
150 70
75
36
412.5
3026
356
327.3
122.5
122.5
580
2370
659
23
675
825 300
16
Water Resistance Rating

Sanden Heat Pump - Owner’s Manual
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GAUS-160FQTS GAUS-250FQTS GAUS-300FQTS GAUS-315FQTS GAUS-315FQTV

Sanden Heat Pump - Owner’s Manual
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Sanden Heat Pump – Owner’s Manual
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3
15L
300L
250L
160L

Sanden Heat Pump - Owner’s Manual
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1. The Sanden “Eco”® Hot Water Heat Pump System must be installed in accordance
with the installation instructions supplied with the Sanden “Eco”®Hot Water Heat
Pump System and in accordance with all relevant statutory and local requirements of
the state in which the water heater is installed.
2. Where a failed component or Sanden “Eco”®Hot Water Heat Pump System is
replaced under warranty, the balance of the original warranty period will remain
effective. The replaced part or Sanden “Eco”®Hot Water Heat Pump System does
not carry a new warranty.
3. Where the Sanden “Eco”®Hot Water Heat Pump System is installed outside the
boundaries of a metropolitan area as dened by Sanden or further than 25 kilometers
from an accredited service agent, the cost of transport, insurance and travelling costs
between the nearest accredited service agent’s premises and the installed site shall
be the owner’s responsibility.
4. Where the Sanden “Eco”®Hot Water Heat Pump System is installed in a position that
does not allow safe, ready access, the cost of accessing the site safely, including the
cost of additional materials handling and/or safety equipment, shall be the owner’s
responsibility.
5. The warranty only applies to the Sanden “Eco”®Hot Water Heat Pump System and
original or genuine (company) component replacement parts and therefore does not
cover any plumbing or electrical parts supplied by the installer and not an integral
part of the Sanden “Eco”®Hot Water Heat Pump System. Such parts would include
pressure limiting valve, isolation valves, non-return valves, electrical switches, pumps
or fuses.
6. The Sanden “Eco”® Hot Water Heat Pump System must be sized to supply the hot
water demand in accordance with the guidelines in the Sanden “Eco”®Hot Water
Heat Pump System literature.
1.Repair and replacement work will be carried out as set out in the Sanden “Eco”®Hot
Water Heat Pump System warranty. However the following exclusions may void the
warranty and may incur a service charge and/or cost of parts:
2. Accidental damage to the Sanden “Eco”®Hot Water Heat Pump System or any com-
ponent, including: Acts of God, failure due to misuse, incorrect installation, attempts
to repair the water heater other than by a Sanden accredited service agent or the
Sanden service department.
3. Where it is found there is nothing wrong with the Sanden “Eco”®Hot Water Heat
Pump System; where the complaint is related to excessive discharge from the
temperature and/or the pressure relief valve due to high water pressure; where
there is no ow of hot water due to faulty plumbing; where water leaks are related to
plumbing and not the Sanden “Eco”®Hot Water Heat Pump System or its compo-
nents; where there is a failure of electricity or water supplies; where the supply of
electricity or water does not comply with relevant codes or acts.
4. Where the Sanden “Eco”®Hot Water Heat Pump System or its component has failed
directly or indirectly as a result of excessive water pressure, or power surges beyond
the specied electrical supply.
5. Overow vent drain has not been installed or blocked or corroded.
6. Where the Sanden “Eco”®Hot Water Heat Pump System has rusted as a result of a
corrosive atmosphere.
7. Where the unit fails to operate as a result of ice formation in the pipe work to or from
the Sanden “Eco”®Hot Water Heat Pump System.
8. Where the Sanden “Eco”®Hot Water Heat Pump System is located in a position that
does not comply with the Sanden “Eco”®Hot Water Heat Pump System installation
instructions or relevant statutory requirements, causing the need for major disman-
tling or removal of cupboards, doors or walls, or use of special equipment to bring the
Heat Pump Water Heater System to oor or ground level or to a serviceable position.
Warranty Conditions
Warranty Policy:
Warranty Exclusions

Sanden Heat Pump - Owner’s Manual
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9. Repair and/or replacement of the Sanden “Eco”®Hot Water Heat Pump System due
to scale formation in the waterways or the effects of either corrosive water or water
with a high chloride or low pH level when the water heater has been connected to
a scaling or corrosive water supply or a water supply with a high chloride or low pH
level as outlined in the Owner’s Guide and Installation Manual.
10. Where the Sanden “Eco”®Hot Water Heat Pump System or its components have
failed directly or indirectly, as a result of inclusion as an integral part of a Ring Main
system or in an Off Grid application.
11. Where the Sanden “Eco”®Hot Water Heat Pump System or any of its components,
has failed, directly or indirectly, as a result of excessive power surges, lightning
strikes or high voltage fusion of components on the Power Control Boards (PCBs).
12. Warranty service is provided to the original owner of the equipment only.
Registration for warranty
Warranty Period:
Subject to the Warranty Conditions and Exclusions stated above, your Sanden “Eco”®Hot
Water Heat Pump System is warranted, in a Residential application, as follows:
Heat pump unit:
Sanden warrants all parts and labour on the Sanden “Eco”®Hot Water Heat Pump System
for a period of 6 years from date of installation.
Labour costs are paid directly to the servicing contractor per the payment cost schedule
published by Sanden and revised from time to time at Sanden’s requirement.
Stainless Steel Tank Unit:
Sanden warrants all parts and labour on the stainless steel tank for 10 years at 100%
replacement and for a further 5 years under a pro-rata scale, culminating in warranty end
after 15 years from date of installation.
Vitreous Enamel Tank Unit:
Sanden warrants all parts and labour on the vitreous enamel tank for 7 years at 100%
replacement and for a further 3 years under a pro-rata scale, culminating in warranty
end after 10 years from date of installation. The sacrificial anode must be checked and if
necessary, replaced by an authorised Sanden Dealer after 5 years, at the owner’s cost. Proof
of which must be provided for any warranty claims.
All valves and connectors supplied by Sanden carry a 2 year parts warranty from date of
installation. The Pressure Temperature Relief valve supplied with the Sanden tank carries a 1
year parts warranty from date of installation.
In a commercial or industrial application, the warranty period on both the Heat Pump unit and
Tank will be based on detail provided and determined upon application.
Warranty terms and conditions are subject to change without notice.
In order to register your system for warranty purposes, please visit our website www.sanden-hot-
water.com.au, locate the Warranty Registration page and complete the details of your purchase.
Subject to any statutory provisions to the contrary, this warranty excludes any and all
claims for damage to furniture, carpets, walls, foundations or any other consequential
loss either directly or indirectly due to leakage from the Sanden “Eco”
®
Hot Water Heat
Pump System, or due to leakage from ttings and/or pipe work of metal, plastic or other
materials caused by water temperature, workmanship or other modes of failure.

SANDEN Heat Pump
40950-44733 Owners’ Manual AU