Sanden GAUS-160FQS User manual

Sanden Heat Pump – Owner’s Manual
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Covering model numbers for residence
GAUS-160FQS
GAUS-250FQS
GAUS-300FQS
GAUS-315FQS
GAUS-315FQV
Heat Pump Unit GAU-A45HPC
This appliance is not to be used 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.
Children being supervised not to play with the appliance.
Owner’s
m
anual
20892940(K

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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.

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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 CO
2
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 CO
2
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

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Do not touch the tap while hot water is being
supplied

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LPG
・Please contact the Dealer about insulating the pipes.
・Contact the Dealer for repair.

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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 a
n
d vibration while operating will
not bother your neighbours.

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Installation details
This Sanden Eco Hot water Heat Pump System must be installed by a licensed person in
consideration of the following standards and regulations:
AS/NZS3500 National plumbing and drainage code hot water supply systems –
acceptable solutions
HB 263-2004 Heated water systems plumbing industry commission
AS/NZS 3000 Electrical installations (known as the Australian/New Zealand 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
o
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.
Figure 2: Typical installation layout

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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.)

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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 temperature thermistor
error F5 Communication error between main PCB to control PCB
HC HP water outlet 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 Heat exchanger temperature
thermistor error L5 High outlet current error
J8 HP water inlet 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 pump error
E1 Main PCB error E7 Fan motor locked
E2
L7 Control PCB error F3 Discharged temperature error

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Removing air from the system
Please note:
Plumbing work should only be completed by a licensed plumber
•The following steps must be taken to ensure all air is removed from the system.
Incorrect removal of air may cause the water temperature to vary.
•Plumb pipes to the tank unit and the heat pump unit.
•Push up the lever on the PTR valve to open, and fill the tank unit with water.
•Confirm 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 after no air is confirmed in the water.
•Open the water drain plug on the heat pump unit.
•Close the plug after no air is confirmed in the water.
•Connect the power to the heat pump unit.
•Air removing process (Refer to figure 4)
1. Switching to Air Removing Mode
Long press the “Up” and “Down” keys to switch to the “Heat Setting Mode”.
2. Press the “Up” or “Down” keys to switch to the “Air Removing Mode” and press
the “Enter” key. Press the “Up” keys again to display “APon”,then press the
“Enter” key.
It will automatically go back to the clock display mode than 5 minutes.
•Open the hot water taps in the home to remove air.
•Close the hot water taps in the home after no air is confirmed in the water.
Figure 4: Air removing process
Plumb pipes to Storage Tank Unit and Heat Pump Unit.
Push up the lever on the PTR valve to open,
and fill in the tank with water.
Confirm the water come out of the relief valve,
and then close the lever.
Water drain plugs
Open the faucet to remove air. Close the faucet
after no air bubbles can be seen in the water.
Open the water drain plugs (2 places) on the Heat Pump
Unit. Close the plugs after no air is confirmed in the water
supply.
Then connect power to the Heat Pump Unit. Open
Faucets.
PTR valve lever
Open
The drain
plug

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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
10
o
C 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

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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

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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 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.

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Technical data
Heat pump Unit Dimension
Unit: mm
Specification
Refrigerant type R744（CO2）
Mass volume 740 g
Setting Outlet water temp 63 ℃
Product weight 49 kg
MAX HEAT OUTPUT 6.0 kW
MAX RATED POWER INPUT 2.3 kW
Circuit Breaker Size 20A
Design Pressure（High/Low）14/9 MPa
Protection Raining Class IPX4
MAX Operating water Pressure 700 kPa

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Hot water storage tank unit
REFER Drawing provided with tank

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3
15L
300L
250L
160L

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Warranty Policy
Warranty Conditions
1. The Sanden Heat Pump Water Heater System must be installed in accordance with the
installation instructions supplied with the Heat Pump Water Heater System, and in
accordance with all relevant statutory/local requirements of the
state/province/municipality in which the water heater is installed.
2. Where a failed component or Heat Pump Water Heater System is replaced under warranty,
the balance of the original warranty period will remain effective. The replaced part or Heat
Pump Water Heater System does not carry a new warranty.
3. Where the Heat Pump Water Heater System is installed outside the boundaries of a
metropolitan area as defined 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 Heat Pump Water Heater 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 Heat Pump Water Heater 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 Heat Pump Water
Heater System. Such parts would include pressure regulating valve, isolation valves, check
valves, electrical switches, pumps or fuses.
6. The Heat Pump Water Heater System must be sized to supply the hot water demand in
accordance with the guidelines in the Sanden Heat Pump Water Heater System literature.
Warranty Exclusions
1. Repair and replacement work will be carried out as set out in the Sanden Heat Pump Water
Heater System warranty. However the following exclusions may void the warranty and may
incur additional service charges and/or cost of parts:
2. Accidental damage to the Heat Pump Water Heater System or any component, 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 Heat Pump Water Heater 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 flow of hot water due
to faulty plumbing; where water leaks are related to plumbing and not the Heat Pump
Water Heater System or its components; 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 Heat Pump Water Heater System or its component has failed directly or
indirectly as a result of excessive water pressure.
5. Overflow vent drain has not been installed or is blocked or corroded
6. Where the Heat Pump has rusted as a result of a corrosive atmosphere;

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cont.
7. Where the unit fails to operate or fails as a result of ice formation in the piping to or
from the Heat Pump Water Heater System.
8. Where the Heat Pump Water Heater System is located in a position that does not comply
with the Heat Pump Water Heater System installation instructions or relevant statutory
requirements, causing the need for major dismantling or removal of cupboards,
doors or walls, or use of special equipment to bring the Heat Pump Water Heater
System to floor or ground level or to a serviceable position.
9. Repair and/or replacement of the Heat Pump Water Heater 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
Manual and Installation Manual.
10．Warranty service is provided to the original owner of the equipment only.
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 Heat Pump Water Heater System, or due to
leakage from fittings and/or pipe work of metal, plastic or other materials caused by water
temperature, poor workmanship or other modes of failure.
Warranty Period
Subject to the Warranty Conditions and Exclusions stated above, your Sanden Heat
Pump Water Heater System is warranted in a Residential application as follows:
Heat pump unit – Sanden warrants all parts labour on the SANDEN water heater system
for a period of 6 (Six) 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.
Tank unit – Sanden warrants that the tank will be free from defects for 10
years at 100% replacement, and for a further 5 years under a
pro-rated scale, culminating in warranty end after Fifteen years
from date of installation
In a Commercial or Industrial application the warranty period on both Heat
Pump unit and Tank is reduced to 1 (One) year only with no Labour warranty.
Warranty terms and conditions are subject to change without notice. Please refer to our
website www.sanden-hot-water.com.au for the latest updated Warranty information.
Registration for warranty
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

SANDEN Heat Pump
40950-44733 Owners’ Manual AU