Sanden Heat Pump G2 GAU-A45HPA
QUICK REVIEW
Sanden Heat Pump Unit
Known also as the Sanden "G2" Heat Pump
Model Number: GAU-A45HPA
Covered under the Sanden Eco systems (tank and heat pump):
GAUS-315EQTA, GAUS-315EQTD, GAUS-315EQTE
Superceded by the Sanden Heat Pump "G3" Unit in 2017
- High efficiency CO2 refrigerant heat pump
- Whisper quiet operation
- High quality, Japanese made
- Unique design operates in all climates
- No backup element required
Sanden Heat Pump G2
• A high Coefficient of Performance (COP=4.5^) results in significantly reduced energy use and CO2 emissions.
• Up to 50% faster heat recovery than typical heat pumps. In ambient air of 20 ºC it takes approx 4 hours to heat 315 L of water from 17 ºC to 65 ºC.
• Uses unique Ozone friendly R744 (CO2) refrigerant.
• Simple installation by Plumber & Electrician, with no Refrigeration Mechanic required.
• An automatic heating cycle, which makes it perfect for use with Off-Peak tariff.
• Fitted with in-built freeze protection, making it suitable for all climates (ie. -10 ºC to +43 ºC operating range).
• No backup element required.
• Whisper quiet operation, with industry leading noise level of 38 dB - very neighbour friendly!
• High quality, weather resistant construction for outdoor location.
• 3 year Warranty.
Testimonials
What they are saying about us
F.A.Q
Frequently Asked Questions
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What is the life expectancy of the Sanden Eco® Plus heat pump hot water system?
The Sanden Eco Plus heat pump hot water (HPHW) system is designed to last for 15 years. The high quality, weather resistant Eco® Plus HWHP outdoor module carries a 6 year warranty and the extra-long life stainless steel storage tank carries a class leading, 15 year warranty.
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What are the benefits of the Sanden Eco® Plus heat pump hot water system?
Benefits include:
You can save up to 80% of your hot water energy costs when compared with a traditional electric hot water system! The Sanden Eco® Plus Hot Water Heat Pump uses only 20% of the energy required by older-style, electric element hot water storage systems.
Not only does a Sanden Eco® Plus heat pump hot water system help save on energy costs, it also delivers:
(a) Heat Pump Unit Benefits:
- Innovative technology; up to 50% faster heat recovery than currently available Hot Water Heat Pumps.
- Industry leading quality & performance; the Sanden Eco Plus gives you the highest level of STC credits of any currently available heat pump hot water system.
- Class leading warranties; backed by Sanden’s 35 years of operation in Australia.
(b) Stainless Steel Storage Tank Benefits:
- High quality; extra long life duplex stainless steel cylinder.
- Fully insulated; for extremely low heat loss.
- Safety, pressure and temperature relief valves.
- Mains pressure rated.
- Innovative technology; up to 50% faster heat recovery than currently available Hot Water Heat Pumps.
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Does the Sanden Eco® heat pump hot water system require the assistance of an electric booster element to heat water, when outside ambient temperatures are very low?
No, unlike other competitor heat pump hot water (HPHW) systems, the Sanden Eco® HPHW system does not require an electric booster element
• A high Coefficient of Performance (COP=4.5^) results in significantly reduced energy use and CO2 emissions.
• Up to 50% faster heat recovery than typical heat pumps. In ambient air of 20 ºC it takes approx 4 hours to heat 315 L of water from 17 ºC to 65 ºC.
• Uses unique Ozone friendly R744 (CO2) refrigerant.
• Simple installation by Plumber & Electrician, with no Refrigeration Mechanic required.
• An automatic heating cycle, which makes it perfect for use with Off-Peak tariff.
• Fitted with in-built freeze protection, making it suitable for all climates (ie. -10 ºC to +43 ºC operating range).
• No backup element required.
• Whisper quiet operation, with industry leading noise level of 38 dB - very neighbour friendly!
• High quality, weather resistant construction for outdoor location.
• 3 year Warranty.
Sanden Heat Pump Unit also known colloquially as the "G2".
Table of Specifications
| Model: | GAU-A45HPA |
| Dimensions | |
| Weight: | 65kg |
| Width: | 898mm |
| Height: | 754mm |
| Depth: | 283mm |
| Technical | |
| Power Input: | 1.0kW |
| COP (Heating Efficiency) | 4.5 |
| Refrigerant | CO2 (R744) |
| Water Temperature Setting | 65 ºC |
| Compressor | Variable |
| Electrical Supply | 220-240V/50Hz/1Ph |
| Circuit | 15 Amps |
| Operating Noise Level | 38 dB |
| Ambient Air Operating Temperature | -10 ºC to +43 ºC |
| Water Connections and Settings | |
| Inlet | ½ ” BSP, 12.7 mm |
| Outlet | ½ ” BSP, 12.7 mm |
Specifications from the Sanden Owners Manual document
Extracted from the Sanden Brochure for the Sanden Heat Pump G2 Model GAU-A45HPA
Trouble shooting guide
If you faced to a problem in a use of our heat pump water heater system, please check the following things prior to calling for a support.
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. |
|
Air removing procedure from the heat pump system may be insufficient. |
| |
Filter on cold inlet connector may be blocked. |
| |
Water flow speed may be dropped due to the heat pump piping bend, blockage or crush. |
| |
Pipes may be frozen. |
| |
Stop valve is closed. |
| |
Air absorption is not sufficient due to a blockage on the evaporator. |
|
For those problems not listed in the list above, an inspection provided by a skilled engineer is required. Please contact the distributor.
Caution:
Do not shut 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 shut the power supply to the heaters.
Failure to do so may cause a crack on the pipes due to the pipes getting frozen.
Cleaning the inlet filter
- Remove end cover from the Heating Unit to expose inlet/outlet connections
- Turn off inlet water (tap to inlet or at main supply)
- Remove filter plug by unscrewing knurled knob anti-clockwise
- Clean filter by washing (do not pry anything loose)
- Replace filter plug (insert & screw clockwise)
- Turn inlet water on & check to ensure no leak around filter
- Replace the inside cover and the end cover
Do NOT attempt to open the system for any reason; such action will nullify the warranty.
If any other fault occurs or is recognised, you must contact your supplier for a service call and repair.
Removing air from the system
Air Removing Process
- Open the water drain plugs (2 places) on the Heat Pump Unit
- Close the plugs after no air is confirmed in the water
- Supply the power to the Heat Pump Unit and leave the water open for 3 minutes.
- Close the tap after no air is confirmed in the water
Caution Hot water may come out. Be careful not to get the hands burnt.
