Sanden Heat Pump G5 GAU-A45HPD
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Sanden Heat Pump G5
Model Name: GAU-A45HPD
Inclusive with the following Sanden systems:
GAUS-160FQTS, GAUS-250FQTS, GAUS-300FQTS, GAUS-315FQTS, GAUS-315FQTV
Available since 2022, supercedes the Sanden "G4" model.
- 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 G5 Unit model:
- A high Coefficient of Performance (COP=5.96^) 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 63 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.
- Uniquely designed to operate in all climates (ie. -10 ºC to +42 ºC operating range).
- Includes Blockout Timer, for use with on-roof photo voltaic (PV) solar electricity systems.
- No backup element required.
- Whisper quiet operation, with industry leading noise level of 37 dB - very neighbour friendly!
- High quality, Japanese made weather resistant construction for outdoor location.
- 6 year Warranty
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F.A.Q
Frequently Asked Questions
-
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.
-
What is the noise level of the Sanden Eco® Plus heat pump hot water system?
The unit is rated at 37dB (measured at one metre from the unit), which is almost silent. By comparison, a whisper is around 30dB and the sound of the inside of a Library is approximately 40dB.
- A high Coefficient of Performance (COP=5.96^) 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 63 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.
- Uniquely designed to operate in all climates (ie. -10 ºC to +42 ºC operating range).
- Includes Blockout Timer, for use with on-roof photo voltaic (PV) solar electricity systems.
- No backup element required.
- Whisper quiet operation, with industry leading noise level of 37 dB - very neighbour friendly!
- High quality, Japanese made weather resistant construction for outdoor location.
- 6 year Warranty
Why use the Eco-friendly R744 (CO2) refrigerant?
- It offers no ozone layer depletion and minimal global warming (ie. as per table below) versus other commonly used refrigerants, should the system leak.
- It performs higher compression efficiency, with lower energy consumption, thereby allowing more heat to be transferred to the water, for less energy used (i.e. excellent thermodynamic ability).
- The refrigerant temperature gets very hot, very quickly, so water temperature of 63ºC, is achieved almost instantly from the Heat Pump unit.
Sanden Heat Pump Unit GAU-A45HPD also known colloquially as the "G5".
Table of Specifications
| Model: | GAU-A45HPD |
| Dimensions | |
| Weight: | 48kg |
| Width: | 895mm |
| Height: | 675mm |
| Depth: | 300mm |
| Technical | |
| Heat Output (at 32.45 ºC ambient / 18.74 ºC cold water inlet) | 4.99kW |
| Power Input (at 32.45 ºC ambient / 18.74 ºC cold water inlet) | 0.9kW |
| COP (at 32.45 ºC ambient / 18.74 ºC cold water inlet) | 5.96^ |
| Refrigerant | CO2 (R744) |
| Water Temperature Setting (Nominal) - from Heat Pump unit | 63ºC |
| Compressor | Scroll, with Inverter Control Technology |
| Electrical Supply | 220-240V/50Hz/1Ph |
| Circuit | 20 Amps |
| Operating Noise Level | 37 dB |
| Ambient Air Operating Temperature | -10 ºC to +42 ºC |
| Maximum Operating Water Pressure | 850kPa |
| Maximum Heat Output | 6.0kW |
| Maximum Rated Power Input | 2.3kW |
| Country of Manufacture | Japan |
| Warranty | 6 Years*** |
| Water Connections and Settings | |
| Inlet | ½ ” BSP, 12.7 mm |
| Outlet | ½ ” BSP, 12.7 mm |
Specifications for Sanden Heat Pump Unit G5 Model
Sanden Heat Pump G5 service tips
Removing air from the system
- 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 13)
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 “On”, 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.
- Caution: If air removing mode is not completed, the system will not start the heating cycle.
