Covering model numbers GAUS-315EQTD GAUS-315EQTE Heat Pump Unit GAU-A45HPA Tank Unit GAU-315EQTE Sanden Heat Pump – Installation Manual Page 1 of 32
Contents Cover page ......................................................................................................................... 1 Contents ............................................................................................................................. 2 Introduction ........................................................................................................................ 3 How it works ..................................................................................
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 energy efficiency. By using CO2 as the refrigerant we have produced one of the most energy efficient units currently available.
Installation details This Heat Pump Water Heater System must be installed by licensed personnel in accordance with local building codes: Installing contractor should be licensed by applicable state/province and municipal authorities to install an Electrical & Plumbing product.
Installation location For the most efficient operation of the heat pump unit the optimum location is the warmest side of the property and there should be sufficient space for the air to circulate through the unit. The tank unit should be located as close as possible to the most frequently used hot water outlet such as a bathroom. It may be located either outside or inside.
Figure 4: Restrictions on installation between the tank unit and the heat pump unit >24” or 600mm (Maintenance Space) Maximum pipe length 50ft per line between Tank & Heat Pump Unit Maximum number of bends – 6, use long radius bends not street “L’s” Heat Pump Unit Installation The surface to which the heat pump unit is installed must be firm, preferably a concrete pad or block.
Cont The only adjustment required is to the current time setting on the timer setting panel under the top housing cover, especially if the blackout time setting is desired. See current time setting, and blackout time section on page 19. Figure 5: Heat pump installation example and dimensions Unit Weight 123lbs Attach the drain elbow to the drain opening located on the bottom of the heat pump unit. The drain elbow is included in the installation kit for the heat pump unit.
Cont This product cannot be connected to a solar water heater. The piping must be appropriately insulated, consider Heat tape to protect the water piping in areas with freezing temperatures. If the piping needs brazing make sure that all flux and flux splatter is wiped away with a wet cloth. When brazing ensure connections are protected using a wet cloth As the hot-water supply pipe will expand and contract, use sleeves when penetrating through concrete walls or slabs.
Heat Pump Unit Water piping Connect the heat pump unit COLD supply to the tank unit fitting marked Cold Supply. – ½” NPT Connection (Certain early units may use ½” BSP connections). Connect the heat pump unit HOT return to the tank unit fitting marked Hot Return – ½” NPT Connection (Certain early units may use ½” BSP connections). Connect the mains water supply to the lower fitting on the tank unit marked Cold Water Inlet.
Figure 6: Typical System piping 100 Psi Water Faucet Shut off valves Check valves Pressure Reducer 95 Psi MAX Sanden Heat Pump – Installation Manual Page 10 of 32
Mains Power/Electrical Installation All Electrical Wiring should be done in accordance with the latest edition of the National Electrical Code (NEC) and all local State/Province and Municipality codes. The power requirement for the system is a dedicated 15 amp circuit fitted with a circuit breaker. This circuit may be connected to constant power or off-peak power. A local disconnect should be installed adjacent to the Heat Pump unit in accordance to NEC and local codes.
Figure 10: Power Wiring Connections Ground 208/230V Power Sanden Heat Pump – Installation Manual Page 12 of 32
How to connect Tank thermistor cable to Heat Pump unit The thermistor cable and conduit length are designed to cover the maximum allowable distance between the tank unit and heat pump unit (50 feet). If the units are located closer, the thermistor cable and conduit may be cut to the desired length (Figure 11). Attach the conduit connector to the conduit end. Push the conduit into the opening on the connector until the conduit does not go any further.
System operation using continuous power The system runs its water heating cycle once a day to fill up the storage tank unit with heated water. If the blackout time function is selected (setting is covered on Page 19) the unit will not operate during the blackout times – this function is typically used on installations that have time of use electricity tariffs.
Figure 9: Outline of electrical system connections 208/230V Power Ground Wire The basic system installation is now complete, the unit is now ready for initial filling, air purge and then start up Check the Installation against the Installation Check list provided at the end of this manual Ensure that the work site is tidy; Sanden International recommends the use of Slim Duct or Fortress product to cover water piping on the outside of the house Sanden Heat Pump – Installation Manual Page 15 of 32
Filling the System & Purging Air The following steps must be taken to ensure all air is removed from the system. Incorrect purging of air may cause the water temperature to vary during operation. Ensure that all piping to tank unit and heat pump unit are installed and connections are tight, then open the Cold Water Supply Valve to the system Push up the lever on the PR valve to open, and fill the tank unit with water. Confirm that water comes out of the relief valve, and then close the lever.
Freeze protection Even if the water pipes have been insulated, the piping can freeze if the surrounding temperature falls below freezing (32oF). This could cause damage to the equipment and piping so make sure the appropriate freeze protection measures are taken. Follow the instructions in the installation manual provided with the freeze protection heat tape. After completion of the piping, inspect the plumbing for any water leaks from the joints before installing freeze protection.
Unit Operation Time setting and Blackout time setting Current time setting This product contains a built-in clock. As a part of the water heating cycle logic refers to the current time, it is necessary to set the clock before starting to use the product. The current time can be set in the Clock Setting Mode as described below. *Note There is no need to adjust the time setting for the daylight saving period.
Blackout time setting mode This mode is used to set the blackout time that stops the heat pump unit operation within the selected time. Blackout times can be used if the customer has a time of use tariff. Change the mode Press and hold down Up and Down keys together in the clock display mode to go to the blackout time setting mode. Once the mode is changed, ‘bo’ and ‘00XX’ (00 = start time, XX = end time) are displayed.
Maintenance Mode Figure 12 Maintenance mode Maintenance mode is a function to check the heat pump unit status and to check and perform other settings. It should generally be assumed that the owner does not operate this function. The following modes can be found in the maintenance mode. Blackout time setting mode Set the blackout time. Error history display mode Check the history of any errors that may have occurred. Parameter display mode Check the values measured by the thermistor.
How to switch to Maintenance Mode Press and hold down Up and Down keys together in the clock display mode to go to the maintenance mode. After the mode is switched, press the Enter key to select a mode from the six modes described above. To exit maintenance mode, press and hold down the Enter key, or leave for more than 60 seconds with no panel operation.
Error Codes When an error occurs, a red LED on the timer setting panel turns on and an error code is displayed on the LED display. The panel does not return to the display sleep mode while the error code is shown. After a component is replaced or the inspection is completed, turn the breaker on/off several times for at least 60-120 seconds each time, to confirm the error does not re-occur. Below is the list of the error codes.
E042 E043 HP outlet temperature thermistor detection error HP discharge over temperature 1 HP discharge temperature E044 Thermistor detection error E045 HP defrost thermistor detection error E047 High pressure side error E048 High ambient temperature defrost drive error E070 Fan motor locked E071 Fan motor revolution error E073 Water circulation pump locked - Check if the thermistor is out of the mounting pocket on the water outlet pipe - Replace the discharge temp thermistor - Reconnect the e
Water Supply Quality (Supplemental) Chloride and PH In areas with a high concentration of chloride in the water, that water can cause corrosion and subsequent failures. Where the chloride level exceeds 9 ounces per 66 gallons (250 mg/litre), the warranty is no longer valid on 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.
Dimensions and Technical Data Hot water storage tank unit GAU-315EQTE Storage capacity Product weight Design pressure Storage tank material Outside casing 83 gallons (315 litres) 180 lbs (82 kg) 101 PSI (700 kPa) Stainless steel Colour coated zinc steel Sanden Heat Pump – Installation Manual Page 25 of 32
Heat pump unit GAU-A45HPA Refrigerant type Product weight Thermal capacity Power consumption COP Heated water temp. R744(CO2) 123lbs/56 kg 15,350 Btu/h 4.5 kw *1 1.0 kw *1 4.5 *1 o 149 F (65 oC) *1 Ambient temp. (Dry / Wet) 61 oF (16oC) / 63 oF (17oC), Inlet water temps. 63oF (17oC), Outlet water temp.
Wiring Diagram Sanden Heat Pump – Installation Manual Page 27 of 32
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.
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.
Post installation inspection checklist On completion of the installation, inspect and check off each item in the charts on the following page. Once the inspection has been completed remove the inspection table and hand to the customer.
Check sheet Safety items Action Completed Fix the tank unit in place with anchor bolts if necessary. The floor below the tank has been properly water proofed and is capable of supporting the tank. The mains breaker is of the correct size and voltage Breaker can be turned off, local disconnect in place. Ground wiring is installed and tight. The Heat Pump unit is installed on a level sturdy surface. There are no gas containers or flammable materials anywhere near the unit.
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