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INSTALLATION AND USER MANUAL
Air to Water Heat Pump Water Heater
SLA-R20-190D/N4A4
SLA-R25-250D/N4D4
SLA-R25-300D/N4D4
SMART LIFESTYLE AUSTRALIA PTY LTD
Email: service@smartlifestyleaustralia.com.au
Thank you very much for purchasing our product.
Please read this manual carefully before operating the unit.
All-in-one type
Version 1.1 | August 2024
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Summary of Contents for Smart Lifestyle SLA-R20-190D/N4A4
- Page 1 Air to Water Heat Pump Water Heater All-in-one type SLA-R20-190D/N4A4 SLA-R25-250D/N4D4 SLA-R25-300D/N4D4 SMART LIFESTYLE AUSTRALIA PTY LTD Email: service@smartlifestyleaustralia.com.au Thank you very much for purchasing our product. Please read this manual carefully before operating the unit. Version 1.1 | August 2024...
- Page 2 IMPORTANT: RISK OF FIRE OR EXPLOSION! FLAMMABLE REFRIGERANT USED. Place in well ventilated area to prevent accumulation of refrigerant. Repair and disposal must be carried out by trained service personnel. Propane No naked flame during servicing or repair. (R290) WARNING Installation to conform with AS/NZS 3500.4 WARNING The heat pump unit requires a reliable earthing connection before usage;...
- Page 3 WARNING Hose-set is not to be used. DANGER: The operation of the thermal cut-out indicates a possibly dangerous situation. Do not reset the thermal cut-out until the water heater has been serviced by a qualified person. DANGER: Failure to operate the relief valve easing gear at least once every six months may result in the water heater exploding.
- Page 4 • No ignition sources No person carrying out work in relation to a refrigeration system which involves exposing any pipe work that contains or has contained flammable refrigerant shall use any sources of ignition in such a manner that it may lead to the risk of fire or explosion.
- Page 5 • Repair to intrinsically safe components Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed the permissible voltage and current permitted for the equipment in use. intrinsically safe components are the only types that can be worked on while live in the presence of a flammable atmosphere.
- Page 6 • Charging procedures In addition to conventional charging procedures, the following requirements shall be followed: Ensure that contamination of different refrigerants does not occur when using charging equipment. Hoses or lines shall be as short as possible to minimize the amount of refrigerant contained in them. Cylinders shall be kept upright.
- Page 7 Hoses shall be complete with leak-free disconnect couplings and in good condition. Before using the recovery machine, check that it is in satisfactory working order, has been properly maintained and that any associated electrical components are sealed to prevent ignition in the event of a refrigerant release. Consult manufacturer if in doubt. The recovered refrigerant shall be returned to the refrigerant supplier in the correct recovery cylinder, and the relevant Waste Transfer Note arranged.
- Page 8 Part names: SLA-R18-190D*** Top cover Rear Panel E-box Fan motor Compressor Controller Evaporator Water tank Anode rod PTR valve Front panel Water outlet Cover, E-heater E-heater Condensate drainage Water inlet Overflow SLA-R25-250***, SLA-R25-300*** Top cover E-box Compressor Evaporator Fan motor PTR valve Anode rod Controller...
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Page 9: Table Of Contents
Pages Contents 1. Safety information 2. Preparation of installation 3. Installations 4. Trial-running 5. Operation 6. Troubleshooting 7. Maintenance 8. Specifications viii Version 1.1 | August 2024... -
Page 10: Safety Information
1. Safety information Please carefully read thoroughly all of the instructions before installing or operating the unit. Following safety symbols are very important, please carefully read and always obey all safety symbols. If the precaution is not taken, it may cause minor or moderate injury CAUTION WARNING If the warning is not heeded, it can cause death or serious injury. - Page 11 CAUTION The ground wire’s pole of socket must be grounded well, make sure that power supply socket and plug are dry and connected well. To check the power supply socket and plug are qualified - Step 1: Turn on the power supply. Step 2: Keep the unit running for a half hour.
- Page 12 Before install the appliance, The refrigerant Appliance read the installation manual filled with flammable gas first. R290. Before repair the appliance, Before use the appliance, read the service manual first. read the owner’s manual first. To realize the function of the air conditioner unit, a special refrigerant circulates in the system. The used refrigerant is the fluoride R290, which is specially cleaned.
- Page 13 - The naked flame is prohibied in the maintenance areal; and the “no smoking” warning board should be hanged. Check whether the appliance mark is in good condition. - Replace the vague or damaged warning mark. Welding If you should cut or weld the refrigerant system pipes in the process of maintaining, please follow the steps as below: a.
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Page 14: Preparation Of Installation
2. Preparations of installation 2.1 Transport In order to avoid scratch or deformation of the unit surface, please use guard boards to contacting surface. No contact of fingers and other things with the vanes. Do not incline the unit more than 25° to move. While installing the unit, keep the unit vertical. ＜... - Page 15 Seaside where the air contains salt. Hot spring area where there are some corrosive gases like sulfide gas. Factories where the high voltage power fluctuates seriously. Inside a car or cabin. The place with direct sunlight and other heat supplies. If it is not avoid, please install a covering or take other measurement.
- Page 16 2.6 Unit dimension ΦD Model SLA-R18-190*** 510mm 2175mm SLA-R25-250*** 640mm 1800mm SLA-R25-300*** 640mm 2010mm...
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Page 17: Installations
3. Installations It is NECESSARY for installation to conform with AS/NZS 3500.4. WARNING Water quality requirements (chloride and pH): In areas of water supplies with high chloride levels, water can corrode certain parts, causing them to fail. Not suitable for heat pump units and storage tank units if the chloride content exceeds 200 mg/l. pH is a measure of whether water is alkaline or acidic. - Page 18 CAUTION Water piping system as the above figure. When install the unit at a place where outside temperature below freezing point, the insulation must be provided for all hydraulic components. The handle of PTR valve should be pulled out once per half a year to confirm that there is no jam of the valve. At the same time, please take care of hot water from the valve and burning.
- Page 19 3.3 Condensate water drainage To smoothly drain the condensate water, please install the unit at a horizontal floor. At the same time, please ensure the drainage joint is at the lowest level. Recommending the inclination angle of the unit to the ground should be no more than 2°.
- Page 20 WARNING In order to ensure safety, the air switch with leakage protection must be installed at the external power supply box of the unit as shown above. This product can be used only when the grounding is confirmed to be reliable. 3.4.2 Specifications of power supply SLA-R25-250*** SLA-R18-190***...
- Page 21 3.5 Installation checking 3.5.1 Location checking The flooring beneath the water heater must be able to support the weight of the unit when filled with water. Located indoors (such as a basement or garage) and in a vertical position. Sheltered from the freezing temperatures.
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Page 22: Trial-Running
4. Trial-running 4.1 Water affusion before operation If the unit is used for the first time or used again after emptying the water tank, please make sure that the tank is full of water before turning on the power. Method: please refer to the figure. When water flows out from the hot Open the cold water inlet valve water outlet, the tank is full. -
Page 23: Operation
4.3 Checking list before commissioning Correct installation of the system. Correct power supply. Correct connection of the water and wiring. No air in the water pipeline and all valves opened. Condensate draining smoothly well insulation work Effective electric leakage protector installation. for all hydraulic part. - Page 24 5.3 Explanation of buttons Icons Name Icons Name Setting button ON/OFF button Timer button Increase/up button Mode - lock button Decrease/down button 5.3.1 On/Off button In the unit standby state, hold down this button for 2 seconds to switch on the unit. When the unit is running, hold it down for 2 seconds to shutdown the unit.
- Page 25 Notes If unit is set to run under Fast heating mode or Electric heater mode, the unit will switch to heat pump mode with factory If unit is set to run under Fast heating mode or Electric heater mode, the unit will switch to heat pump mode with factory setting temperature (set point temperature for heat pump control) from other mode automatically after 24 hours.
- Page 26 5.3.4 Timer button Press the timer button to set the clock and timer on/off. Clock setting - Step 1: Press the Timer button to set the clock. So the hours of clock begins to flash. Step 2: Press Increase or Decrease button to set correct hours of clock. After setting the hours, press the Timer button again to begin to set the minutes of clock.
- Page 27 Step 3: Press Increase or Decrease button to set correct minutes of clock. Finally, press the timer button agian to confirm and exit the clock setting. Timer setting - Step 1: Hold down the Timer button for 5 seconds till the icon of timer on is flashed and the icon of timer off displayed.
- Page 28 Step 2: Press Increase or Decrease button to set required hours of timer on. After setting the hours, press the Timer button again to begin to set the minutes of timer on. So the minutes begins to flash. Notes: During the setting of timer on, the icon of timer on will keep flashing. Step 3: Press Increase or Decrease button to set required minutes of timer on.
- Page 29 Step 4: Press Increase or Decrease button to set required hours of timer off. After setting the hours, press the Timer button again to begin to set the minutes of timer off. So the minutes begins to flash. Notes: During the setting of timer off, the icon of timer off will keep flashing. Step 5: Press Increase or Decrease button to set required minutes of timer off.
- Page 30 Cancelling timer setting - In the process of timer on/off setting, press the Set button, and all the timer setting will be canceled. 5.3.5 Increase/up button and Decrease/down button These two buttons is used when the temperature setting, the clock setting and parameters query. Under the running state of the unit, the water setting temperature can be raised by pressing the increase/up button, while the water setting temperature can be lowered by pressing the Decrease/down button.
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Page 31: Troubleshooting
6. Troubleshooting 6.1 Non-error tips Why compressor cannot start immediatedly after setting? Unit will wait for 3 minutes to balance the pressure of the refrigerant system before starting compressor agian. It is a self protection logic of the unit. Why sometimes the temperature shown on the dispay decreased while unit is running? When the temperature of layer water inside the tank is much higher than the bottom part, upper hot water will be mixed by the bottom cold water which is continually flow from the inlet tap water so that will decrease the water temperature of upper part . - Page 32 6.4 Error code shooting table Code Description Corrective action Check connection to sensor. Lower water temperature Replace sensor if broken. sensor error Replace PCB if broken. Check connection to sensor. Coil temperature sensor error Replace sensor if broken. Replace PCB if broken. Check connection to sensor.
- Page 33 Code Description Corrective action Check connection between PCB and controller if its broken. Communication error Replace the controller is broken. Replace the PCB if its block. NOTE The diagnostic codes listed above are the most common. If a diagnostic code not listed above is displayed, please contact residential technical assistance.
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Page 34: Maintenance
7. Maintenance 7.1 Maintenance Check the connection between power supply plug, socket and groud wiring regularly. In some cold area (blow 0°C), if the unit will be stopped for a long time, all the water should be released in case of freezing of inner tank and damage of boost electrical heater. -
Page 35: Specifications
8. Specifications Model SLA-R18-190*** SLA-R25-250*** SLA-R25-300*** Power supply 220-240V~, 50Hz, 1Ph Running ambient air Temp. -10°C - 40°C -10°C - 40°C -10°C - 40°C Rated water supply pressure 800kPa 800kPa 800kPa PTR valve setting 850kPa 850kPa 850kPa Rated power input (Heat pump) 350W 480W 480W...
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Questions and answers
My SLA-R18-190 stopped the head Pump and the temperature dropped. There was no Power loss. What causes this and how to prevent this in the future?
The heat pump in the Smart Lifestyle SLA-R20-190D/N4A4 may stop and the temperature may drop due to the following reasons:
1. Compressor Delay: After being set, the compressor waits 3 minutes before starting to balance refrigerant pressure. This is a self-protection feature.
2. Temperature Drop During Operation: Cold water from the inlet mixes with the hotter water in the tank, causing the upper water temperature to drop.
3. Temperature Drop Without Unit Activation: The unit only activates when the bottom water temperature drops below the set value to avoid frequent on/off cycling.
4. Error Codes (E01/E02/E04): If these errors appear three times within 30 minutes, the unit stops and won’t restart until the power is reset.
Prevention Measures:
- Allow the unit time to start after setting.
- Ensure correct temperature settings and avoid frequent changes.
- Regularly reset the unit if system errors occur.
- Maintain the unit: clean the tank and heater, check anode rod, and release water if unused in freezing areas.
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After working for over 3 years this system stopped working. How do we reactivate the system? Thank you for your help.
To reactivate the Smart Lifestyle SLA-R20-190D/N4A4 system after it stopped working due to repeated errors (E01/E02/E04 appearing 3 times within 30 minutes), reset the power supply. The unit will not run again until the power is reset.
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