WH27S - Heat pump LG - Free user manual and instructions

USER MANUAL WH27S LG

HEAT PUMP WATER HEATER Read this owner’s manual thoroughly before operating the appliance and keep it handy for reference at all times. www.lg.com Copyright © 2023 LG Electronics Inc. All Rights Reserved. LG Electronics Inc. Single Point of Contact (EU/UK) : LG Electronics European Shared Service Center B.V. Krijgsman 1, 1186 DM Amstelveen, The Netherlands Original instruction

3DANGER Water temperature above 50 °C can cause severe burns instantly or death from scalding. Be sure to read and follow the warnings on the picture below.

DANGER Water temperature over 50 °C can cause instant severe burns or even death from scalding.Children, disabled and the elderly are at highest risk of scalding.See owner’s manual before setting temperature at water heater.Feel water before bathing or showering.Temperature limiting valves are available, see manual. HOT BURN

Safety Precaution Water Temperature Setting WARNING To reduce the risk of explosion, fire, death, electric shock, injury or scalding to persons, instructions in this manual must be followed. Be sure to fully understand the user’s manual before you install and operate this appliance. If you have any difficulty in understanding or following the instructions in this manual, or have any questions, contact an authorized service center or the local electric utility.

Temperature Time to Produce a Serious Burn 49 °C More than 5 minutes 52 °C 1 ½ to 2 minutes 54 °C About 30 seconds 57 °C About 10 seconds 60 °C Less than 5 seconds 63 °C Less than 3 seconds 65 °C About 1 ½ seconds dnoces 1 tuobAC °86 For determining the proper water temperature for your home, refer to the chart below. NOTE

• To reduce point of use water temperature, Thermostatic Mixing Valves are recommended. These valves automatically mix hot and cold water in branch water lines. It is recommended to useamixing valve. DANGER Households with the elderly, children, or people with disabilities may requirea48 °C or lower thermostat setting to prevent contact with “HOT” water.

DANGER Higher water temperature increases the potential for Hot Water SCALDS Water temperature in the heater is regulated by the buttons on display. The water temperature of this water heater is factory set to 50 °C to comply with safety regulations. For information about adjusting the water temperature, refer to the operation section in this manual.

Local Installation Regulations

IMPORTANT SAFETY INSTRUCTIONS

This appliance must be installed accordance with instructions of this manual, national regulations, and any regulations issued by local authorities and public health bodies. WARNING To reduce the risk of explosion, fire, death, electric shock, scalding or injury to persons when using this product, follow basic precautions, including the following:

Children in the Household: This appliance is not intended for use 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 concerning use of the appliance by a person responsible for their safety. Children should be supervised to ensure that they do not play with the appliance. Take care so that children may not step on the product. Otherwise, children may be seriously injured due to falling down. For use in Europe: This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children without supervision.7

• To reduce the risk of severe injury or death, follow all installation instructions.

• Be sure your appliance is properly installed in compliance with local codes and the provided installation instructions.

• Do not replace any part of your water heater and use only original accessories and spare part unless it is specifically recommended in this manual.

• Do not turn on the electrical power to water heater unless the tank is completely full of water.

• Never attempt to operate this appliance if it is damaged, malfunctioning, partially disassembled, or has missing or broken parts.

• When the product is soaked (flooded or submerged) in water, contact an Authorized Service Center for repair before using it again.

• Moving or installation of the appliance requires two or more people.

• Turn off the power by opening the circuit breaker or removing the fuses before installing.

• Even if the water heater thermostat is set to relatively low, hot water has the potential for scalding. To reduce the risk of scalding, thermostatic mixing valves are recommended.

• Keep packing materials out of the reach of children. Packaging material can be dangerous for children. There is a risk of suffocation.

• Destroy the carton, plastic bag, and other packing materials after the appliance is unpacked. Children might use them for play. Cartons covered with rugs, bedspreads, or plastic sheets can become airtight chambers.

• Connect to a properly rated, protected, and sized power circuit to avoid electrical overload.8

• This appliance must be positioned near to an electrical power supply. Use a power supply of 1.5 mm

or more in the nominal cross-sectional area

• Do not install the water heater on an unstable surface or in a place where there is danger of it falling.

• For installation, always contact the dealer or an Authorized Service Center. There is risk of fire, electric shock, explosion or injury.

• Do not install the water heater in a place where flammable liquids or gases such as gasoline, propane, paint thinner, etc., are stored.

• Always ground the product. There is risk of fire or electric shock

• Install the panel and the cover of the control box safety.

• Do not touch heat exchanger fins with your bare hands. Otherwise, you may get a cut in your hands.

• Do not input air or gas into the system except with the specific refrigerant.

• Do not turn on the circuit breaker or power when covers are removed or opened.

• Make the connection securely so that screw in terminals may not be loosed when pulling cable.

• There is a risk of fire and explosion. Insert gas (nitrogen) should be used when you check plumbing leaks, cleaning or repairs of pipes etc. If you are using combustible gases including oxygen, product may have the risk of fires and explosions. Operation

• Use this appliance only for its intended purpose.

• If the water heater has been subjected to fire, flood or physical damage, disconnect all power to water heater immediately, and DO NOT operate it again until it has been inspected by a qualified person.9

• Do not turn on the water heater unless the tank is completely full of water.

• Do not turn on the water heater if cold water supply shut-off valve is closed.

• Feel water before bathing or showering.

• Even at 50 °C, hot water can scald.

• Do not block the inlet or outlet of air flow.

• Never touch, operate, or repair the water heater with wet hands.

• Do not leave flammable substances such as gasoline, benzene, or thinner near the water heater. (Do not install the unit in potentially explosive atmospheres.)

• Cut off the power supply if there is any noise, smell, or smoke coming from the water heater.

• Make sure that the power cable is neither dirty, loose, nor broken.

• Do not place any objects on the power cable.

• Do not modify or extend the power cable. Scratches or peeling insulation on the power cables may result in fire or electric shock, and should be replaced.

• The supply cord cannot be replaced. If the cord is damaged the appliance should be scrapped.

• Do not expose people, animals, or plants to the cold wind from the water heater for extended periods of time.

• Take care to ensure that power cable could not be pulled out or damaged during operation. There is risk of fire or electric shock.

• Do not touch refrigerant pipe, water pipe and any internal parts while the unit is operating or immediately after operation. There is risk of burns or frostbite, personal injury.

• Additional refrigerant injection is not possible.10

• If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard.

• Disconnect this appliance from the power supply before cleaning and attempting any user maintenance.

• Before draining water heater, turn off the power to product.

• Do not turn on the electrical power to the water heater unless the tank is completely full of water. Technical Safety

• Installation or repairs made by unauthorized persons can pose hazards to you and others.

• The information contained in the manual is intended for use by a qualified service technician who is familiar with the safety procedures and equipped with the proper tools and test instruments.

• Failure to read and follow all instructions in this manual can result in equipment malfunction, property damage, personal injury and/or death. CAUTION To reduce the risk of minor injury to persons, malfunction, or damage to the product or property when using this product, follow basic precautions, including the following: !11

• Install the product onafirm and level floor.

• Do not install the water heater inaplace where leakage of the tank or connections will result in damage to the area adjacent to it or to lower floors of the structure. Where such areas cannot be avoided, it is recommended that a suitable drain pan, adequately drained, be installed under the water heater.

• Install the product so that the noise or hot wind from the appliance may not cause any damage to the neighbors. Otherwise, it may cause dispute with the neighbors.

• Install the drain hose properly for the smooth drainage of water condensation.

• Always inspect gas leakage after the installation and repair of product. Otherwise, it may cause the failure of product.

• In order to avoid a hazard due to inadvertent resetting of the thermal cut-out, this appliance must not be supplied through an external switching device, such as a timer, or connected to a circuit that is regularly switched on and off by the utility. Operation

• Do not step on the product and do not put anything on it.

• Do not use this appliance if any part have been underwater. Immediately contact an Authorized Service Center for replace flooded water heater. Do not attempt to repair the unit. It must be replaced.

• Turn off the power and water supply to water heater and drain water heater if the appliance is to be left for an extended period of time, such as during vacations.Parts and Functions

INSTALLATION Top cover Air intake vents Junction box Air filter Front panel Display decor / Control panel ECO Upper element cover Front decor Lower element cover Heating element Opening for drain valve Water inlet Opening for T&P relief valve Water outlet Condensate drain Rear panel Air outlet Vents

4EN Accessories Included Accessories: Recommended Accessories: Figure Name Figure Name Screw driver Teflon tape Spanner Level Multi-meter Installation Tools Figure Name Figure Name Drain valve T&P relief valve Figure Name Figure Name Drain pan Thermal expansion tank Pressure reducing valve Thermostatic mixing valve

Installation Instructions Air filter Display Primary condensate drain line (3/4” PVC) Secondary condensate drain line (1/2” PVC)

0.5 m Minimum clearance

for installation or service. Ceiling Flexible connection recommended Hot water outlet

• Thermal expansion tank (if required) Shut-off valve Heat trap Min.

Flexible connection recommended Cold water inlet Drain valve Open drain T&P relief valve and discharge line

• In closed system, connect a thermal expansion tank to cold water supply line. See “Thermal Expansion” Section (p.16).

• If copper piping is used, The dielectric unions(field supply) must be installed at the water connections.15

• Installation in a confined space without proper ventilation will lead to higher power consumption.

• Auxiliary drain pan MUST be installed in compliance with local codes. Drain pan kits are available from the store where the water heater purchased, or any water heater distributor. Drain pan should not obstruct cold water inlet or drain valve. - Select space where has enough space for periodic servicing. The air filter, covers, and front panels can be removed to permit inspection and servicing. - Take the weight of the water heater into account and select a place where the floor is strong enough to support the weight of full water heater. - The water heater and water lines should be protected from freezing and high corrosive elements. Do not install water heater in outdoor or unprotected areas. - Install the water heater close to the area of the greatest heater water demand and the center of plumbing system. Long uninsulated hot water lines can waste energy. - Insufficient air exchange will result in increased energy consumption level. - The installation site must be over 1 °C. Minimum Clearances Minimum room size: 20 m

• For future service, a minimum 1 m clearance between any object and the left, right and back side is recommended. Ensure the water heater is horizontal using a spirit level. Keep level parallel in installing the product. Otherwise, it may cause vibration or water leakage. It may cause injury or an accident.16

This will cause the relief valve to open during each heating cycle. We recommend installing an expansion tank to control thermal expansion. Connect the thermal expansion tank to the cold water supply line (see Installation Instructions). For additional information, contact installing contractor, plumbing inspector, or water supplier. NOTE

• Drain valve and T&P relief valve is included in packing box of the water heater. They must be installed in the opening provided for this purpose. Installing T&P Relief Valve Use T&P relief valve included in packing. Installing Drain Valve Thermal Expansion Determine if a check valve is present on the inlet water line. Check with your local water utility. A check valve located in cold water inlet line will create a “closed water system”. As water is heated, it creates an increase in pressure within the water system because the increased volume of water doesn’t have a place to go. Referred to as “thermal expansion”, the rapid pressure increase can quickly reach the safety setting of the relief valve. Unpacking and Removing Shipping Bolts NOTE

• Accessories (drain valve and T&P relief valve) are attached on pallet. Keep it for installation. Unpack all shipping materials from the water heater for proper operation and inspect it for shipping damage.

Remove carton and shipping materials.

Remove the screws from the shipping brackets.

Pull out the shipping brackets.

Slightly tip the water heater and carefully roll the water heater off the pallet.

Apply Teflon tape on the G end to prevent leaking.

Install the drain valve in the opening marked “Drain Valve”.

Apply Teflon tape on the G end to prevent leaking.

Install the T&P relief valve in the opening marked T&P relief valve.17

Connecting T&P Relief Valve Discharge Pipe WARNING The pressure rating of the relief valve must not exceed 1 MPa, the maximum working pressure of the water heater as specified on the data plate.

WARNING DO NOT connect any valve or other restriction to the T&P plumbing. DO NOT connect the T&P plumbing to the condensate plumbing. It must be directly piped to an adequate open drain. Install T&P Relief Valve discharge pipeaccording to local codes and the followinginstructions.- The inside diameter of the discharge pipemust be at least 3/4”.- The discharge pipe must be approved for hotwater distribution and withstand 100 °Cwithout distortion.- The end of the discharge pipe should not bethreaded or concealed and should beprotected from freezing.- Do not insert or install any type of valve,restriction, or reducer coupling in thedischarge pipe.* The water may drip from the discharge pipeof the pressure-relief device and that thispipe must be left open to the atmosphere.* The pressure-relief device is to be operatedregularly to remove lime deposits and toverify that it is not blocked.* A discharge pipe connected to the pressure-relief device is to be installed in acontinuously downward direction and in afrost-free environment. Attach the discharge pipe to outlet of theT&P relief valve. The discharge pipe mustpitch downward from the valve to allowcomplete drainage of both T&P relief valveand discharge pipe. The end of the discharge pipe must bepiped to an adequate open drain. Apply Teflon tape on the G end to preventleaking.18

• When making drain fitting connections to the drain tubing, DO NOT overtighten. Overtightening fittings could crack or damage the condensate drain pan.

• Condensate from this unit is not acidic. The condensate drain lines and connections to the drain piping must meet state and local codes. Do not reduce the drain line size to less than the condensate connection size provided. Ensure that the condensate drain lines maintain a downward slope for proper drainage. The drain line should be insulated to prevent condensation from forming on the outside of the drain line. If no floor drain is available or the drain is above the level of the condensate line, then a common condensate pump with a capacity no less than 7.5 L per day must be installed. Installing Condensate Drain Lines

Apply Teflon tape on the G end to prevent leaking.

Attach elbow with 3/4” slip &3/4”G to the primary drain connection.

Using an approved sealant, insert the PVC pipe into the female end. Condensate drain must be piped to an adequate drain.

Using 1/2” PVC piping, an elbow with 1/2” slip & 1/2” G, and an approved sealant, attach the elbow to secondary drain connection and insert the PVC pipe into the female end.19

Connecting the Water Supply NOTE

DO NOT directly solder or braze to hot or cold water connections. If sweat connections are used, sweat tubing to adapter before installing the adapter to the hot or cold water connections on heater. Any heat applied to the water supply fittings will permanently damage the internal plastic lining in these ports.

The maximum pressure in cold water supplyline is 0.8 MPa. If the supply water is greaterthan 0.8 MPa, install a pressure reducing valve. * Connect the water for filling or refilling theheating system as specified by EN1717/ EN61770 to avoid contamination of drinkingwater by return flow.Refer to “Installation Instructions” forsuggested typical installation. To Fill the Water Heater WARNING Do not turn on the electrical power to water heater unless the tank is completely full of water. The water heater warranty does not cover damage or failure resulting from operation with empty or partially empty tank.

For ease of disconnecting the water heaterfor service or replacement, the installationof unions is recommended on the waterconnections.

Check the type of water pipes in your home. Use fittings adequate for the type of pipe in your home.

Apply Teflon tape on the G end to prevent leaking.

Connect cold and hot water supply using 3/4” G. Install a shut-off valve in the cold waterline near the water heater. Install the insulation on the cold and hotwater pipes. Insulating hot water pipe canincrease energy efficiency.

Make sure that the drain valve on water heater is completely closed.

Turn on the cold water supply

Open each hot water faucet slowly and allow the water to run until it flows with a full stream.

Let the water run full stream for a few minutes.Maximum and minimum wateroperating temperatures (°C)35 / 62Maximum and minimum wateroperating pressure (MPa)- / 0.8If cooper piping used, The water heater should always be connected dielectric connections (filed supply) to avoid corrosion caused by electric currents common in copper water pipes.20

CAUTION In order to avoid a hazard due to inadvertent resetting of the thermal cut-out, this appliance must not be supplied through an external switching device, such as a timer, or connected to a circuit that is regularly switched on and off by the utility.

Making Electrical Connections WARNING Disconnect all power before working on any electrical connections.

WARNING The ground connection is mandatory.

WARNING Never supply power to heating element directly. Upper and lower heating elements are installed on the product.(230 V, 2 kW)

16 A30 mAL1 L2 BR BL NOTE

• All wiring must conform to European and national standards, and must be protected by a 30 mA RCD(Residual current device).

• Means for disconnection must be incorporated in the fixed wiring in accordance with the wiring rules. The water heater must be permanently powered by electricity to ensure correct operation of the impressed current titanium anode (ICCP). Do not turn on power until water heater is completely filled. The appliance can only be connected and operated on a single-phase 230 V AC grid. The electrical installation will include:

• The installation of a residual current device (RCD) having a rated residual operating current not exceeding 30 mA is advisable.

• The rating of the residual current device (RCD) to be installed The supply cord cannot be disconnected from the product. The supply cord cannot be replaced. If the cord is damaged the appliance should be scrapped.21

CAUTION You must have a qualified person investigate the cause of the high temperature condition and take corrective action before placing the water heater in service again.

There is temperature limiting control(ECO) that is located above the upper heating element. If the water temperature becomes excessively high, the temperature limiting control(ECO) shuts off the power to the heating elements. Once the control opens, it must be reset manually. To reset temperature limiting control(ECO): Insulation Blanket Kits External insulation blanket, available to thegeneral public, for water heater is notnecessary.The manufacturer’s warranty does not coverany damage or failure caused by installing orusing any type of unauthorized energy-savingor other devices.The manufacturer is not responsible for anyinjury or loss resulting from the use of suchunauthorized devices. CAUTION If local codes require application of any external insulation blanket kit to water heater, it will require careful attention so as not to restrict the proper function and operation of this appliance: - DO NOT block the air openings of the water heater. - DO NOT cover or attempt to relocate the information or warning labels attached to the water heater. - DO NOT cover the control panel, T&P relief valve, drain valve, and junction box. - Inspect the blanket frequently.

Turn off the power by opening the circuit breaker or removing the fuses.

Remove the front decor and upperelement cover.

Installation Checklist Location Sufficient room for air exchange and periodic service. Floor is strong enough to support water heater. Indoor and protected from high corrosive elements. Close to the area of heater water demand. Over 1 °C. Area free of flammable liquids and gases. Drain valve Drain valve properly installed. T&P relief valve T&P relief valve properly installed. Discharge line maintains a downward slope and runs to adequate drain. Discharge pipe protected from freezing. Condensate Drain Drain lines maintain a downward slope and run to adequate drain. Water supply Tank is completely full of water. Remove air from water heater and piping. Flexible water connections recommended. Wiring Power supply voltage agree with rating voltage on data plate. Proper size of branch circuit wire and fusing or circuit breaker. Unit properly grounded. Water connections tight and free of leakage but DO NOT overtighten. If cooper piping used, connect the dielectric unions(field supply) to prevent corrosion.23

The water temperature will be maintainedaccording to the setting temperature onDisplay and can be adjusted from 35 °C to60 °C. Operation Mode

• Press Mode button repeatedly to select the operating mode. The active mode is displayed on the display screen.

This mode minimizes power consumption by using only heat pump for heating, but has low recovery.AUTO MODEThis mode is factory set mode for shipping. This mode provides relatively low power consumption and high recovery. This mode primary uses heat pump for heating. Heating elements will provide supplementaryheating, if demand is more than the heatpump can keep up by itself. TURBO MODE This mode provides the highest recovery. This mode uses heat pump and heating element simultaneously.VACATION MODE This feature is recommended when the water heater is not in used for an extended period of time. In this mode, tank temperature will be maintained at about 20 °C to minimize energy consumption and prevent the water heater from freezing.The vacation duration can be set or modifiedbetween 1 and 90 days via LG ThinQ app. Water Temperature Adjustment SCHEDULE MODEThis mode can set only in LG ThinQapplication. You can escape this mode bypressing any button on the water heater.ANTI-LEGIONELLA MODEThe water heater automatically performs theanti-legionella mode once a week. The watertemperature will go up to 60 °C and stay for 1hour. These temperature can scald, so werecommend you use a thermostatic mixingvalves. (Default inactive)Active / Inactive Press and hold Set button about 3 seconds toset the anti-legionella mode active or inactiveActive: (Display Blinks “Anti-legionella” “Anti-legionella” x 4)* Once a week operation Inactive: (Display Blinks “Anti-legionella” x 4) DANGER Higher water temperature increases the potential for Hot Water SCALDS.

Reset the Air Filter Alarm The device will display alarm ( ) reminding you to check and clean the air filter periodically.

• Press and hold Set button about 3 seconds to reset the alarm. Change Temperature Unit Temperature unit display on Screen can be set to Fahrenheit or Celsius
• Press and hold button about 3 seconds to change temperature unit. Current water Temperature

• Press and hold button about 3 seconds Display will show current water temperature of the tank for 5 seconds. Wi-Fi PAIRING FUNCTION Once it is connected to the internet through a home Wi-Fi network, you can control the appliance remotely with the application for the smart phone. See “SMART FUNCTION” sectionfor details.
• Press and hold Mode button about 3 seconds. is displayed on the display screen.

Press or button to select thewater temperature. Press Set button to finish.25

LG ThinQ Application This feature is only available on models withthe or ThinQ logo. The LG ThinQ application allows you tocommunicate with the appliance using asmartphone. LG ThinQ Application Features Communicate with the appliance from asmartphone using the convenient smartfeatures. Smart Diagnosis

If you experience a problem while using theappliance, this smart diagnosis feature willhelp you diagnose the problem. Settings Allows you to set various options on theappliance and in the application. NOTE

• If you change your wireless router, internetservice provider, or password, delete theregistered appliance from the LG ThinQapplication and register it again.• The application is subject to change forappliance improvement purposes withoutnotice to users.• Functions may vary by model. Before Using LG ThinQ Application NOTE
• To verify the Wi-Fi connection, check thaticon on the control panel is lit.• The appliance supports 2.4 GHz Wi-Finetworks only. To check your networkfrequency, contact your Internet serviceprovider or refer to your wireless routermanual.• LG ThinQ is not responsible for any networkconnection problems or any faults,malfunctions, or errors caused by networkconnection.• If the appliance is having trouble connectingto the Wi-Fi network, it may be too far fromthe router.Purchase a Wi-Fi repeater (range extender)to improve the Wi-Fi signal strength.• The Wi-Fi connection may not connect ormay be interrupted because of the homenetwork environment.• The network connection may not workproperly depending on the Internet serviceprovider.• The surrounding wireless environment canmake the wireless network service runslowly. Turn off the Mobile data or Cellular Dataon your smartphone. Connect your smartphone to the wirelessrouter. Check the distance between the applianceand the wireless router (Wi-Fi network).• If the distance between the applianceand the wireless router is too far, thesignal strength becomes weak. It maytake a long time to register or installationmay fail. SMART FUNCTIONS26

Use this feature to help you diagnose and solve problems with your appliance. NOTE

• For reasons not attributable to LGE’s negligence, the service may not operate due to external factors such as, but not limited to, Wi-Fi unavailability, Wi-Fi disconnection, local app store policy, or app unavailability.

• The feature may be subject to change without prior notice and may have a different form depending on where you are located. Using LG ThinQ to Diagnose Issues If you experience a problem with your Wi-Fi equipped appliance, it can transmit troubleshooting data to a smartphone using the LG ThinQ application.

• Launch the LG ThinQ application and select the Smart Diagnosis

feature in the menu. Follow the instructions provided in the LG ThinQ application. Open Source Software Notice Information To obtain the source code that is contained in this product, under GPL, LGPL, MPL, and other open source licenses that have the obligation to disclose source code, and to access all referred license terms, copyright notices and other relevant documents, please visit https://opensource.lge.com. LG Electronics will also provide open source code to you on CD-ROM for a charge covering the cost of performing such distribution (such as the cost of media, shipping, and handling) upon email request to [e-mail]. This offer is valid to anyone in receipt of this information for a period of three years after our last shipment of this product.

• The appliance cannot be registered due to problems with the wireless signal transmission. Unplug the appliance and wait about a minute before trying again.

• If the firewall on your wireless router is enabled, disable the firewall or add an exception to it.

• The wireless network name (SSID) should be a combination of English letters and numbers. (Do not use special characters.)

• Smartphone user interface (UI) may vary depending on the mobile operating system (OS) and the manufacturer.

• If the security protocol of the router is set to WEP, you may fail to set up the network. Please change it to other security protocols (WPA2 is recommended) and register the product again. Installing the LG ThinQ Application Search for the LG ThinQ application from the Google Play Store or Apple App Store on a smartphone. Follow instructions to download and install the application.27

WARNING Turn off the power by opening thecircuit breaker or removing the fusesbefore you perform any maintenance;otherwise it may cause electrical shockresulting in severe injury or death.

Draining and Flushing the Water Heater Minerals contained in tap water can form limedeposits. Therefore, it is not uncommon thatlime deposits accumulate in the water heater’stank. The amount of lime deposits depends onwater hardness, the temperature settings, andother variables.Clean and check the product regularly tomaintain optimal performance and to preventpossible break down. If you have difficultly toperform these routine maintenance tasksyourself, contact a qualified person.Before you perform any maintenance, turn offthe power by opening the circuit breaker asbelow Turn off the power by opening the circuitbreaker or removing the fuses. Connect a garden hose to the drain valveand place the and of the hose in a suitabledrain. Turn off the cold water supply valve. Open the drain valve. (Open a hot waterfaucet or lift the handle on the T&P reliefvalve to help the water drain faster.) Once the tank is empty, flush the tank byopening the cold water supply valve. Allow the water run until no more sedimentdrains from the tank and water runs clear. Close the drain valve and open the hotwater faucet. Fill the tank by opening thecold water valve. MAINTENANCE28

DANGER Before manually operating the reliefvalve, make sure it will discharge in asafe place. If water does not flow freelyfrom the end of the discharge pipe, turnoff the power to water heater and call aqualified person. At least annually, lift and release the leverhandle on water heater to ensure thewaterways are clear and the valve operatesfreely. Air Filter Maintenance Clean the air filters when “Air filter check ( )” alarm appears on the display. NOTE

• The air filter can be broken when it is bended.
• When the air filter is not assembled correctly, dust and other substance come into the unit. T&P Relief Valve Maintenance

Turn off the power by opening the circuit breaker or removing the fuses.

Hold the knobs of the air filter, pull it and remove it from the top cover.

Clean the filter with a vacuum cleaner or with lukewarm water with neutral detergent.

Dry the filter in the shade.

Insert the air filter into the top cover.

Check the top cover for correct assembly of the air filter.29

Shut-down for an Extended Period If the water heater will not be used for an extended period of time, turn off the power and water supply to water heater and drain water heater to conserve energy and prevent a build-up of dangerous hydrogen gas. The water heater and piping should be drained if they might be subjected to freezing temperature. After a long shutdown period, the water heater’s operation and controls should be checked by qualified service personnel. Make certain the water heater is completely filled again before placing it in operation. Condensate Drain Maintenance

Remove the condensate drain lines and connections.

Pull the front decor first, and then remove the top cover. Lift the front panel out, then slightly lift the rear panel and remove it.

Check the condensate drain pan for any debris, and clean the condensate drain by wiping out with a damp cloth or pouring a cup of bleach.

Reattach top cover and side panel and connect the condensate drain line.

Restore power to the water heater.30

Before Calling for Service Please check the following before you contact the service center. If the problem persists, contact your local service center. CAUTION For your safety, do not attempt to repair of electrical wiring, controls, heating elementsor other safety devices. Refer repairs to qualified service personnel

Problem Possible Causes & Corrective ActionInsufficient or nohot waterWater usage exceeds the capacity of the water heater in current mode• Wait for the water heater to recover after an abnormal demand.• Change the mode for higher recovery.Water temperature set too low• See the “Water Temperature Adjustment” section.(Page 24)ECO tripped• See “Safety Controls” section.(Page 21)No electric supply to the water heater• Check the electric supply to water heater. See “Making ElectricalConnections” section.(Page 20)Water connections to unit are reversed• Re-install water connection correctlyLeak in hot water faucets or plumbing system• Make certain all faucets are closed.• Check home for any leaks and repairImproper electric wiring• See “Making Electrical Connections” section.(Page 20)Cold water inlet temperature may be lower in winter• This is normal. The colder inlet water takes longer to heat.Dirty air filter• See “Air Filter Maintenance” section.(Page 28)Not enough clearance to air exchange for heat pump• Make sure unit has enough clearance. See “Select the best Location”section.(Page 15)Open fuse or a circuit breaker tripped• Replace fuse or reset circuit breaker.Water is too hotWater temperature set too high• See the “Water Temperature Adjustment” section.(Page 24) TROUBLESHOOTING31

Problem Possible Causes & Corrective Action Noise The heat pump compressor, fan, or EEV valve is running

• This is normal Build up of scale or lime deposits on heating elements may cause rumbling noise

• Clean or replace the heating elements. This should only be performed by qualified service person. Call our Technical Support Center. Drips from the outside of the heater Condensate drain is blocked

• Clean the drain port and remove the debris. Hot/Cold water connections or other parts have loosened

• Tighten the loose connections. This should only be done by a qualified service person. Noise and drips from relief valve Pressure build-up due to thermal expansion in a closed water system.

• This is an unacceptable condition and must be corrected. Do not plug the T&P relief valve outlet. Contact a plumbing contractor to correct this. Water pressure is low Supply valve is partially closed

• Open the water heater’s supply valve fully. Trouble connecting appliance and smartphone to Wi-Fi network. The password for the Wi-Fi network was entered incorrectly.

• Delete your home Wi-Fi network and begin the registration process again. Mobile data for your smartphone is turned on.

• Turn off the Mobile data on your smartphone before registering the appliance. The wireless network name (SSID) is set incorrectly.

• The wireless network name (SSID) should be a combination of English letters and numbers. (Do not use special characters.) The router frequency is not 2.4 GHz.

• Only a 2.4 GHz router frequency is supported. Set the wireless router to 2.4 GHz and connect the appliance to the wireless router. To check the router frequency, check with your Internet service provider or the router manufacturer. The distance between the appliance and the router are too far.

• If the appliance is too far from the router, the signal may be weak and the connection may not be router closer to the appliance or purchase and install a Wi-Fi repeater.29 Comp Phase is Over-Current. Call our Technical Support Center. Use Elements Only

Discharge pipe Temp sensor is not working.

Suction Pipe Temp sensor is not working. 61 Cond. Pipe Temp is High.(65

Heat sink Temp senor is not working. 67 BLDC motor fan is locked. DF No or not enough water in tank. Fill water heater with water. Open all hot water faucets until water flows with a full stream. OFF EC ECO is tripped. Disconnect all power to water heater. See “Safety Controls” section. Call our Technical Support Center. OFF

Water Temp is too High. Call our Technical Support Center. OFF

L1 Water Temp is too Low. Call our Technical Support Center. OFF

Water Temp is too low or upper tank Temp sensor is not working. IC ICCP is not functioning Call our Technical Support Center. OFF

Ambient Temp sensor is not working. Call our Technical Support Center. Use Elements Only

Condensate drain is blocked. Clean Condensate drain. See “Condensate Drain Maintenance” section. Use Elements Only

Lower tank Temp sensor is not working. Call our Technical Support Center. OFF

Mid pipe Temp sensor is not working.

Upper element is not working. Call our Technical Support Center. Use Heat Pump Only

Lower element is not working.

DC Peak (IPM Fault). Call our Technical Support Center. Use Elements Only

CAUTION For your safety, Do not attempt to repair electronic controls, electrical wiring, heat pump, heating elements or other safety devices by yourself. Refer repair to authorized service center.

• Check the water heater’s rating plate on the unit for the acceptable voltage and wattage. Replacement parts can be ordered through the distributor or store where the heater was purchased. All parts order should include following information:

1. Model and serial number of the products.

2. Voltage and wattage as marked on rating plate.

Technical specification Description Unit WH20S F5 WH27S F5 Tank Capacity L 200 270 Dimension (Width x Height x Depth) mm 580 x 1625 x 582 580 x 2008 x 582 Weight empty kg 100 119 Diameter of water connections - G 3/4” Diameter of condensate drainage connections - 3/4” 1/2” Type of corrosion protection - Impressed Current Cathodic protection Type of internal tank protection - Ceramic coated Max Working pressure MPa 1 Setting range of the water temperature °C 35 to 60 Operating temperature range of the heat pump °C -5 to 48 Refrigerant R134a kg 0.65 0.75 Refrigerant volume in equivalent tonnes T.eq.CO

Refrigerant design pressure (high side / low side) MPa 2.0 / 0.9 Power supply Voltage V 230 Frequency Hz 50 Total Max power consumption W 2600 Max power consumption by heat pump W 550 Max power consumption by heating element W 2050 Protection rating IPX1 Air side Air flow rate (H/M) m

• The installation of a residual current device (RCD) having a rated residual operating current not exceeding 30 mA is advisable.