4CAUTIONWARNINGWARNING1. Safety Precautions Read the following “SAFETY PRECAUTIONS” carefully before installation of Air-To-Water Hydromodule + Tank(here after referred to as “Tank Unit”). Electrical works and water installation works must be done by licensed electrician and licensed water systeminstaller respectively. Be sure to use the correct rating and main circuit for the model to be installed. The caution items stated here must be followed because these important contents are related to safety. Themeaning of each indication used is as below.Incorrect installation due to ignorance or negligence of the instructions will cause harm or damage, and theseriousness is classified by the following indications. Please leave this installation manual with the unit after installation.This indication shows the possibility of causing death or serious injury.This indication shows the possibility of causing injury or damage to properties only. The items to be followed are classified by the symbols: Carry out test run to confirm that no abnormality occurs after the installation. Then, explain to user the operation,care and maintenance as stated in instructions. Please remind the customer to keep the operating instructions forfuture reference. If there is any doubt about the installation procedure or operation, always contact the authorized dealer for adviceand information.1. Do not use unspecified cord, modified cord, joint cord or extension cord for power supply cord. Do not share the single outlet with otherelectrical appliances. Poor contact, poor insulation or over current will cause electrical shock or fire.2. Do not tie up the power supply cord into a bundle by band. Abnormal temperature rise on power supply cord may happen.3. Keep plastic bag (packaging material) away from small children, it may cling to nose and mouth and prevent breathing.4. Do not use pipe wrench to install refrigerant piping. It might deform the piping and cause the unit to malfunction.5. Do not purchase unauthorized electrical parts for installation, service, maintenance and etc.. They might cause electrical shock or fire.6. Do not add or replace refrigerant other than specified type. It may cause product damage, burst and injury etc.7. Do not use the hot water produced by the Tank Unit for drinking or food preparation. It may cause illness to the user.8. Do not place containers with liquids on top of the Tank Unit. It may cause Tank Unit damage and/or fire could occurs if they leak orspill onto the Tank Unit.9. Do not use joint cable for Tank Unit / Outdoor Unit connection cable. Use specified Tank Unit / Outdoor Unit connection cable, refer toinstruction CONNECT THE CABLE TO THE TANK UNIT and connect tightly for Tank Unit / Outdoor Unit connection. Clamp the cableso that no external force will be acted on the terminal. If connection or fixing is not perfect, it will cause heat up or fire at theconnection.10. For electrical work, follow local wiring standard, regulation and this installation instruction. An independent circuit and single outlet must beused. If electrical circuit capacity is not enough or defect found in electrical work, it will cause electrical shock or fire.11. For water circuit installation work, follow to relevant European and national regulations (including EN61770) and local plumbing and buildingregulation codes.12. Engage dealer or specialist for installation. If installation done by the user is defective, it will cause water leakage, electrical shock or fire.13. • This is a R410A model, when connecting the piping, do not use any existing (R22) pipes and flare nuts. Using such same may causeabnormally high pressure in the refrigeration cycle (piping), and possibly result in explosion and injury. Use only R410A refrigerant.• Thickness for copper pipes used with R410A must be 0.8 mm or more. Never use copper pipes thinner than 0.8 mm.• It is desirable that the amount of residual oil is less than 40 mg/10 m.14. When install or relocate Tank Unit, do not let any substance other than the specified refrigerant, eg. air etc. mix into refrigerantcycle (piping). Mixing of air etc. will cause abnormal high pressure in refrigeration cycle and result in explosion, injury etc.15. Install according to this installation instructions strictly. If installation is defective, it will cause water leakage, electrical shock or fire.16. Install at a strong and firm location which is able to withstand the set’s weight. If the strength is not enough or installation is not properlydone, the set will drop and cause injury.17. This equipment is strongly recommended to be installed with Residual Current Device (RCD) on-site according to the respective nationalwiring rules or country–specific safety measures in terms of residual current.18. During installation, install the refrigerant piping properly before run the compressor. Operation of compressor without fixing refrigerationpiping and valves at opened condition will cause suck-in of air, abnormal high pressure in refrigeration cycle and result in explosion, injuryetc.Symbol with white background denotes item that is PROHIBITED from doing.Symbol with dark background denotes item that must be carried out.