LG THERMA V Series Installation Manual
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LG THERMA V Series Installation Manual

Air-to-water heat pump
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INSTALLATION MANUAL
AIR-TO-WATER
HEAT PUMP
Please read this installation manual completely before installing the product.
Installation work must be performed in accordance with the national wiring
standards by authorized personnel only.
Please retain this installation manual for future reference after reading it
thoroughly.
Air-to-Water Heat Pump
Original instruction
MFL69676201
Rev.01_050219
Copyright © 2016 - 2019 LG Electronics Inc. All Rights Reserved.
www.lg.com

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Summary of Contents for LG THERMA V Series

  • Page 1 Installation work must be performed in accordance with the national wiring standards by authorized personnel only. Please retain this installation manual for future reference after reading it thoroughly. Air-to-Water Heat Pump Original instruction www.lg.com MFL69676201 Rev.01_050219 Copyright © 2016 - 2019 LG Electronics Inc. All Rights Reserved.

  • Page 2: Table Of Contents

    Table of contents TABLE OF CONTENTS IMPORTANT INFORMATION Symbols General Safety warnings and instructions Obligations of the manufacturer Obligations of the installer during installation Obligations of the user INSTALLATION PART GENERAL INFORMATION Model Information Parts and Dimensions INSTALLATION OF OUTDOOR UNIT Conditions where Outdoor Unit is Installed Set up and connection of the external sensor Drill a Hole in the Wall...

  • Page 3: Important Information

    Important information Important information The manual describes the process of installation and maintenance of the device. The installation and maintenance can only be performed by qualified personnel. Read the manual carefully before the installation, this way you will be informed about the intended use, functionality and process of handling the device.

  • Page 4: General

    Important information General • Read Owner’s manual and Installation manual before installation. • Any altering or replacement of original components of the device voids the manufacturer’s guarantee for safe and functional operation. The manufacturer is not responsible for the consequences and will not acknowledge claims for damages in these cases of undesignated and incorrect use of the device.
  • Page 5 Important information to the device has to be denied to children and persons who are not informed about the operation of the device. • The device must never be cleaned with cleaning agents containing sand, soda, acid or chlorides because these might damage the surface of the device.
  • Page 6 Important information • Do not touch leaked refrigerant directly. • Take care to ensure that power cable could not be pulled out or damaged during operation. • Do not place anything on the power cable. • Do not plug or unplug the power supply plug during operation. •...
  • Page 7 Important information • Putting any kinds of items on or next to the device is prohibited. • The device must not be placed in a room where it cannot be removed. Later walling or setting up of other obstacles next to the device is forbidden. •...

  • Page 8: Obligations Of The Manufacturer

    Important information Obligations of the manufacturer The manufacturer guarantees that the device is in accordance with current European directives and standards. The device is marked with the mark CE and it has all the necessary documentation. We reserve the right to make changes to the manual without prior notice. As manufacturer we do not take responsibility for the consequences arising from: •...

  • Page 9: Installation Part

    Installation Part Installation Part Thank you for choosing LG Electronics Air-to-Water Heat Pump Before starting installation, please ensure that all parts are found inside the product box. INDOOR UNIT BOX Item Image Quantity Indoor unit INSTALLATION MANUAL CONDITIONER Installation Manual Please read this installation manual completely before installing the product.

  • Page 10: General Information

    General Information General Information With advanced inverter technology, is suitable for applications like under floor heating, under floor cooling, and hot water generation. By Interfacing to various accessories user can customize the range of the application. In this chapter, general information of is presented to identify the installation procedure.
  • Page 11 General Information Buyer Model Name Serial Number Platform (Chassis code) B : DHW tank integrated Classification N : Indoor unit of Split type T : DHW tank integrated Heater capacity (kW) 6 : 6 kW Heater Heater electrical ratings 1 : 1Ø, 220-240 V, 50 Hz Heating capacity (kW) Ex ) 16 kW : ‘16’...

  • Page 12: Parts And Dimensions

    General Information Parts and Dimensions Indoor unit Heating/Cooling Inlet Buffer tank Heating/Cooling Outlet Circulating pump Warm sanitary water Electric flow heater DHW - circulation TT3000 Controller Cold sanitary water - supply Condenser Gas pipe 5/8‘‘– refrigerant 3 Way Valve Liquid pipe 3/8‘‘– refrigerant DHW tank Mg.
  • Page 13 General Information Outdoor unit(External) Product Heating Capacity : 12 kW,14 kW,16 kW (unit:mm) Supporter Description Name Liquid-side Service Valve Gas-side Service Valve Air discharge Grill Installation Manual 13...
  • Page 14 General Information Product Heating Capacity : 9 kW (unit:mm) Supporter Description Name Liquid-side Service Valve Gas-side Service Valve Air discharge Grill 14 Air-to-Water Heat Pump...

  • Page 15: Installation Of Outdoor Unit

    Installation of Outdoor Unit Installation of Outdoor Unit The outdoor unit of is installed outside to exchange heat with ambient air. Therefore, it is important to properly secure the outdoor unit against harsh environmental conditions and mechanical injuries. This chapter provides instructions to install the outdoor unit, make a route to connect with the indoor, and precautionary measures to follow if installed around seaside.

  • Page 16: Set Up And Connection Of The External Sensor

    Installation of Outdoor Unit Set up and connection of the external sensor For controlling heating according to the external temperature, it is necessary to install the external temperature sensor. The sensor must be set up in a shady spot. The sensor must not be set up above a window or door. It must be located away from heat sources.

  • Page 17: Installation At Seaside

    Installation of Outdoor Unit Installation at Seaside 1. Air conditioners should not be installed in areas where corrosive gases, such as acid or alkaline gas, are produced. 2. Do not install the product where it could be exposed to sea breezes directly. It can result in corrosion on the product.

  • Page 18: Installation Of Indoor Unit

    Installation of Indoor Unit Installation of Indoor Unit General The device is installed according to capacity Heating/Cooling Inlet DHW – outlet Heating/Cooling Outlet DHW – circulation Electrical and communication connection DHW – inlet Connection to outdoor unit Gas pipe 5/8‘‘– refrigerant Connection to outdoor unit Liquid pipe 3/8‘‘–...

  • Page 19: Location Of The Device

    Installation of Indoor Unit Location of the device • It is obligatory to consider the minimal clearance from obstacles for ensuring unobstructed access for maintenance and service. • The location of the device has to be accessible by manual transport devices to ensure undisturbed delivery of replacement parts and equipment for maintenance and servicing.
  • Page 20 Installation of Indoor Unit Minimal clearances of the external device from walls facilitates seamless operation, maintenance and servicing. (unit:mm) The unit should be installed upwards in a straight manner. 20 Air-to-Water Heat Pump...

  • Page 21: Connection With The Outdoor Unit

    Installation of Indoor Unit Front panel removal Front panel removal Firstly unscrew 2 screws of the panel (A). Open the panel (A) towards yourself and pull upward. After this repeat the procedure for each panel.(B,C) Connection with the outdoor unit The connection between the indoor and outdoor unit is performed via refrigerant pipes and communication line.
  • Page 22 Installation of Indoor Unit P16 Fill with waterproof polyurethane foam P20 Ribbed protective pipe min. ɸ 75 The ribbed protective pipe for the power Protective pipe for external sensors or cable depends on the dimension of the communication cables supply cable Copper pipe Cu –...
  • Page 23 Installation of Indoor Unit 1 Copper pipe 2 Copper pipe held downward 3 Beveler STEP 3: Inserting the screw nut • Remove the screw nut from the exterior unit. • Insert the screw nut into the pipe which has been cleaned. 1 Copper pipe 2 Screw nut STEP 4: Edging...
  • Page 24 Installation of Indoor Unit STEP 5: Testing • Compare the edging of the pipe with the picture below. • In the case of damaged edging, cut off the damaged part and repeat the edging procedure. 1 Circular edging of the pipe of the 4 Inclined edge same length.

  • Page 25: Hydraulic Connection

    Installation of Indoor Unit Hydraulic connection The dimensioning of circulation pumps, valves, safety elements and pipes has to be performed by the design engineer according to the heating/cooling capacity of the device. Before connecting the device, it is necessary to rinse the pipe system thoroughly and remove impurities (solid particles, oils, greases ...).
  • Page 26 Installation of Indoor Unit Ball valve Pressure reducing valve Check valve Safety valve Expansion vessel Charging pipe Circulation pump Cold sanitary water Cold circulation water Warm sanitary water Adjusting the safety valve [MPa (bar)] 0.6 (6.0) System pressure [MPa (bar)] 0.3 (3.0) 0.35 (3.5) 0.4 (4.0)
  • Page 27 Installation of Indoor Unit Heating system For unobstructed and safe operation, it is important to have a heat accumulator with a minimal volume of 40 l (integrated in the IDU). The accumulator is needed for hydraulic balancing, ensuring unobstructed flow and defrosting. A larger accumulator ensures a more balanced temperature of heating and more comfort.
  • Page 28 Installation of Indoor Unit The heating system piping diagram An example of the basic hydraulic scheme of the heating system is as shown below: For other circuits, see The Hydraulic Circuit Diagram Catalogue. Scheme of the heating system in hydro modules with an integrated boiler The elements on the scheme are marked in the following manner: Legend of reading: Mark of the element...
  • Page 29 Installation of Indoor Unit CONNECTING ELEMENTS MARK CHARACTERISTICS TERMINALS Return for heating Supply pipe for heating Processing unit Pipe safety thermostat Spatial Connector on PLC Q1-Q12 Digital outputs of regulation ~ 230 V (input/output module MD1 and MD2) A1-A8 Analogue input (input/output module MD1 and MD2) D1-D9 Digital input (input/output module MD1 and MD2) Basic input/output module 1...
  • Page 30 Installation of Indoor Unit Charging of the heating system Ensure that the venting of the system is strong to avoid malfunctions while operating. An expansion vessel of suitable dimensions must be fitted to the heating system. The expansion vessel must be regulated in accordance with standard EN 12828. For normal operation of the expansion vessel, the vessel's working pressure should be appropriately adjusted.
  • Page 31 Installation of Indoor Unit Setting the pressure for the expansion vessel • Before filling the system with water, check and set the pressure P . The expansion vessel is factory set to the pressure specified on its data label. For correct operation of the system, set the pressure P according to the equation below.
  • Page 32 Installation of Indoor Unit Preparing the heating system Prepare the system according to one of the recommended hydraulic piping diagrams which is specified by the manufacturer of the device. This is the only way to ensure reliable and effective operation of the device. After connecting the device to the heating system, it is necessary to examine all circulating pumps and electric motor valves for correct functioning.
  • Page 33 Installation of Indoor Unit To prevent damage to the components of the hydraulic system, we recommend the additional installation of Micro-bubble venting system. The micro bubbles in the system forms larger bubbles which eventually can cause corrosion of the system, result in system component malfunction and operation disturbance. The table below represents the maximal allowed content of individual substances in the heating water and the influence of these on the heat exchanger.

  • Page 34: Electrical Connection

    Installation of Indoor Unit Electrical connection Connect the indoor unit to the mains according to the instructions described in this chapter. • The final electrical connection can only be performed by the person authorized by the manufacturer to ensure correct and efficient operation of the device. IT IS STRICTLY PROHIBITED FOR UNAUTHORIZED PERSONS TO TAMPER WITH THE ELECTRICAL CONNECTION OF THE DEVICE.
  • Page 35 Installation of Indoor Unit Description of electrical connection board Input/output module MD1 Communication with outdoor unit (PI485) Power supply ~ 230 V / 12 V Connecting clips spatial corrector KT-1(2) RESET button (Thermal protection of the Place of grounding the plated (braided) electrical heater).
  • Page 36 Installation of Indoor Unit Display - process module WM - connection with the WEB module Process module PLC (factory made). TE2 - connection with the input/output RQ2 - connection for resetting the alarm module (factory made). (factory made). TEX - communication with the ODI - RQ1 - connection of the signal for Gateway module PI485.
  • Page 37 Installation of Indoor Unit Proper functioning requires a connection between the terminal clip X5 on the internal unit and connecting clips Bus_A [+] / Bus_B [-] / GND / 10 V on the Gateway PI485 module (Modbus Converter) on the external device. ELEMENTS CONNECTING CHARACTERISTICS...
  • Page 38 Installation of Indoor Unit 38 Air-to-Water Heat Pump...
  • Page 39 Installation of Indoor Unit Connecting the internal control unit – TT3000 Connecting the device to the power source can only be performed by a qualified installer in a voltage-free state! As part of connecting the internal control unit to the connecting clips X1…X7, connect the following cables: •...
  • Page 40 Installation of Indoor Unit TW TX Ethernet BUS-A BUS-B 40 Air-to-Water Heat Pump...
  • Page 41 Installation of Indoor Unit Make sure that all the cables are fed through the cable glands at the top of the unit. In that way you will ensure the tightness of the device. In order to ensure water tightness of the cable routing follow the below instructions: 1.
  • Page 42 Installation of Indoor Unit Connection of power cable Connecting the device to the power source can only be performed by a qualified installer in a voltage-free state! • The supply and communication cables have to be routed into the device and electrical cabinet through separate envisioned ducts and overflows which are installed before the cable clamp.
  • Page 43 Installation of Indoor Unit In case of 1~230 V; 50 Hz connection it is not allowed to connect a secondary bridge between L2 to L3 or L1 to L3 in order to have 3x2 kW electrical heating capacity. Failure to comply may cause internal overheating and fire hazard.
  • Page 44 Installation of Indoor Unit Electrical scheme 44 Air-to-Water Heat Pump...
  • Page 45 Installation of Indoor Unit ELEMENT TERMINAL BLOCK DESCRIPTION L1, L2, L3, N, PE Power cable A5, GND Temperature sensor for external temperature Q11, N Cooling valve Q12, N, PE Additional external source Q7, N, PE Circulation pump of heating cycle 1 (optional) Q8, N, PE Circulation pump of heating cycle 2 (optional) N, Q9+, Q10-...
  • Page 46 Installation of Indoor Unit Pump capacity AHNW16606B0 Pump model : Yonos PARA RS 25/7.0 PWM1 Ku Selecting a water flowrate outside the curves can cause damage to or malfunction of the unit. 46 Air-to-Water Heat Pump...

  • Page 47: Refrigerant Piping

    Piping and Wiring for Outdoor Unit Procedures about refrigerant piping and electric wiring of the outdoor unit are described in this chapter. Most of procedures are similar to those of LG Air Conditioner. Refrigerant Piping Before starting refrigerant piping, constraints in pipe length and elevation should be examined. After meeting all constraints, some preparations are required to proceed.
  • Page 48 Piping and Wiring for Outdoor Unit Preparation for Piping Preparation for piping is shown in the below 5 steps. As main cause of refrigerant leakage is due to defects in flaring work, please carry out the appropriate flaring work as shown below: Step 1.
  • Page 49 Piping and Wiring for Outdoor Unit Connecting Pipe to Indoor Unit Connecting pipe to the indoor unit is shown in the below two steps. Read the following directions carefully. Step 1. Pre-tightening. • Align the center of the pipes and sufficiently tighten the flare nut by hand.
  • Page 50 Piping and Wiring for Outdoor Unit Step 2. Tightening • Align the center of the pipes and sufficiently tighten the flare nut by hand. Continuous • Tighten the flare nut with a wrench until the wrench clicks • Tighten the torque as per values in the table: Outside diameter Torque inch...
  • Page 51 Piping and Wiring for Outdoor Unit Electrical Wiring Two kind of cables should be connected to the outdoor unit : One is ‘Power cable’, the other one is ‘Connecting cable’. Power cable is a cable which is used to supply external electricity to the outdoor unit. This cable is generally connected between the external power source (such as main electric power distribution panel of user’s house) and the outdoor unit.
  • Page 52 Piping and Wiring for Outdoor Unit Point for attention regarding quality of the public electric power supply This equipment complies with respectively: - EN/IEC 61000-3-12 (1) provided that the short-circuit power Ssc is greater than or equal to the minimum Ssc value at the interface point between the user's supply and the public system. It is the responsibility of the installer or user of the equipment to consult the network operator if necessary, that the equipment is connected only to a supply with Ssc value greater than or equal to the minimum Ssc value.
  • Page 53 Piping and Wiring for Outdoor Unit Wiring Procedure for Power Cable and Connecting Cable Step 1. : Disassemble the side panel from the outdoor unit by loosing screws. Step 2. : Connect the Power Cable to the Main Power Terminal and Connecting cable to Control Terminal, respectively.
  • Page 54 Piping and Wiring for Outdoor Unit Connecting the communication cable to the Outdoor Unit The communication cable is intended for CN-PWR CN-OUT communication between the external Gateway PI485(Modbus Converter) and the internal input/output module. Gateway PI485(Modbus Converter) is an accessory. After you assemble the an Gateway PI485 (Modbus Converter) on the C/box(Outdoor Unit),...
  • Page 55 Piping and Wiring for Outdoor Unit < Diagram for Connecting Power cable & Communication cable > Model : AHUW096A3 1(L) 2(N) 1(L) 2(N) Power cable Fuse Switch Outdoor Do not connect cable at terminal block Power supply where plate name is “To Indoor Unit” Model : AHUW146A2, AHUW126A3, AHUW146A3, AHUW166A3 1(L) 2(N) 1(L) 2(N)

  • Page 56: Finalizing

    Piping and Wiring for Outdoor Unit Finalizing After pipes are connected and electric cables are wired, pipe forming and commissioning tests are yet to be performed. Especially, careful attention is required while performing the test for any leakages. As leakage of the refrigerant results in degrading the performance directly. Note that it is almost impossible to detect a leakage point leaked point after all installation procedures are completed.

  • Page 57: Leakage Test And Evacuation

    Piping and Wiring for Outdoor Unit Leakage test and Evacuation Air and moisture remaining in the refrigerant system have undesirable effects as indicated below. 1. Pressure in the system rises. 2. Operating current rises. 3. Cooling(or heating) efficiency drops. 4. Moisture in the refrigerant circuit may freeze and block capillary tubing. 5.
  • Page 58 Piping and Wiring for Outdoor Unit Evacuation 1. Connect the charge hose end described in the Indoor unit preceding steps to the vacuum pump to evacuate the tubing and indoor unit. Confirm that the "Lo and Hi" knob of the manifold Outdoor unit valve is open.

  • Page 59: System Set-Up

    System Set-Up System Set-Up To communicate with IDU & ODU, Installer has to set up dip switch. If not configured correctly, Improper operation can be expected. DIP Switch Setting Turn off electric power supply before configuring the DIP switch • Whenever adjusting DIP switch, turn off electric power supply to avoid electric shock. •...

  • Page 60: Check Points, Maintenance And Troubleshooting

    Parts inspection unit. • Refrigerant leakage degrades the performance. If leakage is found, Refrigerant leakage contact qualified LG air conditioning installation person. Product Installation • While cooling, condensed dew can drop down to the bottom of the Drainage treatment indoor unit. In this case, prepare a drain to drain out (for example, vessel to contain condensed dew) to avoid water drops.

  • Page 61: Care And Maintenance

    Check Points, Maintenance and Troubleshooting Care and Maintenance The electrical and hardware installation of the device must be visually inspected once in a year. If any malfunctions have been detected, contact the authorised personnel. The servicing and maintenance of the device can only be performed by a person authorized by the manufacturer.
  • Page 62 Check Points, Maintenance and Troubleshooting Disturbances in the operation In case of a malfunction during the operation of the device the screen of the internal unit displays “Caution, malfunction”. Search for the malfunctioning message in the manual. For error correction, call the installer who performed the installation of the device.

  • Page 63: Test Run

    Check Points, Maintenance and Troubleshooting Test Run After professional installation, the authorized contractor has to commission of the device. The commissioning can only be performed by a person authorized by the manufacturer! If the commission is performed by an unauthorized person, the warranty period is not applicable. Management of the device must be performed in accordance with current instructions for use.

  • Page 64: Search The Manual Using Your Mobile

    Check Points, Maintenance and Troubleshooting Airborne Noise Emission The sound pressure of this product is below the 70 dB. • The noise level can vary depending on the site. The figures quoted are emission level and are not necessarily safe working levels. Whilst there is a correlation between the emission and exposure levels, this cannot be used reliably to determine whether or not further precautions are required.

This manual is also suitable for:

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