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LG THERMA V AHNW16606B0 Installation Manual Download Page 51

Piping and Wiring for Outdoor Unit

Installation Manual 

51

ENGLISH

The power cord 

connected to the outdoor unit should be complied 

withIEC 60245 or HD 22.4 S4 (This equipment shall be provided with a 
cord set complying with the national regulation. 

 

The connecting cable

 connected to the outdoor unit should be 

complied with IEC 60245 or HD 22.4 S4 (This equipment shall be 
provided with a cord set complying with the national regulation.) 

If the supply cord is damaged, it must be replaced by a special cord or assembly availible from the manufacturer of its service agent.

NORMAL CROSS-SECTIONAL AREA

20mm

GN/YL

NORMAL
CROSS-SECTIONAL
AREA 0.75 mm

2

When the connection line between the indoor unit and 
outdooor unit is over 40 m, connect the telecommunication 
line and power line separately. 

GN/

YL

1 Phase(Ø)

20 

mm

3 Phase(Ø)

20 

mm

GN/

YL

Precautions when laying power wiring

Use round pressure terminals for connections to the power terminal block.

In absence of the pressure terminals, follow the instructions below.
• Do not connect wiring of different thicknesses to the power terminal block. (Slack in the power wiring may cause abnormal

heat.)

• When connecting wiring which is the same thickness, do as shown in the correct figure as below:

Make sure that the screws of the terminal are not loosely fitted.

Round pressure terminal

Power wire

Model

Phase (Ø) Area (mm

2

)

AHNW16606B0

1

4

AHUW146A2 

6

AHUW096A3 

AHUW126A3 

AHUW146A3 

AHUW166A3

AHNW16606B0

3

2.5

AHUW128A3 

AHUW148A3 

AHUW168A3 

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. Conversely, connection cable is used to connect
between the outdoor unit and the indoor unit to supply electric power to the indoor unit and to establish
the communication between the outdoor unit and the indoor unit. 

Procedure for wiring to the outdoor unit is performed in four steps. Before starting the wiring, check if the
wire specification is suitable and read the following directions and cautions VERY carefully.

Electrical Wiring

Summary of Contents for THERMA V AHNW16606B0

Page 1: ...h the national wiring standards by authorized personnel only Please retain this installation manual for future reference after reading it thoroughly INSTALLATION MANUAL AIR TO WATER HEAT PUMP MFL69676201 Rev 01_050219 www lg com Copyright 2016 2019 LG Electronics Inc All Rights Reserved ENGLISH ITALIANO ESPAÑOL FRANÇAIS DEUTSCH ΕΛΛΗΝΙΚΆ ČEŠTINA NEDERLANDS POLSKI LIMBA ROMÂNĂ ...

Page 2: ...rnal sensor 16 Drill a Hole in the Wall 17 Installation at Seaside 17 Seasonal wind and cautions in winter 18 INSTALLATION OF INDOOR UNIT 18 General 19 Location of the device 21 Connection with the outdoor unit 25 Hydraulic connection 34 Electrical connection 47 Refrigerant Piping 47 PIPING AND WIRING FOR OUTDOOR UNIT 56 Finalizing 57 Leakage test and Evacuation 59 SYSTEM SET UP 59 DIP Switch Sett...

Page 3: ...ian is trained and authorized by the manufacturer to perform maintenance and servicing of the device The user uses the device according to its use The installer is a person professionally trained for performing hardware and or electric installation work and mounting of the device Incorrect use of the device can lead to damage to the device property or injury to the user To reduce risk the manual p...

Page 4: ... can lead to serious injury or death Connecting the device to the power source can only be performed by a qualified personnel It is prohibited to move shift clean or service the device while in operation It is prohibited to play with the device Children are not allowed to clean the device without supervision The device can be operated independently only by informed persons who are familiar with th...

Page 5: ...le of the device is damaged it has to be replaced The replacement can only be performed by the manufacturer and authorized maintenance worker Before opening the device disconnect all electrical circuits and make sure the device is not under voltage Do not use a defective or underrated circuit breaker Use this appliance on a dedicated circuit For electrical work contact the dealer seller a qualifie...

Page 6: ...quipped Do not touch any electric part with wet hands you should be power off before touching electric part Do not touch refrigerant pipe and water pipe or any internal parts while the unit is operating or immediately after operation If you touch the pipe or internal parts you should be wear protection or wait time to return to normal temperature Turn the main power on 6 hours ago before the produ...

Page 7: ...e overvoltage category III Always check for gas refrigerant leakage after installation or repair of unit Keep level even when installing the unit Use two or more people to lift and transport the unit Do not use the unit for special purposes such as preserving foods works of art etc Use a soft cloth to clean Do not use harsh detergents solvents etc Do not step on or put anything on the unit Use a f...

Page 8: ...ce with the following requirements To thoroughly study the instructions for use and installation accompanying the device before installation To install the device in accordance with the instructions and national legislation policies and standards in force For ensuring unobstructed and effective operation of the device the user has to follow the following instructions To thoroughly study the instru...

Page 9: ...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 INSTALLATION MANUAL AIR CONDITIONER 1 Owner s Manual www lg com Please read this manual carefully before operating your set and retain it for future reference OWNER S MANUAL AIR CONDITIONER 1 OUTDOOR UNIT BOX Item Im...

Page 10: ... Factory Model Name A H N W 1 6 6 0 6 B 0 Series Number Function B DHW tank inegrated with Buffer tank D DHW tank integrated Heater Capacity kW 06 6 kW Heater Electrical ratings 6 1 phase 220 240 V AC 50 Hz Heating Capacity kW 16 16 kW Model Type W Inverter Heat Pump H Heat Pump Classification N Indoor Unit Air to Water Heat Pump for R410A A H U W 0 9 6 A 3 Series Number Function A General heating...

Page 11: ...380 415 V AC 50 Hz Heating capacity kW Ex 9 kW 09 U Outdoor unit Classification H Air to water Heat Pump H N 16 1 6 T N B 0 Serial Number Platform Chassis code B DHW tank integrated Classification N Indoor unit of Split type T DHW tank integrated Heater capacity kW Heater electrical ratings 1 1Ø 220 240 V 50 Hz 6 6 kW Heater Heating capacity kW Ex 16 kW 16 N Indoor unit Classification H Air to wat...

Page 12: ...nlet A Buffer tank 2 Heating Cooling Outlet B Circulating pump 3 Warm sanitary water C Electric flow heater 4 DHW circulation D TT3000 Controller 5 Cold sanitary water supply E Condenser 6 Gas pipe 5 8 refrigerant F 3 Way Valve 7 Liquid pipe 3 8 refrigerant G DHW tank 8 Mg Anode 2 045 1 978 unit mm ...

Page 13: ...nual 13 ENGLISH General Information Outdoor unit External Supporter 490 Description No Name 1 2 3 Liquid side Service Valve Gas side Service Valve Air discharge Grill Product Heating Capacity 12 kW 14 kW 16 kW unit mm ...

Page 14: ...14 Air to Water Heat Pump General Information Supporter Description No Name 1 2 3 Liquid side Service Valve Gas side Service Valve Air discharge Grill Product Heating Capacity 9 kW unit mm ...

Page 15: ...sunroof is built over the unit to prevent direct sunlight or rain exposure make sure that heat radiation from the heat exchanger is not restricted Ensure that the spaces indicated by arrows around front back and side of the unit Do not place animals and plants in the path of the warm air Consider weight of the outdoor unit into account and select a place where noise and vibration are minimum Selec...

Page 16: ... in the Wall 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 For measuring external temperature the sensor type PT 1000 is used T Temperature sensor for external temperature The external sen...

Page 17: ...utdoor Unit facing the seasonal wind Periodic more than once a year clean the impurities settled on the heat exchanger by using water 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 Corrosion particularly on the...

Page 18: ...HW outlet 2 Heating Cooling Outlet 4 DHW circulation C Electrical and communication connection 5 DHW inlet E Connection to outdoor unit 6 Gas pipe 5 8 refrigerant D Connection to outdoor unit 7 Liquid pipe 3 8 refrigerant P6 Power supply cable P7 Communication cable connection between outdoor and indoor unit Installation of Indoor Unit ...

Page 19: ...sts connected with hiring special equipment for installing the device servicing and maintenance separately these costs are not subjected to warranty When you install a device into the building ensure that you build in a water drain in case of spillage Minimal clearance from the device The device must not be installed under pipelines because there is a possibility of condensate forming Ingress of w...

Page 20: ...r Heat Pump Installation of Indoor Unit Minimal clearances of the external device from walls facilitates seamless operation maintenance and servicing The unit should be installed upwards in a straight manner unit mm ...

Page 21: ...events the pipe connections soaking in cases of heavy groundwater or rainfall and with it intensive draining of heat into its surroundings Gas and liquid connection The pipe connection between the external and internal devices can be made by positioning the pipes in two ways A inside two separate ribbed protective pipes B in one joint ribbed protective pipe Connection with the outdoor unit Firstly...

Page 22: ...order to ensure connecting the internal and external device normally STEP 2 Removal of chips Remove all chips from the part where the pipe was cut Hold the pipe downward during cleaning so that the chips do not fall into the pipe A B P16 Fill with waterproof polyurethane foam P20 Ribbed protective pipe min ɸ 75 P17 Protective pipe for external sensors or communication cables P21 The ribbed protect...

Page 23: ... STEP 4 Edging The edging has to be performed with tools for edging as shown Mount the copper pipe firmly into the tool for edging Consider the dimensions listed in the table below 1 Copper pipe 2 Copper pipe held downward 3 Beveler 1 Copper pipe 2 Screw nut 1 Holder 2 Copper pipe 3 Fitting 4 Cone 5 Bracket 6 Handle 7 Holder External diameter A mm inch mm 9 52 3 8 1 5 1 7 15 88 5 8 1 6 1 8 ...

Page 24: ...cated at the top of the unit Please refer to the device drawing for additional information STEP 2 Mounting Align with the middle of the pipe and then tighten the screw nut by hand Tighten the screw nut with a torque wrench until it clicks Prescribed torques for tightening External diameter Torque mm inch Nm 9 52 3 8 34 42 15 88 5 8 65 81 1 Circular edging of the pipe of the same length 2 Circularl...

Page 25: ...ly Because different materials are used for pipe installation all connections on the device cold and hot water circulation heat conductor have to be galvanically isolated otherwise corrosion of connections can occur on the inner side of the buffer tank for DHW We recommend placing galvanic isolators made of red brass the length of at least twice the diameter of the pipe on the connections The DHW ...

Page 26: ... 5 0 4 4 0 Volume of the DHW L 200 Expansion vessel L 5 8 12 Setting the pressure for the expansion vessel for DHW Expansion vessel for DHW is factory filled to a precharge pressure p0 with dry nitrogen The pressure must be set depending on the settings of the pressure reducing valve on the DHW supply to the building The pressure in the expansion vessel must be set according to the following formu...

Page 27: ...rated 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 When installing an additional larger heat accumulator it is necessary to close the ball valve in the indoor unit The location of the closing valve is indicated on the picture below C C Ball valve ...

Page 28: ...cuit 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 OC1 Mark of the element MD1 Q7 Mark of the connecting clip on the input output module MD Mark of the input output module Installation of Indoor Unit 28 Air to Water Heat Pump MD1 MD2 ...

Page 29: ...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 MD1 Basic input output module 1 T1 Thermostat of heating cycle 1 T2 Thermostat of heating cycle 2 OC1 Circulation pump of heating cycle 1 OC2 Circulation pump of heating cycle 2 MV2 Mixing valve of heating cycle 2 OGK 1 Heating cycle 1 OGK 2 Heating cycle 2 MD2...

Page 30: ...essure should be appropriately adjusted The settings have to be checked once in every 12 months Consider the maximal operational pressure of the expansion vessel and filling the heating system A Filling the system B Expansion vessel C Ball valve with exhaust D Air filling valve H Height of the heating system from expansion vessel to the highest heating body in the building Psv Pressure of the safe...

Page 31: ...um allowed pressure of the heating system P0 max 0 1 MPa 1 bar maximum allowed pressure of the heating system H m Height of the heating system Set the amount of pressure in the expansion vessel by releasing or adding dry nitrogen Record the new value of the pressure P0 on the data label Open the closing valve of the expansion vessel carefully open the vents and close the drain Filling the heating ...

Page 32: ...changer you must install the strainer on the return line inlet into the device A galvanic disconnection between individual elements of the heating system i e boiler container is obligatory In the case of using grey steel pipes in the heating system it is necessary to degrease them the interior of the pipe before connecting them to the heat pump The water in the heating system has to be in accordan...

Page 33: ...essive substances in the heating water based up on the stability of stainless copper welded plate transmitters no influence 0 danger of corrosion corrosion use not permitted The heating system has to be filled with water with the hardness scale between 5 dH and 10 dH Malfunctions of the device caused by water hardness is not covered by the warranty TYPE OF PRESENT SUBSTANCE UNIT CONCENTRATION INFL...

Page 34: ...in accordance with the standards for connecting devices to the electrical network The device has to be connected to the electrical network via the power supply which is provided for electrical installation under the regulations in force The device must be connected to the mains using a cable with appropriate diameter refer to paragraph 7 for more detailed information The electrician defines the ca...

Page 35: ... V 8 Connecting clips spatial corrector KT 1 2 3 RESET button Thermal protection of the electrical heater 9 Place of grounding the plated braided communication cable 4 Connecting clips of external devices 10 Communication with outdoor unit and internal expansion unit TT3003 5 Connecting clips of the power line 11 Connecting clips neutral conductor 6 WEB module Option 12 Electrical contactor ...

Page 36: ...he cable is grounded on the envisioned spot functional earthing 1 2 3 4 5 6 1 Process module PLC 4 WM connection with the WEB module factory made 2 TE2 connection with the input output module factory made 5 RQ2 connection for resetting the alarm factory made 3 TEX communication with the ODI Gateway module PI485 6 RQ1 connection of the signal for reporting an alarm optional Installation of Indoor U...

Page 37: ...supply X5 Connecting terminal for communication with external module Gateway PI485 in Outdoor unit BUS A BUS B Communication GND 10 V Power supply 5 Web module TW MODBUS Communication with PLC TX MODUBUS Not in use Ethernet Internet Ethernet connection PLC Process module WM Communication with Web module TEX Communication with outdoor unit PI485 Gateway TS Communication with the spatial corrector T...

Page 38: ...38 Air to Water Heat Pump X5 BUS A BUS B GND 10V Installation of Indoor Unit ...

Page 39: ...itional external source N Q11 3 x 0 75 mm2 Cooling valve X3 Q7 N 3 x 0 75 mm2 Circulation pump of heating cycle 1 optional Q8 N 3 x 0 75 mm2 Circulation pump of heating cycle 2 optional N Q9 Q10 3 x 0 75 mm2 Mixing valve of heating cycle 2 optional A7 GND 2 x 0 75 mm2 Temperature sensor of mixing heating cycle 2 optional X4 D8 GND 2 x 0 75 mm2 Switch for heating cooling optional D7 GND 2 x 0 75 mm...

Page 40: ...40 Air to Water Heat Pump TW TX Ethernet 5 BUS B BUS A GND 10V Installation of Indoor Unit ...

Page 41: ...nsure water tightness of the cable routing follow the below instructions 1 Make a small hole in the thin rubber membrane for each cable 2 Push the cable through making sure the membrane isn t damaged and that the membrane tightly wraps the cable 3 Pull the cable back for approximately 5 mm to make a positive seal Make sure only one cable is fed through each cable gland hole to ensure a proper wate...

Page 42: ...ollow the requirements listed in this manual Multi strand flexible cables must be connected to the indoor unit terminal blocks with crimped end sleeves Solid core wires do not use crimped end sleeves The device comes with an electrical heater 3 x 2 kW The power supply is connected according to your specifications a 230 V 50 Hz on the connecting clips L1 N and PE Connecting terminals of the supply ...

Page 43: ...cation between the indoor and outdoor For the dimensions of the communication cable see technical data It is important to correctly connect the cable to terminal block X5 The communication cable connects the external device to the terminal terminals X5 on the indoor unit It is necessary to connect the terminals BUS A BUS B and GND and 10 V The communication connection is considered as a low voltag...

Page 44: ...44 Air to Water Heat Pump Installation of Indoor Unit Electrical scheme ...

Page 45: ...nsion unit TT3003 1 Flow electrical heater 2 Tree way valve for switching between heating and DHW 3 Basic input output module MD1 4 D4 Flow switch 5 Web module OPTIONAL TW Modbus Communication with PLC TX Modbus Not in use Ethernet Internet connection 6 A6 Temperature sensor of the supply pipe 7 Q3 Main circulation pump 8 A1 Temperature sensor of the return line 9 Process module PLC WM Communicati...

Page 46: ...r to Water Heat Pump 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 Installation of Indoor Unit ...

Page 47: ... length is longer than 7 5 m additional charge of the refrigerant is required according to the table Example If 16 kW model is installed at a distance of 50 m 1 700 g of refrigerant should be added according to following formula 50 7 5 x 40 g 1 700 g 2 Rated capacity of the product is based on standard length and maximum allowable length is based on the product reliability in the operation 3 Impro...

Page 48: ...0A refrigerant as shown below Firmly hold the copper tube in a bar or die as per the dimensions in the table above Step 5 Check Correspond the flared work to the right figure If the flare seems improper remove the flared section and redo the entire flaring work Preparation for Piping Preparation for piping is shown in the below 5 steps As main cause of refrigerant leakage is due to defects in flar...

Page 49: ...tions The directions are indicated in the below figure The pipes cannot be connected in the downward direction Step 1 Pre tightening Align the center of the pipes and sufficiently tighten the flare nut by hand Step 2 Tightening Tighten the flare nut with a wrench Tighten the torque as per the values in the table Torque wrench Indoor unit tubing Open end wrench fixed Connection pipe Flare nut Indoo...

Page 50: ...gure on the right If insects or small animals enter the outdoor unit it may cause a short circuit Finally fill in the vacuum in between the pipes by wrapping the conducting portion of the indoor unit with insulation material and securing it with two kinds of vinyl tape Note that providing thermal insulation is very important mm inch kgf m 6 35 1 4 1 8 2 5 9 52 3 8 3 4 4 2 12 7 1 2 5 5 6 6 15 88 5 ...

Page 51: ...ng of different thicknesses to the power terminal block Slack in the power wiring may cause abnormal heat When connecting wiring which is the same thickness do as shown in the correct figure as below Make sure that the screws of the terminal are not loosely fitted Round pressure terminal Power wire Model Phase Ø Area mm2 AHNW16606B0 1 4 AHUW146A2 6 AHUW096A3 AHUW126A3 AHUW146A3 AHUW166A3 AHNW16606...

Page 52: ...nnect all the supply lines must be fitted Model of circuit breaker should be recommended by authorized personnel only Model Minimum Ssc Value AHUW146A2 3 142 AHUW096A3 AHUW126A3 AHUW146A3 AHUW166A3 Model Minimum Ssc Value AHUW128A3 2 348 AHUW148A3 AHUW168A3 Point for attention regarding quality of the public electric power supply This equipment complies with respectively EN IEC 61000 3 12 1 provid...

Page 53: ...ply such as sudden voltage increasing or voltage drop down Chattering of a magnetic switch frequent on and off operation Physical damage of parts where magnetic switch is contacted Break of fuse Malfunction of overload protection parts or related control algorithms Failure of compressor start up 10 Ground wire to ground outdoor unit to prevent electrical shock When connecting power cable make sure...

Page 54: ...y After you assemble the an Gateway PI485 Modbus Converter on the C box Outdoor Unit Connect Cables CN OUT CN PWR After routing the plated cable between Indoor unit and Outdoor unit connect four cables you connect to the connection clips Bus_A Bus_B GND 10 V on the Gateway PI485 Modbus Converter module Gateway PI485 Modbus Converter is located on the Outdoor Unit as shown in the picture below CN P...

Page 55: ...r supply R S T N 1 L 2 N 3 S T N R Outdoor Power supply Switch Fuse Power cable Switch Fuse Power cable Model AHUW096A3 Model AHUW146A2 AHUW126A3 AHUW146A3 AHUW166A3 Model AHUW128A3 AHUW148A3 AHUW168A3 Do not connect cable at terminal block where plate name is To Indoor Unit Do not connect cable at terminal block where plate name is To Indoor Unit Do not connect cable at terminal block where plate...

Page 56: ... the exterior wall using saddle or its equivalent Drain hose not used Vinyl tape narrow Pipe Wrap with vinyl tape wide Taping Procedure 1 Tape the pipes connecting cable and power cable from below to above If the direction of the tape is from top to below rain drops might enter the pipes or cables 2 Secure the taped pipe along the exterior wall using saddle or it s equivalent 3 Create a trap is re...

Page 57: ...d dry nitrogen gas cylinder to this service port with charge hoses Ensure that you use a manifold valve for leakage test If it is not available use a stop valve for this purpose The Hi knob of the manifold valve must always be kept close Pressurize the system to no more than 3 0 MPa with dry nitrogen gas and close the cylinder valve when the gauge reading reached 3 0 MPa Next test for leaks with l...

Page 58: ... valve 2 Turn the valve stem of gas side valve counter clockwise to fully open the valve 3 Loosen the charge hose connected to the gas side service port slightly to release the pressure then remove the hose 4 Replace the flare nut and its bonnet on the gas side service port and fasten the flare nut securely with an adjustable wrench This process is very important to prevent leakage from the system...

Page 59: ...turn off electric power supply to avoid electric shock It is not possible to change the DIP switch settings while its is operating You must turn off power before configuring the DIP switch After setting turn on power General Information Dip Switch Setting value DIP Switch Setting ON is selected OFF is selected ON is selected in No 1 6 ON is selected in No 5 6 System Set Up Model AHUW096A3 AHUW126A...

Page 60: ... tightened 5 Water Charged water pressure After water charging the pressure gage in front of the indoor unit should indicate 2 0 2 5 bar Do not exceed 3 0 bar 6 Air purge During water charging air should be taken out through the hole of the air purge If water does not splash out when the tip at the top of the hole is pressed then air purging is not completed yet If well purged the water will splas...

Page 61: ...falls i e Leakage of the system and as a result there is not enough water flow the screen displays a warning of flow malfunction Caution flow Cleaning of the heat exchangers Cleaning of the heating system water section Residue of grease and sealants in pipes can pollute the condenser of the device up to a point where cleaning is necessary In this case the authorized person should clean the pipes w...

Page 62: ... way to determine whether the thermal protection of the electrical heater is turned off is to turn on the operation of the auxiliary source on the control unit Determine the feeling by hand the difference between the supply line and the return line The electrical heater works if the supply line is warmer Activation of the auxiliary source is explained in the manual In case the electrical heater do...

Page 63: ...e to approx 2 0 MΩ as a result of refrigerant accumulation in the internal compressor If the insulation resistance is less than 2 0 MΩ turn on the main power supply n Calculate refrigerant concentration Refrigerant concentration Total amount of replenished refrigerant in refrigerant facility kg Capacity of smallest room where indoor unit is installed m3 Limiting concentration 0 44 kg m3 R410A Limi...

Page 64: ...he work room and the other sources of noise i e the number of equipment and other adjacent processes and the length of time for which an operator exposed to the noise Also the permissible exposure level can vary from country to country This information however will enable the user of the equipment to make a better evaluation of the hazard and risk Search the Manual Using Your Mobile 1 After runnin...

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