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Refrigerant Piping Connections

Due to our policy of continuous product innovation, some specifications may change without notification.

REFRIGERANT PIPING CONNECTIONS

Outdoor Unit Connections

Single Zone Wall Mount Outdoor Unit Connections

1. Remove the tubing cover by loosening the

fastening screws. See Figure 38 or Figure

38, as appropriate for your unit.

2. Align the center of the refrigerant pipe

and corresponding connection as

shown in Figure 39.

3. Place a couple of drops of refrigerant

oil on the opening rim of the flare

before assembling.

4. Refer to Figure 40 or Figure 41 for

connecting the refrigerant pipe to the

outdoor unit.

• Ensure you do not add any contaminants.

• Tighten the flare nut initially by hand.

5. Finish tightening the flare nut with a

torque wrench until the wrench clicks.

Follow torque guidelines in Table 15.

Figure 37: 9k/12k ODU Cover Removal

Cover

Bracket for

Main Power Cables

Terminal Block

When tightening the flare nut with a torque wrench, ensure the direction

for tightening follows the arrow on the wrench.

Table 15: Torque Wrench Tightening

Outside Diame-

ter (inches)

Torque (lbs-ft)

1/4

13-18

3/8

24.6-30.4

1/2

39.8-47.7

5/8

45.6-59.3

3/4

71.6-87.5

Do not thread liquid or gas piping through bracket used to hold main

power cables.

Figure 38: 18k/24k ODU Cover Removal

Outdoor Unit

Vapor Pipe

(Larger diameter)

Liquid Pipe

(Smaller diameter)

Torque Wrench

Bracket for

Main Power

Cables

Figure 39: Refrigerant Pipe Flare Connection

Tubing

Cover

Terminal

Block Cover

Terminal Block

Figure 40: 9k/12k Refrigerant Pipe Connections

Figure 41: 18k/24k Refrigerant Pipe Connections

Torque wrench

Liquid side piping

(Smaller diameter)

Vapor side piping

(Larger diameter)

Outdoor unit

Содержание ART COOL LA180HYV1

Страница 1: ...SINGLE ZONE ART COOL PREMIER WALL MOUNTED INSTALLATION MANUAL Single Zone Art Cool Premier Wall Mount LA090HYV1 LA120HYV1 LA180HYV1 LA240HYV1 ...

Страница 2: ... development LG Electronics U S A Inc reserves the right to change specifications without notice LG Electronics U S A Inc This document as well as all reports illustrations data information and other materials are the property of LG Electronics U S A Inc PROPRIETARY DATA NOTICE This document as well as all reports illustrations data information and other materials are the property of LG Electronic...

Страница 3: ...es If the pressure switch thermal switch or other protection device is shorted and forced to operate improperly or parts other than those specified by LG are used there is risk of fire electric shock explosion and physical injury or death Replace all control box and panel covers If cover panels are not installed securely dust water and animals may enter the outdoor unit causing fire electric shock...

Страница 4: ...a low lying area or a location that is not level use a raised concrete pad or concrete blocks to provide a solid level foundation This may prevent water damage and reduce abnormal vibration Properly insulate all cold surfaces to prevent sweating Cold surfaces such as uninsulated piping can generate condensate that may drip and cause water damage to walls When installing the unit in a hospital mech...

Страница 5: ...on points causing a fire physical injury or death Do not change the settings of the protection devices If the pressure switch thermal switch or other protection devices are bypassed or forced to work improperly or parts other than those specified by LG are used there is risk of fire electric shock explosion and physical injury or death Do not supply power to the unit until all electrical wiring co...

Страница 6: ...d heating Oil steam sulfuric smoke etc can significantly reduce the performance of the unit or damage its parts Turn on the power at least six 6 hours before operation begins Starting operation immediately after turning on the main power switch can result in severe damage to the compressor s Do not turn off the main power switch after operation has been stopped Wait at least five 5 minutes before ...

Страница 7: ...igerant Piping System Layout 28 Refrigerant Piping Connections 29 Refrigerant Piping System Limitations 29 Installation Overview 30 Directional Pipe Formation 31 Drain Hose 32 Outdoor Unit Connections 33 Indoor Unit Connections 34 Indoor Unit Connections Conduit Bracket Placement 35 Bundling and Cutting Line 36 Refrigerant Piping Insulation 37 Pipe Sleeves at Penetrations 39 Leak Test Soap Method ...

Страница 8: ...e Single Zone Wall Mount Indoor and Outdoor Units LA N 090 HYV 1 Generation Indoor Outdoor Product HEV Mega HXV Mega 115V HYV Art Cool Premier HVP Art Cool Gallery HSV Art Cool Mirror High Efficiency HV Standard HLV Extended Pipe Nominal Capacity Nominal cooling capacity in Btu h 090 091 9 000 120 121 12 000 180 181 18 000 240 24 000 300 307 30 000 360 36 000 Type N Indoor Wall Mount Unit U Outdoo...

Страница 9: ...echoic chamber under ISO Standard 1996 5 All power communication cables to be minimum 18AWG 4 conductor stranded shielded or unshield ed If shielded must be grounded at Outdoor unit chassis only Must comply with applicable national code Type Art Cool Premier System Model LA090HYV1 LAN090HYV1 LAU090HYV1 LA120HYV1 LAN120HYV1 LAU120HYV1 LA180HYV1 LAN180HYV1 LAU180HYV1 LA240HYV1 LAN240HYV1 LAU240HYV1 ...

Страница 10: ...e in OD 1 4 3 8 Vapor Line in OD 3 8 5 8 Condensation Line OD ID 27 32 5 8 Additional Refrigerant Charge oz ft 0 22 0 38 Pipe Length Minimum Maximum ft 5 6 6 65 6 9 8 98 4 Piping Length no add l refrigerant ft 5 41 0 24 6 Max Elevation Difference ft 32 8 65 6 EEV Electronic Expansion Valve IDU Indoor Unit ODU Outdoor Unit Power wiring is field supplied and must comply with the applicable local and...

Страница 11: ...n A MCA A MOP A Art Cool Premier LA090HYV1 3 4 1 8 3 8 3 1 0 40 0 40 11 2 15 LA120HYV1 1 1 8 3 8 3 1 0 40 0 40 11 2 15 LA180HYV1 1 1 2 1 14 5 14 5 1 0 50 0 30 19 0 25 LA240HYV1 2 1 14 5 14 5 1 0 50 0 30 19 0 25 For component model nos Voltage tolerance is 10 Maximum allowable voltage unbalance is 2 MCA Minimum Circuit Ampacity ODU Fan Outdoor Unit Fan Motor IDU Fan Indoor Unit Fan Motor Maximum Ov...

Страница 12: ...e heat can cause the pipe to soften Because R410A is a combination of R32 and R125 the required additional refrigerant must be charged in its liquid state If the refrig erant is charged in its gaseous state its composition changes and the system will not work properly R410A Refrigerant 0 Ozone Depleting R410A refrigerant has a higher operating pressure in comparison to R22 refrigerant and therefor...

Страница 13: ... heavy snowfall or severe wind chill or cold 1 Prepare for severe winter wind chills and heavy snowfall even in areas of the country where these are unusual phenomena 2 Position the outdoor unit so that its airflow fans are not buried by direct heavy snowfall If snow piles up and blocks the airflow the system may malfunction 3 Remove any snow that has accumulated 4 inches or more on the top of the...

Страница 14: ...more than 150 of the outdoor unit s height There must be 2 to 3 1 2 inches of clearance between the outdoor unit and the windbreaker for purposes of air flow Additional anti corrosion treatment may need to be applied to the outdoor unit at oceanside locations Ocean winds may cause corrosion particularly on the condenser and evaporator fins which in turn could cause product malfunction or inefficie...

Страница 15: ...straints The strength of the Duct free Split Single Zone Inverter system frame is adequate to be used with field provided wind restraint tie downs The overall tie down configuration must be approved by a local professional engineer Always refer to local code when designing a wind restraint system Snow and Ice Conditions In climates that experience snow build up place the unit on a raised platform ...

Страница 16: ...tricted around the unit Adhere to all clearance requirements if installing the unit on a roof Be sure to level the unit and ensure that the unit is adequately anchored Consult local codes for rooftop mounting requirements Figure 4 Outdoor Unit Clearances Outdoor Unit Clearance 12 28 24 12 24 Unit inch Do not place the unit where animals and or plants will be in the path of the warm air or where wa...

Страница 17: ...d See Figure 6 for minimum ODU service access spacing Figure 6 ODU Service Access Clearance A B D G C G C D E D D B B F 19 11 16 inch 19 11 16 inch or less 19 11 16 inch 19 11 16 inch or less Case 1 Unit inch A B C D E F G Case 1 Normal 11 13 16 23 19 32 11 13 16 Minimum 3 15 16 9 27 32 3 15 16 39 3 8 Case 2 Normal 19 11 16 Minimum 13 25 32 39 3 8 Case 3 Normal 19 11 16 11 13 16 Minimum 13 25 32 3...

Страница 18: ...ing clearance when drilling into the wall Mounting Installation Plate to Wall Figure 7 Drilling Piping Hole Figure 8 Provided Installation Parts Drilling Piping Hole in the Wall Follow the left or right piping clearance recommendations as shown in Figure 9 1 Using a 2 5 8 ø 65mm inch hole core drill bit drill a hole at either the right or left side of the wall mounting Figure 10 The slant of the h...

Страница 19: ...he installation plate 5 Finish by inserting and tightening two type C screws into the bottom of the installation plate Figure 14 Pay attention to the positioning of the piping through any wall as shown in the figure as you insert the screws to the indoor unit Preparing for Piping Electrical Connection 1 To prepare indoor unit for piping disengage bottom on indoor unit from installation plate by lo...

Страница 20: ...Completely remove all burrs from pipe ends When removing burrs point the end of the copper pipe down to avoid introducing foreign materials in the pipe 2B Slide the flare nut onto the copper tube Copper tube 90 Slanted Uneven Rough Pipe Reamer Point down Flare nut Copper tube Bar Copper pipe Clamp handle Red arrow Cone Yoke Handle Bar A Slanted Inside is shiny with no scratches Smooth Even length ...

Страница 21: ...ee Table 6 for care of piping Dry Clean Airtight Principles No moisture should be inside the piping No dust should be inside the piping No leaks should occur Problems Caused Significant hydrolysis of refrigerant oil Refrigerant oil degradation Poor insulation of the compressor System does not operate properly EEVs capillary tubes are clogged Refrigerant oil degradation Poor insulation of the compr...

Страница 22: ...nic expansion valves and other heat sensitive control components from excessive heat with a wet rag or a heat barrier spray product Refrigerant Piping System Insulation All refrigerant piping field provided isolation ball valves service valves and elbows shall be completely insulated using closed cell pipe insulation The liquid and vapor lines must be insulated separately To prevent heat loss heat...

Страница 23: ...ther contaminants from entering the piping during installation Contaminants can cause mechanical failure Selecting Field Supplied Copper Tubing Copper is the only approved refrigerant pipe material for use with Duct Free System Single Zone products and LG recommends seamless phosphorous deoxidized ACR type copper pipe hard drawn rigid type K or L or annealed tempered copper pipe Drawn temper rigid...

Страница 24: ... most common method is the inclusion of expansion Loop or U bends Each segment of pipe has a natural fixed point where no movement occurs This fixed point is located at the center point of the segment assuming the entire pipe is insulated in a similar fashion The natural fixed point of the pipe segment is typically where the expansion Loop or U bend should be Linear pipe expansion can be calculate...

Страница 25: ...ength Pipe Length1 Fluid Temperature F 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120 125 130 10 0 04 0 04 0 05 0 06 0 06 0 07 0 08 0 08 0 09 0 09 0 10 0 10 0 11 0 11 0 11 0 12 0 13 0 14 0 15 0 15 20 0 08 0 08 0 10 0 12 0 13 0 14 0 15 0 16 0 17 0 18 0 19 0 20 0 21 0 22 0 22 0 23 0 26 0 28 0 29 0 30 30 0 12 0 12 0 15 0 18 0 20 0 21 0 23 0 24 0 26 0 27 0 29 0 30 0 32 0 33 0 32 0 35 0 39 ...

Страница 26: ...the outdoor unit and the indoor unit Duct free Single Zone systems are provided with redundant systems that assure oil is properly returned to the compressor Sight glasses and solenoid valves may cause vapor to form in the liquid stream Over time dryers may deteriorate and introduce debris into the system The designer and installer should verify the refrigerant piping system is free of traps saggi...

Страница 27: ...ed to meet local codes If allowed by code use fiber straps or split ring hangers suspended from the ceiling on all thread rods fiber straps or split ring hangers can be used as long as they do not compress the pipe insulation Place a second layer of insulation over the pipe insulation jacket to prevent chafing and compression of the primary insulation within the confines of the support pipe clamp ...

Страница 28: ...t protective sleeve to prevent insulation deterioration and water infiltration Refrigerant pipe installed inside underground casing must be continuous without any joints Underground refrigerant pipe must be located at a level below the frost line Figure 27 Typical Arrangement of Refrigerant Pipe and Cable s in a Utility Conduit Table 12 Utility Conduit Sizes 1 OD pipe diameter in inches Values in ...

Страница 29: ... piping Table 14 Art Cool Premier Refrigerant Piping System Limitations Figure 28 Example System Layout with LA120HYV1 Refrigerant Piping System Limitations Pipe Length ELF Equivalent Length of pipe in Feet Longest total equivalent piping length LA090HYV1 LA120HYV1 LA180HYV1 LA240HYV1 65 6 feet 98 4 feet Shortest total equivalent piping length 6 6 feet 9 8 feet Distance between fittings and indoor...

Страница 30: ...tdoors Installation Duct Free Single Zone Wall Mounts are a one to one sys tem There is a direct piping connection between the outdoor unit and the indoor unit Figure 29 Illustrates the basic pipe connections between the outdoor and indoor unit Refer back to this illustration as you proceed with pipe connections This illustration shows the indoor unit being installed at a higher position than the ...

Страница 31: ...able from down to up 3 Secure the taped piping along the exterior wall using pipe clamps 4 Create trap above the electrical connections cover to prevent water penetrating electrical components and wiring Indoor Unit Installed Below Outdoor Unit 1 Refer to Figure 34 while following the procedures below 2 Tape the piping drain hose and connection cable from down to up 3 Secure the taped piping along...

Страница 32: ...rain hose is routed from the indoor unit through the structure wall to the outdoor It should slope at an angle where it is high er at the indoor unit and lower toward the outdoor area thereby letting gravity push any condensation down and out See Figure 35 for proper drainage slope Avoid piping the drain hose as shown in Figure 36 These methods are incorrect and can cause leakage at the indoor uni...

Страница 33: ...e nut initially by hand 5 Finish tightening the flare nut with a torque wrench until the wrench clicks Follow torque guidelines in Table 15 Figure 37 9k 12k ODU Cover Removal Cover Bracket for Main Power Cables Terminal Block When tightening the flare nut with a torque wrench ensure the direction for tightening follows the arrow on the wrench Table 15 Torque Wrench Tightening Outside Diame ter inc...

Страница 34: ...to scratch the main horizontal vane 4 From the rear of the indoor unit carefully bend the copper pipe tubing holder away from the unit to expose for conduit bracket installation area 5 Remove the pipe port cover 6 If conduit bracket has not been installed yet follow Conduit Bracket Placement section instructions on next page before going to next step 7 Position the bundled tubing by bending slowly...

Страница 35: ...ions within the elbow L type conduit Figure 45 to be held in place at the back of the unit 2 Set the conduit wiring by using the bracket and D screws from the accessory kit This must be done prior to permanent place ment of the piping to the rear of the unit otherwise you won t be able to reach the conduit once piping and drain hose are in place and anchored See Figure 44 for a detailed view of th...

Страница 36: ...tting line is placed upward Figure 47 3 Verify that rear piping house section is wrapped with vinyl tape Use a narrow type of vinyl tape for this step 4 Continue to wrap the Indoor unit pipe as connected to the outdoor connection pipe as shown in Figure 48 Figure 46 Piping with Insulation Material Figure 47 Correct Cutting Line Placement Figure 48 Wrapping Connection Pipe to Indoor Unit s Pipe Fig...

Страница 37: ... pipe with no air space between it and the pipe Insulation passing through pipe hangers inside conduit and or sleeves must not be compressed Protect insulation inside hangers and supports with a second layer All pipe insulation exposed to direct sunlight and deterioration produc ing elements must be properly protected with a PVC aluminum vapor barrier jacket or alternatively placed in a weather re...

Страница 38: ...or a dormitory or school etc Minimum Refrigerant Pipe Ethylene Propylene Diene Methylene EPDM Insulation Wall Thickness Requirements 4 Special location Non Air conditioned location If conditions 1 and 2 below are present 1 When the piping passes through an indoor area where the indoor unit does not operate 2 When the humidity is high and there is no air flow in the location where the piping is ins...

Страница 39: ...resistant caulk Fire resistant insulation When filling an access hole with mortar cover the area with steel plate so that the insulation will not fall through For this area use fire resistant materials for both the insulation and cover Do not use vinyl cover Pipe Sleeves at Penetrations LG requires that all pipe penetrations through walls floors and pipes buried underground be properly insulated a...

Страница 40: ...inder valve when the gauge reading reaches 550 P S I G Lo Hi Outdoor Unit Manifold Valve Charge Hose Nitrogen Gas Tank Upright Position Pressure Gauge Indoor Unit Piping Bundle Leak Test Using Nitrogen Tank To avoid nitrogen entering the refrigerant system in a liquid state the top of the cylinder must be higher than its bottom when you pressurize the system Be sure a cylinder is used in a vertica...

Страница 41: ...re 55 on previous page for proper hookup Evacuation of Lines Finishing Up Procedure 1 Confirm that the Lo knob of the manifold valve is open Refer back to Figure 55 2 Confirm that the Hi knob of the manifold valve is left closed 3 Run the Vacuum pump Operate pump until system is evacuated down to 300 microns Run pump an additional 15 minutes after reaching micron level The duration of the operatio...

Страница 42: ...ler needs two AAA 1 5V batteries non re chargeable for operation Remove the battery cover from the back of the wireless controller Figure 56 Push downward on the tab at the top of the battery cover and then lift up to remove 2 Insert the two new batteries Align batteries by the and sides The interior battery compartment of the wireless controller will have clear markings for the and placement 3 Ve...

Страница 43: ...ted into the outdoor unit Enabling Cooling Only Mode Before performing the Pump Down procedure the system must be in Installer Mode and then must be placed into Cooling Only Mode 1 Turn off the IDU by pointing the IDU wireless controller at the IDU infrared receiver and press the OFF button on the wireless controller 2 Simultaneously press the recessed Reset button small hole and the JET MODE butt...

Страница 44: ...d connecting the power wiring Properly ground the outdoor and indoor unit Improperly grounded wire can cause communication problems from electrical noise and motor current leakage Ground wiring must always be installed by a trained technician If the system operates in reversed phase it may damage the com pressor and other components If there is a possibility of reversed phase phase loss momen tary...

Страница 45: ... and Communications Cable Diagram Copper Wire Terminate multiple power wires of the same gauge to both sides Do not terminate two wires on one side Do not terminate different gauge wires to a terminal block Ring Terminal Power Wiring Connecting the Power Wiring Guidelines Best practice dictates using ring or spade terminals to terminate power wiring at the power terminal block Figure 58 If ring te...

Страница 46: ...le length 984 feet Firmly attach the cable provide slack but secure in a way to pre vent external forces from being imparted on the terminal block Wiring should be completed without splices Terminate the cable shield to a grounded surface at the outdoor unit only Always verify the communication cable is connected to a communications terminal on the Single Zone unit Never apply line voltage power t...

Страница 47: ...el LA090HYV1 LA120HYV1 AKB73835320 LA180HYV1 LA240HYV1 AKB74835304 Controllers Controllers Refer to Table 18 as to which wireless controller models to use for each Single Zone model Once all wiring is connected to the indoor and outdoor units be sure to test the accompanying wireless controllers for performance As always follow all safety warnings and notes when operating the Single Zone units usi...

Страница 48: ...wever your indoor unit model may differ 2 Using a phillips head screwdriver remove the screws from the bottom panel of the indoor unit and set aside Figure 61 3 Remove the bottom panel Figure 62 Removal is necessary to gain access to the terminal block which is situated at the bottom of most indoor units Note that the electrical communications wiring is usually routed through the back bottom of th...

Страница 49: ... panel using the rear tabs You might need to give the panel a gentle tap with the palm of your hand to be sure it engages at the bottom 6 Using a phillips screwdriver reattach the screws to the bottom panel and secure 7 Once screws are in place re snap the latches over the screws Refer back to Figure 60 as an example 8 If all other piping and electrical wiring to the outside unit has been complete...

Страница 50: ...e Figure 66 Circuit Breaker WARNING Be sure there is no power going through the Single Zone system be fore connecting wiring as it may result in electric shock physical injury or death Familiarize yourself with the location of the circuit breaker and be sure that all power is removed from the Single Zone unit as it may result in electric shock physical injury or death 1 Using a phillips head screw...

Страница 51: ... of LG Corp ELECTRICAL WIRING Figure 69 9k 12k ODU to IDU Wiring Figure 70 18k 24k ODU to IDU Wiring LA090HYV1 LA120HYV1 LA180HYV1 LA240HYV1 POWER SUPPLY Single Phase 208 230 VAC Note Install a field supplied disconnect switch Refer to local code OUTDOOR UNIT INDOOR UNIT TERMINAL 3P TERMINAL 8P OUTDOOR UNIT INDOOR UNIT TERMINAL 3P TERMINAL 5P POWER SUPPLY Single Phase 208 230 VAC Disconnect Switch...

Страница 52: ...r discharge temperature Front outdoor coil pipe temperature Back outdoor coil pipe temperature Liquid line pipe temperature Subcooler inlet temperature Subcooler outlet temperature Average indoor unit IDU pipe temperature Inverter compressor operation indicator light Liquid injection valves operation indicator lights Hot gas bypass valve operation indicator light Four way reversing valve operation...

Страница 53: ...a USB to RS 485 connector kit When connected through IDU user will not be able to record data This software can be used to both commission new systems and troubleshoot existing systems LGMV data can be recorded to a CSV file and emailed to an LG representative to assist with diagnostic evaluations Recommended Minimum PC Configuration Error Codes LGMV software helps the service technician or commis...

Страница 54: ... be used with Single Zone one to one configurations such as the Single Zone Wall Mount systems The Duct Free System air conditioning system must run for at least 15 20 minutes before data collected by SIMs 2 0 is valid for troubleshooting You must have the free SIMs app correctly in stalled on your smart phone before using SIMs Some ODUs have an LGMV extension cable ac cessed by removing the side ...

Страница 55: ...tart Timer Comp Mode EEV Indoor Info Tab Displays the following information Frequency Operation THM Mode REM Mode FAN EEV Air Temp Pipe in Pipe mid Pipe out Graph Info Tab This tab has three sub sections IDU Indoor Unit Temperature graph Displays IDU informa tion in graph format In formation displayed is for the IDU selected on the Main screen ODU Outdoor Unit Temperature and Fre quency graph Disp...

Страница 56: ...t 2x blink LED2 Red light 1x blink Error Code Nomenclature Definitions MICOM Non volatile memory chip where unit setup information is stored EPROM Non volatile memory chip where device identification size and factory defined default component operating parameters are stored Error Code Description 1 Indoor unit room temperature sensor error 2 Indoor unit inlet pipe sensor error 4 Float switch error...

Страница 57: ...s Table 20 Single Zone Wall Mounted Outdoor Unit Error Codes Error Code Description No of Times Outdoor Unit LEDs Blink LED1 Plasma LED LED2 Power LED 21 DC Peak IPM Fault Compressor DC voltage was too high 2X 1X 22 Current Transformer2 CT2 error Alternating current AC input too high 2X 2X 23 DC Link Low Volt 2X 3X 25 AC Low High Volt 2X 5X 26 DC Comp Position Error not providing rotation Locking ...

Страница 58: ...or a full description of all error codes and workarounds Error Code Description No of Times Outdoor Unit LEDs Blink LED1 Plasma LED LED2 Power LED 61 Outdoor unit condenser coil temperature is too high 6X 1X 62 Outdoor unit inverter compressor PCB heat sink temperature is too high 6X 2X 63 Condenser coil pipe thermistor temperature is too low 6X 3X 65 Heat sink thermistor has disconnected or has s...

Страница 59: ...o can cause health hazards and bodily injury to occupants of the space 1 American Society of Heating Refrigeration and Air Conditioning Engi neers Inc ASHRAE Atlanta GA ASHRAE Inc Information about ASHRAE Standard 15 2010 34 2010 and addenda current as of the date of this publication Take appropriate actions at the end of HVAC equipment life to recover recycle reclaim or destroy R410A refrigerant ...

Страница 60: ...and hangers Brazing Practices Description Check Medical grade there are 4 available dry nitrogen for purging during brazing was used constant 3 psi while brazing Installation For more information on any procedure refer to the detail provided in the Indoor Unit Installation Manuals Refrigerant Piping Description Check All pipe materials were properly stored capped and clean All burrs were removed a...

Страница 61: ...ll local electrical code requirements Power wiring to the indoor unit was installed per all local electrical code requirements LG supplied cable was used between the indoor unit and its zone controller No cables were spliced and no wire caps are present Communication type RS 485 BUS type All communications cables were a minimum of 18 AWG four 4 conductor shielded and stranded with insulation mater...

Страница 62: ...ll Road Alpharetta Georgia 30009 www lghvac com IM_SZ_ArtCoolPremier_HYV1_4_16 Supersedes IM_SZ_ArtCoolPremier_HYV1_6_15 LG Customer Information Center Commercial Products 1 888 865 3026 USA Follow the prompts for commercial A C products 20001747 ISO 9001 2008 LG ELECTRONICS INC ...

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