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81

Refrigerant Piping System Installation for Heat Pump Operation

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

©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

Downstream IDU total capacity

(Btu/h)

Liquid pipe (inches OD)

Vapor pipe (inches OD)

Low pressure

High pressure

≤19,100

1/4Ø

1/2Ø

3/8Ø

<54,600

3/8Ø

5/8Ø

1/2Ø

<76,400

3/8Ø

3/4Ø

5/8Ø

<114,700

3/8Ø

7/8Ø

3/4Ø

<172,000

1/2Ø

1-1/8Ø

7/8Ø

<229,400

5/8Ø

1-1/8Ø

7/8Ø

<248.500

5/8Ø

1-3/8Ø

1-1/8Ø

<344,000

3/4Ø

1-3/8Ø

1-1/8Ø

<592,500

3/4Ø

1-5/8Ø

1-3/8Ø

Table 39: Refrigerant Pipe (B) Diameters between Y-branches and Y-branches / Heat Recovery Unit / Headers.

Table 40: Indoor Unit Connecting Pipe from Branch (C).

Indoor Unit Capacity

1

Liquid pipe (inches OD)

Vapor pipe (inches OD)

≤19,100

1/4Ø

1/2Ø

≤54,600

3/8Ø

5/8Ø

≤76,400

3/8Ø

3/4Ø

≤95,900

3/8Ø

7/8Ø

1

9,600-24,200 Btu/h 4-way 3 feet x 3 feet Cassette and 15,400-24,200 Btu/h High Static Ducted IDUs have 3/8Ø (liquid) and 5/8Ø (vapor).

Conditional Applications

Conditional applications are computed in LATS. See below for an explanation of when pipes are upsized.

If the equivalent length between the first Y-branch to the farthest indoor unit is >131 feet (maximum 295 feet):
• Pipe segment diameters between the first branch and the last branch must be sized up by one. This applies to both liquid and low / high

vapor pipes. If the next size up is not available, or if the pipe segment diameters are the same as main pipe (A) diameters, sizing up is not

possible.

• While calculating total refrigerant piping length, pipe (B) segment lengths between the first Y-branch and second Y-branch, and between the

second Y-branch and the heat recovery unit must be calculated by two.

•

Length of pipe (C) from each indoor unit to the closest Y-branch, header, or heat recovery unit ≤49 feet.

•

[Length of pipe from outdoor unit to farthest indoor unit (A+B+C)] - [Length of pipe from outdoor unit to closest indoor unit (A+B+C)] ≤131

feet.

Sample Layouts

INSTALLING FOR HEAT RECOVERY

OPERATION

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Summary of Contents for ARUM072BTE5

Page 1: ...INSTALLATION MANUAL Variable Refrigerant Flow Outdoor Units 6 0 to 42 0 Tons ...

Page 2: ...reference Content familiarity is required for proper installation The instructions included in this manual must be followed to prevent product malfunction property damage injury or death to the user or other people Incorrect operation due to ignoring any instructions will cause harm or damage The level of seriousness is classified by the symbols described by the summary list of safety precautions ...

Page 3: ...tion 54 67 Indoor Unit Y Branch Kits 54 55 Outdoor Unit Y Branch Kits 56 57 Header Kits 58 59 Sample Layouts 60 63 Piping Connections Pipe Routes 64 Knock Outs 65 Removing the Leak Prevention Caps 66 Service Ports 67 Installing for Heat Recovery Operation 68 89 Indoor Unit Y Branch Kits 68 69 Outdoor Unit Y Branch Kits 70 71 Header Kits 72 73 Heat Recovery Units 74 79 Sample Layouts 80 85 Piping C...

Page 4: ...th Replace all control box and panel covers If cover panels are not securely installed dust water and animals may enter the outdoor unit causing fire electric shock and physical injury or death Always check for system refrigerant leaks after the unit has been installed or serviced Exposure to high concentration levels of refrigerant gas may lead to illness or death Periodically check that the outd...

Page 5: ...used or air mixes with original refrigerant the unit will malfunction and damage will occur Do not store or use flammable gas combustibles near the unit There is a risk of product failure Do not use the product for mission critical or special pur pose applications such as preserving foods works of art or other precision air conditioning applications The equipment is designed to provide comfort coo...

Page 6: ...ppropriate wire strain relief Improperly securing wires will create undue stress on equipment power connections Inadequate connections may generate heat cause a fire and physical injury or death Ensure the system is connected to a dedicated power source that provides adequate power If the power source capacity is inadequate or the electric work is not performed properly it may result in fire elect...

Page 7: ...se caution when cleaning or servicing the air conditioner There is risk of electric shock physical injury or death Clean up the site after servicing is finished and check that no metal scraps screws or bits of wiring have been left inside or surrounding the unit Do not use the product for mission critical or special pur pose applications such as preserving food works of art or other precision air ...

Page 8: ...cooling capacity in Btu h Type M Combination Heat Pump or Heat Recovery Family ARU Multi V Outdoor Unit Refrigerant R410A Heat Recovery Units HRU PRHR 02 2A Series Number 2A Series Number Number of Ports 02 Two Ports 03 Three Ports 04 Four Ports Family PRHR Multi V Heat Recovery HR unit Refrigerant R410A 072 72 000 096 96 000 121 121 000 144 144 000 168 168 000 192 192 000 216 216 000 241 240 000 ...

Page 9: ...and Black Coated Fin Hydrophilic Rows Fins per inch 2 17 2 17 2 17 3 17 Piping for Heat Recovery Operation7 Liquid Line Connection in OD 3 8 Braze 3 8 Braze 1 2 Braze 1 2 Braze Low Pressure Vapor Line Connection in OD 3 4 Braze 7 8 Braze 1 1 8 Braze 1 1 8 Braze High Pressure Vapor Line Connection in OD 5 8 Braze 3 4 Braze 3 4 Braze 7 8 Braze Piping for Heat Pump Operation7 Liquid Line Connection i...

Page 10: ...Tube Aluminum Fin and Black Coated Fin Hydrophilic Rows Fins per inch 3 17 3 17 3 17 3 17 Piping for Heat Recovery Operation7 Liquid Line Connection in OD 5 8 Braze 5 8 Braze 5 8 Braze 5 8 Braze Low Pressure Vapor Line Connection in OD 1 1 8 Braze 1 1 8 Braze 1 1 8 Braze 1 3 8 Braze High Pressure Vapor Line Connection in OD 7 8 Braze 1 1 8 Braze 1 1 8 Braze 1 1 8 Braze Piping for Heat Pump Operati...

Page 11: ...d Fin Coating Copper Tube Aluminum Fin and Black Coated Fin Hydrophilic Rows Fins per inch 2 17 3 17 2 17 3 17 2 17 3 17 2 17 3 17 Piping for Heat Recovery Operation7 Liquid Line Connection in OD 3 8 5 8 Braze 3 8 5 8 Braze 3 8 5 8 Braze 1 2 5 8 Braze Low Pressure Vapor Line Connection in OD 7 8 1 1 8 Braze 7 8 1 1 8 Braze 7 8 1 1 8 Braze 1 1 8 1 1 8 Braze High Pressure Vapor Line Connection in OD...

Page 12: ...ilic Rows Fins per inch 3 17 x 2 3 17 x 2 3 17 x 2 Piping for Heat Recovery Operation7 Liquid Line Connection in OD 1 2 5 8 Braze 5 8 5 8 Braze 5 8 5 8 Braze Low Pressure Vapor Line Connection in OD 1 1 8 1 1 8 Braze 1 1 8 1 1 8 Braze 1 1 8 1 1 8 Braze High Pressure Vapor Line Connection in OD 7 8 1 1 8 Braze 7 8 1 1 8 Braze 1 1 8 1 1 8 Braze Piping for Heat Pump Operation7 Liquid Line Connection ...

Page 13: ...terial and Fin Coating Copper Tube Aluminum Fin and Black Coated Fin Hydrophilic Rows Fins per inch 2 17 x 2 3 17 2 17 x 2 3 17 2 17 3 17 x 2 2 17 3 17 x 2 Piping for Heat Recovery Operation7 Liquid Line Connection in OD 1 2 1 2 5 8 Braze 1 2 1 2 5 8 Braze 1 2 1 2 5 8 Braze 1 2 5 8 5 8 Braze Low Pressure Vapor Line Conn in OD 1 1 8 1 1 8 1 1 8Braze 1 1 8 1 1 8 1 1 8Braze 1 1 8 1 1 8 1 1 8Braze 1 1...

Page 14: ...uminum Fin and Black Coated Fin Hydrophilic Rows Fins per inch 2 17 2 17 2 17 3 17 Piping for Heat Recovery Operation7 Liquid Line Connection in OD 3 8 Braze 3 8 Braze 1 2 Braze 1 2 Braze Low Pressure Vapor Line Connection in OD 3 4 Braze 7 8 Braze 1 1 8 Braze 1 1 8 Braze High Pressure Vapor Line Connection in OD 5 8 Braze 3 4 Braze 3 4 Braze 7 8 Braze Piping for Heat Pump Operation7 Liquid Line C...

Page 15: ...nd Black Coated Fin Hydrophilic Rows Fins per inch 3 17 3 17 3 17 3 17 Piping for Heat Recovery Operation7 Liquid Line Connection in OD 5 8 Braze 5 8 Braze 5 8 Braze 5 8 Braze Low Pressure Vapor Line Connection in OD 1 1 8 Braze 1 1 8 Braze 1 1 8 Braze 1 3 8 Braze High Pressure Vapor Line Connection in OD 7 8 Braze 1 1 8 Braze 1 1 8 Braze 1 1 8 Braze Piping for Heat Pump Operation7 Liquid Line Con...

Page 16: ...anger Material and Fin Coating Copper Tube Aluminum Fin and Black Coated Fin Hydrophilic Rows Fins per inch 2 17 3 17 2 17 3 17 2 17 3 17 2 17 3 17 Piping for Heat Recovery Operation7 Liquid Line Connection in OD 3 8 5 8 Braze 3 8 5 8 Braze 3 8 5 8 Braze 1 2 5 8 Braze Low Pressure Vapor Line Connection in OD 7 8 1 1 8 Braze 7 8 1 1 8 Braze 7 8 1 1 8 Braze 1 1 8 1 1 8 Braze High Pressure Vapor Line...

Page 17: ...inch 3 17 x 2 3 17 x 2 3 17 x 2 Piping for Heat Recovery Operation7 Liquid Line Connection in OD 1 2 5 8 Braze 5 8 5 8 Braze 5 8 5 8 Braze Low Pressure Vapor Line Connection in OD 1 1 8 1 1 8 Braze 1 1 8 1 1 8 Braze 1 1 8 1 1 8 Braze High Pressure Vapor Line Connection in OD 7 8 1 1 8 Braze 7 8 1 1 8 Braze 1 1 8 1 1 8 Braze Piping for Heat Pump Operation7 Liquid Line Connection in OD 1 2 5 8 Braze...

Page 18: ...Exchanger Material and Fin Coating Copper Tube Aluminum Fin and Black Coated Fin Hydrophilic Rows Fins per inch 2 17 x 2 3 17 2 17 x 2 3 17 2 17 3 17 x 2 2 17 3 17 x 2 Piping for Heat Recovery Operation7 Liquid Line Connection in OD 1 2 1 2 5 8 Braze 1 2 1 2 5 8 Braze 1 2 1 2 5 8 Braze 1 2 5 8 5 8 Braze Low Pressure Vapor Line Conn in OD 1 1 8 1 1 8 1 1 8Braze 1 1 8 1 1 8 1 1 8Braze 1 1 8 1 1 8 1 ...

Page 19: ...1 5 0 22 6 35 35 8 0 ARUM096BTE5 1 16 4 2 8 0 28 5 40 40 10 0 ARUM121BTE5 1 18 3 2 8 0 30 9 40 40 12 0 ARUM144BTE5 2 19 8 18 3 2 8 0 51 1 70 70 14 0 ARUM168BTE5 2 21 2 19 1 2 8 0 53 6 70 70 16 0 ARUM192BTE5 2 23 3 20 8 2 8 0 57 9 80 80 18 0 ARUM216BTE5 2 24 3 21 9 2 8 0 60 3 80 80 20 0 ARUM241BTE5 2 25 6 23 2 2 8 0 63 2 80 80 22 0 ARUM264BTE5 3 21 2 19 1 16 4 4 8 0 8 0 53 6 28 5 70 40 70 40 24 0 A...

Page 20: ...RUM072DTE5 1 7 8 1 3 0 12 8 20 20 8 0 ARUM096DTE5 1 9 1 2 5 0 16 4 25 25 10 0 ARUM121DTE5 1 10 7 2 5 0 18 4 25 25 12 0 ARUM144DTE5 2 10 3 8 5 2 5 0 26 4 35 35 14 0 ARUM168DTE5 2 11 4 9 2 2 5 0 28 5 35 35 16 0 ARUM192DTE5 2 14 8 12 2 2 5 0 35 7 50 50 18 0 ARUM216DTE5 2 15 5 13 9 2 5 0 38 3 50 50 20 0 ARUM241DTE5 2 16 9 15 3 2 5 0 41 4 50 50 22 0 ARUM264DTE5 3 11 4 9 2 9 1 4 5 0 5 0 28 5 16 4 35 25 ...

Page 21: ...Galvanized steel plate Connecting Pipes To Indoor Units Liquid Pipe inches 3 8 Vapor Pipe inches 5 8 To Outdoor Units Liquid inches 3 8 1 2 5 8 Low pressure Vapor inches 7 8 1 1 8 1 1 8 High pressure Vapor inches 3 4 7 8 7 8 Insulation Material Polyethylene Current Minimum Circuit Amps MCA 0 1 0 15 0 2 Maximum Fuse Amps MFA 15 Power Supply 1Ø 208 230V 60Hz Heat recovery units can only be used with...

Page 22: ...MENSIONS ARUM072BTE5 DTE5 7 8 Diameter Leak Test Hole L9 L10 L9 6 1 2 5 9 16 L10 L11 L12 L13 L14 L15 L11 L12 8 5 8 6 7 16 L13 24 5 8 L14 L15 26 7 16 29 3 16 Two 2 7 8 Diameter Wire Routing Holes Bottom Piping Routing Holes Bottom two ø2 5 8 ø2 1 8 Power Cord Routing Hole Bottom two 2 ø2 M5 M6 M7 M8 M9 M10 M11 M12 M13 M14 M15 M5 M8 M7 M6 M9 M10 M11 M12 M13 M14 M15 13 1 8 12 5 16 11 3 4 9 11 16 9 5 ...

Page 23: ...3 16 4 5 16 3 L9 L10 7 8 Diameter Leak Test Hole Left Side View L9 L10 L11 L12 L13 L14 6 1 2 5 9 16 L11 L12 8 5 8 6 7 16 9 15 16 L13 L14 3 5 8 Right Side View Two 2 7 8 Diameter Wire Routing Holes Bottom M5 M6 M7 M8 M9 M10 M11 M12 M13 M15 M14 M16 Power Cord Routing Hole Bottom two 2 ø2 Holes Bottom two ø2 5 8 ø2 1 8 M16 3 5 8 Piping Routing Center of Gravity 19 32 Dameter Hole Bottom Mounting Hole...

Page 24: ... L9 L10 7 8 Diameter Leak Test Hole Left Side View L9 L10 L11 L12 L13 L14 6 1 2 5 9 16 L11 L12 8 5 8 6 7 16 9 15 16 L13 L14 3 5 8 Right Side View Two 2 7 8 Diameter Wire Routing Holes Bottom M5 M6 M7 M8 M9 M10 M11 M12 M13 M15 M14 M16 Power Cord Routing Hole Bottom two 2 ø2 Holes Bottom two ø2 5 8 ø2 1 8 M16 3 5 8 Piping Routing Center of Gravity 19 32 Dameter Hole Airflow Airflow Top View Bottom M...

Page 25: ...Side View L9 L10 L11 L12 L13 L14 6 1 2 5 9 16 L11 L12 8 5 8 6 7 16 9 15 16 L13 L14 3 5 8 Right Side View Two 2 7 8 Diameter Wire Routing Holes Bottom M5 M6 M7 M8 M9 M10 M11 M12 M13 M15 M14 M16 Power Cord Routing Hole Bottom two 2 ø2 Holes Bottom two ø2 5 8 ø2 1 8 M16 3 5 8 Piping Routing Center of Gravity 19 32 Dameter Hole Airflow Airflow Top View Bottom Mounting Holes Airflow D W Airflow 1 min 1...

Page 26: ... Due to our policy of continuous product innovation some specifications may change without notification LG Electronics U S A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp HEAT RECOVERY UNIT DIMENSIONS PRHR022A ...

Page 27: ...icy of continuous product innovation some specifications may change without notification LG Electronics U S A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp PRHR032A HEAT RECOVERY UNIT DIMENSIONS ...

Page 28: ... Due to our policy of continuous product innovation some specifications may change without notification LG Electronics U S A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp PRHR042A HEAT RECOVERY UNIT DIMENSIONS ...

Page 29: ...hrow away plastic packaging bags so that children may not play with them and risk suffocation and death Consider the unit s center of gravity is before lifting Hoist the unit with the center of gravity centered among the lifting straps There is a risk of the product falling and causing physical injury Lift the outdoor unit from the base at specified locations Support the outdoor unit at a minimum ...

Page 30: ... properly out of the unit when it is in heating mode Avoid placing the outdoor unit in a low lying area where water could accumulate If the outdoor unit is installed in a highly humid environment near an ocean lake etc ensure that the site is well ventilated and has a lot of natural light Example Install on a rooftop Don ts Where it will be subjected to direct thermal radiation from other heat sou...

Page 31: ...tinued Tie Downs and Wind Restraints The strength of Multi V frames 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 Ocean winds Ocean winds Ocean winds Windbreaker Additional anti corrosion treatment may need to be applied to the...

Page 32: ...2 C 2 A 1 B 12 C 1 D 20 A 2 B 4 C 2 D 20 A 1 B 12 C 1 D 20 E 1 A 2 B 4 C 2 D 20 E 4 A 1 B 20 C 1 D 20 E 1 F 36 Unit s is are Enclosed by Four 4 Walls A 2 B 4 C 2 D 20 E 4 F 20 A 1 B 12 C 1 D 12 E 1 F 20 A 2 B 4 C 2 D 4 E 4 F 20 A 1 B 20 C 1 D 20 F 36 A 2 B 20 C 2 D 20 F 24 A 1 B 20 C 1 D 20 E 1 F 48 A 1 B 20 C 1 D 20 E 1 F 71 A 2 B 20 C 2 D 20 E 4 F 36 A 2 B 20 C 2 D 20 E 4 F 48 A 1 B 12 A 8 B 12 ...

Page 33: ...oided if mechanical equipment is placed on the membrane On retrofit projects a former chiller boiler air handler equipment room mechanical area or penthouse already exists Where a project has vertical self contained VAV air handlers on each floor in lieu of a centralized mechanical room To curtail the potential need for redundant zone heating devices such as wall fin radiators or duct heaters In e...

Page 34: ... strategically locate the inlet ventilation opening s upwind of the outlet opening s Discharge and supply ductwork should be designed to avoid weather related long periods of water entrainment and the potential for micro bial growth Provide a means to drain the condensate generated during heating mode and defrost cycle in addition to rainwater that infiltrates the inlet louver enclosed area Instal...

Page 35: ...section Installing and Setting Outdoor Units in Dual Triple Frame Systems 1 2 7 6 5 4 3 1 2 7 6 5 4 3 ON OFF 1 2 7 6 5 4 3 1 2 7 6 5 4 3 ON OFF 1 2 7 6 5 4 3 1 2 7 6 5 4 3 ON OFF Master Outdoor Unit Slave1 Outdoor Unit Slave2 Outdoor Unit A B C Master Outdoor Unit to Slave1 Outdoor Unit Connection Piping First Y Branch Master A B Slave 1 C Slave 2 Piping to Indoor Units Heat Recovery Units Slave1 ...

Page 36: ...ectric noise could occur Condensate drain piping is not required 1 Locate the inspection door at the control box side of the heat recovery unit 2 If reducers are used space for service access must be increased to match the dimensions of the reducer 5 4 6 17 7 8 6 7 8 6 7 8 8 5 8 7 3 16 16 1 2 2 7 16 5 7 16 4 7 8 5 1 16 1 3 16 2 3 8 Inspection door servicing space 18 15 16 13 5 8 1 2 3 7 17 3 4 17 ...

Page 37: ...vation difference between heat recovery units connected in series is permitted but should not exceed 16 feet 4 Each port on the heat recovery unit has a capacity up to 54 000 Btu h 5 Each port can be connected to a maximum of eight 8 indoor units When multiple indoor units are connected to one port all indoor units on that port must operate in the same mode cooling or heating 6 If an indoor unit l...

Page 38: ... between the units the condensate drain connection and the floor drain Avoid placing the unit s in a low lying area where water may accumulate Do not install the condensate drain piping within the outdoor unit frame use the access hole for drainage instead Drain piping installed within the outdoor unit frame may freeze the condensate may not drain properly and cause damage the outdoor unit Refer t...

Page 39: ...otherwise directed by the structural engineer or local codes use 7 8 inch or 1 2 inch diameter J bolts inserted at least 3 inches deep into the supports Use a hexagon nut with a lock washer Location of the Anchor Bolts on the Outdoor Unit Job site conditions may require routing utilities including the refrigerant piping condensate pipe and electrical wiring under the unit base If job site conditio...

Page 40: ...n nuts field supplied the metal hanger tabs and flat washers field supplied onto the hanging bolts as shown in the diagram 3 After verifying that the heat recovery unit is level tighten the hexagon nuts The heat recovery unit should be positioned no more than 5 from level front to back and left to right Removing the factory process stubs is recommended Replace with refrigerant grade caps Insulate ...

Page 41: ...se end of 2016 integrates the LG LATS program with Revit software It permits engineers to layout and validate Multi V VRF systems directly into Revit drawings AutoCAD and Revit are both registered marks of Autodesk Inc Features All LG product design criteria have been loaded into the program making LATS simple to use double click or drag and drop the component choices Build systems in Tree Mode wh...

Page 42: ...ilt straight lines and elbows This Mark Up drawing should be returned to the design engineer or Rep who should input contractor changes into the LATS file Copy the original LATS software file save and rename as a separate file and modify all piping lengths by double clicking on each length and editing information Like the shop drawing the Auto Piping and System Check should also be run on this new...

Page 43: ...UM144DTE5 24 ARUM168BTE5 ARUM168DTE5 29 ARUM192BTE5 ARUM192DTE5 32 ARUM216BTE5 ARUM216DTE5 35 ARUM241BTE5 ARUM241DTE5 39 ARUM264BTE5 ARUM264DTE5 42 ARUM288BTE5 ARUM288DTE5 45 ARUM312BTE5 ARUM312DTE5 52 ARUM336BTE5 ARUM336DTE5 55 ARUM360BTE5 ARUM360DTE5 58 ARUM384BTE5 ARUM384DTE5 61 ARUM408BTE5 ARUM408DTE5 64 ARUM432BTE5 ARUM432DTE5 64 ARUM456BTE5 ARUM456DTE5 64 ARUM480BTE5 ARUM480DTE5 64 ARUM504BT...

Page 44: ...ts connecting a Dedicated Outdoor Air System DOAS product and an outdoor unit Always properly support the piping as per the instructions on page 50 SELECTING COPPER PIPING Table 20 ACR Rated Copper Tubing Material Nominal Pipe Outside Diameter in Actual Outside Diameter in Drawn Temper Annealed Temper Nominal Wall Thickness in Weight lb ft Cubic ft per Linear ft Nominal Wall Thickness in Weight lb...

Page 45: ...mula 1 From the table Linear Thermal Expansion of Copper Piping in Inches find the row corresponding with the actual length of the straight pipe segment 2 Estimate the minimum and maximum temperature of the pipe Typical pipe temperature change ranges High Pressure Vapor ambient temperature to 215 F Low Pressure Vapor ambient to 35 F Liquid pipe ambient 80 F 110 F Choose the two most extreme In the...

Page 46: ... 1 92 2 04 2 16 2 28 2 40 2 52 2 64 2 59 2 76 3 12 3 36 3 48 3 60 260 1 04 1 04 1 30 1 56 1 69 1 82 1 95 2 08 2 21 2 34 2 47 2 60 2 73 2 86 2 81 2 99 3 38 3 64 3 77 3 90 280 1 12 1 12 1 40 1 68 1 82 1 96 2 10 2 24 2 38 2 52 2 66 2 80 2 94 3 08 3 02 3 22 3 64 3 92 4 06 4 20 300 1 20 1 20 1 50 1 80 1 95 2 10 2 25 2 40 2 55 2 70 2 85 3 00 3 15 3 30 3 24 3 45 3 90 4 20 4 35 4 50 320 1 28 1 28 1 60 1 9...

Page 47: ...7 138 2 R1 12 14 16 19 21 23 25 L2 77 89 99 117 133 147 160 2 1 2 R1 14 16 18 21 24 26 29 L2 86 99 111 131 149 165 179 3 R1 15 17 19 23 26 29 31 L2 94 109 122 143 163 180 196 3 1 2 R1 16 19 21 25 28 31 34 L2 102 117 131 155 176 195 212 4 R1 17 20 22 26 30 33 36 L2 109 126 140 166 188 208 226 1 R Centerline Length of Pipe 2 L Centerline Minimum Radius inches Table 24 Radii of Coiled Expansion Loops...

Page 48: ...gerant oil degradation Poor insulation of the compressor System does not operate properly Solutions Remove moisture from the piping Piping ends should remain capped until connections are complete Do not install piping on a rainy day Connect piping properly at the unit s side Remove caps only after the piping is cut the burrs are removed and after passing the piping through the walls Evacuate syste...

Page 49: ...riger ant piping system is free of traps sagging pipes sight glasses filter dryers etc Field Provided Isolation Ball Valves LG maintains a neutral position on using isolation valves in VRF refrigerant piping systems LG does not endorse any manufacturer of isola tion valves It is recognized that installing isolation valves may simplify future maintenance requirements and if used considerations shou...

Page 50: ...al 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 in the confines of the support clamp A properly installed pi...

Page 51: ... inside underground casing must be continuous without any joints Underground refrigerant pipe must be located at a level below the frost line Typical Arrangement of Refrigerant Pipe and Ca ble s in a Utility Conduit Table 25 Utility Conduit Sizes 1 OD pipe diameter in inches Values in parenthesis indicate OD of pipe with insulation jacket 2 Diameter of pipe with insulation Thickness of pipe insula...

Page 52: ...ometry with the figure to the right If the flare is defective cut it off and re do procedure If flare looks good blow the pipe clean with dry nitrogen 90 45 A R 0 4 0 8 Dimensions of the Flare Pipe Size in O D A Dimension mm in 1 2 1 4 5 8 3 8 3 4 Flared Connection Dimensions Tightening Torque Handle Incorrect Flare Even Length Cracked Yoke Inside is shiny with no scratches Surface Damaged Copper ...

Page 53: ...on valves oil separators and heat exchangers that can easily become blocked Proper system operation depends on the installer using best practices and utmost care while assembling the piping system 2 Store pipe stock in a dry place keep stored pipe capped and clean 3 Blow clean all pipe sections with dry nitrogen prior to assembly 4 Use adapters to assemble different sizes of pipe 5 Always use a no...

Page 54: ... plumb When installed horizontally the straight through leg should be level and the branch leg should be within 5 of horizon tal rotation Indoor unit Y branches must always be installed with the single port end towards the outdoor unit and the two port end towards the indoor units The first indoor unit Y branch kit must be located no closer than at least three 3 feet from the outdoor unit Provide ...

Page 55: ...D 3 4 O D 3 4 O D 3 4 1 2 3 13 16 I D 7 8 I D 7 8 I D 7 8 I D 7 8 I D 7 8 O D 7 8 O D 7 8 I D 7 8 I D 7 8 I D 1 4 I D 1 4 I D 1 4 1 1 I D 1 3 8 I D 1 3 8 I D 1 3 8 I D 1 3 8 O D 1 3 8 I D 1 1 8 I D 1 1 8 I D 1 1 8 I D 1 1 8 I D 1 1 8 O D 1 1 8 I D 1 1 8 O D 1 1 4 I D 1 1 4 I D 1 1 4 I D 3 8 I D 3 8 I D 3 8 O D 3 8 1 I D 1 2 I D 1 2 I D 1 2 13 1 16 12 5 8 I D 1 4 I D 1 4 I D 3 8 I D 3 8 I D 3 8 I D...

Page 56: ...tdoor unit leaving enough space for servicing and maintenance Indoor Unit Y Branch Horizontal Configuration Indoor Unit Y branch Vertical Installation Alignment Specifications 5 Horizontal Plane 5 Branch Leg Straight through Leg ELEVATION VIEW Y branch Inlet 3 of Plumb 3 of Plumb 3 of Plumb 3 of Plumb Vertical DOWN Configuration for Outdoor Unit Y Branches NOT PERMITTED Vertical UP Configuration f...

Page 57: ... I D 1 1 8 I D 1 1 8 I D 1 1 8 I D 7 8 4 3 4 I D 7 8 I D 3 4 O D 1 1 8 13 1 16 12 3 8 O D 3 4 O D 5 8 4 3 D I I D 5 8 I D 5 8 I D 5 8 I D 7 8 4 3 8 I D 1 2 I D 1 2 I D 1 2 I D 3 8 2 3 4 3 5 16 I D 3 8 Combination specification Vapor pipe Liquid pipe ARCNN21 ARCNN31 B B 5 1 8 I D 1 1 2 O D 1 3 8 I D 1 5 8 16 3 8 16 1 16 4 3 8 I D 1 3 8 I D 1 1 4 I D 1 1 8 I D 1 1 8 I D 1 1 8 I D 7 8 4 3 4 I D 7 8 I...

Page 58: ...it would be better to home run the run out pipes back to a centralized location If connecting multiple indoor units that are far apart Y branches may be more economical LG Header Kits Consist of Two headers one liquid line one vapor line Reducer fittings as applicable Molded clam shell type peel and stick insulation covers one for the liquid line and one for the vapor line Headers must be installe...

Page 59: ... 4 4 3 4 4 3 4 4 3 4 4 3 4 4 3 4 4 3 4 4 3 4 4 3 4 I D 5 8 I D 1 2 I D 5 8 I D 1 2 I D 5 8 I D 3 4 4 3 4 I D 1 4 I D 3 8 I D 3 8 I D 1 2 6 5 16 22 7 8 I D 3 4 I D 5 8 ID15 88 5 8 ID12 7 1 2 I D 5 8 I D 1 2 I D 7 8 I D 1 1 8 I D 1 27 9 16 4 3 4 I D 1 4 I D 3 8 I D 3 8 I D 1 4 I D 3 8 I D 1 2 I D 5 8 I D 1 2 4 3 4 28 3 8 I D 1 4 I D 3 8 I D 3 8 I D 1 4 I D 1 2 I D 3 8 4 1 4 21 1 2 27 9 16 I D 1 4 I ...

Page 60: ...utdoor unit capacity must be greater than or equal to the slave1 outdoor unit capacity and where applicable slave1 outdoor unit capacity must be greater than or equal to the slave2 outdoor unit capacity Connection piping from branch to branch cannot exceed the main pipe diameter A used by the outdoor unit Install the header branches so that the pipe distances between the between the connected indo...

Page 61: ...of 120 is connected to a 20 ton outdoor unit 24 tons and indoor unit with a 7 000 Btu h capacity is located at the first branch 1 Main pipe A diameters on a 20 ton outdoor unit 1 1 8Ø inches vapor and 5 8Ø inches liquid 2 Pipe diameters between first and second branches however are 1 3 8Ø vapor and 3 4Ø liquid connected downstream indoor unit capacity is 20 tons 3 If main pipe A diameters of a 20 ...

Page 62: ...Unit Y Branch Slave Master Outdoor Unit Y Branch First Indoor Unit Y Branch Outdoor Unit Y Branch First Indoor Unit Y Branch Outdoor Unit Y Branch Slave Master Slave Master Outdoor Unit Y Branch First Indoor Unit Y Branch Outdoor Unit Y Branch First Indoor Unit Y Branch Images are for illustrative purposes only and are not accurate representations For specific details on piping limitations and oth...

Page 63: ...e made after a header INSTALLING FOR HEAT PUMP OPERATION Sample Layouts Header Slave Master First Indoor Unit Y Branch Outdoor Unit Y Branch Slave Master Outdoor Unit Y Branch First Indoor Unit Y Branch Header Outdoor Unit Header Outdoor Unit Images are for illustrative purposes only and are not accurate representations For specific details on piping limitations and other refrigerant system rules ...

Page 64: ...t Pump Operation Use the correct outdoor unit connections to join the outdoor unit to the branch piping in the indoor unit refrigeration system The outdoor unit and branch piping require brazed connections indoor units require flare connections to the refrigerant system Multi V 5 outdoor units designed for heat pump operation use only the liquid pipe and vapor pipe connections as shown in the diag...

Page 65: ...k out procedure Make sure the access holes have smooth edges To avoid damaging the power wiring communication cables install sleeves After piping installation is complete to prevent animals or foreign materials from damaging the outdoor unit cables wiring seal any holes in with sealant plugs foam caulk putty etc Avoid Pipe Damage When routing field provided piping inside the outdoor unit frame avo...

Page 66: ...razed onto it before system is operated Protect the service valve with a wet towel during brazing Verify that the valve stems in the service ports are closed see next page Remove the leak prevention caps from the liquid and vapor pipe outdoor unit connections Use the Schrader valves on the liquid and vapor pipes to perform the leak pressure triple evacuation and trim charge procedures Service Port...

Page 67: ...to the refrigerant circuit it will create oil sludge leading to system malfunction Use PVE polyvinyl ether type refrigeration oil only Protect the liquid and vapor piping ports with a wet towel during brazing Use a 15 silver phosphorous copper brazing alloy to avoid overheating and produce good flow Do not use flux soft solder or anti oxidant agents If the proper material is not used oxidized film...

Page 68: ...ween a Y branch and any other fittings or indoor units There is no limitation on the number of indoor unit Y branches that can be installed but there is a limitation on the number of indoor units connected to a single outdoor unit It is recommended that when a Y branch is located in a pipe chase or other concealed space access doors should be provided for inspection access Indoor Unit Y Branch Hor...

Page 69: ...1 3 3 16 4 3 8 4 3 8 4 3 8 4 3 8 4 3 8 4 3 8 4 3 8 13 1 16 12 5 8 18 9 16 20 3 8 4 15 16 14 5 8 15 1 2 3 5 16 3 5 16 5 1 8 I D 5 8 I D 1 5 8 I D 1 5 8 I D 1 5 8 I D 1 1 2 I D 1 1 2 I D 1 1 2 O D 1 1 2 O D 5 8 1 2 2 3 3 2 2 3 3 2 3 3 3 14 13 16 15 15 16 4 3 4 4 3 4 4 3 4 4 3 4 4 3 4 3 9 16 3 9 16 I D 5 8 I D 5 8 2 3 1 2 1 3 3 16 3 8 17 1 2 O D 5 8 I D 5 8 I D 3 4 I D 3 4 I D 3 4 I D 3 4 I D 3 4 I D...

Page 70: ...r unit leaving enough space for servicing and maintenance Indoor Unit Y Branch Horizontal Configuration Indoor Unit Y branch Vertical Installation Alignment Specifications 5 Horizontal Plane 5 Branch Leg Straight through Leg ELEVATION VIEW Y branch Inlet 3 of Plumb 3 of Plumb 3 of Plumb 3 of Plumb Vertical DOWN Configuration for Outdoor Unit Y Branches NOT PER MITTED Vertical UP Configuration for ...

Page 71: ...7 8 19 5 16 4 3 8 I D 1 1 8 I D 1 3 8 I D 1 1 8 I D 1 1 4 I D 1 I D 1 1 4 I D 1 I D 1 1 8 I D 1 1 4 Combination specification ARCNB21 ARCNB31 Liquid Pipe h c n i t i n U Low Pressure Vapor Pipe High Pressure Vapor Pipe B B A A Multi Frame Connector 5 1 8 16 3 8 4 2 I D 1 1 8 I D 1 1 8 I D 1 3 8 I D 1 5 8 I D 1 1 2 O D 1 3 8 I D 1 1 4 I D 7 8 I D 1 1 8 4 3 8 4 3 4 I D 3 4 I D 7 8 O D 1 1 8 I D 5 8 ...

Page 72: ...d it would be better to home run the run out pipes back to a centralized location If connecting multiple indoor units that are far apart Y branches may be more economical LG Header Kits Consist of Two headers one liquid line one vapor line Reducer fittings as applicable Molded clam shell type peel and stick insulation covers one for the liquid line and one for the vapor line Headers must be instal...

Page 73: ... 4 4 3 4 4 3 4 4 3 4 4 3 4 4 3 4 4 3 4 4 3 4 4 3 4 I D 5 8 I D 1 2 I D 5 8 I D 1 2 I D 5 8 I D 3 4 4 3 4 I D 1 4 I D 3 8 I D 3 8 I D 1 2 6 5 16 22 7 8 I D 3 4 I D 5 8 ID15 88 5 8 ID12 7 1 2 I D 5 8 I D 1 2 I D 7 8 I D 1 1 8 I D 1 27 9 16 4 3 4 I D 1 4 I D 3 8 I D 3 8 I D 1 4 I D 3 8 I D 1 2 I D 5 8 I D 1 2 4 3 4 28 3 8 I D 1 4 I D 3 8 I D 3 8 I D 1 4 I D 1 2 I D 3 8 4 1 4 21 1 2 27 9 16 I D 1 4 I ...

Page 74: ...es To Indoor Units Liquid Pipe inches 3 8 Vapor Pipe inches 5 8 To Outdoor Units Liquid inches 3 8 1 2 5 8 Low pressure Vapor inches 7 8 1 1 8 1 1 8 High pressure Vapor inches 3 4 7 8 7 8 Insulation Material Polyethylene Current Minimum Circuit Amps MCA 0 1 0 15 0 2 Maximum Fuse Amps MFA 15 Power Supply 1Ø 208 230V 60Hz Heat recovery units are REQUIRED for systems that are designed for heat recove...

Page 75: ...e to our policy of continuous product innovation some specifications may change without notification LG Electronics U S A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp PRHR022A INSTALLING FOR HEAT RECOVERY OPERATION Heat Recovery Units ...

Page 76: ...icy of continuous product innovation some specifications may change without notification LG Electronics U S A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp PRHR032A INSTALLING FOR HEAT RECOVERY OPERATION Heat Recovery Units ...

Page 77: ...e to our policy of continuous product innovation some specifications may change without notification LG Electronics U S A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp PRHR042A INSTALLING FOR HEAT RECOVERY OPERATION Heat Recovery Units ...

Page 78: ...2 3 4 Remove Caps Before Brazing Liquid Pipe Low Pressure Vapor Pipe High Pressure Vapor Pipe Close Up of the Heat Recovery Unit Connections Heat Recovery Unit Connections and Limitations Table 37 Heat Recovery Unit Piping Connection Sizes Removing the Caps Before brazing the field supplied refrigerant piping to the heat recovery unit connections the caps MUST be removed from the liquid high press...

Page 79: ...ions for Large Indoor Units If large capacity indoor units larger than 54 000 Btu h are installed the Y branch pipe shown in the table below must be used to twin the ports Kit Model No Vapor Pipe Dimensions Liquid Pipe Dimensions Unit Inch ARBLN03321 16 1 4 15 3 8 I D 3 4 I D 3 4 I D 3 4 I D 1 2 I D 1 2 2 3 4 I D 5 8 I D 5 8 I D 1 I D 1 O D 1 3 3 16 4 3 8 3 5 16 2 3 3 O D 3 4 O D 3 4 1 2 I D 7 8 I...

Page 80: ...er outdoor unit capacity must be greater than or equal to the slave1 outdoor unit capacity and where applicable slave1 outdoor unit capacity must be greater than or equal to the slave2 outdoor unit capacity Connection piping from branch to branch cannot ex ceed the main pipe diameter A used by the outdoor unit Install the header branches or heat recovery units so that the pipe distances between th...

Page 81: ...3 feet x 3 feet Cassette and 15 400 24 200 Btu h High Static Ducted IDUs have 3 8Ø liquid and 5 8Ø vapor Conditional Applications Conditional applications are computed in LATS See below for an explanation of when pipes are upsized If the equivalent length between the first Y branch to the farthest indoor unit is 131 feet maximum 295 feet Pipe segment diameters between the first branch and the last...

Page 82: ... 000 Btu h Indoor Unit 48 000 Btu h Heat Recovery Unit Outdoor Unit Header Indoor Unit 12 000 Btu h Indoor Unit 12 000 Btu h Indoor Unit 12 000 Btu h Indoor Unit 12 000 Btu h Outdoor Unit Heat Recovery Unit Maximum total Indoor Unit capacity per Heat Recovery Unit branch pipe is 54 000 Btu h Outdoor Unit Heat Recovery Unit Outdoor Unit Header Indoor Unit 24 000 Btu h Indoor Unit 24 000 Btu h Y Bra...

Page 83: ...ery Unit 3 Series connection of Heat Recovery Units Total capacity of connected Indoor Units must be 192 000 Btu h Header Slave Master First Indoor Unit Y Branch Outdoor Unit Y Branch Indoor Unit 48 000 Btu h Indoor Unit 48 000 Btu h Heat Recovery Unit 1 Heat Recovery Unit 2 Y Branch Indoor Unit 12 000 Btu h Indoor Unit 12 000 Btu h Indoor Unit 12 000 Btu h Indoor Unit 12 000 Btu h Indoor Unit 24 ...

Page 84: ... 000 Btu h total capacity and up to 32 connected indoor units maximum indoor units per heat recovery unit branch pipe is 8 Zone control groups cannot operate in Auto changeover or Mode override functions In the zone control group if some indoor units are operating in cooling or heating mode the other indoor units cannot change over to operate in the opposite mode Y Branch Indoor Unit Keep the sum ...

Page 85: ...r Indoor Unit 7 000 Btu h Indoor Unit 7 000 Btu h Indoor Unit 7 000 Btu h Incorrect installation Heat Recovery Unit then a Header branch pipe then a Y Branch and Header Branch pipe Incorrect installation Header branch pipe then a Heat Recovery Unit Indoor Unit 7 000 Btu h Indoor Unit 7 000 Btu h Y Branch Incorrect Layouts A second branch cannot be made after a Header Header Outdoor Unit Header Out...

Page 86: ... and branch piping require brazed connections indoor units require flare connections to the refrigerant system Multi V 5 outdoor units designed for heat recovery operation use the liquid pipe high pressure vapor and low pressure vapor pipe connections as shown in the diagram at right WARNING It is imperative that the correct outdoor unit connections be used for the intended system operation heat p...

Page 87: ...ted Through Bottom to Left or Right Side Knock Out for Power Supply Wiring Do not damage the outdoor unit pipes or the base pan when knocking out the access holes To avoid damaging the piping and power wiring communication cables remove any burrs that may have formed during the knock out procedure Make sure the access holes have smooth edges To avoid damaging the power wiring communication cables ...

Page 88: ...t the valve stems in the service ports are closed see next page Remove the leak prevention caps from the liquid high pressure vapor and low pressure vapor pipe outdoor unit connections Use the Schrader valves on the liquid high pressure vapor and low pressure vapor pipes to perform the leak pressure triple evacuation and trim charge procedures Location of the Leak Prevention Caps Service Ports Liq...

Page 89: ...vice Ports 1 2 3 5 6 4 5 Do not expose the outdoor unit service valves to heat Protect the service valve with a wet towel during brazing Before connecting the refrigerant piping make sure the service port valves of the outdoor unit are completely closed factory setting Do not open the service port valves or attempt to operate the system until the refrigerant pipe system installation has been compl...

Page 90: ...ping connection at the farthest outdoor unit must not exceed thirty three 33 feet 2 Elevation difference between outdoor units The elevation difference between the highest and lowest elevation outdoor unit must not exceed sixteen 16 feet Maximum Pipe Length from First Outdoor Unit Y branch to Farthest Outdoor Unit To IDUs HRUs 33 Feet Max Elevation Difference Between Outdoor Units Close Up of An I...

Page 91: ...nch towards an outdoor unit or another outdoor unit Y branch is greater than 6 6 The inverted trap should be installed close to the outdoor unit Y branch no more than 6 6 away Examples of Inverted Traps Inverted Trap Applications Oil Trap To IDUs HRUs Oil Trap Oil Trap Elevation Elevation Elevation Oil Trap To IDUs HRUs To IDUs HRUs Oil Trap Oil Trap Oil Trap Pipe Slope Horizontal pipe slope shoul...

Page 92: ...d Cliffs NJ All rights reserved LG is a registered trademark of LG Corp Height Differential for Separated Outdoor Units Maximum allowable height differential h between two outdoor units is 16 4 feet h 16 4 feet h 16 4 feet To indoor units To indoor units Oil Trap 11 16 inches Example of an Incorrect Height Differential To indoor units REFRIGERANT PIPING FOR SEPARATED OUTDOOR UNITS ...

Page 93: ... air gaps Insulation material shall fit snugly against the refrigeration 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 the sun and outdoor elements shall be properly protected with PVC aluminum vapor barrier ...

Page 94: ... ø3 8 inches 1 2 inches 3 4 inches 3 4 inches 1 inch ø1 2 inches ø5 8 inches ø3 4 inches ø7 8 inches ø1 inch ø1 1 8 inches 3 4 inches ø1 1 4 inches 1 inch 1 inch ø1 3 8 inches ø1 1 2 inches ø1 3 4 inches Table 41 Minimum Refrigerant Pipe EPDM Insulation Wall Thickness Requirements 1 1 The thickness of the above insulation material is based on heat conductivity of 0 61 Btu in h ft2 F 5 Additional I...

Page 95: ...ronments If the system has been operating for a long time in a high humidity environment dew point temperature more than 73 F condensate is likely to form If this happens install 3 8 inch thick ethylene propylene diene methylene EPDM insulation that is plenum rated with a heat resistance factor of more than 248 F Applying Insulation to Y Branch and Header Fittings LG Y branches and Headers should ...

Page 96: ...kers fuses overcurrent protection switches and wiring in accordance with local state and NEC regulations related to electrical equipment and wiring and following the instructions in this manual Generated overcurrent may include some amount of direct current Using an oversized breaker or fuse may result in electric shock physical injury or death Do not connect ground wire to refrigerant gas or wate...

Page 97: ...ont panel to the outdoor unit frame 2 Detach the front panel by pulling it forward 3 Connect the communication cable between the master and slave outdoor units through the terminal blocks 4 Locate the control box For small frame outdoor units the control box is on the right side for large frame outdoor units the control box is on the left side Remove the control box cover to access the PCBs the In...

Page 98: ... Unit to Slave Outdoor Unit Communication Cable Outdoor Unit to Indoor Unit Communication Cable Ground Wiring Main Power Terminal Block Ground Wire When Connecting Communication Cable Ground Wire through Front Panel Gap between Power Wiring and Communication Cable must be 2 inches Power Wiring Communication Cable Routed Through the Front Attach firmly with a cable tie or clamp cord When Connecting...

Page 99: ...ation Cable Ground Wiring Power Wiring Communication Cable Routed Through the Front Power Wiring Communication Cable Routed Through the Bottom Left Main Power Terminal Block Ground Wire When Connecting Communication Cable Ground Wire through Front Panel Gap between Power Wiring and Communication Cable must be 2 inches Attach firmly with a cable tie or clamp cord When Connecting Main Power Wiring G...

Page 100: ...ed to the terminal block Use an appropriately sized screwdriver for tightening the terminals Do not overtighten the connections overtightening may damage the terminals If ring terminals or fork terminals are not available then Do not terminate different gauge wires to the power terminal block Slack in the wiring may generate heat When terminating wires of the same thickness follow the instructions...

Page 101: ... Disconnect Pull box Installer option Pull box Installer option Pull box Installer option R L1 S L2 T L3 R L1 S L2 T L3 R L1 S L2 T L3 L1 L2 Fused Disconnect Fused Disconnect Disconnect Example of a Typical Heat Recovery Operation Power Wiring and Communications Cable System Schematic Switch Communication Line 2 wire Cable Power Line 3 wire Cable Communication Line 3 wire Cable Power Line 2 wire C...

Page 102: ...n this manual Failure to do so may lead to electric shock and bodily injury or death Use specified wiring for connections and ensure that external force is not imparted to terminal connections If connections firmly attached it may generate heat and or cause a fire resulting in physical injury or death Install appropriately sized breakers fuses overcurrent protection switches and wiring in accordan...

Page 103: ...hout notification LG Electronics U S A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp ELECTRICAL Power Supply Power Wiring Specifications Single Frame Outdoor Unit Wiring Configuration from Outside Source to Outdoor Units All field power supply wiring must be engineered per local code ...

Page 104: ...nge without notification LG Electronics U S A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp All field power supply wiring must be engineered per local code Dual Frame Outdoor Unit Wiring Configuration from Outside Source to Outdoor Units ELECTRICAL Power Supply Power Wiring Specifications ...

Page 105: ...hout notification LG Electronics U S A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp ELECTRICAL Power Supply Power Wiring Specifications Triple Frame Outdoor Unit Wiring Configuration from Outside Source to Outdoor Units All field power supply wiring must be engineered per local code ...

Page 106: ... indoor units heat recovery units Insulation as required by NEC and local codes Rated for continuous exposure of temperatures up to 140 F Maximum allowable communication cable length is 3 281 feet ELECTRICAL Communication Cable Specifications HeatRecoveryUnit ForHeatRecovery SystemsOnly MasterOutdoorUnit IndoorUnit IndoorUnit IndoorUnit IndoorUnit IndoorUnit IndoorUnit WiredControllers WiredContro...

Page 107: ...door Unit ODU IDU CENTRAL ODU IDU CENTRAL HeatRecoveryUnit 3 A 4 B A B 3 A 4 B Heat Recovery Operation Communications Cable Between Master Outdoor Unit and Heat Recovery Units Indoor Units Comm B ODU IDU CENTRAL DRY1 DRY2 GND 12V A B A B A Master Outdoor Unit Communication Terminal Block IndoorUnit IndoorUnit From Master Outdoor Unit to Slave Outdoor Unit s Multi Frame Systems Only Communication c...

Page 108: ... communications bus shall be provided a separate cable i e between outdoor unit s and indoor units outdoor units and central controller s If communications cables of separate systems are wired using a common multiple core cable it will result in a poor communications signal and unacceptable system operation The terminals labeled GND are NOT ground terminals The terminals labeled ARE ground termina...

Page 109: ...tails From Master Outdoor Unit to Central Controllers Communication cable from Master Outdoor Unit to Central Controller is to be 18 AWG 2 conductor twisted stranded shielded Ensure the communication cable shield is properly grounded to the Master ODU chassis only Do not ground the communication cable at any other point Wiring must comply with all applicable local and national codes Connect all ce...

Page 110: ...ns SIG 12V GND Comm terminals From the controller to the master indoor unit use 22 AWG 3 conductor twisted stranded unshielded All wiring must comply with all applicable local and national codes From the master indoor unit to the slave indoor unit s daisy chain using 22 AWG 3 conductor twisted stranded unshielded Do not attach wire to 12VDC terminal to the slave indoor units All wiring must comply...

Page 111: ...then connect the gauge manifold to the Schrader ports on the hot gas line high pressure vapor liquid line and suction low pressure vapor service ports For multi frame outdoor units connect the gauge manifold to the Schrader ports on only one outdoor unit preferably the slave outdoor unit that is farthest away from the refrigerant piping system and connected indoor units heat recovery units DANGER ...

Page 112: ...e pressure drops and it is not due to ambient conditions there is a leak and it must be found Remove the bubble solution with a clean cloth repair the leak s and perform the leak pressure check again 9 After the system has been thoroughly tested and no leaks are found depressurize by loosening the charging hose connector at the nitro gen cylinder regulator When system pressure returns to normal co...

Page 113: ...t Closed Schrader Port Closed Liquid Pipe Vapor Pipe Liquid Pipe Farthest Slave Outdoor Unit Master Outdoor Unit Nitrogen Gas Cylinder Indoor Unit Liquid Pipe Vapor Pipe Service Port Closed Gauge Manifold Pipe Not Used in Heat Pump Systems Keep Closed Service Port Closed Service Port Closed Schrader Port and Service Port Closed Schrader Port Open Schrader Port Closed Schrader Port Open Schrader Po...

Page 114: ...port can used Make sure to re install the original Schrader core before operating the system For Heat Pump systems evacuate through both the liquid and vapor refrigerant lines For Heat Recovery systems evacuate through all three 3 hot gas line high pressure vapor liquid line and suction low pressure vapor refrigerant lines The outdoor unit service valves should remain closed and the stem head acce...

Page 115: ...Break vacuum with 50 psig nitrogen purge for an appropriate amount of time this is to sweep moisture from piping 5 Purge nitrogen from the system until the pressure drops down to 1 to 3 psig 6 Evacuate to 1 000 micron level Isolate the pump by closing the manifold gauges and the vacuum pump valve and then watch the micron level Micron level may rise a bit but MUST eventually stop rising for fiftee...

Page 116: ...ump Indoor Unit Farthest Slave Outdoor Unit Master Outdoor Unit Liquid Pipe Liquid Pipe Liquid Side Heat Recovery Unit Gauge Manifold Gauge Manifold Schrader Port and Service Port Closed Schrader Port and Service Port Closed Schrader Port and Service Port Closed Service Port Closed Schrader Port Open Service Port Closed Schrader Port Open Schrader Port Open Service Port Closed Suction Pipe Low Pre...

Page 117: ...B On a Multi Frame System Push the Reset Button on ALL Outdoor Units Vacuum Mode Option Se3 The vacuum mode can be used as an option for creating vacuum in the system when the outdoor unit is first installed if power is avail able and if the system has already been auto addressed Vacuum mode enables the system to fully open all valves and can help speed up the evacuation process Vacuum mode can al...

Page 118: ... prepare the system for commissioning in several steps Prepare the Electrical System Multi V outdoor units require either 208 230V 60Hz 3Ø or 460V 60Hz 3Ø power Verify that the power and phase requirements are cor rect and all three legs are present Make sure that the power imbalance ratio between phases is no greater than 2 If the electrical power is dirty the unit may shutdown on a compressor sa...

Page 119: ...eatures Gen 4 or Higher Gen 4 ONLY Any combination of Models 1A 2A Must be OFF factory default Does NOT include Gen 4 features System will not operate if DIP Switch No 3 is ON and an error code will be generated Gen 4 or Higher Any combination of Gen 2 and Gen 4 Model 2A ONLY Must be OFF factory default Gen 4 or Higher Any combination of Gen 2 and Gen 4 Any combination of Models 1A 2A Must be OFF ...

Page 120: ...rained service technicians who have in depth knowledge and experience working with Multi V systems Service codes provide manual control of the VRF system component s as aides in isolating an operation problem during initial commissioning start up assist with diagnosing an operation problem or used to modify the operation of the oil return and or defrost cycles Saving Optional Mode Settings In gene...

Page 121: ... Mode Function Name Display Default Options Fault Detection and Diagnostics Fdd Integrated Test Run Fd7 Function Func Cool Heat Selector Switch Installed Fn1 oFF oFF oP1 oP2 Saved in EPROM Off Not Installed Static Pressure Compensation Fn2 oFF oFF oP1 oP3 Used for ducted discharge Night Low Sound Fn3 oP10 oP1 oP12 Overall Defrost Fn4 oFF on oFF Off Split Coil Frame Allowed Outdoor Unit Addressing ...

Page 122: ...he specification tables in the Product Data section for the factory refrigerant charge in pounds Example ARUM432BTE5 Consisting of 2 ARUM121BTE5 1 ARUM192BTE5 Factory charge ARUM121BTE5 23 2 lbs each Factory charge ARUM192BTE5 30 9 lbs Field trim charge 10 5 lbs System refrigerant charge Factory charge of frame 1 Frame 2 Frame 3 Field supplied Refrigerant System refrigerant charge 23 2 23 2 30 9 1...

Page 123: ...product innovation some specifications may change without notification LG Electronics U S A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp Setting the Optional Modes Multi V ITR Result Report Continued PRE COMMISSIONING ...

Page 124: ...the SW02C backward button and then press the SW01C confirm button Select the Fn1 function by using the SW03C forward button and the SW02C backward button and then press the SW01C confirm button Select from oFF op1 or op2 options see table below by using the SW03C forward button and the SW02C backward button and then press the SW01C confirm button The Cool Heat Selector function is set PCB does not...

Page 125: ...c Pressure Compensation Function Turn No 5 on the master outdoor unit PCB DIP switch bank SW01 to ON Select the Func mode by using the SW03C forward button and the SW02C backward button and then press the SW01C confirm button Select the Fn2 function by using the SW03C forward button and the SW02C backward button and then press the SW01C confirm button Select from oFF op1 through op3 options see ta...

Page 126: ...nd the SW02C backward button and then press the SW01C confirm button Select the Fn3 function by using the SW03C forward button and the SW02C backward button and then press the SW01C confirm button Select from op1 through op12 options see table by using the SW03C forward button and the SW02C backward button and then press the SW01C confirm button Press the SW01D Reset Button one 1 time to reset PCB...

Page 127: ...all Function Turn No 5 on the master outdoor unit PCB DIP switch bank SW01 to ON Select the Func mode by using the SW03C forward button and the SW02C backward button and then press the SW01C confirm button Select the Fn4 function by using the SW03C forward button and the SW02C backward button and then press the SW01C confirm button Select from on through oFF options see table by using the SW03C fo...

Page 128: ...d with Fn4 Overall Defrost and Fn22 Overall Defrost Operating in Low Temperatures Heating Snow Removal Assist and Rapid Defrost can be used on both heat pump and heat recovery systems A trained LG service provider must set this function during system installation If the snow removal rapid defrost mode is not used set to OFF Turn No 5 on the master outdoor unit PCB DIP switch bank SW01 to ON Select...

Page 129: ... on High Efficiency Function Cooling Operation Selected oFF Default Table 52 Setting the High Efficiency Function Cooling Operation Low Ambient Kit Function Fn9 The function notifies the outdoor unit that a low ambient kit is installed Use in zones that will need cooling when outdoor ambient temperatures fall below 5ºF For use on both heat pump and heat recovery systems Optional low ambient baffle...

Page 130: ...utton The High Efficiency Function in Cooling Operation Auto Dust Throw is set PCB does not need reset High Efficiency Function Cooling Operation Auto Dust Mode Fn11 High Efficiency Function Auto Dust Mode attempts to remove sand debris that may have collected on the outdoor unit coil After the cooling heating etc mode is satisfied this function will start the fan motors operating them at full spe...

Page 131: ...me algorithm irrelevant of which Smart Load Control option selected Smart Load can be used in almost every application except those where the outdoor unit is serving a Dedicated Outdoor Air System contact an LG representative for information Use on both heat pump and heat recovery systems Setting the Optional Modes Humidity Reference Fn16 When humidity reference is selected on the master outdoor u...

Page 132: ...e outdoor unit master outdoor unit if a multi frame system that power consumption should be monitored The function also communicates to the outdoor unit if it will be respon sible for reporting the data to the central control device s or if an optional LG Power Distribution Integrator PDI will be responsible for reporting When the optional PDI is installed the PDI will monitor outdoor unit power c...

Page 133: ...t Operating in Low Temperatures Heating is set PCB does not need reset Setting the Optional Modes Base Pan Heater Optional Function Fn23 Informs the master outdoor unit microprocessor an optional field installed base pan heater sold separately is installed in the outdoor unit Select ing to engage this option should only be done if a properly sized third party heater is in place to keep the bottom ...

Page 134: ...r units will operate in Comfort Cooling Select ALL if Comfort Cooling is to be applied to all indoor units Select EACH if Comfort Cooling is to be applied to some indoor units After the selection is made press the SW01C confirm button If EACH was selected the indoor units that are to be operating in Comfort Cooling must be identified Use the SW03C forward button and the SW02C backward button to sc...

Page 135: ...e Tables below Confirm that this step has been completed by checking the box provided on the Record following the information as it is provided The date is provided in sequence and segment of the sequence will remain lit for two 2 seconds Run Self Diagnostics Check If the indoor units have already been successfully assigned a system address skip this step and go to Assign Addresses to the Heat Rec...

Page 136: ... DIP switch settings except for No 3 on SW01B which should be ON to enable Gen 4 features All other combinations of switches one 1 through seven 7 should be left in the OFF position on the outdoor unit DIP switch bank SW01B Refer to System Combinations and Outdoor Unit Operation Settings for proper setting of No 3 on SW01B If the Auto Address Procedure has never been successfully completed for the...

Page 137: ...utdoor unit to indoor unit s communications cable is not connected to terminals IDU A and IDU B of the outdoor unit 15 Replace the control panel door DIP SW01 SSD SW01C Confirm Automatic Address Setting Button SW01D Reset Button SW02C Backward Button SW03C Forward Button SW04D x Cancel Button Auto Addressing Button Location on Outdoor Unit PCB WARNING Auto addressing procedure is complete The numb...

Page 138: ...er recording the system addresses assigned to each device open the outdoor unit disconnect Remove the outdoor unit to indoor unit communications cable from terminals IDU A and IDU B Protect conductors by placing electrical tape over the bare ends to prevent an accidental compressor start from occurring before the LG trained commissioner arrives 9 Close the disconnect to reapply power to the outdoo...

Page 139: ...s a limit of 16 Members per Hex Group There is a limit of 16 Hex Groups per system There is a limit of 256 possible Member Identifiers per Central Control See Central Controller Communications Limitations Setting Central Control Addresses 1 Verify power to the whole system including indoor units and outdoor unit s is OFF If not turn OFF 2 If not installed already connect the communication cable fr...

Page 140: ... shown in the tables at right Group Number If the building operator wants to know which indoor units are on each outdoor unit and multiple systems serve a building Assign a Group Number to each system If there are more than 16 indoor units on a system multiple Group Numbers may be necessary If the building owner wants to know which indoor units are on each floor Assign a different group number for...

Page 141: ...e information Type in the Central Control address designated for the master indoor unit 7 Disable power to the Master indoor unit Do not restore power to the Master indoor unit at this time It will be restored later 8 If the zone controller and associated communications cable has already been permanently mounted in place reattach cable wiring and obtain a loose zone controller with a communication...

Page 142: ... of each heat recovery unit is the same assign address 0 to the heat recovery unit farthest away from the outdoor unit Assign the next address to the next farthest away and so on until all heat recovery units have an address The heat recovery unit with the highest address should be the one closest to the outdoor unit Up to 16 heat recovery units can be on a single system Possible settings in order...

Page 143: ... No 5 Valve group setting No 6 Valve group setting No 7 Used only in factory production preset to OFF Zone setting ON No 8 Used only in factory production preset to OFF Selecting the Heat Recovery Unit Valve Addressing Method Pipe Detection Auto Manual Zone Control Setting DIP Switch Settings Normal Control Zone Control 1 Main Function of SW02M 1 2 7 6 5 4 3 1 2 7 8 6 5 4 3 ON OFF 8 1 1 2 7 8 6 5 ...

Page 144: ...ts cap off the third and fourth ports and set the DIP switches on the heat recovery unit for two ports connected as shown in the table above Any unused port must be sealed with a brazed copper cap not with a plastic cap PRHR032A Three 3 ports PRHR022A Two 2 ports PRHR042A Four 4 ports 1 2 3 1 2 1 3 2 4 Select the Heat Recovery Unit Model 1 Identify how many ports are connected see table below 2 Gr...

Page 145: ...or unit Large capacity indoor unit Indoor unit Indoor unit Large capacity indoor unit Indoor unit Indoor unit Large capacity indoor unit Large capacity indoor unit Large capacity indoor unit Indoor unit Indoor unit Indoor unit Indoor unit 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 Control 1 1 2 7 8 6 5 4 3 ON OFF 2 3 4 5 6 7 8 1 1 2 7 8 6 5 4 3 ON OFF 2 3 4 5 6 7 8 1 1 2 7 8 6 5 4 3 ON OFF 2 3 4 5 6 ...

Page 146: ...the heat recovery unit valve to the central control address of the connected indoor unit SW01M Select the valve to address SW03M Increases the valve address by ten 10 SW04M Increases the valve address by one 1 Each indoor unit must have a unique preset central control address using its wired controller before manual valve addressing can occur PCB Component S W No Set Up No 1 Manual Addressing Valv...

Page 147: ... 5 4 4 5 6 7 8 1 1 2 4 3 ON OFF 2 3 4 SW01M 1 1 2 4 3 ON OFF 2 3 4 SW01M Turn the DIP Switch of the zoned branch to ON Example Branches one 1 and two 2 are set to zone control 3 SW01M SW03M SW04M DIP and Tact Switches for Manual Valve Addressing continued Zoning Set the address of the heat recovery unit valve to the central control address of the connected indoor unit SW01M Select the valve to add...

Page 148: ...ding on the number of connected indoor units and the ambient outdoor temperature 11 The number of indoor units detected is displayed for thirty 30 seconds to one 1 minute on the outdoor unit PCB after the outdoor unit stops The number of indoor units connected to each heat recovery unit will be displayed If there is an auto pipe detection error 200 will be displayed If there are no auto pipe detec...

Page 149: ...ay error on outdoor unit PCB Display error on heat recovery unit PCB Outdoor unit PCB HR HR unit number Valve number Heat recovery unit 200 Check heat recovery and indoor units Pipe detection error occurs after thirty 30 seconds Check the pipe installation of the outdoor indoor and heat recovery units Auto pipe detection is incomplete Retry the auto pipe detection procedure after troubleshooting I...

Page 150: ...ess into each indoor unit using its wired remote control 2 Turn No 1 of DIP switch bank SW02M of the heat recovery unit PCB ON 3 Reset the power of the heat recovery unit PCB 4 Through the heat recovery unit PCB manually set address of each heat recovery unit valve to the central control address of the indoor unit connected to that valve 5 Reset the power to the outdoor unit PCB 6 The number of th...

Page 151: ...ay None 2 Operation Turn DIP switch No 1 on to address valve No 1 SW01M Display Existing value saved in EPROM is displayed on SSD 3 Operation Set the 10 digit of the Group High data number of the wired remote control connected to the corresponding indoor unit to the valve No 1 by pressing left tack switch SW03M Display Digit increases with the number of times the tack switch is pressed shown on th...

Page 152: ...ith FF Prerequisite for manual pipe detection The cen tral control address of each indoor unit must be preset differently using its wired remote control Example An indoor unit with a central control address of 11 is connected to valve no 1 of an heat recovery unit No Display Setup Description 1 Operation None Display None 2 Operation Turn DIP switch No 1 on to address valve No 1 Display Existing v...

Page 153: ...itch No 1 to ON Display 11 displays on SSD 2 Operation Turn DIP switch No 1 to OFF Display SSD is blank No Display Setup Description 1 Operation More than two 2 DIP switches turned ON Display SSD displays Er Identifying the Manual Valve Address SW01M SW01M SSD SW01M SSD SSD 1 1 2 4 3 ON OFF 2 3 4 1 1 2 4 3 ON OFF 2 3 4 1 1 2 4 3 ON OFF 2 3 4 Wait for eighty 80 seconds after power is turned ON Zoni...

Page 154: ...urned to the indoor unit without mixing with other sources such as outside air or open plenum air Temperature sensor should be installed in a location where the temperature of the area is representative of the desired zone temperature and in an easily accessible location Do not install the temperature sensors in Areas affected by drafts Dead spots behind doors or in corners Areas affected by hot c...

Page 155: ...the temperature sensed by the return air temperature sensor when the ducted indoor unit fan is not operating could be affected by the distance of the duct run If the return air is not representative of the space due to outside air introduction open plenum or other reasons using a remote controller or remote temperature button sensor is required Considerations for Ducted Units Multiple Spaces Singl...

Page 156: ...meters Extended operation in these conditions will result in Fan surge noisy slow pulsating airflow and or Fan motor failure Set Value Static Pressure in wg 0 19 0 23 0 31 0 39 0 47 0 55 0 59 0 62 0 66 0 70 0 78 91 1 642 1 543 1 349 1 105 819 494 317 130 96 1 762 1 628 1 518 1 183 1 098 649 483 317 91 101 1 839 1 772 1 691 1 395 1 320 964 889 628 314 215 106 1 815 1 808 1 779 1 568 1 522 1 176 1 1...

Page 157: ...start the outdoor unit s charge refrigerant or open service valves until directed by your Commissioner After commis sioning the contractor will be notified if there are any corrections needed to allow warranty activation The Distributor or LG Rep Controls Contractor may provide assistance with controls setup final device programming BMS integration air balance adjustments etc and pro ceed with any...

Page 158: ... hour the system will display the error code shut down and restart again each time If the malfunction occurs a tenth 10th time within the same one 1 hour the system shuts down permanently assigning the error to a Level 1 response that requires a manual restart The error code displays on the zone controllers and central controllers until the malfunction is fixed Level 2 Responses Level 2 responses ...

Page 159: ...0 7 Indoor units are not operating in the same mode Heat pump applications only Different operation mode between indoor units 0 8 Hydro kit hot water storage tank temperature sensor error Pipe temperature sensor disconnected or shorted 0 9 Indoor unit EPROM error Communication error between the indoor unit PCB board and its option card The option card is about 1 x 1 and is plugged into the indoor ...

Page 160: ...less than 43 C or greater than 96 C less than 45 4 F or greater than 204 8 F Temperature sensor disconnected or shorted 1 8 Hydro kit outlet pipe temperature sensor communica tion error Outlet pipe temperature sensor disconnected or short circuited 2 3 0 Refrigerant leak sensor error Refrigerant leak sensor error sensor is malfunctioning Refrigerant leak is detected when 6 000 ppm Enable the funct...

Page 161: ...electrical condenser component serving capacitor on inverter driver board Improper input voltage R S T N or power wiring no N phase 2 3 2 Low or high DC voltage to the slave1 outdoor unit invert er compressor DC link 2 3 3 Low or high DC voltage to the slave2 outdoor unit invert er compressor DC link 2 4 1 Master outdoor unit high pressure switch error System has been turned off by the master outd...

Page 162: ...ide pressure below allowable limits System will shut down when an abnormal low pressure condi tion occurs Shut down occurs when the sum of all compressors inverter frequency 30Hz low 110 kPa for 1 minute When operating in cooling mode Low side pressure 400 kPa for 1 minute High side pressure is 2 200 kPa Check for refrigerant leaks low refrigerant charge or a defective indoor unit EEV When operati...

Page 163: ...re sensor error Slave2 outdoor unit inverter compressor2 discharge temperature sensor disconnected or shorted 4 9 1 Master outdoor unit IPM temperature sensor error Master outdoor unit IPM temperature sensor disconnected or shorted 4 9 2 Slave1 outdoor unit IPM temperature sensor error Slave1 outdoor unit IPM temperature sensor disconnected or shorted 4 9 3 Slave2 outdoor unit IPM temperature sens...

Page 164: ...heatsink System shut off because of high temperatures at the master outdoor unit inverter heatsink 6 2 2 High temperature at the slave1 outdoor unit inverter heatsink System shut off because of high temperatures at the slave1 outdoor unit inverter heatsink 6 2 3 High temperature at the slave2 outdoor unit inverter heatsink System shut off because of high temperatures at the slave2 outdoor unit inv...

Page 165: ...orrectly 1 0 4 1 Communication error between master outdoor unit and slave outdoor units Master outdoor unit main PCB is not receiving signals from slave outdoor units 1 0 4 2 Communication error between slave1 outdoor unit and master and slave2 outdoor units Slave1 outdoor unit main PCB is not receiving signals from master and slave2 outdoor units 1 0 4 3 Communication error between slave2 outdoo...

Page 166: ...ve low oil levels Slave1 outdoor unit oil level sensor disconnected or shorted 1 1 6 3 Slave2 outdoor unit oil level sensor error Slave2 outdoor unit may have low oil levels Slave2 outdoor unit oil level sensor disconnected or shorted 1 4 5 1 Communication error between master outdoor unit main board and external board Master outdoor unit main board to external board communica tion failure 1 4 5 2...

Page 167: ...r greater than 96 C less than 45 4 F or greater than 204 8 F Prevents HEX from bursting when operating Does not protect HEX if the glycol is inadequate nor if the hydro kit is off and not operating Outdoor unit compressor ramps up and hydro kit operates One 1 minute later pipe temperature at mid temperature hot water supply inlet or outlet water is 0 C 32 F and mid tempera ture hot water supply in...

Page 168: ...cooling pipe inlet sensor 2 0 3 Heat recovery unit subcooling pipe outlet sensor error C Heat recovery unit Heat recovery unit number Disconnection or short circuit of heat recovery unit subcooling pipe outlet sensor 2 0 4 Communication error between outdoor unit and heat recovery unit C Heat recovery unit Heat recovery unit number Outdoor unit does not receive signal from heat recovery unit 2 0 5...

Page 169: ...ual outdoor fan speed Target outdoor unit fan speed Actual superheat Target superheat Actual subcooler circuit superheat Target subcooler circuit superheat Main EEV position Subcooling EEV position Inverter compressor current transducer value Outdoor air temperature Actual high pressure saturation temperature Actual low pressure saturation temperature Suction temperature Inverter compressor discha...

Page 170: ...al screens include 1 Cycleview Graphic of internal components including Compressors showing actual speeds EEVs Indoor units Liquid injection valves Temperature and pressure sensors Four way reversing valve Outdoor fans showing status and speeds 2 Graph Full screen graph of actual high and low pressures and high and low pressure limits A sliding bar allows viewing of previously recorded data 3 Cont...

Page 171: ... to monitor system operation using LGMV Software at least once a year Table 82 Maintenance Recommendations Component Maintenance Occurrence Minimum Indoor Units Wash filters On a regular basis as needed Clean coils Once a year Clean check unit base pan Once a year Outdoor Unit s Clean coils Once or twice a year Clean check condensate pan Once or twice a year Communications Cable and Power Wiring V...

Page 172: ... possession a copy of the As Designed LATS Multi V piping tree diagram BEFORE ANY FIELD PIPE SIZE OR LENGTH CHANGES ARE MADE PROPOSED CHANGES MUST BE FORWARDED TO THE DESIGN ENGINEER SO THAT THEY CAN INPUT THE CHANGES INTO LATS and RE ISSUE A NEW LATS MULTI V PIPING TREE DIAGRAM Installer must receive change authorization from the design engineer because any change made requires the review of the ...

Page 173: ...ower wiring and control cable terminations All power and control wires were properly separated using the recommended distance provided in the product installation manual Only LG supplied Y cables were used between grouped indoor units R L1 to Ground _____________________ S L2 to Ground _____________________ T L3 to Ground ______________________ R S _______________________________ R T _____________...

Page 174: ... some specifications may change without notification LG Electronics U S A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp INSTALLATION CHECKLIST PAGE 3 Major Component Rough In Piping and Insulation Brazing Practices ...

Page 175: ...ion LG Electronics U S A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp INSTALLATION CHECKLIST PAGE 4 Installation Refrigerant Piping Installation Heat Recovery Unit Installation Condensate Pump Drain Installation Installation Power Wire and Communications Cables ...

Page 176: ...er the compressor crankcase heater s Must be at least 6 hours before commissioning The communications cable to the indoor units has been disconnected from the IDU B and IDU A terminals at the outdoor unit s None of the outdoor unit s service valves have been opened during the installation and preparation of the system for commissioning If the valves were opened the factory refrigerant charge has b...

Page 177: ...sioning Send all Pre Commissioning Package Documents to your LG Applied Representative Prepare Pre Commissioning Package Documents Include Check 1 A copy of the refrigerant piping system s shop drawing s generated by LATS Multi V pipe design software 2 A copy of the pipe fitter s pipe changes and field notes 3 A verified copy of the As Built LATS Multi V Project file mtv that includes all changes ...

Page 178: ... innovation some specifications may change without notification LG Electronics U S A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp Notes for the LG Trained Commissioner PRE COMMISSIONING CHECKLIST Page 3 ...

Page 179: ... innovation some specifications may change without notification LG Electronics U S A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp Notes for the LG Trained Commissioner PRE COMMISSIONING CHECKLIST Page 4 ...

Page 180: ...on Job Name Location_________________________________________________________________________ Tag __________________ Date _____________________________________________________________________________________ Address __________________________________________________________________________________ __________________________________________________________________________________ Prepare Pre Commis...

Page 181: ..._________________________________________________ Address __________________________________________________________________________________ __________________________________________________________________________________ Refrigerant Circuit Preparation Prepare Pre Commissioning Package Documents Initiate a Commissioning Request Date of Commissioning Report __________________________________ LG ...

Page 182: ...tem ID Page Mech Contractor Company Name MEP Project Mngr Name Pre Com Tech Name Ph email Ph Email IDU s Unit Tag Building Floor Room ID Type Model Serial System Address Central Control Address Group member ID or N A if not in a group Group Function M Master S Slave Sensor Strategy RA ZC Both Adjusted Fan Setting Value Low Medium High ...

Page 183: ...on such as submittals indoor unit engineering manuals installation service product data performance general best practice and building ventilation manuals as well as white papers catalogs LATS software programs and more log in to www lghvac com ...

Page 184: ...4300 North Point Parkway Alpharetta Georgia 30022 www lg vrf com New Issue IM_MultiV 5_OutdoorUnits_05_17 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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