LG Multi V water mini, ARWN048GA2, ARWN038GA2, ARWN053GA2 Maintenance Manual

Installation, Operation & Maintenance Manual

Variable Refrigerant Flow Water Source Units

3.0, 4.0, and 4.4 Tons

Heat Pump 208-230V, 60Hz, 1 Phase

ARWN038GA2 ARWN048GA2 ARWN053GA2

Note:

PROPRIETARY DATA NOTICE

This document, as well as all reports, illustrations, data, information, and

other materials are the property of LG Electronics U.S.A., Inc., and are

disclosed by LG Electronics U.S.A., Inc., only in confidence.

This document is for design purposes only.

Do not throw away, destroy, or lose this manual.

Please read carefully and store in a safe place for future reference.

Content familiarity 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 below.

" "

A summary list of safety precautions begins on page 4.

This symbol indicates that the action or lack thereof could possibly cause equipment malfunction or failure.

This symbol indicates that the following action should not be performed.

This symbol indicates that the action or lack thereof could possibly cause death or personal injury.

This symbol indicates that the action or lack thereof could possibly cause property damage.

For more technical materials such as submittals, engineering

databooks, and catalogs, visit www.lg-vrf.com.

For continual product development, LG Electronics U.S.A., Inc., reserves the right to change specifications without notice.

This document, as well as all reports, illustrations, data, information, and other materials are the property of LG Electronics U.S.A., Inc.

©LG Electronics U.S.A., Inc.

TABLE OF CONTENTS

Safety Precautions ...................................................................................................................................................................................................... 4-7

Installation… .............................................................................................................................................................................................................. 4-5

Wiring ………………………………………………………………………………………………………………………………………………………………… 6 Operation …………………………………………………………………………………………………………………………………………………………… 7

Nomenclature �� 8

Water Source Unit Specications ............................................................................................................................................................................ 9-16

General and Electrical Data .......................................................................................................................................................................................... 9

Dimensions ................................................................................................................................................................................................................. 10

Refrigerant Circuits ................................................................................................................................................................................................ 11-13

Wiring Diagram ........................................................................................................................................................................................................... 14

Accessories ........................................................................................................................................................................................................... 15-16

Installation �� 17-62

Placement Considerations .......................................................................................................................................................................................... 17

Transporting / Lifting the Water Source Unit ............................................................................................................................................................... 18

Minimum Space Requirements .................................................................................................................................................................................. 19

General Mounting / Anchoring the Water Source Unit ................................................................................................................................................ 20

Refrigerant Piping Installation ............................................................................................................................................................................... 21-40

Computer-assisted Refrigerant Pipe Design .............................................................................................................................................................. 21

System Engineering .............................................................................................................................................................................................. 22-30

Pipe Sizing ............................................................................................................................................................................................................. 31-34

Refrigerant Pipe Connections ................................................................................................................................................................................ 35-37

Insulating the Refrigerant Piping System .............................................................................................................................................................. 38-39

Pressure Testing ........................................................................................................................................................................................................ 40

Product Data

Water Circuit Installation ...................................................................................................................................................................................... 41-117

Water Circuit Design .............................................................................................................................................................................................. 41-42

Piping System Specications ................................................................................................................................................................................ 43-46

Flow Switches and Solenoid Valves ...................................................................................................................................................................... 47-48

Variable Water Flow Control Kit ............................................................................................................................................................................. 49-56

Electrical System Installation ................................................................................................................................................................................. 57-62

General Information .................................................................................................................................................................................................…57

Power Wiring .............................................................................................................................................................................................................. 58

Wiring and Cable Terminations ................................................................................................................................................................................... 59

Communications Cables ........................................................................................................................................................................................ 60-62

Pre-commissioning and Maintenance ................................................................................................................................................................... 63-78

Preparing the Electrical System ................................................................................................................................................................................. 63

Indoor Unit Auto Addressing Auto Addressing ....................................................................................................................................................... 63-66

Group Control ............................................................................................................................................................................................................. 67

Central Control ...................................................................................................................................................................................................... 67-69

Indoor Unit Temperature Sensing Strategy / Air Balance ........................................................................................................................................... 70

Prepare the Refrigerant Piping System ...................................................................................................................................................................... 71

Preparing / Balancing the Water Circuit ...................................................................................................................................................................... 72

Prepare Pre-commissioning Package Documents ..................................................................................................................................................... 73

Initiate a Request ........................................................................................................................................................................................................ 73

Maintaining the Heat Exchanger ................................................................................................................................................................................ 74

General Maintenance Schedule ............................................................................................................................................................................ 75-76

Error Codes .............................................................................................................................................................................................................. 77-82

LG Monitoring View (LGMV) Diagnostic Software ................................................................................................................................................. 77-78

Error Code Tables .................................................................................................................................................................................................. 79-81

Checklists ................................................................................................................................................................................................................. 83-90

LG Multi V Pre-Commissioning Device

Conguration Worksheet ............................................................................................................................................................................................ 83

Installation Checklist .............................................................................................................................................................................................. 84-85

Pre-commissioning Checklist ................................................................................................................................................................................ 86-89

Refrigerant Charge Worksheet ................................................................................................................................................................................... 90

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

SAFETY PRECAUTIONS

Note:

The instructions below 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 below.

" "

This symbol indicates that the action or lack thereof could possibly cause death or personal injury.

" "

This symbol indicates that the action or lack thereof could possibly cause equipment malfunction or failure.

This symbol indicates that the action or lack thereof could possibly cause property damage.

" "

This symbol indicates that the following action should not be performed.

INSTALLATION

Do not install, remove, or re-install the unit by yourself (customer). Ask the dealer or an authorized technician to install the unit.

Improper installation by the user may result in water leakage, re, explosion, electric shock, physical injury or death.

For replacement of an installed unit, always contact an authorized LG service provider.

There is risk of re, electric shock, explosion, and physical injury or death.

Do not install the water-source units outside.

There is risk of re, electric shock, explosion, and physical injury or death.

Be very careful when transporting the product.

• One person should not carry the product.

• Some products use polypropylene bands for packaging. Do not use polypropylene bands to lift the unit.

• Suspend the water source unit from the base at specified positions. Support the water source unit a minimum of four points to avoid slip-

MULTI V Water Mini System Installation Manual

page from rigging apparatus.

The water source unit is shipped with refrigerant and the service valves closed. Do not open service valves on the water source unit until all non-condensable have been removed from the piping system and authorization to do so has been obtained from the commissioning agent.

There is a risk of equipment damage, refrigerant contamination, refrigerant loss, physical injury or death.

The water source unit is shipped with a refrigerant and service valves closed. Do not run the compressor with the service valves closed.

There is a risk of equipment damage, explosion, physical injury, or death.

Dispose the packing materials safely.

• Packing materials, such as nails and other metal or wooden parts, may cause puncture wounds or other injuries.

• Tear apart and throw away plastic packaging bags so that children may not play with them and risk suffocation and death.

Install the unit considering the potential for strong winds or earthquakes.

Improper installation may cause the unit to fall over, resulting in physical injury or death.

If the air conditioner is installed in a small space, take measures to prevent the refrigerant concentration from exceeding safety limits in the event of a refrigerant leak.

Consult the latest edition of ASHRAE (American Society of Heating, Refrigerating, and Air Conditioning Engineers) Standard 15. If the refrigerant leaks and safety limits are exceeded, it could result in personal injuries or death from oxygen depletion.

Wear protective gloves when handling equipment. Sharp edges may cause personal injury.

Do not install the unit on a defective stand.

It may result in an accident that causes product damage or personal injury or death.

Do not change the settings of the protection devices.

If the pressure switch, thermal switch, or other protection device is shorted and forced to operate improperly, or parts other than those

specied by LG are used, there is risk of re, electric shock, explosion,

and physical injury or death.

Do not store or use ammable gas or combustibles near the

unit.

There is risk of product failure, re, explosion, and physical injury or death.

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

INSTALLATION, CONTINUED

Note:

SAFETY PRECAUTIONS

Replace all control box and panel covers.

If cover panels are not installed securely, dust, water and animals may enter the water source unit, causing re, electric shock, and physical injury or death.

Install the unit in a safe location where nobody can step on or fall onto it.

There is risk of unit damage, physical injury or death.

Keep the unit upright during installation.

To avoid vibration or water leakage.

When installing the water source unit in 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 a slippery oor condition and / or water damage to

walls.

Always check for system refrigerant leaks after the unit has been installed or serviced.

Low refrigerant levels may cause product failure, and exposure to high concentration levels of refrigerant gas may lead to illness or death.

When installing the unit in a hospital, data center, or similar

electromagentic eld (EMF) sensitive environment, provide sufcient protection against electrical noise.

Inverter equipment, power generators, high-frequency medical equipment, or radio communication equipment may cause the air conditioner to operate improperly. The unit may also affect such equipment by creating electrical noise that disturbs medical treatment or image broadcasting.

Do not use the product for special purposes such as preserving foods, works of art, wine coolers, or other precision air conditioning applications. The equipment is designed to provide comfort cooling and heating.

There is risk of property damage.

Product Data

Do not make refrigerant substitutions. Use R410A only.

If a different refrigerant is used, or air mixes with original refrigerant, the unit will malfunction and be damaged.

When connecting refrigerant tubing, remember to allow for pipe expansion.

Improper piping may cause refrigerant leaks and system malfunction.

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

Do not install the water source unit in a noise sensitive area.

Take appropriate actions at the end of HVAC equipment life to recover, recycle, reclaim or destroy R410A refrigerant according to applicable U.S. Environmental Protection Agency (EPA) rules.

Note:

SAFETY PRECAUTIONS

WIRING

The information contained in this manual is intended for use

by an industry-qualied, experienced, certied electrician

familiar with the U.S. National Electric Code (NEC) who is equipped with the proper tools and test instruments.

Failure to carefully read and follow all instructions in this manual can result in equipment malfunction, property damage, personal injury or death.

All electric work must be performed by a licensed electrician and conform to local building codes or, in the absence of local codes, with the National Electrical Code, and the instructions given in this manual.

If the power source capacity is inadequate or the electric work is not

performed properly, it may result in re, electric shock, physical injury or

death.

High voltage electricity is required to operate this system. Adhere to the NEC code and these instructions when wiring.

Improper connections and inadequate grounding can cause accidental injury or death.

Always ground the unit following local, state, and NEC codes.

There is risk of re, electric shock, and physical injury or death.

Properly size all circuit breakers or fuses.

There is risk of re, electric shock, explosion, physical injury or death.

Refer to local, state, and federal codes, and use power wires

of sufcient current capacity and rating.

Wires that are too small may generate heat and cause a re.

Secure all eld wiring connections with appropriate wire

strain relief.

Improperly securing wires will create undue stress on equipment power lugs. Inadequate connections may generate heat, cause a re and physical injury or death.

Properly tighten all power lugs.

Loose wiring may overheat at connection points, causing a re, 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

specied by LG are used, there is risk of re, electric shock, explosion,

and physical injury or death.

Turn the power off at the nearest disconnect before servicing the equipment.

Electrical shock can cause physical injury or death.

Do not supply power to the unit until all installation and precommissioning tasks are complete and the commissioning agent indicates it is safe to do so.

MULTI V Water Mini System Installation Manual

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

OPERATION

SAFETY PRECAUTIONS

Do not allow water, dirt, or animals to enter the unit.

There is risk of unit failure, re, electric shock, physical injury or death.

Do not provide power to or operate the unit if it is ooded or

submerged.

There is risk of re, electric shock, physical injury or death.

Use a dedicated outlet for this product.

There is risk of re, electric shock, physical injury or death.

Do not operate the disconnect switch with wet hands.

There is risk of re, electric shock, physical injury or death.

Periodically verify the equipment mounts have not deteriorated.

If the base collapses, the unit could fall and cause property damage, product failure, physical injury or death.

Do not touch the refrigerant piping during or after operation.

It can cause burns or frostbite.

Do not operate the unit with the panel(s) or protective cover(s) removed; keep ngers and clothing away from moving parts.

The rotating, hot, cold, and high-voltage parts of the unit can cause physical injury or death.

If gas leaks out, ventilate the area before operating the unit.

Leaking gas may cause re, electric shock, explosion, physical injury or

death if the water source unit is mounted in an enclosed, low-lying, or poorly ventilated area and the system develops a refrigerant leak.

To avoid physical injury, use caution when cleaning or servicing the air conditioner.

There is a risk of equipment damage, refrigerant contamination, refrigerant loss, physical injury or death.

The water source unit is shipped with a refrigerant and service valves closed. Do not run the compressor with the service valves closed.

There is a risk of equipment damage, explosion, physical injury, or death.

Product Data

Do not use this equipment in mission critical or specialpurpose applications such as preserving foods, works of art, wine coolers or refrigeration. The equipment is designed to provide comfort cooling and heating.

Oil, steam, sulfuric smoke, etc., can signicantly reduce the performance of the unit, or damage its parts.

Do not turn off the main power switch after operation has been stopped.

Wait at least ve (5) minutes before turning off the main power switch, otherwise it may result in product malfunction.

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

Provide power to the compressor crankcase heaters at least six (6) hours before operation begins.

Starting operation with a cold compressor sump(s) may result in severe bearing damage to the compressor(s). Keep the power switch on during the operational season.

Clean up the site after servicing is nished, and check that

no metal scraps, screws, or bits of wiring have been left inside or surrounding the unit.

UNIT NOMENCLATURE

Water Mini Unit

Water Source Units (WSU)

Family AR = Multi V (Refrigerant R410A)

Condenser W = Water Source

Type N = Heat Pump

Nominal Capacity Nominal cooling capacity in Btu/h

038 = 38,200 048 = 47,800 053 = 52,900

AR W N

038 G A

Electrical Ratings G = 208–230V / 60Hz / 1Ø

MULTI V Water Mini System Installation Manual

Basic Function = A

Generation 2 = Second

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

GENERAL DATA

Water Mini Unit Specications and Electrical Data

Table 1: General Data—ARWN038GA2, ARWN048GA2, ARWN053GA2 Water Mini Units.

3.0 Ton 4.0 Ton 4.4 Ton

Model Number ARWN038GA2 ARWN048GA2 ARWN053GA2

Nominal Capacity / Input Power

Cooling Capacity (Btu/h) Cooling Input Power (kW) 2.1 2.7 3.2 Heating Capacity (Btu/h) Heating Input Power (kW) 2.2 2.9 3.5

Compressor

Type Inverter Rotary Inverter Rotary Inverter Rotary Power Supply (volt/hz/phase) MCA (A) 26 26.5 27 MOP (A) 45 45 45

System Data

Sound Pressure (dBA) Heat Rejected to Equipment Room (Btu/h) 512 512 512 Net Weight (lbs) 168 168 168 Shipping Weight (lbs) 181 181 181 Dimensions (W x H x D) 20-5/8 x 42-1/2 x 13-1/8 20-5/8 x 42-1/2 x 13-1/8 20-5/8 x 42-1/2 x 13-1/8

Max. Qty Indoor Units 6 8 9

Refrigerant Piping Connections

Vapor Line OD (in) 3/4 Braze 3/4 Braze 3/4 Braze Liquid Line OD (in) 3/8 Braze 3/8 Braze 3/8 Braze Expansion Device Electronically Controlled (EEV) Electronically Controlled (EEV) Electronically Controlled (EEV)

Factory Refrigerant Charge (R410A [lbs]) 2.2 2.2 2.2

Water Side

Heat Exchanger Stainless Steel Plate Stainless Steel Plate Stainless Steel Plate Water Volume in Heat Exchanger (gal.) Water Inlet/Outlet Connection

Size (in) Nominal Flow Rate Total (GPM) Range of Flow (GPM) Entering water temp. range (°F)– Cooling 50-113 50-113 50-113 Entering water temp. range (°F)– Heating 23-113 23-113 23-113 Total Heat of Rejection (Btu/h) 44,330 55,550 56,640 Total Heat of Absorption (Btu/h) 35,087 44,697 49,448 Pressure Drop (ft) 4.7 6.9 9.5 Maximum Water Pressure (psi) 640 640 640

ΔT (°F)

Cooling – Indoor 80°F DB/66°F WB, Water Temp. Entering 86°F;

Heating- Indoor 68°F DB, Water Temp. Entering 68°F.

Voltage tolerance is ±10%.

Sound pressure levels as tested in anechoic chamber under ISO

Standard 3745.

38,200 47,800 52,900

42,600 54,600 61,400

208-230 / 60 / 1 208-230 / 60 / 1 208-230 / 60 / 1

52 53 54

0.2 0.2 0.2

1-1/4 FPT 1-1/4 FPT 1-1/4 FPT

10.6 13.2 15.9

5.5-13.3 6.9-16.5 8.3-19.9

Refer to the Refrigerant Piping Section of this manual for correct line sizing. Contractor MUST use LG manufactured Y-branch fittings only. Designer must verify refrigerant piping design configuration using LG’s computerized refrigerant piping CAD/calculation (LATS) Software to layout and design the refrigerant piping system.

8 8 7

Calculated from ∆T = Total Heat of Rejection / (Nominal flow rate

x 500).

Product Data

Table 2: 208-230V, 60Hz, 1-Phase Water Mini Unit Electrical Characteristics.

Nominal Tons Unit Model No. Compressor Qty. Compressor Motor RLA MSC MCA MOP

3.0 ARWN038GA2 1 20.8 - 26 45

4.0 ARWN048GA2 1 21.2 - 26.5 45

4.4 ARWN053GA2 1 21.6 - 27 45

MCA = Minimum Circuit Ampacity. MOP = Maximum Overcurrent Protection is calculated as follows: (Largest motor FLA x 2.25) + (Sum of

other motor FLA) rounded down to the nearest standard fuse size. Allowable voltage range is between 208–230 volts only (tolerance is 10%). Maximum allowable voltage imbalance is 2%.

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

Power wiring to be sized to meet local or NEC codes. Measurements are taken with no attenuation and units operating at full load nominal operating

condition. Measurements are taken 4.9 feet above the finished floor and a distance of 3.3 feet from the face of the

fan discharge.

DIMENSIONS

Water Outlet

Wate

ARWN038GA2, ARWN048GA2, ARWN053GA2

Figure 1: ARWN038GA2, ARWN048GA2, ARWN053GA2 Dimensions.

Top View

apped Line

apor Line

Liquid Line

MULTI V Water Mini System Installation Manual

r Inl

ront View

Isometric

ide View

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

REFRIGERANT FLOW DIAGRAMS

EEV

Filter

EEV

Filter

Indoor HEX

Fan

Indoor Unit

Fan

Liquid

Gas

HEX Temp

Liquid Temp

Suction Temp

Hot Gas Bypass Valve

4 Way Valve

Main EEV

Low Pressure Sensor

Accumu

lator

Inv. Comp.

High Pressure Switch

Discharge Temp

High Pressure Sensor

Check Valve

Solenoid Valve

Strainer

Thermistor

Remark

High Pressure Switch

High

Water In Water Out

Plate Heat Exchanger

Pressure Sensor

SVC Valve

Fusible Plug

EEV

Fusible Plug

High Temperature High Pressure Gas High Temperature High Pressure Liquid Low Temperature Low Pressure Gas

ARWN038GA2, ARWN048GA2, ARWN053GA2

Figure 2: ARWN038GA2, ARWN048GA2, ARWN053GA2—Cooling Mode.

Cooling Mode

Product Data

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

REFRIGERANT FLOW DIAGRAMS

Heating Mode

ARWN038GA2, ARWN048GA2, ARWN053GA2

Figure 3: ARWN038GA2, ARWN048GA2, ARWN053GA2—Heating Mode.

Indoor HEX

Fan

High Temperature High Pressure Gas High Temperature High Pressure Liquid Low Te mperature Low Pressure Gas

Water In Water Out

HEX Temp

Plate Heat Exchanger

EE V

Filter

Indoor Unit

4 Way Valve

Hot Gas Bypass Valve

Indoor HEX

Fan

High Pressure Switch

EEV

Filter

Indoor Unit

High Pressure Sensor

Main EEV

MULTI V Water Mini System Installation Manual

Remark

Check Valve

EEV

Solenoid Valve

Accumu

lator

Pressure Sensor

Fusible Plug

Low Pressure Sensor

High Pressure Switch

Inv. Comp.

Suction Temp

Liquid Temp

Strainer

Discharge Temp

Thermistor

SVC Valve

High

Gas

Liquid

Fusible Plug

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

REFRIGERANT FLOW DIAGRAMS

Filter Filter

Indoor Unit

Fan

Indoor HEX Indoor HEXEEV EEV

Liquid

Gas

HEX Temp

Liquid Temp

Suction Temp

Hot Gas Bypass Valve

4 Way Valve

Main EEV

Low Pressure Sensor

Accumu

lator

Inv. Comp.

High Pressure Switch

Discharge Temp

High Pressure Sensor

High

Water In Water Out

Plate Heat Exchanger

Fusible Plug

Check Valve

Solenoid Valve

Strainer

Thermistor

Remark

High Pressure Switch

Pressure Sensor

SVC Valve

Fusible Plug

EEV

High Temperature High Pressure Gas High Temperature High Pressure Liquid Low Temperature Low Pressure Gas

ARWN038GA2, ARWN048GA2, ARWN053GA2

Figure 4: ARWN038GA2, ARWN048GA2, ARWN053GA2—Oil Return.

Oil Return Operation

Product Data

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

WIRING DIAGRAM

ARWN038GA2, ARWN048GA2, ARWN053GA2

Figure 5: ARWN038GA2, ARWN048GA2, ARWN053GA2 Wiring Diagram.

MULTI V Water Mini System Installation Manual

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

Vapor pipe Liquid pipe

Unit: Inch

Models

ARBLN01621

ARBLN03321

16-1/4

15-3//8

I.D. 3/4

O.D. 5/8

I.D. 1/2

I.D. 5/8

I.D. 1/2

11-1/2

11-1/16

11-1/2

11-1/16

2-15/16

2-3/4

I.D. 5/8

I.D. 1

O.D. 1

3-3/16

4-3/8

13-1/16

12-5/8

3-5/16

O.D. 3/4

1 2

I.D. 7/8

I.D. 1/4

I.D. 1-1/8

I.D. 3/8

O.D. 3/8

Table 4: Required Accessories.

Required Accessories Model No.

Y-branches

(for indoor unit connection)

Headers

(for indoor unit connection)

Four (4) branch Seven (7) branch Ten (10) branch

ARBL054 ARBL057 ARBL1010 ARBL104 ARBL107 ARBL2010

Y-branches (for indoor unit connection)

Table 3: Y-branch Table.

ACCESSORIES

ARBLN01621 ARBLN03321

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

Product Data

Unit: Inch

4 branch

ARBL054

7 branch

ARBL057

4 branch

ARBL104

7 branch

ARBL107

10 branch

ARBL1010

10 branch

ARBL2010

Models Vapor pipe Liquid pipe

14-3/16

21-1/4

4-3/4

I.D. 5/8

I.D. 1/2

I.D. 5/8

I.D. 3/4

4-3/4

14-3/16

I.D. 3/8

I.D. 1/4

I.D. 3/8

I.D. 1/2

5-15/16

15-3/4

6-5/16

I.D. 5/8

I.D. 1/2

I.D. 3/4

I.D. 5/8

I.D 7/8

I.D. 1-1/8

I.D. 1

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. 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. 1/4

I.D. 3/8I.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. 1/4

I.D. 1/2

I.D. 3/8

4-1/4

21-1/2

27-9/16

I.D. 1/4

I.D. 3/8

I.D. 3/4

I.D. 5/8

I.D. 3/8

I.D. 1/4

4-3/4

6-5/16

29-7/8

I.D. 3/4

I.D. 5/8

I.D. 7/8

I.D. 1-1/8

I.D. 1

7-3/16

30-9/16

I.D. 3/4

I.D. 5/8

I.D. 1/2

I.D. 1-1/8

I.D. 1-1/4

I.D. 1-3/8

5-15/16

4-3/4

14-3/16

I.D. 3/8

I.D. 1/4

I.D. 3/8

I.D. 1/2

ACCESSORIES

Headers (for indoor unit connection)

Table 5: Header Table.

MULTI V Water Mini System Installation Manual

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

INSTALLATION

Note:

Placement Considerations

Selecting the Best Location

The water source unit must be installed indoors in a mechanical room. The mechanical room must be designed such that equipment vibration or noise does not affect surrounding rooms, and is properly ventilated or conditioned to maintain an acceptable ambient temperature range between 32°F and 104°F. Mechanical room temperature is required to be maintained between 32°F and 104°F. The water source unit will reject heat to the mechanical room. See the “General Data” on page 9 for the amount of heat rejected to the equipment room.

• The water source unit must also be located where the refrigerant pipe system is designed within the piping limitations set forth in the Water Mini Engineering Manual. Location of the water source unit should be strategically located in the building to minimize refrigerant piping materials, labor, and refrigerant.

• The underlying structure or foundation must be designed per local codes and support the weight of the unit. Units can be stacked above each other as long as each water source unit is independently supported. Minimum clearances must be maintained either per recommendations shown in Figures 2 and 3 or local codes, whichever is greater. Include enough space in the installation area for service access (refer to the installation space requirements).

• The mechanical room floor should be made waterproof. Periodic flushing of the water heat exchanger will be required, and a floor drain installed nearby the equipment will help facilitate this maintenance.

Installation Instructions

• The water-source unit should be installed with a closed-loop water system. If an open-loop system is used, it is recommended that an intermediate heat exchanger be installed.

• When piping, towers, or other system components that contain water and are exposed to ambient air temperatures below 32°F, an antifreeze solution must be used. Frozen water will damage the plate heat exchanger. A typical antifreeze solution consists of a proper mixture of ethylene glycol, propylene glycol, or methanol mixed with water. The designer should also consider the use of a supplemental boiler / heater to maintain minimum temperatures.

Avoid exposing the water-source unit to oil, steam, combustible gases, acidic solutions or sprays, carbon ber, sulfur, or other corrosive gases. Avoid exposure to electromagnetic waves from EMF radiating machinery such as generators, MRI equipment, or other equipment that emits electromagnetic energy. The control system may be affected by electromagnetic energy, which may result in abnormal system operation. Also, the inverter components in the water source units may generate electromagnetic noise, therefore, ensure the water-source unit is placed at an acceptable distance from computer, audio, and other sensitive electronic equipment. Route power wiring and communications cables in separate conduits.

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

INSTALLATION

≤40° Mounting Rail

A: B:

Transporting / Lifting the Water Source Unit

Transporting / Lifting

• When lifting the unit, use lifting straps and place around the unit as shown below.

• Always lift the unit using properly sized lifting straps rated to carry the unit weight.

• Ensure the straps are long enough to maintain a maximum of a 40° angle as shown at “A”.

Figure 6: Transporting the Water Source Unit.

Table 6: Water Mini Net and Shipping Weights.

Capacity

(ton)

3.0 168 181

4.0 168 181

4.5 168 181

Net Weight

(lbs.)

Shipping

Weight (lbs.)

MULTI V Water Mini System Installation Manual

• One person should not carry the product.

• Some products include polypropylene bands around the unit for packaging. Do not use polypropylene bands to lift the unit.

• Tear apart and throw away plastic packaging bags so that children may not play with them and risk suffocation and death.

• Lift the water source unit from the base at specified locations. Support the water source unit at a minimum of six (6) points to avoid

slippage from the rigging apparatus.

• Do not drop the unit when carrying it with a forklift.

• Use a minimum of three (3) lifting straps.

• Place a protective cloth or other soft material at the locations where the casing comes in contact with the lifting straps to prevent

damage to painted surfaces.

• Always know where the center of gravity of the water source unit is before lifting. Hoist the unit with the center of gravity centered among the lifting straps.

Caution when using forklift to transport an unpackaged unit. Consider the unit’s center of gravity when lifting. Protect the painted surfaces as necessary to prevent damage to the unit nish.

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

: Required Minimum Service Area

7/8

7-1/2

20-1/2

Field-Provided H-Beam Support

Unit: Inch

23-5/8

42-1/2

7/8

Front View

Water pipe installation space

Plan View

Exterior of

Water Source

Unit

Service area

(Front)

INSTALLATION

Field-Provided H-Beam Support or Floor

Unit: Inch

Note:

Minimum Space Requirements

Installation Space

When installing the water-source unit, provide service requirements as illustrated. If local code requires additional clearance area, comply with local codes.

Job site conditions may require routing utilities—including the refrigerant piping and electrical wiring—under the unit base. If job site conditions warrant, consider adding mounting rails under the unit.

Figure 7: Required Minimum Space for Water Mini Unit Installation.

Figure 8: Stacked Water Source Units.

Installation Instructions

42-1/2

Field-Provided H-Beam Support

42-1/2

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

Note:

Unit: Inch

INSTALLATION

General Mounting / Anchoring the Water Source Unit

General Mounting

Securely attach the water source unit to a concrete pad, base rails, or other mounting platform that is anchored to the building structure. Avoid placing the unit in a low lying area where water may accumulate. Refer to dimensional drawing in the “Product Data” section on page 10, and follow the applicable local code for clearance, mounting, anchor, and vibration attenuation requirements.

• When building a base support for the water source unit, ensure that the floor surface / location has enough strength to support the weight of the unit, and enough space for pipes and wiring.

• Install the water source unit to a base and in a manner approved by the structural engineer to minimize damage to the unit in the event of an earthquake. Any deficiency in installation may cause unit to fall, resulting in physical injury or death.

Anchoring the Water Source Unit

Figure 9: Location of the Anchor Bolts.

15-1/4

Front

Plan View

• Securely fasten all four (4) corners to the

MULTI V Water Mini System Installation Manual

supporting base.

• If not otherwise directed by the structural engineer or local codes, Use a 7/16 inch or 1/2 inch diameter J-bolt. Use a hexagon nut with a spring washer.

• Include anti-vibration material chosen by the acoustics engineer.

• Include enough space for refrigerant piping and electrical wiring when installing through the bottom of the unit.

• Use an H-beam, concrete support, or other acceptable support structure designed by a structural engineer.

Figure 10: Close up of Anchor Bolts.

Unit Mounting

H-Beam

Foot

13-15/16

Location of the

anchor bolts

Spring Washer

Nut

Side View

Anti-vibration

Material

Unit: Inch

Concrete

Base

Three Threads

Four Bolts Required

All referenced materials are to be eld-supplied. Images are not to scale, are for reference only, and are not intended to be used for design purposes.

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

REFRIGERANT PIPING DESIGN

Note:

Computer-assisted Refrigerant Pipe Design

LATS Multi V Piping Design Software

The proper design and installation of the refrigerant piping system is a critical element of the Multi V system. Multi V Water Mini requires two pipes between system components – a liquid line and a vapor line. A properly designed refrigerant piping system ensures that refrigerant is delivered to the evaporator coil’s electronic expansion valve (EEV) in a pure liquid state free of gas bubbles. A proper design also ensures a sufficient refrigerant gas flow rate in the vapor line that eliminates the possibility of refrigeration oil from collecting in the vapor lines.

Figure 11: LATS Pipe System Design Tool in Tree Mode.

Refrigerant Piping Quality Assurance

LG’s LATS Multi V software makes designing the refrigerant system easy. LATS Multi V is a Windows®-based application that assists the engineer in the design of the refrigeration distribution pipe system, verifies the design complies with pipe design limitations, applies capacity correction factors, and calculates the system refrigerant charge. The piping system can be entered manually into LATS from a one-line pipe diagram. To ensure that the refrigerant piping design meets LG’s quality standards, a LATS refrigerant piping design must be

provided with every Multi V Water Mini order. Following the installation, if any changes or variations to the design were necessary, a new “as-built” LATS piping design software report must be created and provided to LG prior to system commissioning.

Systems that are close to the standard application limits may be converted into a conditional application by field changes to pipe equivalent lengths. User should always check the LATS report actual pipe layout versus pipe limits. The user may want to increase pipe lengths when design conditions are approaching the Standard Application Piping Rule limits to force the LATS program to engineer the system using the “Conditional Application Pipe Rules,” which will increase the diameter of the main and a few branch segments to minimize the possibility of required pipe changes due to field installation variations.

Refrigerant Piping

Note:

Any eld changes, such as re-routing, shortening or lengthening a pipe segment, adding or eliminating elbows and/or ttings, re-sizing, adding, or eliminating indoor units, changing the mounting height or moving the location of a device or tting during installation should be done with caution and ALWAYS VERIFIED in LATS MULTI V SOFTWARE BEFORE supplies are purchased or installed. Doing so may lead to a more protable installation, reduce the potential for rework, and will reduce the potential for multiple visits to the job site to complete the system commissioning.

Adjusting LATS Multi V Output for Altitude

When a system is installed at elevations significantly above sea level, the designer must also consider the impact air density has on the capacity of the indoor and water source units. LATS does not de-rate indoor unit capacity for high altitude applications. Locally accepted altitude correction factors must be applied to indoor unit capacities.

Creating a Balanced Piping System

Unlike designing duct-work or chilled and hot water pipe systems where balancing dampers, ball valves, orifices, circuit setters, or other flow control devices can be installed to modify or balance the flow of cooling medium, these cannot be used in a VRF system. Therefore, variable refrigerant flow systems have to be designed to be “self balanced.” Balanced liquid refrigerant distribution is solely dependent on the designer choosing the correct pipe size for each segment. Pipe sizing considerations include pipe length, pipe segment pressure drop relative to other pipe segments in the system, type and quantity of elbows, bends present, fitting installation orientation, and end use device elevation differences.

It is imperative the designer avoids creating excessive pressure drop. When liquid refrigerant is subjected to excessive pressure drop, liquid

refrigerant will change state and “ash” to vapor. Vapor present in a stream of liquid refrigerant before reaching the electronic expansion valve (EEV) results in a loss of system control and causes damage to the valve. The pipe system must be designed in a manner that avoids

the creation of unwanted vapor.

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

REFRIGERANT PIPING DESIGN

System Engineering

Device Connection Limitations

• The minimum number of connected and operating indoor units to a Multi V Water Mini system is one, taking into consideration of the minimum combination ratio.

• The maximum number of indoor units on a Multi V Water Mini heat pump systems is:

ARWN038GA2 = 6 ARWN048GA2 = 8 ARWN053GA2 = 9

One of the most critical elements of a Multi V Water Mini system is the refrigerant piping. The table below lists pipe length limits that must be followed in the design of a Multi V Water Mini refrigerant pipe system:

Table 7: Multi V Water Mini Liquid Refrigerant Pipe Design Limitations.

Longest total equivalent piping length ≤475.7 feet

230 feet (Actual)

295.2 feet (Equivalent)

≤ 131 feet

Pipe Length

(ELF = Equivalent Length of pipe

in Feet)

Elevation (All Elevation

Limitations are Measured in

Actual Feet)

Longest distance from water source unit to indoor

unit

Distance between ttings and indoor units ≥20 inches

Distance between ttings and Y-branches ≥20 inches

Distance between two Y-branches ≥20 inches

Distance between Header and indoor units ≥20 inches

Minimum distance between indoor unit to any

Y-branch

Maximum distance between rst Y-branch to farthest

indoor unit

Water-source unit above or below indoor unit ≤ 98.4 feet

Between any two indoor units ≤ 49 feet

3 feet from indoor unit to Y-branch

Table 8: Equivalent Piping Length for Y-branches, Headers, and Typical Refrigeration Elbows.

Component

MULTI V Water Mini System Installation Manual

Elbow (ft.) 0.5 0.6 0.7 0.8 1.2 1.3 1.5 1.6 1.8 2.0 2.1 2.3 2.5 2.8

Y-branch (ft.)

Header (ft.) 3.3

Kit contains two Y-branches: one for liquid and one for vapor.

1/4 3/8 1/2 5/8 3/4 7/8 1 1-1/8 1-1/4 1-3/8 1-1/2 1-5/8 1-3/4 2-1/8

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

Size (Inches)

1.6

REFRIGERANT PIPING DESIGN

Note:

System Engineering

Selecting Field-Supplied Copper Tubing

Copper is the only approved refrigerant pipe material for use with LG Multi V commercial air conditioning 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) ACR copper tubing is available in sizes 3/8 through 2-1/8 inches (ASTM B 280, clean, dry, and capped).

• Annealed temper (soft) ACR copper tubing is available in sizes 1/4 through 2-1/8 inches (ASTM B 280, clean, dry, and capped).

Tube wall thickness should meet local code requirements and be approved for an operating pressure of 551 psi. If local code does not specify wall thickness, LG suggests using tube thickness per table below. When bending tubing, try to keep the number of bends to a minimum, and use the largest radii possible to reduce the equivalent length of installed pipe; also, bending radii greater than ten (10) pipe diameters can minimize pressure drop. Be sure no traps or sags are present when rolling out soft copper tubing coils.

Table 9: ACR Copper Tubing Material.

Type Seamless Phosphorous Deoxidized

Class UNS C12200 DHP

Straight Lengths H58 Temper

Coils O60 Temper

Refrigerant Piping

Table 10: Piping Tube Thicknesses.

OD (in) 1/4 3/8 1/2 5/8 3/4 7/8 1-1/8 1-3/8

Material Rigid Type “K” or “L” and Soft ACR Acceptable Rigid Type “K” or “L” Only

Min. Bend

Radius (in)

Min. Wall

Thickness (in)

Table 11: ACR Copper Tubing Dimensions and Physical Characteristics

Nominal Pipe

Outside

Diameter (in)

.563 .9375 1.5 2.25 3.0 3.0 3.5 4.0

.03 .03 .035 .040 .042 .045 .050 .050

1-4

Actual Outside

Diameter (in)

Nominal Wall

Thickness (in)

Drawn Temper Annealed Temper

Weight (lb/ft)

Cubic ft per

Linear ft

Nominal Wall

Thickness (in)

Weight (lb/ft)

1/4 0.250 -- -- -- 0.030 0.081 .00020 3/8 0.375 0.030 0.126 .00054 0.032 0.134 .00053 1/2 0.500 0.035 0.198 .00101 0.032 0.182 .00103 5/8 0.625 0.040 0.285 .00162 0.035 0.251 .00168 3/4 0.750 0.042 0.362 .00242 0.042 0.362 .00242 7/8 0.875 0.045 0.455 .00336 0.045 0.455 .00336

1-1/8 1.125 0.050 0.655 .00573 0.050 0.655 .00573

All dimensions provided are in accordance with ASTM B280 – Standard.

Design pressure = 551 psig.

ACR Tubing is available as hard drawn or annealed (soft) and are suitable for use with R410A refrigerant.

The Copper Tube Handbook, 2010, Copper Development Association Inc., 260 Madison Avenue, New York, NY 10016.

Cubic ft per

Linear ft

• Commercially available piping often contains dust and other materials. Always blow it clean with a dry inert gas.

• Prevent dust, water or other contaminants from entering the piping during installation.

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

REFRIGERANT PIPING DESIGN

±5°

To indoor unit

To outdoor unit

System Engineering

LG Engineered Y-branch Kits and Header Kits

LG Y-branch and Header kits are highly engineered devices designed to evenly divide the flow of refrigerant, and are used to join one pipe

segment to two or more segments.

No Substitutions

Only LG supplied Y-branch and Header ttings (as referenced below; sold separately) can be used to join one pipe segment to two or more segments. Third-party or eld-fabricated Tee’s, Y-ttings, Headers, or other branch ttings are not qualied for use with LG Multi V Water Mini systems. The only eld-provided ttings allowed in a Multi V Water Mini piping system are 45° and 90° elbows.

Table 12: Y-Branches and Headers.

Y-branches

4 branch 7 branch 10 branch

ARBLN01621 ARBL054 ARBL057 ARBL1010 ARBLN03321 ARBL104 ARBL107 ARBL2010

• If the diameter of the branch pipe segments differ from that of the designated refrigerant piping, trim the to the desired section using a pipe cutter, and then use an adapter to connect.

• Always follow manufacturer’s guidelines on refrigerant piping restrictions such as maximum length, elevation difference, and diameters. Failure to do so can result in reduced heating / cooling performance or equipment malfunction.

Headers

LG Y-branch kits consist of:

• Y-branches (liquid line, vapor lines).

• Reducer fittings as applicable.

• Molded clam-shell type insulation covers.

Y-Branch Kits

LG supplied Y-branches must be used at each transition. Field-supplied “T” fittings or “Y” branches are not acceptable. Each LG supplied Y-branch kit comes with two (2) Y-branches for indoor units, step-down pipe reducers, and insulation covers.

Y-branches may be installed in horizontal or vertical configurations. When installed vertically, position the Y-branch so the straight-through leg is ±3° of plumb. When installed horizontally, position the Y-branch so the take-off leg is level and

shares the same horizontal plane as the straight-through leg ±5° rotation.

There is no limitation on the number of Y-branches that can be installed, but there is a limitation on the number of indoor units connected to a single water source unit.

Y-branches should always be installed with the single port facing the water-source

MULTI V Water Mini System Installation Manual

unit, the two-port end facing indoor units (Do not install Y-branches backwards as

shown in Figure 15.) Refrigerant flow cannot make U-turns through Y-branches.

The first Y-branch kit must be located at least three (3) feet from the water source unit. Provide a minimum of 20 inches between a Y-branch and any other fittings or indoor unit piped in series. 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. The equivalent pipe

length of each Y-branch (1.6′)

must be added to each pipe segment entered into LATS piping design software.

Figure 15: Diagram of an Incorrect Y-branch Installation.

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

LG Header kits consist of:

• Two Headers (one liquid line, one vapor line).

• Reducer fittings as applicable.

• Molded clam-shell type insulation covers.

Figure 12: Y-branch Connections.

Figure 13: Y-branch Installation Alignment Specication.

Vertical up conguration.

Figure 14: Horizontal Conguration End View.

Straight-through Leg

To next branch

To indoor unit

Y-branch Inlet

Vertical down conguration.

Branch Leg

Horizontal Plane

±5°

Note:

Smaller IDUs

Connect IDUs

Largest IDU

Header Inlet

Header End View

+0.0

-0.0

REFRIGERANT PIPING DESIGN

System Engineering

Y-branch Insulation

Figure 16: Y-branch Insulation and Pipe Detail.

Each Y-branch kit comes with clam-shell type peel-and-stick insulation jackets

molded to t the Y-branch ttings—one for the liquid line, one for the vapor line.

• Check the t of the Y-branch clam-shell insulation jacket after the Y-branch is installed.

• Mark the pipe where the insulation jacket ends.

• Remove the jacket.

• Install eld-provided insulation on the three (3) pipes rst.

• Peel the adhesive glue protector slip and install the clam-shell jacket over the

tting.

Header Kits

Install Correctly

• Y-branches can be installed upstream between the Header and the water-source unit, but a Y-branch cannot be installed between a header and an indoor unit.

• To avoid the potential of uneven refrigerant distribution through a header fitting, minimize the difference in equivalent pipe length between the header fitting and each connected indoor unit.

Header kits are intended for use where multiple indoor units are in the same vicinity and 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. See page 16 for Header kit specifications and capacities.

Y-branches can be installed between the Header and the water source unit, but a Y-branch cannot be installed between a Header and an indoor unit. Headers must be installed in a horizontal and level position with the distribution ports of the fitting in the same horizontal plane as the straight-through branch.

When connecting indoor units to a Header, always connect the unit with the largest nominal capacity to the port closest to the water source unit. Then install the next largest indoor unit to the next port, working down to the smallest indoor unit. Do not skip ports.

All indoor units must be mounted at an elevation below the Header fitting. All indoor units connected to a single Header fitting should be

located with an elevation difference between indoor units that does not exceed 49 feet. If indoor units are located at an elevation the same

as or above the Header fitting, do not use a Header. Instead, install a Y-branch fitting between the water source unit and the Header fitting, and connect the elevated indoor unit to the Y-branch.

Figure 18: Header Kit—Horizontal Rotation Limit (Must be Installed Level with No Rotation).

Refrigerant Piping

Header Insulation

Each Header kit comes with clam-shell type peel and stick insulation jackets molded to fit the Header fittings—one for the liquid line and one for the vapor line.

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

Figure 17: Header Insulation and Pipe Detail.

Field supplied copper pipe

Field supplied insulation

Field supplied copper pipe

LG supplied insulation jacketLG supplied header

REFRIGERANT PIPING DESIGN

System Engineering

No Pipe Size Substitutions

Use only the pipe size selected by the LATS Multi V pipe system design software. Using a different size is prohibited and may result in a system malfunction or failure to work at all.

Obstacles

When an obstacle, such as an I-beam or concrete T, is in the path of the planned refrigerant pipe run, it is best practice to route the pipe over the obstacle. If adequate space is not available to route the insulated pipe over the obstacle, then route the pipe under the obstacle. In either case, it is imperative the length of the horizontal section of pipe above or below the obstacle be a minimum of three (3) times the longest vertical rise (or fall) at either end of the segment.

Copper Expansion and Contraction

Under normal operating conditions, the vapor pipe temperature of a

Multi IV system can vary as much as 280°F. With this large variance

in pipe temperature, the designer must consider pipe expansion and contraction to avoid pipe and fitting fatigue failures.

Refrigerant pipe along with the insulation jacket form a cohesive unit that expands and contracts together. During system operation, thermal heat transfer occurs between the pipe and the surrounding insulation.

If the pipe is mounted in free air space, no natural restriction to movement is present if mounting clamps are properly spaced and installed. When the refrigerant pipe is mounted underground in a utility duct stacked among other pipes, natural restriction to linear movement is present. In extreme cases, the restrictive force of surface friction between insulating jackets could become so great that natural expansion ceases and the pipe is “fixed” in place. In this situation, opposing force caused by change in refrigerant fluid/vapor temperature can lead to pipe/fitting stress failure.

The refrigerant pipe support system must be engineered to allow free expansion to occur. When a segment of pipe is mounted

MULTI V Water Mini System Installation Manual

between two fixed points, provisions must be provided to allow pipe expansion to naturally occur. The most common method is the

inclusion of expansion Loop or U-bends. See Figure 20 on page 28.

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 calculated using the following formula:

LE = C x L x (Tr – Ta) x 12

LE = Anticipated linear tubing expansion (in.) C = Constant (For copper = 9.2 x 10-6 in./in.°F) L = Length of pipe (ft.)

= Refrigerant pipe temperature (°F)

= Ambient air temperature (°F)

12 = Inches to feet conversion (12 in./ft.)

Figure 19: Installing Piping Above and Below an Obstacle.

Above an obstacle.

1. From Table 13, find the row corresponding with the actual length of the straight pipe segment.

2. Estimate the minimum and maximum temperature of the pipe. In the column showing the minimum pipe temperature, look up the anticipated expansion distance. Do the same for the maximum pipe temperature.

3. Calculate the difference in the two expansion distance values. The result will be the anticipated change in pipe length.

Below an obstacle.

General Example:

A Multi V system is installed and the design shows that there is a 130 feet straight segment of tubing between a Y-branch and an indoor unit. In heating, this pipe transports hot gas vapor to the indoor units at 120°F. In cooling, the same tube is a suction line

returning refrigerant vapor to the water source unit at 40°F. Look up

the copper tubing expansion at each temperature and calculate the difference.

Vapor Line

Transporting Hot Vapor: 130 ft. pipe at 120°F = 1.54 in. Transporting Suction Vapor: 130 ft. pipe at 40°F = 0.52 in. Anticipated Change in Length: 1.54 in. – 0.52 in. = 1.02 in.

Liquid Line

The liquid temperature remains relatively the same temperature; only the direction of flow will reverse. Therefore, no significant change in length of the liquid line is anticipated.

When creating an expansion joint, the joint height should be a minimum of two times the joint width. Although different types of expansion arrangements are available, the data for correctly sizing

an Expansion Loop is provided in Table 14. Use soft copper with

long radius bends on longer runs or long radius elbows for shorter pipe segments. Using the anticipated linear expansion (LE) distance calculated, look up the Expansion Loop or U-bend minimum design dimensions. If other types of expansion joints are chosen, design

per ASTM B-88 Standards.

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

See table below for precalculated anticipated expansion for various pipe sizes and lengths of refrigerant tubing.

To find the anticipated expansion value:

1. From the table below, find the row corresponding with the actual feet of the straight pipe segment.

2. Estimate the minimum and maximum temperature of the pipe.

3. In the column showing the minimum pipe temperature, look up the anticipated expansion distance corresponding to the segment length. Do the same for the maximum pipe temperature.

4. Calculate the difference in the two expansion distance values. The result will be the change in pipe length.

Table 13: Linear Thermal Expansion of Copper Tubing in Inches.

Pipe

Length

100 0.40 0.40 0.50 0.60 0.65 0.70 0.75 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.08 1.15 1.30 1.40 1.45 1.50

120 0.48 0.48 0.60 0.72 0.78 0.84 0.90 0.96 1.02 1.08 1.14 1.20 1.26 1.32 1.30 1.38 1.56 1.68 1.74 1.80

140 0.56 0.56 0.70 0.84 0.91 0.98 1.05 1.12 1.19 1.26 1.33 1.40 1.47 1.54 1.51 1.61 1.82 1.96 2.03 2.10

160 0.64 0.64 0.80 0.96 1.04 1.12 1.20 1.28 1.36 1.44 1.52 1.60 1.68 1.76 1.73 1.84 2.08 2.24 2.32 2.40

180 0.72 0.72 0.90 1.08 1.17 1.26 1.35 1.44 1.53 1.62 1.71 1.80 1.89 1.98 1.94 2.07 2.34 2.52 2.61 2.70

200 0.80 0.80 1.00 1.20 1.30 1.40 1.50 1.60 1.70 1.80 1.90 2.00 2.10 2.20 2.16 2.30 2.60 2.80 2.90 3.00

220 0.88 0.88 1.10 1.32 1.43 1.54 1.65 1.76 1.87 1.98 2.09 2.20 2.31 2.42 2.38 2.53 2.86 3.08 3.19 3.30

240 0.96 0.96 1.20 1.44 1.56 1.68 1.80 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

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 1.92 2.08 2.24 2.40 2.56 2.72 2.88 3.04 3.20 3.36 3.52 3.46 3.68 4.16 4.48 4.64 4.80

340 1.36 1.36 1.70 2.04 2.21 2.38 2.55 2.72 2.89 3.06 3.23 3.40 3.57 3.74 3.67 3.91 4.42 4.76 4.93 5.10

360 1.44 1.44 1.80 2.16 2.34 2.52 2.70 2.88 3.06 3.24 3.42 3.60 3.78 3.96 3.89 4.14 4.68 5.04 5.22 5.40

380 1.52 1.52 1.90 2.28 2.47 2.66 2.85 3.04 3.23 3.42 3.61 3.80 3.99 4.18 4.10 4.37 4.94 5.32 5.51 5.70

400 1.60 1.60 2.00 2.40 2.60 2.80 3.00 3.20 3.40 3.60 3.80 4.00 4.20 4.40 4.32 4.60 5.20 5.60 5.80 6.00

420 1.68 1.68 2.10 2.52 2.73 2.94 3.15 3.36 3.57 3.78 3.99 4.20 4.41 4.62 4.54 4.83 5.46 5.88 6.09 6.30

440 1.76 1.76 2.20 2.64 2.86 3.08 3.30 3.52 3.74 3.96 4.18 4.40 4.62 4.84 4.75 5.06 5.72 6.16 6.38 6.60

460 1.84 1.84 2.30 2.76 2.99 3.22 3.45 3.68 3.91 4.14 4.37 4.60 4.83 5.06 4.97 5.29 5.98 6.44 6.67 6.90

480 1.92 1.92 2.40 2.88 3.12 3.36 3.60 3.84 4.08 4.32 4.56 4.80 5.04 5.28 5.18 5.52 6.24 6.72 6.96 7.20

500 2.00 2.00 2.50 3.00 3.25 3.50 3.75 4.00 4.25 4.50 4.75 5.00 5.25 5.50 5.40 5.75 6.50 7.00 7.25 7.50

Pipe length baseline temperature = 0°F. "Expansion of Carbon, Copper and Stainless Steel Pipe," The Engineers' Toolbox, www.engineeringtoolbox.

com.

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 0.42 0.44 0.45

40 0.16 0.16 0.20 0.24 0.26 0.28 0.30 0.32 0.34 0.36 0.38 0.40 0.42 0.44 0.43 0.46 0.52 0.56 0.58 0.60

50 0.20 0.20 0.25 0.30 0.33 0.35 0.38 0.40 0.43 0.45 0.48 0.50 0.53 0.55 0.54 0.58 0.65 0.70 0.73 0.75

60 0.24 0.24 0.30 0.36 0.39 0.42 0.45 0.48 0.51 0.54 0.57 0.60 0.63 0.66 0.65 0.69 0.78 0.84 0.87 0.90

70 0.28 0.28 0.35 0.42 0.46 0.49 0.53 0.56 0.60 0.63 0.67 0.70 0.74 0.77 0.76 0.81 0.91 0.98 1.02 1.05

80 0.32 0.32 0.40 0.48 0.52 0.56 0.60 0.64 0.68 0.72 0.76 0.80 0.84 0.88 0.86 0.92 1.04 1.12 1.16 1.20

90 0.36 0.36 0.45 0.54 0.59 0.63 0.68 0.72 0.77 0.81 0.86 0.90 0.95 0.99 0.97 1.04 1.17 1.26 1.31 1.35

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

REFRIGERANT PIPING DESIGN

System Engineering

Fluid Temperature °F

Refrigerant Piping

3.77 3.90

REFRIGERANT PIPING DESIGN

System Engineering

Figure 20: Coiled Expansion Loops and Offsets.

Large Tubing U-bend (>3/4 in.) Loop Small Tubing U-bend (<3/4 in.)

Table 14: Radii of Coiled Expansion Loops and Developed Lengths of Expansion Offsets.

Anticipated Linear

Expansion (LE) (in)

1/2

1-1/2

2-1/2

3-1/2

R = Centerline Length of Pipe.

L = Centerline Minimum Radius (inches).

1/4 3/8 1/2 3/4 1 1-1/4 1-1/2

6 7 8 9 11 12 13

38 44 50 59 67 74 80

9 10 11 13 15 17 18

54 63 70 83 94 104 113

11 12 14 16 18 20 22 66 77 86 101 115 127 138 12 14 16 19 21 23 25 77 89 99 117 133 147 160

14 16 18 21 24 26 29 86 99 111 131 149 165 179 15 17 19 23 26 29 31 94 109 122 143 163 180 196

16 19 21 25 28 31 34

102 117 131 155 176 195 212

17 20 22 26 30 33 36

109 126 140 166 188 208 226

Nominal Tube Size (OD) inches

MULTI V Water Mini System Installation Manual

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